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U.S. DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY
TO ACCOMPANY MAP MF-2270
MAPS SHOWING PLATINUM-GROUP ELEMENT OCCURRENCES IN THE CONTERMINOUS UNITED STATES, UPDATED AS OF 1993
By Jocelyn A. Peterson
INTRODUCTIONIn conjunction with preparing maps of the geologically
permissive areas for the occurrence of platinum-group elements (PGE) in the conterminous United States (Zientek and others, 1988; Peterson, in press), the Mineral Resource Data System (MRDS) has been updated to provide more detailed information about PGE. MRDS now contains 505 records for PGE in the conterminous United States, 109 of which are completely new records, and many others of which are previously existing records that have been updated with PGE information. These maps and table represent the status of the MRDS records as of November 1993; because MRDS is designed to be dynamic, further information about PGE c?n be added as it becomes important or available.
The initial effort in ihe i970's to catalog PGE localities (Blair and others, 1977; Page and Tooker, 1979) involved an extensive literature search for mention of PGE in all types of mineral deposits and provided individual occurrence records for all identified localities of PGE regardless of PGE concentrations or whether the presence of PGE had been verified. Entries included sites where PGE had been mined, where PGE-bearing minerals had been documented, for which PGE analytical information existed, and where someone reported the presence of PGE. This was a valid approach at that time because there was sparse analytical information for PGE. Since that time, much more analytical information has become available, particularly for podiform chromite deposits (Carlson and others, 1985) but also elsewhere within the United States (see, for example, Page and others, 1992). Some of these recent studies, enabled by more sensitive analytical techniques that can now detect very small quantities of PGE, are beginning to suggest that small amounts of PGE may be present in a wide variety of deposit types, some of which are not hosted within the conventional magmatic ore deposits.
For the present study, every effort was made to enter records into MRDS for PGE occurrences in mines or prospects from which PGE have been mined, for which PGE minerals have been documented, or for which analytical data indicate concentrations of PGE either greater than or equal to 100 ppb or, for podiform chromite deposits, in the upper 10th percentile of analyzed deposits. In addition, some occurrences have been included regardless of PGE concentration, such as those for which
scientific data suggest that further study may be warranted to characterize the occurrences (PGE in the Mesozoic Hsins of the eastern United States, for example) or where the geologic environment is of current interest to explorationists (PGE in black shales, for example). However, to attempt to catalog all known analytical occurrences of PGE withfn the United States would be a formidable task and not of much use in delineating deposits of potential interest for PGE exploration. Should mining technology or economic conditions change such that very low grade occurrences become targets for PGE production, then the appropriate PGE data should be entered into MRDS.
Because of the differing "occurrence" definitions used when entering MRDS data, the PGE information appears somewhat haphazard; rather than delete those records for which the PGE information is unverified or PGE values are low, the table and map in this paper broadly indicate the relative importance of the records by indicating the knowledge of PGE for each MRDS entry and by showing on the map only those localities that meet the analytical cutoff, identified mineral, or PGE production criteria mentioned above. Several references to PGE localit^s in the older literature that could not be approximately located or verified have not been included.
In the 1980's the U.S. Geological Survey Hgan publishing mineral deposit models, some of which characterize types of deposits known to contain PGE (Cox and Singer, 1986). Where appropriate, these models have been assigned to the PGE occurrences documented in MRDS (see table 1). Other PGE occurrences that are fairly well described but which do not fit into published models have been given informal deposit-type names. Tome occurrences are so poorly understood or so poorly described that it was not possible to determine a deposit type. These have been classified as "unknown."
ACKNOWLEDGMENTSThanks are due to M.L. Zientek, who improved the
records for occurrences in the Stillwater Complex, bas?d on his expertise in the region, and who brought several occurrences, not previously included in MRDS, to my attention.
TYPES OF PLATINUM-GROUP-ELEMENT OCCURRENCES
The MRDS data file contains 505 records of reported PGE occurrences within the conterminous United States. Of these occurrences, nearly half are in placers, but PGE have also been reported within many types of lode deposits including conventional magmatic PGE-bearing deposits within mafic and ultramafic rocks and unconventional occurrences in mafic and ultramafic rocks as well as occurrences in unconventional environments. For presentation in this report, PGE occurrences have been grouped into six broad deposit-type categories, a miscellaneous category, and a category for unknowns. The six main categories are residual deposits, magmatic sulfide deposits, magmatic oxide deposits, hydrothermal deposits associated with mafic or ultramafic rocks, hydrothermal deposits associated with calc-alkaline porphyry rocks, and deposits associated with alkaline igneous rocks. The miscellaneous deposit-types category includes polymetallic replacement, massive sulfide, epithermal vein, low-sulfide gold-quartz vein, and carbonate-hosted gold-silver deposits plus several occurrences for which there are no models, including a PGE-enriched black shale, platinum in pyrobitumen, a glacial erratic, and sewage sludge. The unknown deposit-types category is for those occurrences about which little is known other than a location (commonly approximate). Some aspects of PGE occurrences in these eight categories are discussed below. References to information specific to certain occurrences or areas are not cited below; see table 1 for citations for individual occurrences.
RESIDUAL DEPOSITS
Placer gold-PGE
PGE-bearing placers have been reported in many states but are most common in the Pacific Coast states. Many of these PGE occurrences are, or are thought to be, accompanied by placer gold derived from known lode deposits within the drainages. PGE in placers, however, have rarely been traced to specific lode deposits, even though permissive host rocks are usually present within the drainages. An exception to this is the reported occurrence of PGE in placers of streams draining New Rambler copper- gold-PGE deposits in Wyoming. The PGE-bearing placers in the conterminous United States have all been classified as placer gold-PGE deposits (Yeend, 1986), even where gold has not been reported to be present because either the gold to PGE ratio or the geologic environment is inappropriate for the occurrence of placer PGE-gold deposits (Yeend and Page, 1986; Singer and Page, 1986).
In most of the placers, the quantity and grade of PGE are such that they could not have been recovered economically alone and, typically, platinum-group minerals (PGM) were discarded. The extremely low grade (for PGE) but very large gold fields on the major rivers at the base of the Sierra Nevada have been the only consistently
productive placer PGE operations in the conterminous United States. Small quantities of PGE have been produced elsewhere, however, particularly from the Waldo area of the Klamath Mountains, Oreg., and from beach sands along the Pacific coast of Oregon and Washington. Total PGE production for California has been estimated at about 30,000 oz (Sjoberg and Gomes, 1981) and for Oregon at 1,500 oz (Mertie, 1969). This compares with about 68.2 million oz gold from those same placers in California and about 213,000 oz gold from those placers in Oregon (Koschmann and Bergendahl, 1968). PGE production from Washington is not known but is likely small, and placers in other states are not known to have produced PGE.
The PGE reported for many placer localities in the older literature are simply reported as platinum rather than as individual PGE and many have not been verified by modern studies. However, two important older studies of PGE placers are those of Day and Richards (1906), who analyzed heavy-mineral contents of black-sand concentrates from placers in the western United States, and of Logan (1919), who made a comprehensive study of PGE occurrences in California. Other old assay reports for placer (and lode) occurrences may or may not be reliable for several reasons; most are considered unverified unless other corroborating evidence is available. Also, visual identification of PGM in placer (and lode) deposits may or may not be reliable, and most of these are considered unverified in this report. For some of the reported localities, the report of PGE is suspect and may have been the wishful thinking of an eager prospector or the cunning of a swindler. Unverified occurrences of PGE in placers (and in other deposit types as well) have been noted in table 1.
Lateritic nickel
Laterites, common in the Klamath Mountains of California and Oregon and in central Washington, are derived from weathering of ultramafic rocks in accreted ophiolite terranes. PGE have been reported in several lateritic nickel deposits (model: Singer, 1986c) but have been confirmed only at the Hanna Nickel Mine, Oreg., where PGE are present in the 10's of ppb range, and at the Rough and Ready Bench, Oreg., where PGE were produced as a byproduct of a placer operation. In fact, the Hanna Nickel Mine has been the only successfully exploited nickel laterite in the conterminous United States. Other laterites may also contain PGE but have not yet been analyzed for them. Based on the very limited analytical data available, PGE-rich laterites comparable to those in Australia, which have parts per million grade zones (Elliott and Martin, 1991), do not appear to be present because of differences in source rocks, but further analysis may be warranted.
MAGMATIC SULFIDE DEPOSITSMagmatic sulfide deposits containing PGE are generally
found in mafic to ultramafic zoned or layered plutons where
they have formed several styles of mineralization from stratiform or stratabound mineralization of the Merensky Reef PGE (model: Page, 1986c), Picket Pin (Boudreau and McCallum, 1986), or Glen Mountains Layered Complex (R.W. Cooper, 1993, oral commun. to M.L. Zientek) type; to disseminated to massive mineralization near the margins of plutons as in Duluth copper-nickel-PGE (model: Page, 1986b), Stillwater nickel-copper (model: Page, 1986d), or synorogenic-synvolcanic nickel-copper (model: Page, 1986e) deposits; and to more discordant, lenticular, or less lithologically constrained mineralization like that of sills in the Mesozoic basins of the eastern United States (Gottfried and others, 1989), several mineralized areas of the Stillwater Complex, and Acoje nickel-copper-PGE deposits (model not yet published).
The most important area of the conterminous United States for magmatic sulfide deposits is the Stillwater Complex, Mont., which is host to the only productive primary PGE deposit in the conterminous United States a Merensky Reef PGE-type deposit in the Banded series, the uppermost major division of this large layered mafic to ultramafic intrusion. Although thus far exploited only at the Stillwater Mine, this mineralized zone, the J-M Reef, extends the entire length of the complex. Other styles of sulfide mineralization that have also been found in the Banded series include Picket Pin-type deposits related to impermeable horizons and more discordant mineralization as at the Janet 50 and Coors 602 prospects. In the Basal series and locally in the Peridotite zone of the Ultramafic series (the other two major divisions of the Stillwater Complex) are Stillwater nickel-copper deposits, which typically contain 10's to a few hundred parts per billion total PGE. This style of mineralization also extends the length of the complex.
Also important for PGE mineralization is the Duluth Complex, Minn., a large composite intrusive mafic complex related to Keewenawan flood basalt eruptions during the formation of the Proterozoic Midcontinent rift. The base of the complex contains copper-nickel deposits, many of which are known to contain parts per million-level PGE in high-grade zones. Currently, PGE are not known from all of these deposits, but the geologic setting allows their presence. Most of the MRDS records report PGE only at those localities where they are known to be present.
Other layered mafic plutons in which sulfide-related PGE have been found include the Glen Mountains Layered Complex, Okla., the Lake Owen Complex, Wyo., and the Lady of the Lake Complex, Mont., all of which have greater than 500 ppb platinum*palladium in mineralized areas.
Few synorogenic-synvolcanic nickel-copper and Acoje nickel-copper-PGE deposits have been identified within the conterminous United States. The Shamrock Mine, southwestern Oregon, and the Friday Mine, southern California, which contain greater than 500 ppb platinum+palladium, are examples of PGE-bearing synorogenic-synvolcanic deposits. The Illinois River sulfide occurrence, Oregon, contains more than 500 ppb platinum +palladium and is similar to Acoje deposits. At
Preston Peak in northern California, the low 10's of parts per billion PGE mineralization has some similarities to that of Acoje deposits but is not well described by the mode' and has thus been classified as unknown.
MAGMATIC OXIDE DEPOSITSSome magmatic segregations in mafic and ultramafic
intrusions formed oxide rather than sulfide deposits. The most important of these for PGE in the conterminous United States are Bushveld chromite-type (model: Page, 1986a) chromitite layers in the Peridotite zone of the Ultramafic series in the Stillwater Complex and podiform chromite deposits (model: Albers, 1986) in accreted terranes of the continental margins. Both types of deposits produced only minor amounts of chromite, mainly during war times, when foreign sources were restricted and government support programs were active. Less important in the United States are Alaskan PGE (model: Page and Gray, 1986), PGE-bearing oxide deposits of the Ante'ope- Pony area of Montana, and PGE-enriched areas o* the Humboldt lopolith of Nevada.
The rocks enriched in chromite in the Stillwater Complex are found in several layers extending the lenoth of the complex, all of which contain some PGE. However, the B chromitite layer, which is particularly enriched in PGE, has been informally called PGE-enriched stratiform chromitite (Hammarstrom and Zientek, 1993) because it is sufficiently enriched as to be potentially exploitable for primary PGE deposits. These deposits contain part- per million-level platinum and palladium, whereas the other chromite layers contain less PGE and would net be economic for PGE production alone. These Bushveld chromite-type deposits, if mined for chromium, would not likely produce PGE in the recovery process.
There are numerous podiform chromite deposits in the accreted ophiolite terranes of the Pacific Coast states and some in the Appalachian Blue Ridge province. Many of the deposits in California and Oregon and a few in the eastern United States have been analyzed for PGE and small amounts of PGE are present in virtually all pod *orm chromite deposits (Carlson and others, 1985; Lipin, 1984). For existing records in which podiform chromite deposits were said to contain PGE, these commodities have been retained regardless of their PGE content as determin?d by Carlson and others (1985). Of the remaining pod form chromite deposits for which there are analyses, records for those exceeding the upper 10th percentile value of one or more PGE (64 ppb Pt, 10 ppb Pd, 26 ppb Rh, 320 ppb Ru, 170 ppb Ir, see Page and others, 1986) were either updated to show the presence of PGE or added as new records if no record existed. Podiform chromite deports in Washington have not received the same scrutiny as those in California and Oregon. Three chromite deposits in Washington are reported to contain PGE, one with supporting analytical data, and are included in MRDS; others may also contain relatively high concentrations of PGE but have not yet been analyzed. The very small I odies
of chromite-bearing ultramafic rocks in accreted terranes in the Blue Ridge province of the Appalachian Mountains typically contain PGE in the tens of parts per billion range (Lipin, 1984, oral commun., 1993).
Plutons at Chanchelulla Peak, Calif., and Tincup Peak, Oreg., represent mineralized Alaska-type plutons, although the style of mineralization is not typical of of Alaskan PGE deposits in that accompanying chromite or other oxides are lacking (M.L. Zientek, written commun., 1993). At Chanchelulla Peak, platinum and palladium values range up to 500 ppb but at Tincup Peak, values are only in the 10's of ppb for mineralized samples.
The Antelope-Pony area of Montana is one of several areas of ultramafic rocks in the Archean province of Wyoming and Montana in which are found concentrations of chromite (M.L. Zientek, 1993, written commun.). In the Antelope-Pony area, osmiridium was identified. PGE have also been found in the Red Lodge district, Montana, but not in sufficient quantity (64 ppb Pt+Pd+Rh, Loferski, 1986) to merit inclusion as a MRDS record for PGE at this time.
The Humboldt lopolith hosts magnetite deposits that locally contain more than 500 ppb PGE. The origin of these deposits is not yet well understood, so while they may represent a type of magmatic oxide deposit, they have been classified here as unknown.
HYDROTHERMAL DEPOSITS ASSOCIATED WITH MAFIC OR ULTRAMAFIC ROCKS
Two mining districts have long been known to contain PGE in what are generally thought of as somewhat unconventional settings. Although these deposits are spatially associated with mafic intrusions, the deposit characteristics are more like those of hydrothermal deposits than conventional magmatic segregation deposits. These areas are the Revais Creek area, Montana, and the New Rambler area, Wyoming. In both districts copper, gold, and PGE are the main commodities, although not all the mines in each district are known to contain PGE. The Revais Creek deposits are associated with diorite and gabbro dikes but are also hosted by adjacent quartzite and argillite, particularly in zones of intense shearing and alteration (Buckley, 1992). The New Rambler ores were found in irregular shaped pockets within decomposed, sheared, amphibolitized gabbro and ultramafic rocks that may be related to a quartz-carbonate fissure vein system (M.L. Zientek, 1993, written commun.). One mine in each district has produced several hundred ounces of PGE. Ore samples from some other mines in these districts contain as much as parts per million-level PGE and there are unconfirmed reports of PGE from still other mines in these areas. There are no published deposit models for these deposits and they are insufficiently understood currently, due to poor exposure and intense oxidation, to know whether they belong within a single model or merit separate models. For the MRDS records, these deposits have been assigned the informal model names New Rambler copper- gold-PGE and Revais Creek copper-gold-PGE.
HYDROTHERMAL DEPOSITS ASSOCIATED WITH CALC-ALKALINE PORPHYRY ROCKS
Several porphyry copper (model: Ccx, 1986b) and porphyry-related skarn (model: Cox, 1986c) deposits, such as the Mission Mine, Ariz., Santa Rita Mine, N.Mex., Liberty Pit, Nev., and Bingham Mine, Utah, have produced small amounts of PGE as byproducts of the copper mining, although the amount of this PGE product'on generally is not reported. However, porphyry copper deposits have very low PGE grades, as determined f-om the small amounts of PGE that are extracted from sm?lter recoveries. Small quantities of PGE may be present ir other deposits related to calc-alkaline rocks as has been found at the Copper Canyon Mine, Nev., and at Carr Fork, Utah, but where smelters receive ore from several mines, the source of any recovered PGE cannot be determined. The nature of the PGE occurrence in porphyry copper and related deposits is not understood. Additionally, one Climax molybdenum deposit (model: Ludington, 1986), the Questa mine in the Red River district, N.Mex., reportedly contains PGE, but this occurrence has not been verified. A few deposits identified as polymetallic veins (model: Cox, 1986a) are reported to contain PGE. The only analytical data come from the Gingerload deposi*, Nev., where mineralized samples are reported to contain as much as 600 ppb platinum and PGE minerals have been identified, and from the New Light Mine, Wash., whe~e platinum was found in mill concentrates.
DEPOSITS ASSOCIATED WITH ALKALINE IGNEOUS ROCKS
Three PGE-bearing deposits in the conterminous United States are associated with alkaline rocks and one with a carbonatite. The alkaline associated deposits are the Copper Hill Mine, Cob., in the alkaline /llard Stock; the Copper King Mine, Mont., associated witk the syenite at Goose Lake; and the Comstock Mine, Wash., associated with alkaline rocks of Shasket Creek. All carry as much as parts per million values of platinum and palladium in sulfide concentrates or sulfide-rich rock samples. None of these deposits have produced PGE but their concentrations suggest potential recovery as byproduct? of any future mining operations. Unlike the Phalabora deposit, the Iron Hill carbonatite, Colorado (model: Singer, 1986a), is not particularly enriched in PGE. A sample collected for a scientific study ran only 39 ppb platinum.
MISCELLANEOUS DEPOSIT TYPESSeveral types of deposits fall into tho miscellaneous
category, which is simply a collection of deposit types that do not fit into any of the foregoing categories. They all are found in unconventional environments fcr PGE deposits. Of these, two types are important for PGE while the presence of PGE in many of the others is unverified or a scientific curiosity. The Boss Mine in the Goodsprings district, Nev., has been characterized as a polymetallic replacement-type deposit (D.A. Singer, written commun.,
1993; model: Morris, 1986) from which about 1,200 oz of platinum-*-palladium have been produced along with gold, silver, copper, and a little lead. Mines in this district are hosted within dolomitized limestone near a quartz monzonite sill or within the sill itself in an area that appears to lack mafic or ultramafic rocks. Geophysical data suggest, however, that an ultramafic mass may underlie the district at depth (D.A. Singer, oral commun., 1993). Although PGE have been reported in old assays of ore collected at several other mines in this district, there have been no recent studies to verify this. Also important because of recent interest in PGE in black shales of China and Canada (Grauch and others, 1991) is the Gibellini deposit in Nevada, where more than 500 ppb platinum has been detected in mineralized samples.
Kuroko massive sulfide deposits (model: Singer, 1986b) and other massive sulfide deposits appear to contain small quantities of PGE as seen in old smelter returns from the Iron Mountain Mine, Calif., and as traces in channel samples at the Broadway claims, Wyo.
Reports of PGE in a few epithermal vein deposits in the western United States are unverified. Generally, these deposits are not well enough described to indicate the type of vein deposit, but they were tentatively classified as Sado epithermal (model: Mosier and others, 1986a) or Comstock epithermal (model: Mosier and others, 1986b) veins. Such vein deposits are not likely candidates for economic concentrations of PGE.
Gold samples from three low-sulfide gold-quartz vein mines (model: Berger, 1986b) in the Alleghany district of the Mother Lode (Calif.) contain as much as 86.4 ppm platinum, indicating that platinum, at least, is present in this type of deposit. There are also unconfirmed reports of PGE from several other possible low-sulfide gold-quartz veins throughout the western United States.
Jasperoid samples collected from mine dumps near Mackay, Idaho, contain as much as 384 ppb platinum and 88 ppb palladium. The deposits have been tentatively identified as carbonate-hosted gold-silver deposits (model: Berger, 1986a).
Verified occurrences of PGE are known from a pyrobitumen sample collected near Fonda, N.Y., from a glacial erratic found near Plattsburg, N.Y., and from sewage sludge collected at a sewage treatment facility near San Francisco, Calif. These occurrences are scientific curiosities.
UNKNOWN DEPOSIT TYPESNineteen PGE localities are listed as having an
unknown deposit type. A few of these have been discussed above. The literature for most of the rest of these deposits generally had little descriptive information other than a location and commodity list. In a few cases, it was not even possible to determine whether the deposit was a placer or lode.
PRESENTATION OF THE TABLE ANDFor each MRDS record listing PGE as a comm-xlity,
table 1 provides a map number (used in this publication only) for those locations plotted on the map (see below); the MRDS record number; name of the deposit used in MRDS; location by county and by latitude and longitude; deposit model assignment, using published U.S. Geological Survey models where appropriate, informal deposit-type designations followed by "(no model)", or "unknown"; a reference list showing in bold type those reference- that mention PGE; and an indication of the type of PGE knowledge available. This information provides a clear indication of how to find any particular occurrence within the MRDS records and what literature was used to complete the record. The literature cited within MRDS is not intended to be exhaustive for any given property. All unpublished sources are cited in table 1 as "Unpub. data" and in the reference list that accompanies table 1 as "Unpub. data. See individual MRDS record for specific data source." For some records, I could not find all the cited references, particularly some of the unpublished dat«\ and for others, I examined all the cited material but found no reference to the PGE information already contained in the record; this is indicated in the references and PGE knowledge columns of the table.
The conterminous United States map and insets show the locations for those PGE localities compiled in MRDS that meet the geochemical, mineralogical, or production criteria stated above; not plotted are those localities for which the presence of PGE has not been verified or for which analytical values are low. Different map symbols represent occurrences in the deposit-type groupings discussed above. In addition to categorizing occurrences by deposit type, the importance of each deposit is indicated by the size of the symbol used; several deposits thet are important from a production, geologic, or historical perspective are shown on the maps with a larger svfnbol (and are in bold type in table 1).
REFERENCES CITEDAlbers, J.P., 1986, Descriptive model of pod : form
chromite, in Cox, D.P., and Singer, D.A., eds., Mineral deposit models: U.S. Geological Survey Bulletin 1693, p. 34.
Berger, B.R., 1986a, Descriptive model of carbonate- hosted Au-Ag, in Cox, D.P., and Singer, D.A., eds., Mineral deposit models: U.S. Geological S-irvey Bulletin 1693, p. 175.
Berger, B.R., 1986b, Descriptive model of low-sulfide Au- quartz veins, in Cox, D.P., and Singer, D.A., eds., Mineral deposit models: U.S. Geological 5'irvey Bulletin 1693, p. 239.
Blair, W.N., Page, N.J, and Johnson, M.G., 1977, Map and list of reported occurrences of platinum-group metals in the conterminous United States-. U.S. Geological Survey Miscellaneous Field Studies Map MF-861, scale 1:5,000,000.
Boudreau, A.E., and McCallum, I.S., 1986, Investigation of the Stillwater Complex: III. The Picket Pin Pt/Pd deposit: Economic Geology, v. 81, p. 1953-1975.
Buckley, Steve, 1992, Geologic description of the Rathead Reservation, in Manydeeds, S.A., ed., 1992 Mineral frontiers on Indian lands: U.S. Bureau of Indian Affairs, Division of Energy and Mineral Resources Publication G-92-2, p. 39-47.
Carlson, C.A., Wilson, S.A., Carlson, R.R., Bradley, L.A., Cornell, J., Gent, C.A., Gross, W.D., Groeneboer, H., Haffty, J., Haubert, A.W., Love, A.H., McDade, J.M., Moore, R.F., Riley, L.B., Moring, B.C., Singer, D.A., and Page, N.J, 1985, Analyses for platinum-group elements in samples from podiform chromite deposits, California and Oregon: U.S. Geological Survey Open- File Report 85-442, 14 p.
Cox, D.P., 1986a, Descriptive model of polymetallic veins, in Cox, D.P., and Singer, D.A., eds., Mineral deposit models: U.S. Geological Survey Bulletin 1693, p. 125.
Cox, D.P., 1986b, Descriptive model of porphyry Cu, in Cox, D.P., and Singer, D.A., eds., Mineral deposit models: U.S. Geological Survey Bulletin 1693, p. 76.
Cox, D.P., 1986c, Descriptive model of porphyry Cu, skarn-related deposits, in Cox, D.P., and Singer, D.A., eds., Mineral deposit models. U.S. Geological Survey Bulletin 1693, p. 82.
Cox, D.P., and Singer, D.A., eds., 1986, Mineral deposit models: U.S. Geological Survey Bulletin 1693, 379 p.
Day, D.T., and Richards, R.H., 1906, Useful minerals in the black sands of the Pacific slope: U.S. Geological Survey, Mineral Resources of the United States, Calendar Year 1905, p. 1175-1258.
Elliott, S.J., and Martin, A.R., 1991, Chapter 1 - Alaskan- type intrusive complexes of the Fifield belt, central New South Wales, in Elliott, S.J., and Martin, A.R., eds., Geology and mineralisation of the Fifield platinum province, New South Wales: Sixth International Platinum Symposium Guidebook for the Pre- Symposium Field Excursion, p. 4-11.
Gottfried, David, Froelich, A.J., Aruscavage, P.J., Rait, Norma, 1989, Anomalous palladium-platinum occurrences in Mesozoic quartz-normative tholeiitic suites in the eastern United States, in Schindler, K.S., ed., USGS research on mineral resources 1989, program and abstracts: U.S. Geological Survey Circular 1035, p. 23-25.
Grauch, R.I., Coveney, R.M., Jr., Murowchick, J.B., and Nansheng, Chen, 1991, Black shales as hosts for unconventional platinum-group-elem^nt resources? Examples from southern China ard the Yukon, Canada, and implications for U.S. resources labs.J, in Good, E.E., Slack, J.F., and Kotra, R.K., eds., USGS research on mineral resources 1991, program and abstracts: U.S. Geological Survey Circular 1062, p. 3.
Hammarstrom, J.M., and Zientek, M.L., 1993, Chapter E, Mineral occurrences and level of exploration, in Hammarstrom, J.M., Zientek, M.L., end Elliott, J.E., eds., Mineral resource assessment of the Abasroka- Beartooth study area, Custer and Gelatin National Forests, Montana: U.S. Geological Survey Open-File Report 93-207, 78 p.
Koschmann, A.H., and Bergendahl, M.H., 1968, Principal gold-producing district of the United States: U.S. Geological Survey Professional Paper 610, 283 p.-
Lipin, B.R., 1984, Chromite from the Blue Ridge Province of North Carolina: American Journal of Science, v. 284, p. 507-529.
Loferski, P.J., 1986, Petrology of metamorphosed chromite-bearing ultramafic rocks frorr the Red Lodge district, Montana: U.S. Geological Survey Bulletin 1626-B, 34 p.
Logan, C.A., 1919, Platinum and allied metals in California: California State Mining Bureau Bulletin 85, 120 p.
Ludington, S.D., 1986, Descriptive model of Climax Mo deposits, in Cox, D.P., and Singer, D.A., eds., Mineral deposit models: U.S. Geological Surve-» Bulletin 1693, p. 73.
Mertie, J.B., Jr., 1969, Economic geology of the platinum metals: U.S. Geological Survey Professional Paper 630, 120 p.
Morris, H.T., 1986, Descriptive model of polymetallic replacement deposits, in Cox, D.P., and Singer, D.A., eds., Mineral deposit models: U.S. Geological Survey Bulletin 1693, p. 99-100.
Mosier, D.L., Berger, B.R., and Singer, D.A., 1986a, Descriptive model of Sado epitherma1 veins, in Cox, D.P., and Singer, D.A., eds., Mineral deposit models: U.S. Geological Survey Bulletin 1693, p. 154.
Mosier, D.L., Singer, D.A., and Berger, B.R., 1986b, Descriptive model of Comstock epitl -?rmal veins, in Cox, D.P., and Singer, D.A., eds., Mineral deposit models: U.S. Geological Survey Bulletin 1693, p. 150.
Page, N.J, 1986a, Descriptive model of Bushveld Cr, in Cox, D.P., and Singer, D.A., eds., Mineral deposit models: U.S. Geological Survey Bullet'~\ 1693, p. 13.
Page, N.J, 1986b, Descriptive model of Duluth Cu-Ni-PGE, in Cox, D.P., and Singer, D.A., eds., Mineral deposit models: U.S. Geological Survey Bulletin 1693, p. 16.
Page, N.J, 1986c, Descriptive model of Merensky Reef PGE, in Cox, D.P., and Singer, D.A., eds., Mineral deposit models: U.S. Geological Survey Bulletin 1693, p. 14.
Page, N.J, 1986d, Descriptive model of Stillwater Ni-Cu, in Cox, D.P., and Singer, D.A., eds., Mineral deposit models: U.S. Geological Survey Bulletin 1693, p. 11.
Page, N.J, 1986e, Descriptive model of synorogenic- synvolcanic Ni-Cu, in Cox, D.P., and Singer, D.A., eds., Mineral deposit models: U.S. Geological Survey Bulletin 1693, p. 28.
Page, N.J, Bagby, W.C., Madrid, R.J., and Moring, B.C., 1992, Platinum-group elements occurrences in gold deposits in Nevada, Oregon, and Idaho: U.S. Geological Survey Bulletin 1877-G, 8 p.
Page, N.J, and Gray, Floyd, 1986, Descriptive model of Alaskan PGE, in Cox, D.P., and Singer, D.A., eds., Mineral deposit models: U.S. Geological Survey Bulletin 1693, p. 49.
Page, N.J, Singer, D.A., Moring, B.C., Carlson, C.A., McDade, J.M., and Wilson, S.A., 1986, Platinum- group element resources in podiform chromitites from California and Oregon: Economic Geology, v. 81, p. 1261-1271.
Page, N.J, and Tooker, E.W., 1979, Preliminary map of platinum and platinum-group metal provinces in the conterminous United States: U.S. Geological Survey Open-File Report 79-576B, scale 1:5,000,000.
Peterson, J.A., in press, Platinum-group elements in sedimentary environments in the conterminous United States with a section on Platinum-group elements in coal by R.B. Finkelman and S.J. Tewalt: U.S. Geological Survey Bulletin 2049, 56 p. ms.
Singer, D.A., 1986a, Descriptive model of carbonatite deposits, in Cox, D.P., and Singer, D.A., eds., Mineral deposit models: U.S. Geological Survey Bulletin 1693, p. 51.
Singer, D.A., 1986b, Descriptive model of kuroko massive sulfide, in Cox, D.P., and Singer, D.A., eds., Mineral deposit models: U.S. Geological Survey Bulletin 1693, p. 189.
Singer, D.A., 1986c, Descriptive model of lateritic Ni, in Cox, D.P., and Singer, D.A., eds., Mineral deposit models: U.S. Geological Survey Bulletin 1693, p. 252.
Singer, D.A., and Page, N.J, 1986, Grade and tonnage model of placer PGE-Au, in Cox, D.P., and Singer, D.A., eds., Mineral deposit models: U.S. Geological Survey Bulletin 1693, p. 265-269.
Sjoberg, J., and Gomes, J.M., 1981, Platinum-group minerals in alluvial deposits, northern and central California: California Geology, v. 34, p. 91-98.
Yeend, W.E., 1986, Descriptive model of placer Au-PGE, in Cox, D.P., and Singer, D.A., eds., Mineral deposit models: U.S. Geological Survey Bulletin 1693, p. 261.
Yeend, W.E., and Page, N.J, 1986, Descriptive model of placer PGE-Au, in Cox, D.P., and Singer, D.A., eds., Mineral deposit models: U.S. Geological Survey Bulletin 1693, p. 265.
Zientek, M.L., Allcott, G.H., Page, N.J, and Menzie, W.D., 1988, Opportunities for a platinum-group-e'ement resource appraisal of the United States: U.S. Geological Survey Open-File Report 88-254, 14 p.
Tabl
e 1.
List
of p
latin
um-g
roup
-ele
men
t (PG
E) o
ccur
renc
es w
ithin
the
cont
erm
inou
s Uni
ted
Stat
es th
at a
rc c
onta
ined
in th
e U
.S. G
eolo
gica
l Sur
vey'
s Min
eral
Res
ourc
e D
ata S
yste
m (M
RD
S)
[Occ
urre
nces
are
list
ed a
lpha
betic
ally
by
stat
e, n
umbe
red
cons
ecut
ivel
y w
ithin
each
stat
e, a
nd .n
ames
of p
rope
rties
are
show
n (w
here
kno
wn)
. Pr
oper
ty n
ames
show
n in
bol
d ty
pe in
dica
te im
porta
nt lo
calit
ies.
Ast
eris
k (*
) in
Map
num
ber c
olum
n in
dica
tes
unve
rifie
d oc
curr
ence
not
plo
tted
on m
aps.
Din
Map
num
ber c
olum
n in
dica
tes
dist
rict r
ecor
d no
t plo
tted
on m
aps t
r av
oid
site
reco
rd d
uplic
atio
n. R
efer
ence
s sh
own
in b
old
type
cont
ain
PGE
info
rmat
ion;
thos
e fo
llow
ed b
y *
indi
cate
refe
renc
e w
as m
ot fo
und
in th
is s
tudy]_
________________________
Map
M
RDS
num
ber
reco
rdnu
mbe
r
Prop
erty
nam
eC
ount
yLa
titud
e Lo
ngitu
de
(nor
th)
(wes
t)R
efer
ence
s cite
d in
MR
DS
reco
rds
mod
el ra
mie
sLe
vel o
f PG
E kn
owle
dge
Ariz
ona
Mar
icop
a
Coc
onin
o
33°3
6'50
" 11
2°50
'53"
U
nkno
wn
Se^-
OS"
ll
Vyn
OT
U
nkno
wn
34°0
2'03
" 11
2°18
33"
Plac
er A
u-PG
E
D00
2502
B
lue
Kno
b N
os. 3
0,31
, 32
Pros
pect
s M
0454
70
Cat
arac
t Can
yon
M04
5469
C
olum
bia M
ine
* M
P000
50
Det
ectio
n an
d Pe
gmat
ite
Mar
icop
a 33
°07'
09"
112'
45'2
T U
nkno
wn
Cla
ims
1 M
OS0
387
Mis
sion
Min
e Pi
rna
31°5
932"
Ii
r03'
49"
Porp
hyry
Cu,
ska
rnre
late
d
M04
S468
Pl
omos
a Pla
cers
LaP
az
33°3
7'45
" 11
4°07
'06"
Pl
acer
Au-
PGE
M00
1911
Sa
n D
omin
go P
lace
rs
Mar
icop
a 33
°53'
41"
112°
38'5
7"
Plac
er A
u-PG
E
M00
4S68
Tr
igo
Plac
ers
Yum
a33
e03'
13"
114°
3833
" Pl
acer
Au-
PGE
Kei
th a
mi o
ther
s, 1
983
Unp
ub. d
ata*
Bla
ke,
1980
Qui
ring
, 1
9«
Bro
wne
, 186
8D
ay a
nd R
icha
rds,
190
6G
aibr
aith
and
Bre
nnan
, 19
70Jo
hnso
n, 1
972a
Lind
gren
, 192
6Q
uiri
ng,
1962
McD
onne
ll,
1986
Pete
rson
and
oth
ers,
198
9A
rgaI
U%
2C
oope
r, 19
60D
ayto
n, 1
988
Ele
vato
rskl
, 19
83G
ale,
196
5K
eith
, 197
4K
inni
son,
196
6R
icha
rd a
nd C
ourtr
ight
, 19S
9W
aleg
na, 1
989
Wor
ld M
inin
g, 1
972
But
ler,
1937
Elsi
ng a
nd H
eine
man
, 193
6Jo
hnso
n, 1
972a
Qui
ring
, 19
62W
ilson
, 196
1G
aibr
aith
and
Bre
nnan
, 19
70Jo
hnso
n, 1
972a
Qui
ring
, 19
62W
ilson
, 196
1Jo
hnso
n, 1
972a
Wils
on, 1
%1
Una
ble
to fi
nd s
ourc
e of
PG
E da
ta (m
ay b
e un
pub.
dat
a)
Unv
erifi
ed re
port
of P
GE
$1.8
0Aon
Pt i
n bl
ack-
sand
con
cent
rate
s, 4
Ib
conc
entra
te fr
om 2
50 Ib
gra
vel (
grad
e =
abou
t 33
ppb
Pt)
51 p
pb P
t in
chip
sam
ple
(fire
ass
ay)
Byp
rodu
ct P
GE
in sm
elte
r ret
urns
(am
ount
un
know
n)
Unv
erifi
ed re
port
of P
GE
Unv
erifi
ed re
port
of P
GE
Una
ble
to fi
nd so
urce
of P
GE
data
Ark
ansa
s*
M04
5425
B
ates
ville
Inde
pend
ence
35
°483
9"
091°
37'2
8"
Unk
now
nH
ill,
1924
Q
uiri
ng,
1962
Unv
erifi
ed re
port
of P
GE
Cal
iforn
ia1
M04
5280
M
en M
ine
M04
5336
A
ltavf
lle
Hum
bold
t 41
°153
2"
123°
36W
Pl
acer
Au-
PGE
Cal
aver
as
38°0
6'07
" 12
0°33
'17"
Pl
acer
Au-
PGE
* M
0554
77
And
erso
nVaU
ey P
lace
r M
endo
cino
39
°047
9"
123°
27'4
2"
Plac
er A
u-PG
E
Irel
an, 1
888
Low
ell,
1916
PSF
C1,
196
0C
lark
and
Lyd
on,
1962
Cla
rk a
nd o
ther
s, 19
63Er
ic a
nd o
ther
s, 19
55H
ende
rson
and
oth
ers,
1966
Han
ks,
1884
Mur
doch
and
Web
b, 1
966
Min
ted
gold
from
pro
perty
repo
rted
to h
ave
aum
Unv
erifi
ed b
ypro
duct
PG
E pr
oduc
tion
Unv
erifi
ed re
port
of P
GE
8 9 10 11 12 13 14 15
M04
5288
A
nton
e K
aus
MP0
0069
A
nton
e N
iche
lini
M04
5337
A
das G
old
Dre
dgin
g C
alav
eras
Cor
p.
M04
5306
B
eebe
e Cl
aim
s Tr
inity
M04
5338
B
eegu
m C
reek
M04
5284
B
ig L
agoo
n M
inin
g Co
. H
umbo
ldt
Del
Nor
te
41°4
7'42
" 12
3°57
34"
Plac
er A
u-PG
E
38°3
0'03
" 12
2°18
'20"
Po
difo
nn c
hrom
ite
38°1
2'10
" 12
0°57
'59"
Pl
acer
Au-
PGE
40°3
5'49
" 12
3°16
'48"
Pl
acer
Au-
PGE
40°2
0'47
" 12
2°51
31"
Plac
er A
u-PG
E
41°1
0'44
" 12
4°06
'53"
Pl
acer
Au-
PGE
Shas
ta,
Teha
ma
MP0
0038
B
lack
Eag
le
M04
5266
B
lue
Can
yon
M04
5317
B
lue N
ose
Min
e
M70
0420
B
onan
za C
laim
M00
7350
B
rand
on
M04
5299
B
urnt
Ran
ch
M04
5344
B
utte
Cre
ek
M04
S314
Ca
Uah
an
M04
S32S
Ca
lpeU
a
M04
5335
C
aman
che-
Lanc
ha
Pla
na
16
M00
7475
C
aria
17
M04
5311
C
arrie
r Gul
ch
Sisk
iyou
41
°55'
51"
123°
0939
" Po
difo
rm c
hrom
ite
Plac
er
39°1
5<27
" 12
0°42
'40"
Pl
acer
Au-
PGE
Sisk
iyou
41
°34'
03"
123°
31'4
7"
Plac
er A
u-PG
E
Del
Nor
te
41°5
5'57
" 12
3°56
'43"
Po
difo
rm c
hrom
ite
e D
orad
o 38
°33'
57"
120°
56'0
3"
Podi
form
chr
omile
Trin
ity40
°483
9"
123°
28'4
7"
Plac
er A
u-PG
E
Butte
39
°41'
56"
121°
46'5
5"
Plac
er A
u-PG
E
Sisk
iyou
41
°18'
46"
122°
48'0
2"
Plac
er A
u-PG
E
Men
doci
no
39°l
3'2r
12
3°12
37"
Plac
er A
u-PG
E
Am
ador
, 38
°13'
13"
120°
56W
" Pl
acer
Au-
PGE
Cal
aver
as
Del
Nor
te
41°4
2'25
" 12
3°57
36"
Podi
form
chr
omite
Trin
ity
40°3
0'59
" 12
3°05
'01"
Pl
acer
Au-
PGE
Log
an,
1919
O
'Bri
en,
1952
P
SFC
1, 1
960
Car
lson
and
oth
ers,
198
5 D
ow a
nd T
haye
r, 19
46
Cla
rk a
nd L
ydon
, 19
62
Log
an a
md
Fran
ke,
1936
C
lark
, 197
0a
Log
an,
1919
Sp
ence
r,
1971
C
lark
, 197
0a
Log
an,
1919
Sp
ence
r,
1971
L
ogan
, 19
19
Wat
ts, 1
893
Alie
n, 1
941b
Car
lson
and
oth
ers,
198
5W
ells
and
Cat
er, 1
950
Wel
ls a
nd o
ther
s, 19
49C
lark
, 197
0aD
ay a
nd R
icha
rds,
190
6L
ogan
, 19
19
Car
lson
and
oth
ers,
198
5C
ater
and
Wel
ls, 1
953
O'B
rien,
195
2U
npub
. dat
aW
ells
and
oth
ers,
1946
Bra
dley
and
oth
ers,
1918
Car
lson
and
oth
ers,
198
5C
ater
and
oth
ers,
1951
Cla
rk a
nd C
arls
on, 1
956
Lind
gren
, 189
4C
lark
, 197
0aD
ay a
nd R
icha
rds,
190
6
Cla
rk,
1970
a,b
Log
an,
1919
C
lark
, 19
70a,
b
Day
and
Ric
hard
s, 1
906
Log
an,
1919
L
ogan
, 19
19
Spen
cer,
19
71
Cla
rk,
1970
a, b
C
lark
and
Lyd
on, 1
962
Log
an,
1919
, 19
25
Log
an a
nd F
ranc
e, 1
936
Car
lson
and
oth
ers,
198
5
Smal
l byp
rodu
ct P
GE
prod
uctio
n (a
bout
2.
25 o
z)
21 p
pb P
d in
chr
omiti
te sa
mpl
e (f
ire a
ssay
)
Unv
erifi
ed re
port
of P
GE
in b
lack
-san
d co
ncen
trate
s V
isua
l ide
ntifi
catio
n of
PG
M
Smal
l byp
rodu
ct P
GE
prod
uctio
n (a
bout
5
oz)
Ass
ay y
ield
ed 0
.5 o
z/to
n Pt
in b
lack
-san
d co
ncen
trate
s (a
naly
tical
met
hod
unkn
own)
, (g
rade
= a
bout
57
ppb)
19 p
pb P
d, 2
7 pp
b R
h in
chr
omiti
te sa
mpl
e
Wel
ls a
nd o
ther
s, 19
46
Cla
rk, 1
970a
L
ogan
, 19
19
Spen
cer,
19
71
$290
.10A
on P
t in
blac
k-sa
nd c
once
ntra
tes,
co
ncen
tratio
n fa
ctor
not
kno
wn
Smal
l byp
rodu
ct P
GE
prod
uctio
n (<
$10
in
1916
)33
0 pp
b R
u in
chr
omiti
te sa
mpl
e (f
ire a
ssay
)
ISO
ppb
Pt, 1
86 p
pb P
d, 2
00 p
pb t in
ch
rom
itite
sam
ple
(fire
assa
y)
$38.
40A
on P
t in
blac
k-sa
nd c
once
ntra
tes,
4.
5 Ib
con
cent
rate
s fr
om 1
yd3
gra
vel
(gra
de =
abo
ut 6
5 pp
b)Sm
all b
ypro
duct
PG
E pr
oduc
tion
(abo
ut 8
oz
/yr,
unkn
own
dura
tion)
Unv
erifi
ed b
ypro
duct
PG
E pr
oduc
tion
Osm
iridi
um g
rain
ass
ayed
49%
IT, 3
2% O
s,
10%
Pt (
anal
ytic
al m
etho
d un
know
n)Sm
all b
ypro
duct
PG
E pr
oduc
tion
(am
ount
un
know
n)
13 p
pb P
d in
chr
omiti
te sa
mpl
e (f
ire a
ssay
)
Vis
ual i
dent
ifica
tion
of P
GM
; unv
erifi
ed
bypr
oduc
t pro
duct
ion
Tabl
e 1.
List
of p
latin
um-g
roup
-ele
men
t (PG
E) o
ccur
renc
es w
ithin
the
cont
erm
inou
s U
nite
d St
ates
that
are
con
tain
ed in
the
U.S
. Geo
logi
cal S
urve
y's
Min
eral
Res
ourc
e D
ata
Syst
em (
MR
DS)
Con
tinue
dM
ap
MR
DS
Prop
erty
nam
e nu
mbe
r re
cord
nu
mbe
r
Cou
nty
Latit
ude
Long
itude
D
epos
it ty
pe(n
orth
) (w
est)
(Pub
lishe
d m
odel
nam
es
_______use
d w
here
app
licab
le)
Ref
eren
ces
cite
d in
MR
DS
reco
rds
Leve
l of P
GE
kno
wle
dge
Cal
ifor
nia
Con
tinue
d18
M
0453
15
Cas
teU
a
* 19 20 *
M04
5275
C
avan
augh
Min
eM
P000
49
Cha
nche
lulla
Peak
M04
5340
C
lear
Cre
ek
M04
5282
C
over
Fla
t Pla
cer
21
M04
5293
C
oon
Cre
ek
22
M04
5310
C
oron
a D
e O
ro M
ine
23
M04
S342
C
otto
n woo
d C
reek
24
M04
5294
C
raig
s C
reek
25
M04
52%
C
resc
ent C
ity B
each
M04
5259
D
evils
Gul
ch
M04
S331
D
ougl
as F
lat
26
MP0
0061
E
mm
a BeU
Min
e
27
M10
0460
Es
treU
aMin
e
28
M04
S34S
Fe
athe
r R
iver
D
istr
ict
29
M04
S26S
F
olso
m
M04
S272
Fo
rks
of S
alm
on
Sisk
iyou
Hum
bold
t Sh
asta
Shas
ta
Hum
bold
t
41°0
8'18
" 12
2°18
'59"
Pl
acer
Au-
PGE
41°1
2'05
" 40
°27'
14"
40°3
0'06
"
40°5
7'58
"
Del
Non
e
Trin
ity
Shas
ta,
Teha
ma
Del
Non
e
Del
Non
e
41°4
6'03
"
40°5
3'12
"
40°2
235"
41°4
7'42
"
41°4
438"
123°
39'4
6"
Plac
erA
u-PG
E12
2059
'02"
A
lask
anPG
E?
122°
26'0
2"
Plac
erA
u-PG
E
123°
3871
" Pl
acer
Au-
PGE
123°
59'4
9"
Plac
erA
u-PG
E
123°
31'4
8"
Plac
erA
u-PG
E
122°
17T
)r
Plac
erA
u-PG
E
123°
5734
" Pl
acer
Au-
PGE
124°
10'1
3"
Plac
erA
u-PG
E
119°
49'1
6"
Low
-sul
fide
Au-
quar
tz
vein
s?M
arip
osa
37°3
634"
Cal
aver
as
38°0
7'19
" 12
Q°2
7'22
lt Pl
acer
Au-
PGE
Sisk
iyou
41
°56'
03"
123°
0936
" Po
difo
rm c
hrom
ite
SanL
uis
35°2
2'41
" 12
0°42
'06"
Po
difo
rm c
hrom
ite
Obi
spo
But
te
39°2
T25"
12
1037
-01"
Pl
acer
Au-
PGE
Sacr
amen
to
38°3
6'43
" 12
1013
'11"
Pl
acer
Au-
PGE
Hum
bold
t 41
°223
3"
123°
2977
" Pl
acer
Au-
PGE
Day
and
Ric
hard
s, 1
906
PSF
C1,
1960
Sp
ence
r,
1971
L
ogan
, 19
19
Gra
y an
d ot
hers
, 19
86
Log
an,
1919
Cla
rk, 1
970a
Ir
win
, 19
60
Laiz
ure,
192
5b
PSF
C1,
196
0C
lark
, 19
70a,
b
Log
an,
1919
C
lark
, 197
0a
Log
an,
1919
C
lark
, 19
70b
Log
an,
1919
Cla
rk,
1970
a, b
Log
an,
1919
Cla
rk,
1970
aL
ogan
, 19
19O
'Bri
en,
1952
PSF
C1,
1960
Unp
ub. d
ata*
Wel
ls a
nd o
ther
s, 1
946
Bow
en a
nd G
ray,
195
7C
aste
llo,
1921
Lai
zure
, 19
28C
lark
, 197
0aC
lark
and
Lyd
on, 1
962
Day
and
Ric
hard
s, 1
906
Car
lson
and
oth
ers,
198
5W
ells
and
Cat
er, 1
950
Wel
ls a
nd o
ther
s, 1
949
Alie
n, 1
941b
Car
lson
and
oth
ers,
198
5Sm
ith a
nd G
rigg
s, 1
944
Wal
ker a
nd G
rigg
s, 1
953
Cla
rk, 1
970a
L
ogan
, 19
19
Mer
tie,
1969
C
arls
on, 1
955
Cla
rk,
1970
a, b
L
ogan
, 19
19
Log
an,
1919
$8.4
0Aon
Pt i
n bl
ack-
sand
con
cent
rate
s,
conc
entra
tion
fact
or n
ot k
now
n
Unv
erif
ied
repo
rt o
f PG
E
532
ppb
Pt, 5
43 p
pb P
d m
ax. i
n ro
ck
sam
ples
(fir
e as
say)
Smal
l byp
rodu
ct P
GE
pro
duct
ion
(abo
ut 3
.5
oz)
Unv
erif
ied
repo
rt o
f PG
E
Unv
erif
ied
bypr
oduc
t PG
E p
rodu
ctio
n
Smal
l byp
rodu
ct P
GE
pro
duct
ion
(a fe
wou
nces
) PG
M s
ampl
e co
ntai
ned
33%
Pt,
50%
fr,
17%
osm
iridi
um (
anal
ytic
al m
etho
dun
know
n)
Unv
erif
ied
bypr
oduc
t PG
E p
rodu
ctio
n
Smal
l byp
rodu
ct P
GE
prod
uctio
n (a
mou
nt
unkn
own)
Unv
erif
ied
repo
rt o
f PG
E
$10.
50/to
nPt
in b
lack
-san
d co
ncen
trat
es,
100
Ib o
f con
cent
rate
s fr
om 6
0 to
ns o
f gr
avel
(gr
ade
= ab
out 1
0 pp
b)69
ppb
Pt i
n ch
rom
itite
sam
ple
(fire
ass
ay)
12 p
pb P
d in
chr
omiti
te s
ampl
e (f
ire a
ssay
)
Prod
uced
abo
ut 1
,965
oz
PGE
Prod
uced
abo
ut 5
,000
oz
PGE
Unv
erif
ied
repo
rt o
f PG
E
* M
0453
34
Four
th o
f Jul
y C
laim
C
alav
eras
30
M04
5292
Fr
ench
Hill
D
elN
orte
31
M70
0422
Fr
ench
Hill
Chr
ome
Del
Nor
te
Min
e
32
W00
0377
Fr
iday
Min
e
33 35 36 37 38 39 40 41 42 43
M04
5290
G
eo. C
ook
Cla
ims
Del
Nor
te
M02
1683
G
erm
an B
ar
X02
5376
G
old
Cro
wn
34
M01
0775
G
rey
Cla
im
M04
5304
H
amm
er P
rope
rty
M04
S303
H
awki
nsB
ar
M04
S308
H
ende
rson
Min
e
M00
7280
H
ole
in th
e G
roun
d
M10
0203
H
olst
onM
ine
Nev
ada
Tula
re
M04
5260
H
uels
donk
Pla
cer
Mar
ipos
a W
02S2
9S
Iron
Mou
ntai
n M
ine
Shas
ta
M04
S332
Je
nny
Lind
C
alav
eras
M04
S324
Je
ssop
s G
ulch
Si
skiy
ou
38°1
4'22
" 12
0°51
'24"
Pl
acer
Au-
PGE
41°4
931"
12
3°58
'15"
Pl
acer
Au-
PGE
4104
8124
M 12
3°59
'09"
Po
ttifo
rm c
hrom
ite
San
Die
go
33°0
2'21
"11
6°33
'51"
Sy
noro
geni
c-sy
nvol
cani
c N
i-Cu
Seirr
a
Nap
a
Trin
ity
Trin
ity
Trin
ity
Del
Nor
te
3902
7.54
-
38°4
835"
40°5
3'26
"
40°5
2'14
"
40°5
3'41
"
4105
7'13
"
41°5
070"
12
4°01
30"
Plac
er A
u-PG
E
39°2
6'20
" 12
0°48
'58"
Lo
w-s
ulfid
eAu-
quar
tz
vein
s
120°
5031
" Lo
w-s
ulfid
eAu-
quar
tz
vein
s
122°
22'1
4"
Podi
form
chr
omite
37°3
6'54
" 40
°403
2"
38°0
575"
41°1
7'49
"
" Pl
acer
Au-
PGE
123°
31'1
3"
Plac
erA
u-PG
E
123°
33'4
8"
Plac
erA
u-PG
E
124°
00'4
0"
Podi
form
chr
omite
118°
57'1
0"
Podi
form
chr
omite
120°
20'5
6"
Plac
erA
u-PG
E 12
2°31
36"
Kur
oko
mas
sive
sulfi
de
120°
52'0
5"
Plac
erA
u-PG
E
123°
07'5
2"
Plac
erA
u-PG
E
Cla
rk a
nd L
ydon
, 19
62Lo
gan
and
Fran
ke, 1
936
Cat
er a
nd W
ells
, 195
3 C
lark
, 19
70a,
b
Log
an,
1919
O
'Bri
en,
1952
B
radl
ey a
nd o
ther
s, 19
18
Car
lson
and
oth
ers,
198
5 O
'Brie
n, 1
948,
1952
Sa
nbom
and
Ric
ker,
1948
U
npub
. dat
a*
Wel
ls a
nd o
ther
s, 19
46B
ilbre
y, 1
962
Cor
nwal
l, 19
66
Cre
asey
, 194
6 Er
ic, 1
948
Mer
riam
, 194
6 W
eber
, 196
3 U
npub
. da
ta
Cla
rk,
1970
a, b
L
ogan
, 19
19
O'B
rien
, 19
52A
veril
l, 19
42Fe
rgus
on a
nd G
anne
tt, 1
932
Loga
n, 1
941
McC
ullo
ch a
nd o
ther
s, 1%
4U
npub
. da
taFe
rgus
on a
nd G
anne
tt, 1
932
Mcc
ullo
ch a
nd o
ther
s, 19
64U
npub
. da
taA
verit
t,194
5C
arls
on a
nd o
ther
s,
1985
Dow
and
Tha
yer,
1946
Cla
rk, 1
970a
Log
an,
1919
Cla
rk, 1
970a
Log
an,
1919
Cla
rk, 1
970a
Log
an,
1919
Car
lson
and
oth
ers,
19
85O
'Brie
n, 1
952
Wel
ls a
nd o
ther
s, 19
46C
arls
on a
nd o
ther
s,
1985
Goo
dwin
, 195
8R
ynea
rson
, 194
8U
npub
. dat
a*B
owen
and
Gra
y,
1957
File
rs,
1913
Kin
kel a
nd A
lber
s, 19
51K
inke
l and
oth
ers,
1956
Unp
ub. d
ata
Cla
rk,
I970
a, b
Log
an,
1919
Cla
rk,
1970
a, b
Log
an,
1919
Unv
erifi
ed re
port
of P
GE
Smal
l byp
rodu
ct P
GE
prod
uctio
n (a
mou
nt
unkn
own)
18 p
pb P
d in
chr
omiti
te s
ampl
e (fi
xe a
ssay
)
310
ppb
Pd, 9
0 pp
b Pt
, 80
ppb
IT m
ax. i
n m
assi
ve su
lfide
sam
ples
(fire
ass
ay)
Smal
l byp
rodu
ct P
GE
prod
uctio
n (a
bout
2
oz)
Pt d
etec
ted
in n
ativ
e go
ld sa
mpl
e (f
ire a
ssay
, va
lue
not k
now
n)
60.7
ppm
Pt m
ax. d
etec
ted
in n
ativ
e go
ld
sam
ples
(fire
ass
ay)
124
ppb
Pt in
chr
omiti
te sa
mpl
e
Smal
l byp
rodu
ct P
GE
prod
uctio
n (a
bout
15
oz)
Unv
erifi
ed b
ypro
duct
PG
E pr
oduc
tion
Unv
erifi
ed b
ypro
duct
PG
E pr
oduc
tion
11 p
pb P
d in
chr
omiti
te sa
mpl
e (fi
xe a
ssay
)
76 p
pb P
t in
chro
miti
te sa
mpl
e (f
ire a
ssay
)
Unv
erifi
ed b
ypro
duct
PG
E pr
oduc
tion
PGE
repo
rted
in s
mel
ter r
etur
ns
Smal
l ^ *
duct
rG
" 4 ±
J"
iion
(am
ount
unkn
own)
Sm
all b
ypro
duct
PG
E pr
oduc
tion
(abo
ut 0
.5oz
)
Tabl
e 1.
Lis
t of p
latin
um-g
roup
-ele
men
t (PG
E) o
ccur
renc
es w
ithin
the
cont
erm
inou
s U
nite
d St
ates
that
are
con
tain
ed in
the
U.S
. Geo
logi
cal S
urve
y's
Min
eral
Res
ourc
e D
ata
Syst
em (
MR
DS
) C
onti
nued
Map
M
RD
S Pr
oper
ty n
ame
num
ber
reco
rd
num
ber
Cou
nty
Latit
ude
Long
itude
D
epos
it ty
pe(n
orth
) (w
est)
(Pub
lishe
d m
odel
nam
es
_____________________use
d w
here
app
licab
le)
Ref
eren
ces
cite
d in
MR
DS
reco
rds
Leve
l of P
GE
kno
wle
dge
Cal
ifor
nia
Con
tinue
d44
M
1005
88
Judy
Min
e D
elN
orte
45
M04
5300
Ju
nctio
n C
ity
Trin
ity
41°5
537"
12
3°58
'52"
Po
difo
rm c
hrom
ite
40°4
3'57
" 12
3°05
'48"
Pl
acer
Au-
PGE
46 47 48 49 50 51 52 53 54 55 56 * 57 58 59 60 61
W02
5616
M04
5312
M04
5276
M04
5309
M04
5327
M04
5262
M10
0312
M04
5302
M04
5268
M04
5298
M04
5307
M04
5285
M70
0413
M10
0179
M04
5301
M04
5267
M04
5318
Kan
garo
o M
ount
ain
Kin
gsbu
ry G
ulch
Kla
mat
h R
iver
Min
e
Koo
n R
anch
La
Gra
nge
La
Porte
Lat
onM
ine
Lew
isto
n
Linc
oln
Lin
dMin
e
Littl
e C
reek
Littl
e Riv
er
Lon
g L
edge
No.
3
Luck
y G
irl M
ine
Mac
into
sh M
ine
Mam
mot
h B
ar
Man
n an
d R
oss
Min
e
Sisk
iyou
Trin
ity
Hum
bold
t
Trin
ity
Stan
isla
us
Plum
as
Sono
ma
Trin
ity
Plac
er
Del
Nor
te
Trin
ity
Hum
bold
t
Fres
no
Stan
isla
us
Hum
bold
t
Plac
er
Sisk
iyou
41°5
5'16
"
40°3
0'31
"
41°1
2'02
"
40°5
2'51
"
3703
9.59
..
39°4
171"
38°3
7'11
"
40°4
4'45
"
38°5
4'04
"
41°4
8'22
M
40°3
5'09
"
41°0
1'40
"
36°5
2'10
"
37°2
4'08
"
40°5
6'42
"
38°5
5'14
"
41°2
531"
I23°
ll'2
6"
123°
08'4
0"
123°
39'4
0"
123°
36'0
7"
120°
28'1
0"
120°
58'5
7"
123°
07'5
0"
122°
4871
"
121°
1531
"
124°
01'1
6"
123°
1532
"
124°
04'0
8"
119°
17'1
6"
121°
25'1
0"
123°
37'4
5"
121°
00'1
6"
123°
30'0
8"
Podi
form
chr
omite
Plac
er A
u-PG
E
Plac
er A
u-PG
E
Plac
er A
u-PG
E
Plac
er A
u-PG
E
Plac
er A
u-PG
E
Podi
form
chr
omite
Plac
er A
u-PG
E
Plac
er A
u-PG
E
Plac
er A
u-PG
E
Plac
er A
u-PG
E
Plac
er A
u-PG
E
Podi
form
chr
omite
Podi
form
chr
omite
Plac
er A
u-PG
E
Plac
er A
u-PG
E
Plac
er A
u-PG
E
Car
lson
and
oth
ers,
198
5O
'Bri
en,
1952
Unp
ub. d
ata*
Wel
ls a
nd o
ther
s, 1
946
Ave
rill,
193
8, 1
941b
Cla
rk,
1970
3, b
Day
and
Ric
hard
s, 1
906
Spen
cer,
19
71C
arls
on a
nd o
ther
s, 1
985
Wel
ls a
nd C
ater
, 195
0W
ells
and
oth
ers,
194
9C
lark
, 19
70a,
bL
ogan
, 19
19Sp
ence
r,
1971
Lai
zure
, 192
5aL
ogan
, 19
19
Cla
rk, 1
970a
Log
an,
1919
Snet
sing
er,
1971
aC
lark
, 19
70a,
b
Log
an,
1919
Cla
rk, 1
970a
Day
and
Ric
hard
s, 1
906
Car
lson
and
oth
ers,
198
5D
ow a
nd T
haye
r, 19
46C
lark
, 19
70a,
bL
ogan
, 19
19C
lark
, 19
70a,
bL
ogan
, 193
6C
lark
, 19
70a,
bP
SFC
1, 1
960
Cla
rk, 1
970a
Log
an,
1919
Irw
in,
1960
PSF
C1,
196
0C
arls
on a
nd o
ther
s,
1985
Log
an a
nd o
ther
s, 1
951
Ryn
ears
on, 1
948
Car
lson
and
oth
ers,
198
5W
alke
r and
Grig
gs, 1
953
Cla
rk, 1
970a
Spen
cer,
19
71Sn
etsi
nger
, 19
71b
Log
an,
1919
, 19
27W
arin
g, 1
919
Log
an,
1919
10 p
pb P
d, 2
50 p
pb I
r, 41
0 pp
b R
u, 3
9 pp
b R
h in
chr
omiti
te s
ampl
e (f
ire a
ssay
)
Smal
l byp
rodu
ct P
GE
pro
duct
ion
(abo
ut 1
oz
/yr,
unkn
own
dura
tion)
130
ppb
Pt, 6
9 pp
b R
h in
chr
omiti
te s
ampl
e (f
ire a
ssay
)
Smal
l byp
rodu
ct P
GE
pro
duct
ion
(abo
ut 2
oz
)
PGM
gra
ins
aver
aged
26.
04%
Pt,
72.1
5%
Os+
fr, 1
.165
% A
u (a
naly
tical
met
hod
unkn
own)
Irid
osm
ine
iden
tifie
d by
ele
ctro
n m
icro
prob
e
Smal
l byp
rodu
ct P
GE
pro
duct
ion
(am
ount
unkn
own)
$1
9.80
/ton
Pt in
bla
ck-s
and
conc
entr
ates
,co
ncen
tratio
n fa
ctor
not
kno
wn
240
ppb
Ir, 5
70 p
pb R
u in
chr
omiti
te s
ampl
e(f
ire a
ssay
) U
nver
ified
byp
rodu
ct P
GE
pro
duct
ion
Unv
erifi
ed b
ypro
duct
PG
E p
rodu
ctio
n
Unv
erif
ied
bypr
oduc
t PG
E p
rodu
ctio
n
Vis
ual i
dent
ifica
tion
of P
GM
Unv
erif
ied
repo
rt o
f PG
E
80 p
pb P
t in
chro
miti
te s
ampl
e (f
ire a
ssay
)
13 p
pb P
d, 7
30 p
pb I
r, 51
0 pp
b R
u in
chro
miti
te s
ampl
e (f
ire a
ssay
) Er
lichm
anite
iden
tifie
d by
ele
ctro
nm
icro
prob
e
Smal
l byp
rodu
ct P
GE
pro
duct
ion
(am
ount
unkn
own)
Sm
all b
ypro
duct
PG
E p
rodu
ctio
n (a
mou
ntun
know
n)
* 62 63 64 65 66 * 67 68 * * 69 70 71 * * 72 73 74 75 * 76
M04
5326
M04
5271
M04
5320
M04
5313
M04
5333
M01
0725
M04
5273
M04
5291
M04
5295
M04
5258
M04
6848
M04
5322
M04
5343
M04
5321
X02
5318
M04
5279
M04
5269
M04
7042
W02
5722
M^4
5323
M04
5287
M04
5339
Men
doci
no M
inin
g &
M
illin
g C
o., I
nc.
Mic
higa
n B
ar
Mic
higa
n Sa
lmon
Min
ersv
ille
Mok
elum
ne R
iver
Moo
re M
ine
Mur
ray
Myr
tle C
reek
Pla
cer
Nel
s Chr
iste
nsen
Min
e
New
Yea
r Dig
ging
s
NI-
CA
L
Nig
gerh
ill H
ydra
ulic
M
ine
Nim
shew
Orc
utt H
ydra
ulic
Min
e
Orie
ntal
Orle
ans P
lace
r
Paci
fic G
old
Dre
dgin
g C
o.Pa
lo A
lto se
wag
e, sl
udge
Peg
Leg
Min
e
Pete
rson
Min
e
Pion
eer P
lace
r Min
ePl
atin
a
Men
doci
no
Sacr
amen
to
Sisk
iyou
Trin
ity
Cal
aver
as
Nap
a
Hum
bold
t
Del
Nor
te
Del
Nor
te
Mar
ipos
a
Del
Nor
te
Sisk
iyou
But
te
Sisk
iyou
Sier
ra
Hum
bold
t
Plac
er
Sant
a C
lara
Sisk
iyou
Sisk
iyou
Hum
bold
tSh
asta
38°5
7'50
"
38°2
932"
41°1
438"
40°4
9'41
"
38°1
3'59
"
38°4
7'51
"
41°2
1'45
"
41°4
8'06
"
41°4
7'49
"
37°3
6'48
"
4105
5I41
"
41°1
475"
39°5
033"
41°1
3<21
"
39°2
736"
41°1
736"
38°5
5'10
"
37°2
7'11
"
41°3
7'48
"
«01
6'13
"
41 "2
632"
40°2
137"
123°
04W
'
YlY
Tff
W
123°
1777
"
122°
46'0
7"
120°
57'5
9"
122°
2038
"
123°
29'4
5"
124°
03'1
5"
124°
03'0
1"
120°
21'1
9"
123°
58'4
4"
123°
16'4
8"
121°
37'1
3"
123°
14'5
5"
120°
51'2
8"
123°
33'1
2"
121°
00'2
7"
122°
0838
"
122°
4339
"
123°
0711
"
124°
03'4
4"12
2°53
'29"
Plac
er A
u-PG
E
Plac
er A
u-PG
E
Plac
er A
u-PG
E
Plac
er A
u-PG
E
Plac
er A
u-PG
E
Podi
form
chr
omite
Plac
er A
u-PG
E
Plac
er A
u-PG
E
Plac
er A
u-PG
E
Plac
er A
u-PG
E
Late
ritic
M
Plac
er A
u-PG
E
Plac
er A
u-PG
E
Plac
er A
u-PG
E
Low
-sul
fide A
u-qu
artz
ve
ins
Plac
er A
u-PG
E
Plac
er A
u-PG
E
Sew
age
slud
ge (n
o m
odel
)
Podi
form
chr
omite
Plac
er A
u PG
E
Plac
er A
u-PG
EPl
acer
Au-
PGE
Lai
zure
, 19
24
Log
an,
1919
O
'Bri
en,
1953
Cla
rk,
1970
a, b
L
ogan
, 19
19
Mer
tie,
1969
Cla
rk,
1970
a, b
L
ogan
, 19
19
O'B
rien
, 19
47C
lark
, 19
70a,
b
Cla
rk a
nd L
ydon
, 196
2 L
ogan
, 19
19,
1925
Car
ison
and
oth
ers,
198
5D
ow a
nd T
haye
r, 19
46
Ave
rill,
1941
a O
'Brie
n, 1
948
Cla
rk,
1970
a, b
L
ogan
, 19
19
O'B
rien
, 19
52C
lark
, 19
70a,
b
Log
an,
1919
Bow
en a
nd G
ray,
19
57U
npub
. dat
a*A
mer
ican
Met
al M
arke
t, 19
81
Nor
ther
n M
iner
, 197
7C
lark
, 19
70a,
b
Log
an,
1919
S
penc
er,
1971
Cla
rk, 1
970a
D
ay a
nd R
icha
rds,
190
6C
lark
, 19
70a,
b
Log
an,
1919
Ave
riU, 1
942
Ferg
uson
and
Gan
nett,
193
2 Lo
gan,
194
1 M
cCul
loch
and
oth
ers,
1964
U
npub
. da
taA
veril
l, 19
41a
Cra
wfo
rd, 1
894a
La
izur
e, 1
925b
Lo
weU
, 191
6L
ogan
, 19
19,
1927
Gul
bran
dsen
and
oth
ers,
197
8
Car
ison
and
oth
ers,
198
5W
ells
and
Cat
er, 1
950
CJa
rk,
19?9
a, b
L
ogan
, 19
19Ir
elan
, 18
88C
lark
, 19
70a,
b
Unv
erifi
ed re
port
of P
GE
Smal
l byp
rodu
ct P
GE
prod
uctio
n (1
2 oz
/yr,
unkn
own
dura
tion)
Smal
l byp
rodu
ct P
GE
prod
uctio
n (s
ever
al
ounc
es p
er y
ear,
unkn
own
dura
tion
Smal
l byp
rodu
ct P
GE
prod
uctio
n (a
mou
nt
unkn
own)
Pr
oduc
ed a
bout
480
oz
PGE
121
ppb
Pt,
128
ppb
Pd, 4
50 p
pb IT
, 1.6
7 pp
m R
u 38
ppb
Rh
in c
hrom
itite
sam
ple
Una
ble
to fi
nd s
ourc
e of
PG
E da
ta
Unv
erifi
ed b
ypro
duct
PG
E pr
oduc
tion
Unv
erifi
ed b
ypro
duct
PG
E pr
oduc
tion
Unv
erifi
ed re
port
of P
GE
Una
ble
to fi
nd s
ourc
e of
PG
E da
ta
Smal
l byp
rodu
ct P
GE
prod
uctio
n (a
mou
nt
unkn
own)
$51 O
Aon
Pt in
bla
ck-s
and
conc
entra
tes,
co
ncen
tratio
n fa
ctor
not
kno
wn
Smal
l byp
rodu
ct P
GE
prod
uctio
n (a
mou
nt
unkn
own)
86.4
ppm
Pt m
ax. d
etec
ted
in n
ativ
e go
ld
sam
ples
(fire
ass
ay)
Una
ble
to fi
nd s
ourc
e of
PG
E da
ta
Smal
l byp
rodu
ct P
GE
prod
uctio
n (a
few
ou
nces
per
yea
r, un
know
n du
ratio
n)4
ppm
Pd
in a
sh fr
om s
ewag
e tre
atm
ent
(sem
i-qua
ntita
tive
spec
trogr
aphy
)17
0 pp
b IT
, 650
ppb
Ru
in c
hrom
itite
sam
ple
(fire
ass
ay)
Unv
erifi
ed b
ypro
duct
PG
E -r
educ
tion
Unv
erifi
ed re
port
of P
GE
Unv
erifi
ed b
ypro
duct
PG
E pr
oduc
tion
Tabl
e 1.
Lis
t of p
latin
um-g
roup
-ele
men
t (PG
E) o
ccur
renc
es w
ithin
the
cont
erm
inou
s U
nite
d St
ates
that
are
con
tain
ed in
the
U.S
. Geo
logi
cal S
urve
y's
Min
eral
Res
ourc
e D
ata
Syst
em (
MR
DS
) C
onti
nued
Map
M
RD
S Pr
oper
ty n
ame
Cou
nty
Latit
ude
Long
itude
D
epos
it ty
penu
mbe
r re
cord
(n
orth
) (w
est)
(Pub
lishe
d m
odel
nam
esnu
mbe
r ___
__
__
___________________________use
d w
here
app
licab
le)
Ref
eren
ces c
ited
in M
RD
S re
cord
sL
evel
of P
GE
kno
wle
dge
Cal
ifor
nia
Con
tinue
d77 78 79 80 81 82 83 84 * 85 86 87 88 89 90 * 91
MP0
0055
Po
le C
orra
l
M04
6992
Pr
esto
n Pe
ak
Teha
ma
Sisk
iyou
40°1
771"
12
2°56
'42"
Po
difo
rm c
hrom
ite
MP0
0039
Pr
ospe
ct n
ear H
olst
on
Tula
reC
hrom
e M
0453
29
Puta
h C
reek
Y
olo
MP0
0062
Q
uest
a Pr
ospe
ct
M04
S264
R
elie
fllil
}
SanL
uis
Obi
spo
Nev
ada
M04
5341
R
oarin
g R
iver
M04
S263
R
ough
-and
-Rea
dy
W02
5377
Sa
ilor B
oy D
iggi
ngs
Sier
ra
Shas
ta,
Teha
ma
Nev
ada
M04
S274
Sa
lstro
m M
ine
Hum
bold
t
M04
S316
Se
iad
Sisk
iyou
W02
S614
Se
iad
Cre
ek
Sisk
iyou
W02
S6S4
Sh
ort B
end
and
Riv
er
Sisk
iyou
Ben
d Pl
acer
s M
04S2
89
Sisk
iyou
For
k D
elN
orte
M04
S328
Sn
effin
g
M00
7533
Su
nset
M04
S281
Su
rpur
Cre
ek
Ml 0
0580
Sw
eetw
ater
Min
e
Mer
ced
Del
Nor
te
Hum
bold
t
SanL
uis
Obi
spo
123°
37'1
4"
Unk
now
n
HS
^ST
S"
Podi
form
chr
omite
122°
0138
" Pl
acer
Au-
PGE
120°
3937
" Po
difo
rm c
hrom
ite
120°
5139
" Pl
acer
Au-
PGE
122°
31'2
8"
Plac
er A
u-PG
E
121°
0735
" Pl
acer
Au-
PGE
Plac
erA
u-PG
E
41°4
9'27
"
36S0
1'29
"
38°2
937"
35°2
1'54
"
39°2
1'41
"
40°2
3'42
"
39°1
3'57
"
39°3
2'16
"
41°1
732"
12
3°33
'42"
Pl
acer
Au-
PGE
41°5
0'07
" 12
3°11
'42"
Pl
acer
Au-
PGE
41
°543
5"
123°
0834
" Po
difo
rm c
hrom
ite
41°4
635"
12
3°19
'46"
Pl
acer
Au-
PGE
41°5
3'03
" 12
3°48
36"
Plac
erA
u-PG
E
37°3
0'54
" 12
0°23
'51"
Pl
acer
Au-
PGE
41°4
8'05
" 12
3°52
W"
Podi
form
chr
omite
41°2
1'5r
12
3°56
'47"
Pl
acer
Au-
PGE
35°2
5'05
" 12
0°45
'13"
Po
difo
rm c
hrom
ite
Car
lson
and
oth
ers,
198
5O
Bri
en,
1946
Wel
ls a
nd H
awke
s, 1
965
Snok
e an
d C
alk,
197
8
Car
lson
and
oth
ers,
198
5
Clar
k, 1
970a
L
ogan
, 19
19
Spen
cer,
19
71
Car
lson
and
oth
ers,
198
5
Cla
rk, 1
970a
Day
and
Ric
hard
s, 1
906
Log
an, 1
941
Ave
rill,
19
38
Cla
rk, 1
970a
Day
and
Ric
hard
s, 1
906
Clar
k, 1
970a
C
raw
ford
, 18
94b
Lind
gren
, 191
1 L
ogan
, 19
19
Cla
rk,
1970
a, b
Car
lson
and
oth
ers,
198
5W
eibe
lt an
d R
icke
r, 19
49
WeU
s an
d C
ater
, 195
0 W
ells
and
oth
ers,
194
9 A
verU
l, 19
35
Cla
rk, 1
970a
C
lark
, 19
70a,
b
Log
an,
1919
C
lark
, 19
70a,
b
Log
an,
1919
M
erti
e,
1969
Car
lson
and
oth
ers,
198
5O
-Brie
n, 1
952
Wel
ls a
nd o
ther
s, 1
946
Cla
rk, 1
970a
PSF
C1,
196
0A
lien,
194
1bB
radl
ey a
nd o
ther
s, 1
918
Car
lson
and
oth
ers,
198
5Sm
ith a
nd G
rigg
s, 1
944
Unp
ub. d
ata*
Wal
ker a
nd G
rigg
s, 1
953
2.53
ppm
Pt,
12 p
pb P
d, 2
.93
ppm
IT, 4
.93
ppm
Ru,
92
ppb
Rh
in c
hrom
itite
sam
ple
(fire
ass
ay)
10 p
pb P
t, 14
ppb
Pd,
5 p
pb R
h m
ax. i
n ro
ck sa
mpl
es (
fire
ass
ay)
76 p
pb P
t in
chro
miti
te sa
mpl
e (f
ire
assa
y)
Vis
ual i
dent
ifica
tion
of P
GM
80 p
pb P
t, 26
ppb
Rh
in c
hrom
itite
sam
ple
(fiie
ass
ay)
$106
.50A
on P
t in
blac
k-sa
nd c
once
ntra
tes,
9Ib
of c
once
ntra
tes
from
1 t
on o
f gra
vel
(gra
de =
abo
ut 5
50 p
pb)
Smal
l byp
rodu
ct P
GE
pro
duct
ion
(am
ount
unkn
own)
$1
5.60
/ton
Pt in
bla
ck-s
and
conc
entr
ates
,co
ncen
tratio
n fa
ctor
not
kno
wn
Unv
erif
ied
repo
rt o
f PG
E
Smal
l byp
rodu
ct P
GE
pro
duct
ion
(abo
ut 3
oz)
Unv
erif
ied
bypr
oduc
t PG
E p
rodu
ctio
n 12
0 pp
b Pt
, 34
ppb
Pd, m
ax. i
n ch
rom
itite
sam
ples
(fi
re a
ssay
)
Una
ble
to fi
nd s
ourc
e of
PG
E d
ata
Smal
l byp
rodu
ct P
GE
pro
duct
ion
(am
ount
unkn
own)
Sm
all b
ypro
duct
PG
E p
rodu
ctio
n (a
mou
ntun
know
n)
490
ppb
b in
chr
omiti
te s
ampl
e (f
ire
assa
y)
Unv
erif
ied
repo
rt o
f PG
E
170
ppb
fr, 4
00 p
pb R
u in
chr
omiti
te s
ampl
e
92
M00
7567
Ta
nger
ine
Del
Nor
te
41 °
5T2T
12
3°52
'59"
Po
difo
rm c
hrom
ite
93
M10
0231
T
edoc
Gro
up
Teha
ma
40°1
479"
12
2°54
'00"
Po
difo
rm c
hrom
ite
94
M04
5319
T
enE
yckM
ine
Sisk
iyou
41
°24'
11"
123°
30'1
0"
Plac
erA
u-PG
E
* M
0452
86
Tw
o St
ates
Min
ing
Co.
H
umbo
ldt
41°2
0'50
" 12
4°04
140"
Pl
acer
Au-
PGE
95 96 97 98 99
100
102
103
104
105
106
107
108
109
110
111
112
113
M04
5283
MP0
0070
MP0
0066
MP0
0063
MP0
0058
M
P000
56
MP0
0052
M
P000
51
MP0
0045
MP0
0044
MP0
0043
M
P000
42
MP0
0041
MP0
0040
M
P000
37
MP0
0261
M
0452
61
M04
5305
M00
5694
Uni
on G
old
Blu
ff
Min
ing
Co.
Unn
amed
pro
spec
t
Unn
amed
pro
spec
t
Unn
amed
pro
spec
t
Unn
amed
pro
spec
t U
nnam
ed p
rosp
ect
Unn
amed
pro
spec
t U
nnam
ed p
rosp
ect
Unn
amed
pro
spec
t
Unn
amed
pro
spec
t
Unn
amed
pro
spec
t U
nnam
ed p
rosp
ect
Unn
amed
pro
spec
t
Unn
amed
pro
spec
t U
nnam
ed p
rosp
ect
Unn
amed
pro
spec
t U
pper
Fea
ther
Val
dor D
redg
e
War
d an
d Ly
ons
Min
e
Hum
bold
t
Del
Nor
te
Del
Nor
te
Del
Nor
te
Del
Nor
te
Del
Nor
te
Del
Nor
te
Del
Nor
te
Del
Nor
te
Del
Nor
te
Del
Nor
te
Del
Nor
te
Stan
isla
us
Del
Nor
te
Del
Nor
te
Del
Nor
te
Plum
as
Trin
ity
Cal
aver
as
4102
3'22
"
4105
4'47
"
41°5
7'17
"
41°5
437"
41°5
6'44
" 41
°52'
41"
41°5
4'28
" 41
"S
e^"
41°5
4'55
"
41°5
4'43
"
41°5
333"
41
°413
1"
37°2
477"
41 "
SS
^"
41°5
4'43
lf
41°5
738"
40
°003
7"
40°4
5'56
"
SS'ie
TO
"
124°
04'1
0"
123°
53'5
0"
124°
00'4
4"
123°
5838
"
123°
5739
"
123°
5336
"
123°
57'4
0"
123°
58'1
4"
123°
53'5
7"
123°
54'0
1"
123°
51'5
0"
123°
5779
"
121°
25'1
3"
123°
5777
"
123°
54'0
r
123°
52'5
7"
12
ril3
4"
123°
05'4
3"
120°
4971
"
Plac
erA
u-PG
E
Podi
form
chr
omite
Podi
form
chr
omite
Podi
form
chr
omite
Podi
form
chr
omite
Po
difo
rm c
hrom
ite
Podi
form
chr
omite
Po
difo
rm c
hrom
ite
Podi
form
chr
omite
Podi
form
chr
omite
Podi
form
chr
omite
Po
difo
rm c
hrom
ite
Podi
form
chr
omite
Podi
form
chr
omite
Po
difo
rm c
hrom
ite
Podi
form
chr
omite
Pl
acer
Au-
PGE
Plac
erA
u-PG
E
Podi
form
chr
omite
Car
lson
and
oth
ers,
198
5C
ater
and
Wel
ls, 1
953
O'B
rien
, 19
52
Wel
ls a
nd o
ther
s, 1
946
Bra
dley
and
oth
ers,
191
8 C
arls
on a
nd o
ther
s,
1985
W
ells
and
Haw
kes,
196
5 L
ogan
, 19
19
Ave
rill,
1941
a C
lark
, 19
70a
Irw
in,
1960
PSF
C1,
19
60
Irei
an,
1888
P
SFC
1, 1
960
Snet
sing
er,
1972
C
arls
on a
nd o
ther
s, 1
985
Car
lson
and
oth
ers,
198
5
Car
lson
and
oth
ers,
198
5
Car
lson
and
oth
ers,
198
5 C
arls
on a
nd o
ther
s, 1
985
Car
lson
and
oth
ers,
198
5 C
arls
on a
nd o
ther
s, 1
985
Car
lson
and
oth
ers,
198
5
Car
lson
and
oth
ers,
198
5
Car
lson
and
oth
ers,
198
5 C
arls
on a
nd o
ther
s, 1
985
Car
lson
and
oth
ers,
198
5
Car
lson
and
oth
ers,
198
5 C
arls
on a
nd o
ther
s, 1
985
Car
lson
and
oth
ers,
198
5L
ogan
, 19
19M
urdo
ck a
nd W
ebb,
196
6da
rk, 1
970a
Log
an,
1919
Car
lson
and
oth
ers,
198
5C
ater
, 194
8 C
laik
and
Lyd
on, 1
962
Tur
ner,
1S04
U
npub
. dat
a*
260
ppb
Ir,
1.39
ppm
Ru,
45
ppb
Rh,
max
. in
chr
omiti
te s
ampl
es (
fire
assa
y)
1.06
ppm
Pt,
10 p
pb P
d, 8
50 p
pb I
r, 98
0 pp
b R
u, 4
1 pp
b R
h, m
ax. i
n ch
rom
itite
sa
mpl
es (
fire
assa
y)Sm
all b
ypro
duct
PG
E p
rodu
ctio
n (a
mou
nt
unkn
own)
Unv
erif
ied
repo
rt o
f PG
E
Osa
rsite
iden
tifie
d by
ele
ctro
n m
icro
prob
e
390
ppb
Pt, 2
80 p
pb Ir
, 410
ppb
Ru,
76
ppb
Rh
in c
hrom
itite
sam
ple
(fire
ass
ay)
67 p
pb P
t, 55
0 pp
b fr
, 910
ppb
Ru,
73
ppb
Rh
in c
hrom
itite
sam
ple
(fire
ass
ay)
73 p
pb P
t, 10
ppb
Pd,
30
ppb
Rh
inch
rom
itite
sam
ple
(fire
ass
ay)
12 p
pb P
d in
chr
omiti
te s
ampl
e (f
ire a
ssay
) 50
0 pp
b Pt
, 16
ppb
Pd,
43
ppb
Rh
inch
rom
itite
sam
ple
(fire
ass
ay)
12 p
pb P
d in
chr
omiti
te s
ampl
e (f
ire a
ssay
) 76
ppb
Pt,
850
ppb
Ir,
1.4
ppm
Ru,
61
ppb
Rh
in c
hrom
itite
sam
ple
(fire
ass
ay)
340
ppb
Pt, 2
80 p
pb Ir
, 350
ppb
Ru,
60
ppb
Rh
in c
hrom
itite
sam
ple
(fire
ass
ay)
280
ppb
Pt, 2
50 p
pb Ir
, 400
ppb
Ru,
40
ppb
Rh
in c
hrom
itite
sam
ple
(fire
ass
ay)
180
ppb
Ir in
chr
omiti
te s
ampl
e (f
ire a
ssay
)79
ppb
Pt,
11 p
pb P
d in
chr
omiti
te s
ampl
e (f
ire a
ssay
)30
0 pp
b fr
, 490
ppb
Ru,
39
ppb
Rh
inch
rom
itite
sam
ple
(fire
ass
ay)
27 p
pb R
h in
chr
omiti
te s
ampl
e (f
ire a
ssay
) 35
0 pp
b Pt
, 830
ppb
Ir,
1.13
ppm
Ru,
120
ppb
Rh
in c
hrom
itite
sam
ple
(fire
ass
ay)
320
ppb
Ru
in c
hrom
itite
sam
ple
(fire
ass
ay)
Smal
l byp
rodu
ct P
GE
pro
duct
ion
(12-
15oz
/yr,
unkn
own
dura
tion)
Smal
l byp
rodu
ct P
GE
pro
duct
ion;
larg
est
PGE
pro
duce
r in
coun
ty
330
ppb
Ir in
chr
omiti
te s
ampl
e (f
ire a
ssay
)
Tab
le 1
. Li
st o
f pla
tinum
-gro
up-e
lem
ent (
PGE)
occ
urre
nces
with
in th
e co
nter
min
ous
Uni
ted
Stat
es th
at a
re c
onta
ined
in th
e U
.S. G
eolo
gica
l Sur
vey'
s M
iner
al R
esou
rce
Dat
a Sy
stem
(M
RD
S) C
ontin
ued
Map
M
RD
S Pr
oper
ty n
ame
Cou
nty
Latit
ude
Long
itude
D
epos
it ty
penu
mbe
r re
cord
(n
orth
) (w
est)
(Pub
lishe
d m
odel
nam
esnu
mbe
r _
__
__
__
__
__
__
__
__
_ _
____use
d w
here
app
licab
le)
Ref
eren
ces c
ited
in M
RD
S re
cord
sLe
vel o
f PG
E k
now
ledg
e
Cal
ifor
nia
Con
tinue
d11
4 M
0452
77
Wei
tchp
ec B
ar
115
116
117
Hum
bold
t
Trin
ity
Hum
bold
t
M04
5330
Y
uba
Riv
er D
istr
ict
Yub
a
M10
0289
W
este
rn C
hrom
eN
os.
1,
3,
4 M
0087
34
Whi
te C
edar
41°1
1'09
" 12
3°42
79"
Plac
er A
u-PG
E
40°2
6'04
" 12
3°15
'55"
Po
difo
rm c
hrom
ite
41°2
3'01
" 12
3°46
'45"
Po
difo
rm c
hrom
ite
39°1
2'02
" 12
1°26
'12"
Pl
acer
Au-
PGE
Ave
rill,
1941
aC
lark
, 19
70b
Log
an,
1919
PSF
C1,
196
0P
age
and
othe
rs,
1973
Spen
cer,
19
71C
arls
on a
nd o
ther
s,
1985
Wel
ls a
nd H
awke
s, 1
965
Car
lson
and
oth
ers,
198
5W
ells
and
Haw
kes,
196
5C
lark
, 19
70a
E&
MJ2
,198
8L
ogan
, 19
19M
erti
e,
1969
NM
AN
3,19
76R
oman
owitz
, 1970___
__
_
Feno
plat
inum
, coo
peri
te, s
perr
ylite
, rho
dian
sp
erry
lite
iden
tifie
d by
ele
ctro
n m
icro
prob
e an
d x-
ray.
Sm
all b
ypro
duct
PG
E
prod
uctio
n
545
ppb
Pt, 1
10 p
pb P
d, 3
3 pp
b R
h in
ch
rom
itite
sam
ple
(fixe
ass
ay)
101
ppb
Pt in
chr
omiti
te s
ampl
e (fi
xe a
ssay
)
Prod
uced
abo
ut 6
,702
oz
PGE
Col
orad
oM
0453
47
Asp
en
M04
5348
B
uena
Vis
ta
Pitk
in
Cha
ffee
D01
0812
C
oppe
r H
ill M
ine
La
Plat
a
39°1
1'17
" 10
6°49
'04"
Pl
acer
Au-
PGE
?
38°5
174"
10
6°07
'55"
Pl
acer
Au-
PGE
37°2
4'01
" 10
8°04
'22"
Sy
enite
-hos
ted
Cu-
Ag-
PG
E (n
o m
odel
)
M04
5346
Ir
onH
mC
arbo
natit
e Sa
guac
he
W>
15'1
2"
107°
04'2
6"
Car
bona
tite
M04
5415
Ir
on H
ill P
lace
r Pa
rk
M04
5350
Li
berty
Sa
guac
he
D00
2811
M
ark
Thom
as
La
Plat
a
M04
5417
O
uray
O
uray
M04
5416
Ro
U C
all M
inin
g C
o.
Sagu
ache
M04
5349
Te
llurid
e Sa
nMig
uel
39°1
8'55
" 10
5°53
35"
Plac
erA
u-PG
E
37°5
1'13
" 10
5°33
'50"
Pl
acer
Au-
PGE
37°2
6'15
" 10
7°48
'17"
Pl
acer
Au-
PGE
38°0
138"
10
7°40
'22"
Pl
acer
Au-
PGE
38°1
4'56
" 10
5°56
'56"
U
nkno
wn
37°5
5I54
" 1Q
T>4T
2Q"
Plac
erA
u-PG
E
Day
and
Ric
hard
s, 1
906
Van
derw
ilt, 1
947
Day
and
Ric
hard
s, 1
906
Van
derw
ill, 1
947
Eck
el,
1938
, 19
49M
erti
e,
1969
Pag
e an
d ot
hers
, 19
73W
erle
and
oth
ers,
198
4L
arse
n, 1
942
Nas
h, 1
972
Tem
ple
and
Gro
gan,
196
5U
npub
. da
taK
unz,
19
18
Day
and
Ric
hard
s, 1
906
Van
derw
ill, 1
947
Unp
ub. d
ata*
Day
and
Ric
hard
s, 1
906
Van
derw
ilt, 1
947
Kun
z,
1918
Day
and
Ric
hard
s, 1
906
Van
derw
ill, 1
947
$1.5
0Aon
Pt i
n bl
ack-
sand
con
cent
rate
s, 6
00Ib
of c
once
ntra
tes
from
1 t
on g
rave
l (gr
ade
= ab
out 5
10 p
pb)
$12.
90/to
n Pt
in b
lack
-san
d co
ncen
trat
es, 2
7Ib
of c
once
ntra
tes f
rom
1 y
d3 g
rave
l (gr
ade
= ab
out 1
00 p
pb)
2.3
ppm
Pd,
3.9
ppm
Pt m
ax. i
n co
pper
-su
lfide
con
cent
rate
s (a
naly
tical
met
hod
unkn
own)
39 p
pb P
t in
rock
sam
ple
PGE
repo
rted
in a
urife
rous
gra
vel (
anal
ytic
al
met
hod
unkn
own)
$1 .S
OA
on P
t in
blac
k-sa
nd c
once
ntra
tes,
co
ncen
tratio
n fa
ctor
not
kno
wn
Una
ble
to fi
nd s
ourc
e of
PG
E d
ata
(pre
sum
ed to
be
unpu
b. d
ata)
A
ssay
but
ton
for g
old
yiel
ded
1 .1 8
% P
t,4.
51%
Os+
Ir (a
naly
tical
met
hod
unkn
own)
A
ssay
of o
re y
ield
ed 5
.09
oz/to
n Pt
$2.7
0/to
n Pt
in b
lack
-san
d co
ncen
trat
es, 1
Ib
of co
ncen
trate
d fr
om 3
yd3
gra
vel (
grad
e =
abou
t 0.3
ppb
)
__
__
__
__
__
__
__
__
__
__
__
__
__
___
__
__
__
__
__
__
__
__
_G
eo
rgia
M04
6993
H
abei
sham
Cou
nty.
H
abei
sham
34
°45'
00"
083°
30'0
0"
Plac
er A
u-PG
E oc
cune
nces
M04
6994
W
hite
Cou
nty
occu
nenc
esW
hite
34°4
0'00
" 08
3°4S
XX)"
Pl
acer
Au-
PGE
Hur
st a
nd C
raw
ford
, 19
64
Hur
st a
nd O
twel
l, 19
64
PGM
in st
ream
-sed
imen
t sam
ples
iden
tifie
d vi
sual
ly a
nd b
y x-
ray
diff
ract
ion,
co
ntam
inat
ion
from
sie
ving
(mat
eria
l lod
ged
in s
cree
ns fr
om a
pre
viou
s sm
aple
) pos
sibl
e PG
M in
stre
am-s
edim
ent s
ampl
es id
entif
ied
visu
ally
and
by
x-ra
y di
ffra
ctio
n,
cont
amin
atio
n fr
om s
ievi
ng (m
ater
ial l
odge
d in
scre
ens
from
a p
revi
ous
smap
le) p
ossi
ble
Idah
oW
0192
87
Bilk
Gul
ch P
lace
r
M04
5483
C
otto
nwoo
d
M04
5479
El
k C
ity D
istric
t
Bon
nevi
lle
43°0
675"
11
1°15
34"
Plac
er A
u-PG
E
Idah
o 46
°063
3"
lie^
lTS
" Lo
w-s
ulfid
e Au-
quar
tzve
ins
Idah
o 45
°48'
40"
115°
25'5
3"
Plac
er A
u-PG
E
M04
5484
Fr
ank
E W
ilson
Ran
ch
Ow
yhee
42
°553
2"
HS
^ST
?"
Plac
er A
u-PG
E
M04
5485
G
lenn
s Fer
ryEl
mor
e 42
°56'
45"
115°
17'4
7"
Plac
er A
u-PG
E
W02
7341
G
rand
Vie
w P
lace
r O
wyh
ee
42°5
9'04
" 11
6°04
'26"
Pl
acer
Au-
PGE
W01
3800
K
ing
Solo
mon
Pro
spec
t B
oise
43
°51'
49"
115°
46'1
0"
Low
-sul
fide A
u-qu
artz
vein
s?
M04
5480
Lu
cile
Bar
Pla
cer
Idah
o 45
°32'
04"
116°
1837
" Pl
acer
Au-
PGE
MP0
0068
M
inid
oka
Blai
ne
42°4
0'17
" 11
3°26
126"
Pl
acer
Au-
PGE
M04
5487
N
orth
For
k, C
lear
wat
er
Cle
arw
ater
46
°36'
55"
116°
1236
" Pl
acer
Au-
PGE
Riv
er
M04
5482
Pa
yette
Riv
erG
em43
°55'
54"
116°
16'5
8"
Plac
er A
u-PG
E
IDLI
S4,1
975*
Ros
s, 1
941
Sava
ge, 1
961b
Lind
gren
, 190
4R
oss,
194
1A
rmst
rong
and
Wei
ss, 1
957
Day
and
Ric
hard
s, 1
906
Flag
g, 1
913
Hub
bard
, 195
5Lo
rain
and
Met
zger
, 193
8R
eed,
193
4R
eid,
196
0R
oss,
194
1Sa
vage
, 196
1 aSt
aley
, 194
6H
ite,
1933
Mer
tie,
1969
Ros
s,
1941
Stal
ey, 1
946
Hit
e,
1933
Mer
tie,
1969
Ros
s,
1941
Stal
ey, 1
946
Fahr
enw
ald
and
othe
rs, 1
939
Hill
, 19
16R
oss,
19
41Sh
anno
n,
1922
Sore
nson
, 19
37St
aley
, 194
6R
oss,
194
1U
npub
. dat
a*D
ay a
nd R
icha
rds,
190
6H
ubba
rd, 1
955
Lora
in a
nd M
etzg
er, 1
938
Ros
s, 1
941
Hill
, 19
16Sh
anno
n,
1922
And
erso
n, 1
930
Day
and
Ric
hard
s, 1
906
Sava
ge, 1
96U
Stal
ey, 1
940
Day
and
Ric
hard
s, 1
906
Hub
bard
, 195
5 Sa
vage
, 196
1 c
Stal
ey, 1
946
Una
ble t
o fin
d so
urce
of P
GE
data
(pos
sibl
y 19
75 re
fere
nce)
Una
ble
to fi
nd s
ourc
e of
PG
E da
ta
$1.5
0/to
n Pt
in b
lack
-san
d co
ncen
trate
s, 1
4 Ib
of c
once
ntra
tes
from
1 to
n of
grav
el
(gra
de =
abo
ut 1
2 pp
b)
Mic
rosc
opic
iden
tific
atio
n of
PG
M in
bla
ck
sand
s and
qua
litat
ive c
hem
ical
test
was
po
sitiv
e fo
r PG
E (n
atur
e of
test
unk
now
n)
Mic
rosc
opic
iden
tific
atio
n of
PG
M in
bla
ck
sand
s and
qua
litat
ive
chem
ical
test
was
po
sitiv
e fo
r PG
E (n
atur
e of
test
unk
now
n)
Mic
rosc
opic
iden
tific
atio
n of
PG
M
Una
ble
to fi
nd s
ourc
e of
PG
E da
ta
(pre
sum
ed u
npub
. dat
a)$1
44A
on P
t in
blac
k-sa
nd c
once
ntra
tes,
co
ncen
tratio
n fa
ctor
not
kno
wn
Mic
rosc
opic
iden
tific
atio
n of
PG
M
$2.4
0Aon
Pt i
n bl
ack-
sand
con
cent
rate
s,
conc
entra
tion
fact
or u
nkno
wn
$8.4
0Aon
Pt i
n bl
ack-
sand
con
cent
rate
s, 7
0 Ib
of c
once
ntra
tes
from
Ito
n of
gra
vel
(gra
de =
abo
ut 3
40 p
pb)
Tabl
e 1.
List
of p
latin
um-g
roup
-ele
men
t (PG
E) o
ccur
renc
es w
ithin
the
cont
erm
inou
s Uni
ted
Stat
es th
at a
re co
ntai
ned
in th
e U
.S. G
eolo
gica
l Sur
vey'
s M
iner
al R
esou
rce
Dat
a Sy
stem
(M
RD
S) C
ontin
ued
Map
M
RDS
Prop
erty
nam
e C
ount
y La
titud
e Lo
ngitu
de
Dep
osit
type
num
ber
reco
rd
(nor
th)
(wes
t) (P
ublis
hed
mod
el n
ames
num
ber _
__
____
used
whe
re a
pplic
able
)
Ref
eren
ces c
ited
in M
RD
S re
cord
sLe
vel o
f PG
E kn
owle
dge
Idah
o C
ontin
ued
H-
*
00
M04
5477
Pi
erce
City
Dist
rict
Cle
arw
ater
46
°297
8"
115°
47'5
9"
Plac
er A
u-PG
E
M04
S488
R
ocky
Bar
Elm
ore
M04
S481
Sh
aw M
inin
g D
istri
ct
Ada
M04
5486
Ty
cesk
a G
old
Min
ing
Elm
ore
Co.
MP0
0245
U
nnam
ed Ja
sper
oid
Butte
occu
rren
ces
M04
S478
W
elch
Gro
und,
and
B
ingh
amG
old
Poin
t and
Eag
leB
end
And
erso
n, 1
930
Day
and
Ric
hard
s, 1
906
Ros
s, 1
941
Shan
non,
192
2 St
aley
, 194
6 B
alla
id, 1
928
Day
and
Ric
hard
s, 1
906
Ros
s, 1
941
Sava
ge, 1
961 a
St
aley
, 194
6 G
erry
, 191
2 Q
uiri
ng,
1962
R
oss,
194
1 St
aley
, 194
6 K
ite,
1933
M
ertie
, 19
69
Ros
s,
1941
St
aley
, 194
6 43
°50'
24"
113°
27'4
8"
Car
bona
te-h
oste
d A
u-A
g?
Soul
liere
and
oth
ers,
198
8
43°4
1'18
" 11
5°17
'18"
Pl
acer
Au-
PGE
43°3
5'51
" 11
6°02
'48"
Pl
acer
Au-
PGE
42°5
9'08
" 11
5°10
31"
Plac
erA
u-PG
E
43°1
2'17
" 11
2°21
'43"
Pl
acer
Au-
PGE
Day
and
Ric
hard
s, 1
906
Fahr
enw
ald
and
othe
rs, 1
939
Hill
, 19
16
Kite
, 19
33
Ros
s,
1941
Stal
ey, 1
946
$1.2
0Aon
Pt i
n bl
ack-
sand
con
cent
rate
s, 25
Ib
of c
once
ntra
tes
from
1 yd
3 of
grav
el
(gra
de =
abo
ut 9
ppb
)
$2.2
7Aon
Pt i
n bl
ack-
sand
con
cent
rate
s, 5
Ib
of co
ncen
trate
s fr
om 1
yd3
of gr
avel
(gra
de
= ab
out 3
ppb
)
Unv
erifi
ed re
port
of P
GE
Mic
rosc
opic
iden
tific
atio
n of
PG
M in
bla
ck
sand
s and
qua
litat
ive
chem
ical
test
was
po
sitiv
e fo
r PG
E (n
atur
e of
test
unk
now
n)
233-
384
ppb
Pt in
10
sam
ples
, 88
ppb
Pd in
1 sa
mpl
e fr
om d
ump
(fire
ass
ay)
$21 A
on P
t in
blac
k-sa
nd c
once
ntra
tes,
1.5
Ibof
conc
entra
tes
from
1 to
n of
taili
ngs (
grad
e=
abou
t 18
ppb)
Mai
ne*
MP0
0111
Nile
s B
rook
Oxf
ord
or
Fran
klin
45°O
OW
070°
42'4
9"Pl
acer
Au-
PGE
Boy
le, 1
979
Gau
thie
r an
d ot
hers
, 19
87
Gau
thie
r an
d T
rott
ier,
198
7N
owla
n an
d ot
hers
, 199
0
Unv
erifi
ed re
port
of P
GE
(198
7 re
fere
nces
be
lieve
d to
hav
e cite
d B
oyle
in e
rror
)
Mar
ylan
d1
M04
S424
Gly
ndon
Bal
timor
e39
°283
3"07
6°49
'04"
Plac
erA
u-PG
ED
ay a
nd R
icha
rds,
190
6 L
indg
ren,
19
12$.
19/to
n Pt
in g
rave
l (gr
ade
= ab
out 2
20
Ppb)
Min
neso
ta1 2
W01
8675
MP0
0113
Birc
h La
ke
Dun
kaPi
t
St. L
ouis
, La
keS
t Lo
uis
47°4
5'0r
47°4
3'15
"
091°
49'0
4"
091°
49'2
7"
Dul
uthC
u-N
i-PG
E
Dul
uthC
u-N
i-PG
E
Bon
nich
sen,
197
4 U
npub
. da
ta
Mor
ton
and
Hau
ck,
1987
30 ft
zon
e of
core
ave
rage
s >2
ppm
Pt+
Pd
(ana
lytic
al m
etho
d un
know
n)
Hig
h-gr
ade
sam
ple
cont
ains
10
ppb
Pt, 9
60
W01
8674
D
unka
Roa
dS
t Lo
uis
47°3
9'50
" 09
1°53
30"
Dul
uth
Cu-
Ni-P
GE
Unp
ub.
data
B
onni
chse
n, 1
972,
1974
C
oom
bes,
19
90
Foos
e an
d W
eiW
en, 1
986
Gee
rts
and
othe
rs,
1990
M
inin
g Jo
urna
l of
Lon
don,
198
9 M
orto
n an
d H
auck
, 19
87,
1989
R
iple
y, 1
981,
198
6a,
b U
npub
. da
ta
ppb
Pd (a
naly
tical
met
hod
unkn
own)
H
igh-
grad
e ar
ea co
ntai
ns a
s muc
h as
9.4
pp
m P
d, 2
.0 p
pm P
t, (a
naly
tical
met
hod
unkn
own)
. R
esou
rces
are
est
imat
ed a
t 185
m
illio
n to
ns a
t 0.0
04 o
z/to
n Pt
, 0.0
07
ozA
on P
d
W01
8671
M
atur
iLa
ke
M04
6S66
M
inna
max
Cu-
Ni
St L
ouis
Pro
spec
t
47°4
8'05
" W
l^S
TO
" D
ulut
h C
u-N
i-PG
E
47°3
7'54
" 09
1°52
'59"
D
ulut
h C
u-N
i-PG
E
M04
6425
Sp
ruce
Min
eLa
ke47
°49'
57"
091°
4038
" D
ulut
h C
u-N
i-PG
E
MP0
0114
W
ater
Hen
St
Lou
is47
°26'
05"
092°
0631
" D
ulut
h C
u-N
i-PG
E
Bon
nich
sen,
197
4G
rosh
and
oth
ers,
19S
SM
orto
n an
d H
auck
, 19
87Sc
hlut
er a
nd L
ands
trom
, 19
76Sc
hwar
tz a
nd D
avid
son,
195
2W
eibl
en,
1989
Bon
nich
sen,
197
4B
ouch
er,
1975
E&
MJ2
,197
6Fo
ose
and
Wei
blen
, 198
6M
orto
n an
d H
auck
, 19
87,
1989
Rip
ley,
19
86a
Seve
rson
, 19
91Se
vers
on a
nd B
arne
s, 1
991
Tyso
n an
d C
hang
, 198
4U
npub
. da
taW
eibl
en,
1989
Bon
nich
sen,
197
4B
onni
chse
n an
d Ty
son,
197
5*C
ornw
all,
1966
Foos
e an
d W
eibl
en, 1
986
Gro
sh a
nd o
ther
s, 1
955
Lis
teru
d an
d M
eine
ke,
1977
Mor
ton
and
Hau
ck,
1987
Rip
ley
and
Ala
wi,
1986
Wag
er a
nd o
ther
s, 1
969
Unp
ub.
data
Hau
ck a
nd B
arne
s, 1
989
Mor
ton
and
Hau
ck,
1987
Unp
ub.
data
___________
570
ppb
Pt+P
d in
ore
, wei
ghte
d av
erag
e (a
naly
tical
met
hod
unkn
own)
One
cor
e sa
mpl
e co
ntai
ns 1
4 pp
m P
t+Pd
ov
er 4
ft (a
naly
tical
met
hod
unkn
own)
651
ppb
Pt+P
d in
ore
, wei
ghte
d av
erag
e (a
naly
tical
met
hod
unkn
own)
One
sam
ple
cont
aine
d 1
ppm
Pt,
1 pp
m P
d (a
naly
tical
met
hod
unkn
own)
Mon
tana
1 2 3 4 5
SP00
188
M04
5427
MP0
0092
SP01
096
M06
0101
Ala
skite
Ant
elop
e-Po
ny D
istri
ct
Bay
Hor
se
Ben
bow
Cr-
Pt
Ben
bow
Min
e
Swee
t Gra
ss
Mad
ison
Sand
ers
Still
wat
er
Still
wat
er
45°2
6'18
"
45°4
034"
47°1
5'59
"
4502
r46"
45°2
1'52
"
110°
02'5
5"
11 l°
5T13
"
114°
2434
"
109°
48'5
9"
109°
48'2
2"
Oth
er P
GE
(mag
mat
icox
ide no
mod
el)
Wyo
min
g pr
ovin
cech
ronr
itite
(mag
mat
icox
ide no
mod
el)
Rev
ais
Cre
ek C
u-A
u-PG
E(n
o m
odel
)PG
E-en
riche
d st
ratif
orm
chro
miti
te (n
o m
odel
)B
ushv
eld
Cr
Cza
man
ske
and
othe
rs,
1991
Page
and
Buc
kley
,C
row
ley,
Zie
ntek
,
othe
rs,
1973
1992
1963
1993
Cza
man
ske
and
Zie
ntek
, 19
85
5.1
ppm
Pt,
3.4
ppm
Pd,
0.4
ppm
Rh
inbu
lk sa
mpl
e (f
ire a
ssay
)O
smiri
dium
iden
tifie
d by
X-r
ay d
iffr
actio
nor
ele
ctro
n m
icro
prob
e
0.21
oz/
ton
Pt+P
d in
gra
b sa
mpl
e (a
naly
tical
met
hon
unkn
own)
2.06
ppm
Pt+
Pd o
ver 2
ft, s
urfa
ce s
ampl
es(f
ire a
ssay
)33
0 pp
b Pt
, 270
ppb
Pd,
19
ppb
Rh
max
. in
6 SP
0108
1 B
enbo
w N
i-Cu
Still
wat
er
7 M
7004
34
Bla
kely
Clif
fs
Swee
t Gra
ss
8 SP
0109
1 B
litz
Still
wat
er
9 M
P001
06
Blu
e O
x M
ine
Sand
ers
45°2
137"
10
9°48
'49"
St
illw
ater
Ni-C
u
45°2
774"
11
(nO
W
Bus
hvel
d C
r
45°2
2'11
" 10
9°47
'23"
M
eren
sky
Ree
f PG
E
Jack
son,
196
8Pa
ge a
nd D
ohre
nwen
d, 1
973
Page
and
oth
ers,
196
9, 1
972
Peop
les
and
Row
land
, 19
40W
imm
ler,
1948
Zie
ntek
, 19
93Z
ient
ek,
1993
Cza
man
ske
and
Zie
ntek
, 19
85
Row
land
and
oth
ers,
1949
C
zam
ansk
e an
d Z
ient
ek,
1985
4701
6-29
" 11
4°24
'09"
R
evai
s C
reek
Cu-
Au-
PGE
C
row
ley,
196
3(n
o m
odel
) In
gers
oll
and
othe
rs,
1982
Van
Loe
nen
and
othe
rs,
1987
chro
miti
te sa
mpl
es (
fire
assa
y)
600
ppb
Pt, 9
2 pp
b Pd
, 4.5
ppb
Rh
in p
ulps
from
dril
l cor
e (f
ire a
ssay
) N
o pu
blis
hed
PGE
dat
a av
aila
ble
for m
isar
ea
No
publ
ishe
d PG
E d
ata
avai
labl
e fo
r thi
sar
ea
Sper
rylit
e id
entif
ied.
2.9
ppm
Pd,
1.2
ppm
Pt, 3
9 pp
b R
h m
axin
dik
e sa
mpl
e (fi
xe
Tabl
e 1.
Lis
t of p
latin
um-g
roup
-ele
men
t (PG
E) o
ccur
renc
es w
ithin
the
cont
enni
nous
Uni
ted
Stat
es th
at a
re c
onta
ined
in th
e U
.S. G
eolo
gica
l Sur
vey'
s M
iner
al R
esou
rce
Dat
a Sy
stem
(M
RD
S) C
ontin
ued
Map
M
RD
S Pr
oper
ty n
ame
Cou
nty
Latit
ude
Long
itude
D
epos
it ty
pe
num
ber
reco
rd
(nor
th)
(wes
t) (P
ublis
hed
mod
el n
ames
_____num
ber_
_______________________
__
__
__
__
__
__
__
use
d w
here
app
licab
le)
Ref
eren
ces c
ited
in M
RD
S re
cord
sLe
vel o
f PG
E k
now
ledg
e
Mon
tana
Con
tinue
d10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
M06
0093
B
lueb
ird
SP01
093
Blu
ebir
d C
r-P
t
MP0
0091
B
lueb
ird N
i-Cu
SP01
086
Bou
lder
Eas
t
SP01
077
Bou
lder
Riv
er N
i-Cu
(eas
t) M
0600
99
Bou
lder
Riv
er N
i-Cu
(Riv
ersi
de)
SP01
085
Bou
lder
Wes
t Sw
eet G
rass
SP01
097
Chr
ome
Lak
e C
r-P
t St
iUw
ater
SP01
082
Chr
ome
Lake
Ni-C
u St
iUw
ater
MP0
0098
C
hrom
e M
ount
ain
Ni-
Swee
t Gra
ss
Cu
SP01
024
Coo
rs
602
Swee
t Gra
ss
M04
5434
C
oppe
r K
ing
Min
e Pa
rk
Swee
t Gra
ss
45°2
3'19
" 10
9°57
'41"
B
ushv
eldC
r
Swee
t Gra
ss
Swee
t Gra
ss
Swee
t Gra
ss
Swee
t Gra
ss
Swee
t Gra
ss
4502
3-09
-
45°2
3'06
"
45°2
8'16
"
45°2
637"
45°2
8'23
"
109°
57'5
2"
1090
58'0
0"
110°
10'0
7"
110°
0930
"
1100
11'5
6"
PGE-
enric
hed
stra
tifor
m
chro
miti
te (n
o m
odel
) St
illw
ater
Ni-C
u
Mer
ensk
y R
eef P
GE
Still
wat
er N
i-Cu
Still
wat
er N
i-Cu
SP01
141
Cop
per Q
ueen
Park
MP0
0112
C
resc
ent
Cre
ek C
r-
Swee
t Gra
ss
Pt
MP0
0095
C
resc
ent C
reek
Ni-C
u Sw
eet G
rass
SP01
079
Cre
scen
t Pea
k N
i-Cu
Swee
t Gra
ss
SP01
090
Dow
Sw
eet G
rass
45°2
9'14
"
45°2
1W
45°2
1'06
"
45°2
6'02
"
45°2
6'04
"
45°0
7'23
"
45°1
7'15
"
45°2
3'15
"
45°2
3'09
"
45°2
337"
45°2
334"
Mer
cnsk
y R
eef P
GE
110°
12'0
3"
109°
47'4
4"
109°
47'4
8"
110°
07'1
8"
Still
wat
er N
i-Cu
PGE-
emic
hed
stra
tifor
m
chro
miti
te (n
o m
odel
) St
illw
ater
Ni-C
u
110°
0579
" D
isco
rdan
t PG
Em
iner
aliz
atio
n (n
o m
odel
) 10
9°54
'23"
Sy
enite
-hos
ted
Cu-
Ag-
PGE
(no
mod
el)
110°
34'5
6"
Unk
now
n
PGE-
enric
hed
stra
tifor
m
chro
miti
te (n
o m
odel
)
1100
01'1
0"
StiU
wat
er N
i-Cu
110°
01'5
7"
Still
wat
er N
i-Cu
Mer
ensk
y R
eef P
GE
Cza
man
ske
and
Zie
ntek
, 19
85P
age
and
othe
rs,
1969
Wim
mle
r, 19
48Z
ient
ek,
1993
Cza
man
ske
and
Zie
ntek
, 19
85
Cza
man
ske
and
Zie
ntek
, 19
85
Page
and
Nok
lebe
rg, 1
974
Pag
e an
d ot
hers
, 19
76
Cza
man
ske
and
Zie
ntek
, 19
85
Pag
e an
d ot
hers
, 19
76
Cza
man
ske
and
Zie
ntek
, 19
85Pa
ge,
1979
Ree
d, 1
950
Rob
y, 1
949
Cza
man
ske
and
Zie
ntek
, 19
85
Zie
ntek
, 19
93
Unp
ub.
data
Zie
ntek
, 19
93C
zam
ansk
e an
d Z
ient
ek,
1985
Page
and
Nok
lebe
rg, 1
974
Pag
e an
d ot
hers
, 19
76C
onn,
19
79
Lov
erin
g,
1930
Page
and
oth
ers,
197
3R
eed,
19
50Si
mon
s an
d ot
hers
, 197
3W
PA
MR
S5,
194
2St
otel
mey
er
and
othe
rs,
1983
Cza
man
ske
and
Zie
ntek
, 19
85
Page
and
Nok
lebe
rg, 1
974
Pag
e an
d ot
hers
, 19
69,
1972
C
zam
ansk
e an
d Z
ient
ek,
1985
Pa
ge a
nd N
okle
berg
, 197
4 Z
ient
ek,
1993
Cza
man
ske
and
Zie
ntek
, 19
85
460
ppb
Pt,
120
ppb
Pd, 3
10 p
pb R
h in
ch
rom
itite
sam
ples
(fir
e as
say)
No
publ
ishe
d PG
E d
ata
avai
labl
e fo
r tin
s ar
eaN
o pu
blis
hed
PGE
dat
a av
aila
ble
for t
his
area
No
publ
ishe
d PG
E d
ata
avai
labl
e fo
r thi
s ar
ea32
ppb
Pt,
48 p
pb P
d m
ax. i
n su
rfac
esa
mpl
es (
fire
assa
y)
No
publ
ishe
d PG
E d
ata
avai
labl
e fo
r thi
sar
ea
No
publ
ishe
d PG
E d
ata
avai
labl
e fo
r thi
s ar
ea3.
428
ppm
Pt+
Pd o
ver 4
.5 f
t, su
rfac
e sa
mpl
es (
fire
assa
y)52
ppb
Pt,
41 p
pb P
d, 2
.7 p
pb R
h in
pul
psof
dril
l cor
e (f
ire a
ssay
) 67
ppb
Pt,
130
ppb
Pd, 9
ppb
Rh
max
. in
surf
ace
sam
ples
(fix
e as
say)
4.4
ppm
Pt,
11 p
pm P
d ov
er 2
5 ft
inte
rval
(f
ire a
ssay
pre
sum
ed)
Smal
l PG
E p
rodu
ctio
n. N
umer
ous
anal
ytic
al re
sults
. G
rab
sam
ples
fro
m
stoc
kpile
ran
1.3
oz/to
n Pt
, 1.0
6 oz
/ton
Pd
max
. (an
alyt
ical
met
hod
unkn
own)
0.00
2 oz
/ton
Pt m
ax. i
n ch
ip s
ampl
es(a
naly
tical
met
hod
unkn
own)
64
0 pp
b Pt
, 1.5
ppm
Pd,
170
ppb
Rh
max
.in
chr
omiti
te sa
mpl
es
No
publ
ishe
d PG
E da
ta a
vaila
ble
for t
his
area
130 pp
b Pt, 18
0 ppb Pd, 13
ppb
Rh ma
x. in
^rili
cor
e sa
mpl
es (
fire
assa
y)
No
publ
ishe
d PG
E d
ata
avai
labl
e fo
r thi
sar
ea
26 27 28 29 30 31 32 33 34
W02
6S66
D
rake
Min
eSa
nder
s47
°15'
S7"
114°
24'1
8"
Rev
ais
Cre
ek C
u-A
u-PG
E B
uckl
ey,
1992
(no
mod
el)
35 36 37 38 39 40
M06
0092
Ea
st B
ould
er P
late
au
Swee
t Gra
ss
45°2
677"
11
0°07
'41"
B
ushv
eldC
r
M06
0091
Ea
st B
ould
er R
iver
- Sw
eet G
rass
C
hrom
e Que
en
M04
5432
El
dora
do B
ar
Lew
is a
ndC
lark
MP0
0100
Fi
shta
il C
reek
Ni-C
u St
illw
ater
MP0
0094
Fo
rge
Ni-C
u
SP01
087
Frog
Pon
d Ea
st
MP0
0101
Fr
og P
ond
Wes
t
M06
0088
G
ishM
ine
W00
7422
G
old
Coi
n M
ine
M70
0432
In
itial
Cr-
Pt
M06
0098
In
itial
Ni-C
u
Swee
t Gra
ss
Swee
t Gra
ss
Swee
t Gra
ss
Swee
t Gra
ss
45°2
539"
11
0°06
'10"
B
ushv
eldC
r
46°4
3'45
" 1H
°503
7"
Plac
er A
u-PG
E
45°2
0'25
" 10
9°45
'25"
St
iUw
ater
Ni-C
u
45°2
5'24
" 11
0°06
'15"
St
iUw
ater
Ni-C
u
45°2
6'50
" lU
rWW
M
eren
sky
Ree
f PG
E
45°2
7'16
" 11
0°08
'18"
M
eren
sky
Ree
f PG
E
45°2
839"
11
0°12
'08"
B
ushv
eldC
r
Dee
r Lod
ge
46°1
0'29
" 11
3°14
'41"
Po
lym
etal
lic v
eins
Swee
t Gra
ss
45°2
3'12
" 10
9°56
'44"
PG
E-em
iche
d st
ratif
orm
chro
miti
te (n
o m
odel
)
Swee
t Gra
ss
45°2
3'09
" 10
9°56
'53"
St
illw
ater
Ni-C
u
SP01
100
Iron
Mou
ntai
n-C
hrom
e Sw
eet G
rass
Gro
up (E
) M
7004
33
Iron
Mou
ntai
n-C
hrom
e Sw
eet G
rass
Gro
up (W
)
MP0
0099
Ir
on M
ount
ain
Ni-C
u Sw
eet G
rass
(C
amp)
SP01
078
Iron
Mou
ntai
n N
i-Cu
Swee
t Gra
ss
(Iro
n C
reek
)
4502
3.49
" no
°02i
OO"
Bus
hvel
dCr
45°2
4'28
" IK
yOSt
E"
Bus
hvel
dCr
45°2
430"
H
OW
W"
StiU
wat
er N
i-Cu
45°2
4'26
" 11
0°02
'45"
St
iUw
ater
Ni-C
u
Cro
wle
y,
1963
Har
riso
n an
d ot
hers
, 19
86In
gers
oll
and
othe
rs,
1982
Van
Loe
nen
and
othe
rs,
1987
Cza
man
ske
and
Zie
ntek
, 19
85R
owla
nd, 1
955
How
land
and
oth
ers,
1949
Page
and
oth
ers,
19
69,
1972
Wim
mle
r, 19
48C
zam
ansk
e an
d Z
ient
ek,
1985
How
land
, 195
5W
imm
ler,
1948
Mer
tie a
nd o
ther
s, 1
951
Cza
man
ske
and
Zie
ntek
, 19
85Pa
ge a
nd N
okle
berg
, 197
4C
zam
ansk
e an
d Z
ient
ek,
1985
Pa
ge a
nd N
okle
berg
, 197
4 Pa
ge a
nd o
ther
s, 1
976
Cza
man
ske
and
Zie
ntek
, 19
85
Cza
man
ske
and
Zie
ntek
, 19
85Se
gers
trom
and
Car
lson
, 198
2C
zam
ansk
e an
d Z
ient
ek,
1985
How
land
and
oth
ers,
1949
Page
and
oth
ers,
196
9Sc
hafe
r, 19
37W
imm
ler,
1948
Zie
ntek
, 19
93Ea
rll, 1
972
Em
mon
s an
d C
alki
ns,
1913
USG
S-U
SBM
6,19
05-1
962
Cza
man
ske
and
Zie
ntek
, 19
85Pa
ge a
nd o
ther
s,
1969
, 19
72W
imm
ler,
1948
Zie
ntek
, 19
93C
zam
ansk
e an
d Z
ient
ek,
1985
Page
, 197
9R
oby,
194
9C
zam
ansk
e an
d Z
ient
ek,
1985
Cza
man
ske
and
Zie
ntek
, 19
85H
owla
nd, 1
955
Page
and
oth
ers,
19
69,
1972
Scha
fer,
1937
Wim
mle
r, 19
48C
zam
ansk
e an
d Z
ient
ek,
1985
Page
and
Nok
lebe
rg, 1
974
Page
and
oth
ers,
197
6Z
ient
ek,
1993
Cza
man
ske
and
Zie
ntek
, 19
85Z
ient
ek,
1993
Abo
ut 9
00 o
z Pt
pro
duce
d
2.7
ppm
Pt,
5.76
ppm
Pd,
300
ppb
Rh
max
. in
chro
miti
te s
ampl
e (f
ire a
ssay
)
No
publ
ishe
d PG
E da
ta a
vaila
ble
for t
his
area
Abo
ut 1
60 o
z Pt
pro
duce
d
No
publ
ishe
d PG
E da
ta av
aila
ble
for t
his
area
62 p
pb P
t, 21
0 pp
b Pd
, 9 p
pb R
h m
ax. i
n su
rfac
e sa
mpl
es (f
ire a
ssay
)
No
publ
ishe
d PG
E da
ta a
vaila
ble
for t
his
area
N
o pu
blis
hed
PGE
data
ava
ilabl
e fo
r thi
sar
ea
Sam
ples
with
gre
ater
than
500
ppb
Pt+
Pdha
ve b
een
dete
rmin
ed (f
ire a
ssay
)
Unv
erifi
ed re
port
of P
GE
10.9
7 pp
m P
t+Pd
ove
r 1.2
ft, s
urfa
ce
sam
ple
(fire
ass
ay)
No
publ
ishe
d PG
E da
ta a
vaila
ble
for t
his
area
No
publ
ishe
d PG
E da
ta a
vaila
ble
for t
his
area
71
ppb
Pt,
270
ppb
Pd, 4
0 pp
b R
h in
chro
miti
te sa
mpl
e
530
ppb
Pt, 2
.9 p
pm P
d, 1
00 p
pb R
h m
ax.
in p
ulp
of d
rill c
ore
(Cam
p an
d Ir
on C
reek
co
mbi
ned,
fire
ass
ay)
530
ppb
Pt, 2
.9 p
pm P
d, 1
00 p
pb R
h m
ax.
in p
ulps
of d
rill c
ore
(Cam
p an
d Ir
on C
reek
co
mbi
ned,
fire
ass
ay)
TaM
e 1.
List
of p
latin
um-g
roup
-ele
men
t (PG
E) o
ccur
renc
es w
ithin
the
cont
erm
inou
s Uni
ted
Stat
es th
at a
re c
onta
ined
in th
e U
.S. G
eolo
gica
l Sur
vey'
s M
iner
al R
esou
rce
Dat
a Sy
stem
(M
RD
S) C
ontin
ued
Map
M
RDS
Prop
erty
nam
e C
ount
y La
titud
e Lo
ngitu
de
Dep
osit
type
num
ber
reco
rd
(nor
th)
(wes
t) (P
ublis
hed
mod
el n
ames
num
ber
__
_
__
_______________use
d w
here
app
licab
le)
Ref
eren
ces c
ited
in M
RD
S re
cord
sLe
vel o
f PG
E kn
owle
dge
Mon
tana
Con
tinue
d41 45 46 47 48 49
MP0
0096
Ja
net
50Sw
eet G
rass
42
MP0
0263
La
dy o
f the
Lak
e M
adis
onco
mpl
ex
* M
04S4
29
Littl
e G
old
Cre
ek P
lace
r G
rani
te
43
M06
0097
Li
ttle
Roc
ky C
reek
Ni-
StiU
wat
er
Cu
44
MP0
0105
Lu
cky
Strik
e M
ine
Sand
ers
SP01
207
Maj
estic
& F
lora
B
Swee
t Gra
ss
Cla
ims
D00
4063
M
ayflo
wer
Cla
im
Sand
ers
M04
5433
M
iles C
ityC
uste
r
Swee
t Gra
ss
Swee
t Gra
ss
MP0
0270
M
ouat
Ni-C
u (S
outh
) St
iUw
ater
MP0
0103
M
onke
y Ea
st (C
amp
Zone
) SP
0108
8 M
onke
y W
est
M06
0102
M
ouat
Ni-C
u(V
erde
gris
Cre
ek)
StiU
wat
er
45°2
5'03
" 11
0002
'55"
D
isco
rdan
t PG
E Z
ient
ek,
1993
min
eral
izat
ion
(mag
mat
icsu
lfid
e no
mod
el)
45°3
0'54
" 11
1°58
'03"
M
agm
atit
sulfi
de
Hor
n an
d ot
hers
, 19
91,
1992
segr
egat
ion
(no
mod
el)
46°2
4'48
" 11
3°07
'S8"
Pl
acer
Au-
PGE
Em
mon
s an
d C
alki
ns,
1913
Lyd
en,
1948
45°2
1'26
" 10
9°48
'17"
St
iUw
ater
Ni-C
u
47°1
6'14
" 11
4°24
'13'
45°3
032"
47°1
5'47
"
46°2
5'04
"
4502
5'06
"
45°2
5'55
"
110°
12'5
0"
1140
24'1
9"
105°
51'4
3"
110°
02'4
6"
110°
0434
"
Rev
ais
Cre
ek C
u-A
u-PG
E (n
o m
odel
)
Pick
et P
in m
iner
aliz
atio
n(n
o m
odel
) R
evai
s Cre
ek C
u-A
u-PG
E(n
o m
odel
) Pl
acer
Au-
PGE
Mer
ensk
y R
eef P
GE
Mer
ensk
y R
eef P
GE
45°2
237H
10
9°53
'57"
St
iUw
ater
Ni-C
u
45°2
2'48
" 10
9°53
'44"
St
iUw
ater
Ni-C
u
Cza
man
ske
and
Zie
ntek
, 19
85R
owla
nd a
nd o
ther
s, 19
36Pa
ge, 1
979
Pag
e an
d ot
hers
, 19
69,
1976
Rob
y, 1
949
Buc
kley
, 19
92C
row
ley,
19
63In
gers
oll
and
othe
rs,
1982
Law
son,
197
3V
an L
oene
n an
d ot
hers
, 19
87C
zam
ansk
e an
d Z
ient
ek,
1985
Cro
wle
y, 1
963
Unp
ub. d
ata1"
D
ay a
nd R
icha
rds,
1906
K
emp,
19
02C
zam
ansk
e an
d Z
ient
ek,
1985
Se
gers
trom
and
Car
lson
, 198
2 C
zam
ansk
e an
d Z
ient
ek,
1985
Atta
nasi
and
Baw
iec,
198
7P
age,
19
79Pa
ge a
nd o
ther
s, 19
85a,
198
5bPa
ge a
nd N
okle
berg
, 197
4Pr
emo
and
othe
rs, 1
990
Unp
ub.
data
Woo
den
and
othe
rs, 1
991
Zie
ntek
, 19
93Zi
ente
k an
d R
iple
y, 1
990
Zie
ntek
and
oth
ers,
198
6, 1
989
Cor
nwal
l, 19
66,1
973
Cza
man
ske
and
Zie
ntek
, 19
85H
owla
nd a
nd o
ther
s,
1936
Page
and
oth
ers,
19
69,
1976
Rob
y, 1
949
Unp
ub.
data
Zie
ntek
, 19
93Z
ient
ek a
nd o
ther
s, 1
986
692
ppb
Pt, 1
.278
ppm
Pd
avg.
, sur
face
sa
mpl
es (f
ire a
ssay
)
1.3
ppm
Au4
Pt+P
d m
ax. i
n su
lfide
-ric
hzo
nes
(ana
lytic
al m
etho
d un
know
n)
$1 A
on P
t in
blac
k sa
nd c
once
ntra
tes,
5 Ib
conc
entra
tes
from
1 to
n gr
avel
(gra
de =
abou
t 2 p
pb a
t $4S
/oz P
t) 19
0 pp
b Pt
, 18
ppb
Pd m
ax. i
n su
rfac
esa
mpl
es (f
ire a
ssay
)
3.2
ppm
Pt,
990
ppb
Pd, 6
2 pp
b R
h m
ax. i
n di
ke sa
mpl
es (f
ire a
ssay
)
No
publ
ishe
d PG
E da
ta a
vaila
ble
for t
his
area
Una
ble t
o fin
d so
urce
of P
GE
data
Unv
erifi
ed re
port
of P
GE
No
publ
ishe
d PG
E da
ta a
vaila
ble
for t
his
area
N
o pu
blis
hed
PGE
data
ava
ilabl
e fo
r thi
sar
ea96
0 pp
b Pt
, 410
ppb
Pd,
18
ppb
Rh
max
. in
drill
cor
e sa
mpl
es (s
outh
and
Ver
digr
is
Cre
ek c
ombi
ned,
fire
ass
ay)
960
ppb
Pt, 4
10 p
pb P
d, 1
8 pp
b R
h m
ax. i
dr
ill c
ore
sam
ples
(sou
th an
d V
erdi
gris
C
reek
com
bine
d, fi
re a
ssay
)
in
50M
0601
00
Mou
at-S
amps
on M
ine
StiU
wat
er
45°2
3'15
" 10
9°54
21"
Bus
hvel
dCr
to OJ
51 52 53 54 56 57 58 * 59 60 D 61 62 * 63
SP01
094
Mou
ntai
n V
iew
Cr-
St
iUw
ater
P
t45
°22'
56"
109°
53'5
7"
SP01
229
Nic
onPa
rk
M06
0095
N
ye B
asin
(A
lice)
St
iUw
ater
C
r-P
tM
0600
%
Nye
Bas
in (B
ig S
even
) St
iUw
ater
45°2
9'09
"
45°2
2'54
"
45°2
272"
110°
137r
109°
50'5
0"
109°
49'0
9"
PGE
-enr
iche
d st
ratif
orm
ch
rom
itite
(no
mod
el)
StiU
wat
er N
i-Cu
PGE
-enr
iche
d st
ratif
orm
ch
rom
itite
(no
mod
el)
Bus
hvel
dCr
55
M06
0086
N
ye B
asin
(Lip
)St
iUw
ater
SP01
095
Nye
Bas
in
Cr-
Pt
StiU
wat
er
MP0
0097
N
ye B
asin
Ni-C
u (e
ast)
StiU
wat
er
SP01
080
Nye
Bas
in N
i-Cu
(Lip
) St
iUw
ater
D00
4065
Pa
y R
ock
Min
e Sa
nder
s
MP0
0090
P
icke
t P
in
Swee
t Gra
ss
M04
5428
Pr
ince
ton
Gul
ch P
lace
r G
rani
te
45°2
2'51
" 10
9°51
'27"
B
ushv
eldC
r
45°2
2'11
" 10
9°49
'20"
PG
E-e
nric
hed
stra
tifor
mch
rom
itite
(no
mod
el)
45°2
2f27
" 10
9°50
'05"
St
iUw
ater
Ni-C
u
45°2
2'44
" 10
9°S
1W
StiU
wat
er N
i-Cu
47°1
5'57
" 11
4°24
'18"
R
evai
s C
reek
Cu-
Au-
PGE
(no
mod
el)
45°2
6'58
" H
O'O
S'O
l"
Pick
et P
in m
iner
aliz
atio
n(n
o m
odel
)
46°2
5'17
" 11
3°09
'49"
Pl
acer
Au-
PGE
M04
5489
S
till
wat
er
Com
plex
St
iUw
ater
, 45
°25'
00"
Swee
t Gra
ss,
Park
110°
00'0
0"M
eren
skyR
eefP
GE
, St
iUw
ater
Ni-C
u,
Bus
hvel
d C
r, ot
her
occu
rren
ces
with
no
publ
ishe
d m
odel
s
MP0
0087
S
till
wat
er M
ine
SP01
084
Teca
te
M04
5426
Tr
oy a
rea
StiU
wat
er
45°2
3'20
" 10
9°52
'16"
M
eren
skyR
eefP
GE
Park
Linc
oln
M04
6539
W
arm
Spr
ings
Gul
ch
Jeff
erso
n Pl
acer
45°2
9'41
"
48°2
732"
46°2
7'02
"
110°
14'0
5"
115°
52'5
6"
111°
59'0
7"
Mer
ensk
yRee
fPG
E
Unk
now
n
Plac
erA
u-PG
E
Cza
man
ske
and
Zie
ntek
, 19
85
Jack
son,
196
8P
age
and
Doh
renw
end,
19
73
Pag
e an
d ot
hers
, 19
69,
1972
Pe
ople
s an
d H
owla
nd, 1
940
Wim
mle
r, 19
48
Zie
ntek
, 19
93
Zie
ntek
, 19
93
Pag
e an
d ot
hers
, 19
76
Cza
man
ske
and
Zie
ntek
, 19
85W
imm
ler,
1948
Cza
man
ske
and
Zie
ntek
, 19
85Pe
ople
s an
d H
owla
nd, 1
940
Scha
fer,
1937
Wim
mle
r, 19
48C
zam
ansk
e an
d Z
ient
ek,
1985
Pag
e an
d ot
hers
, 19
69,
1972
Wim
mle
r, 19
48Z
ient
ek,
1993
Cza
man
ske
and
Zie
ntek
, 19
85
Page
and
Nok
lebe
rg,
1974
Z
ient
ek,
1993
C
zam
ansk
e an
d Z
ient
ek,
1985
Har
riso
n an
d ot
hers
, 19
86U
npub
. dat
a*B
oudr
eau
and
McC
allu
m,
1986
Cza
man
ske
and
Zie
ntek
, 19
85H
owla
nd a
nd o
ther
s,
1936
Day
and
Ric
hard
s, 1
906
Din
gman
, 193
2E
mm
ons
and
Cal
kins
, 19
13G
each
and
Che
lini,
1963
Lyd
en,
1948
Cab
ri a
nd L
aFla
mm
e, 1
974
Cab
ri a
nd o
ther
s, 1
975
Cza
man
ske
and
Zien
tek,
198
5E
&M
J2,
1975
Page
an
d D
orhe
nwen
d,
1973
P
age
and
Nok
lebe
rg,
1974
P
age
and
othe
rs,
1969
, 19
72,
1976
U
.S.
Geo
logi
cal
Sur
vey,
19
71
Bow
and
oth
ers,
19
82
Cza
man
ske
and
Zie
ntek
, 19
85
Tod
d an
d ot
hers
, 19
82
Cza
man
ske
and
Zie
ntek
, 19
85
Lyd
en, 1
948
Row
e,
1928
E&
MJ2
, 19
07L
yden
, 19
48
Coo
perit
e, la
urite
, Pl-
Fe a
Uoy
iden
tifie
d.
450
ppb
Pt, 2
.3 p
pm P
d, 1
60 p
pb R
h m
ax.
in c
hrom
itite
sam
ples
(fir
e as
say)
11.3
ppm
Pt+
Pd o
ver
6 in
., 6.
17 p
pm
Pt+P
d ov
er 4
in.,
surf
ace
sam
ples
(fi
re
assa
y)17
0 pp
b Pt
, 470
ppb
Pd,
32
ppb
Rh
max
. in
surf
ace
sam
ples
(fir
e as
say)
No
publ
ishe
d PG
E d
ata
avai
labl
e fo
r thi
s ar
eaN
o pu
blis
hed
PGE
dat
a av
aila
ble
for t
his
area
110
ppb
Pt, 8
9 pp
b Pd
, 100
ppb
Rh
max
. in
chro
miti
te sa
mpl
es (
fire
assa
y)
Surf
ace
sam
ples
exc
eed
500
ppb
Pt+P
d (f
ireas
say)
48
0 pp
b Pt
, 210
ppb
Pd
in fl
otat
ion
conc
entra
te fr
om d
rill c
ore
(fire
ass
ay)
No
publ
ishe
d PG
E d
ata
avai
labl
e fo
r thi
s ar
ea
Unv
erif
ied
repo
rt o
f PG
E
1.4
ppm
fr,
35 p
pm P
t, 44
ppm
Pd
in
sulfi
de-r
ich
sam
ple
$1.5
0/to
n Pt
in c
once
ntra
tes,
con
cent
ratio
n fa
ctor
not
kno
wn
Onl
y pr
oduc
er o
f PG
E a
s pr
imar
y co
mm
odity
in th
e co
nter
min
ous
U.S
.
Onl
y pr
oduc
er o
f PG
E a
s pr
imar
y co
mm
odity
in th
e co
nter
min
ous
U.S
.
No
publ
ishe
d PG
E d
ata
avai
labl
e fo
r thi
s ar
ea
Unv
erif
ied
repo
rt o
f PG
E
Ass
ays
gave
$4-
18A
on P
t in
gold
ore
(a
naly
tical
met
hod
unkn
own)
Tabl
e 1.
Lis
t of p
latin
um-g
roup
-ele
men
t (PG
E) o
ccur
renc
es w
ithin
the
cont
erm
inou
s U
nite
d St
ates
that
are
con
tain
ed in
the
U.S
. Geo
logi
cal S
urve
y's
Min
eral
Res
ourc
e D
ata
Syst
em (
MR
DS
) C
onti
nued
Map
M
RD
S Pr
oper
ty n
ame
num
ber
reco
rd
num
ber
Cou
nty
Latit
ude
Long
itude
D
epos
it ty
pe(n
orth
) (w
est)
(Pub
lishe
d m
odel
nam
es___
__
__
__
__
use
d w
here
app
licab
le)
Ref
eren
ces c
ited
in M
RD
S re
cord
sL
evel
of P
GE
kno
wle
dge
Mon
tana
Con
tinue
d64
SP
0109
2 W
est
For
k C
r-P
t (T
uttl
e)
65
MP0
0102
W
est F
ork
Eas
t (ad
it)
66
M06
0089
W
est F
ork
G (T
aylo
r-
Fry)
67
SP01
089
Wes
t For
k W
est
* M
P000
93
Whi
te C
loud
Swee
t Gra
ss
45°2
2'54
"11
0°00
34"
PGE
-enr
iche
d st
ratif
orm
ch
rom
itite
(no
mod
el)
Swee
t Gra
ss
Swee
t Gra
ss
Swee
t Gra
ss
Sand
ers
4S°2
3'56
" 10
9°S8
'05"
M
eien
sky
Ree
f PG
E
45°2
2'57
" 11
0°00
'16"
B
ushv
eldC
r
45°2
4'16
" 11
0°00
>22"
M
eren
sky
Ree
f PG
E
47°1
6'04
" 11
4°24
'40t
lR
evai
s C
reek
Cu-
Au-
PGE
(n
o m
odel
)
Zie
ntek
, 19
93
Cza
man
ske
and
Zie
ntek
, 19
85
Sege
rstr
om a
nd C
arls
on, 1
982
Cza
man
ske
and
Zie
ntek
, 19
85H
owla
nd,
1955
Pag
e an
d ot
hers
, 19
69,
1972
Scha
fer,
1937
Wim
mle
r, 19
48C
zam
ansk
e an
d Z
ient
ek,
1985
Cro
wle
y,
1963
Dril
ling
indi
cate
s 3.
8 m
illio
n to
ns a
t 0.0
2 oz
/ton
Pt a
nd 0
.05
oz/to
n Pd
ove
r 4-f
t th
ickn
ess
No
publ
ishe
d PG
E d
ata
avai
labl
e fo
r thi
sar
eaA
naly
tical
dat
a of
8 p
pm P
t, 11
ppm
Pd,
1.7
pp
m R
h m
ax. i
n ch
rom
itite
s sa
mpl
es (
fire
No
publ
ishe
d PG
E d
ata
avai
labl
e fo
r thi
s ar
eaU
nver
ifie
d re
port
of P
GE
Nev
ada
M03
1094
A
zuri
teM
ine
M24
2261
B
.C.H
. M
iner
als
Co.
Pr
oper
ty
M24
2242
B
oss
Min
e
Cla
rk
Esm
eral
da
Cla
rk
3504
934-
38°0
133"
35°4
9'10
"
1i5°
3337
tt Po
lym
etaU
ic re
plac
emen
t
Com
stoc
k ep
ither
mal
ve
ins?
115°
34'1
1"
Poly
met
allic
repl
acem
ent
* M
2341
45
Cop
per C
anyo
n op
en
pit M
ine
3 M
P002
64
Cot
ton w
ood
Caj
iyon
ar
ea4
M06
0449
Fo
rd M
ine
M23
2265
G
ibel
lini
Man
gane
se M
ine
Lan
der
40°3
3'20
ttII
TQTO
O"
Porp
hyry
Cu,
ska
m
rela
ted
Chu
rchi
ll39
°473
1"
118°
08'4
1"
Unk
now
n
40°0
4'05
" 11
80ir
52"
Unk
now
n
Hew
ett,
1931
K
nopf
, 19
15L
ongw
ell a
nd o
ther
s, 1
965
Alb
ers
and
Stew
art,
1972
K
nopf
, 19
21
Unp
ub. d
ata*
Bea
U96
3C
ram
pton
, 19
16H
ewet
t, 19
31K
enne
dy,
1915
Kno
pf,
1915
Lec
hler
and
Hsu
, 19
88L
ind
and
othe
rs,
1923
Lon
gwel
l an
d ot
hers
, 19
65M
udd,
19
15U
npub
. dat
a1"B
lake
and
oth
ers,
1978
Nas
h an
d Th
eodo
re, 1
971
Page
and
oth
ers,
197
8R
ober
ts a
nd A
rnol
d, 1
965
Saye
rs a
nd o
ther
s, 1
967
Stag
er,
1977
The
odor
e an
d B
lake
, 19
75,
1978
Unp
ub.
data
Unv
erif
ied
repo
rt o
f 0.0
2 oz
/ton
PGE
in
jaro
site
(ana
lytic
al m
etho
d un
know
n)
Una
ble
to fi
nd s
ourc
e of
PG
E d
ata
Prod
uced
abo
ut 1
,268
oz
Pt+P
d
Eur
eka
39°1
230"
John
son,
197
7 M
oore
, 197
1 be
eves
-rd
Xr
Unp
ub.
data
\\ff
OST
Or
PGE
-enr
iche
d bl
ack
shal
e B
inyo
n, 1
948
(no
mod
el)
1955
Cor
nwal
l, 19
66L
echl
er a
nd H
su,
1988
Lec
hler
and
oth
ers,
198
8R
ober
ts a
nd o
ther
s, 1
967
Unp
ub. d
ata*
20 p
pb P
d m
ax. i
n ro
ck sa
mpl
e; 1
0 pp
m P
d in
gol
d sa
mpl
e (f
ire
assa
y)
340
ppb
Pt, 9
30 p
pb P
d, 3
0 pp
b R
h in
roc
ksa
mpl
e (f
ire
assa
y)
69 p
pb P
t, 64
0 pp
bPd,
22
ppb
Rh
in ir
onor
e sa
mpl
e (f
ire a
ssay
)
626
ppbP
t, 45
ppb
Pd,
37
ppb
37 p
pb R
h in
m
il
MP0
0109
G
inge
rload
Cla
rk35
°28'
5r
115°
07'4
4"
Poly
met
affic
vei
ns
10
M04
5352
G
olde
n C
hario
t Min
e C
lark
M04
S3S4
G
reat
Eas
tern
C
lark
M23
4147
Ir
on C
anyo
n pl
acer
La
nder
M05
5460
K
dly
Min
es, I
nc.
Esm
exal
da
M04
S3SS
K
ey W
est
Cla
rk
M03
1297
Li
berty
Pit
M04
6S68
N
atom
as P
lace
rs
11
M04
S3S6
O
roA
mig
oMin
e
M04
66S7
R
obin
son
Dis
trict
Whi
te P
ine
Land
er
Cla
rk
M24
1736
Pl
atin
um-P
alla
dium
W
hite
Pin
e oc
curr
ence
Whi
te P
ine
35°5
0'16
"Po
lym
etaf
fic le
plac
emen
t
36°3
732"
11
4°08
'49"
M
agm
atic
sulfi
dese
greg
atio
n (n
o m
odel
)
40°3
2'57
" 11
7004
'57"
Pl
acer
Au-
PGE
yj°3
T25>
> n8
°013
1"
Unk
now
n"
114°
09'5
8"
Mag
mat
ic su
lfide
segr
egat
ion
(no
mod
el)
39°1
5'28
" 11
4°59
'52"
Po
rphy
ry C
u, s
kam
rela
ted
40°3
1'08
" 11
7°08
'13"
Pl
acer
Au-
PGE
35°5
0'44
" II
S^SX
E"
Poly
met
affic
lepl
acem
ent
114°
09'4
0"
Plac
erA
u-PG
E
39°1
5'24
" 11
4°59
'55"
Po
rphy
ry C
u, s
karn
re
late
d
Lec
hler
, 19
88
Lec
hler
and
Hsu
, 19
88
Hew
ett,
19
31Lo
ngw
ell a
nd o
ther
s, 19
65
Ban
crof
t, 19
10
Bea
U96
5 C
omw
aU, 1
966
Nee
dham
and
oth
ers,
1950
U
npub
. dat
a*Jo
hnso
n, 1
973a
Pag
e an
d ot
hers
, 19
78R
ober
ts a
nd A
rnol
d, 1
965
Stag
er, 1
977
The
odor
e an
d R
ober
ts,
1971
Van
derb
urg,
193
9U
npub
. da
taB
ancr
oft,
19
10B
eal,
1965
Bow
and
Lou
cks,
19
91C
omw
aU, 1
966
Lon
gwel
l an
d ot
hers
, 19
65N
eedh
am a
nd o
ther
s, 19
50U
npub
. dat
a*Sm
ith,
19
76
Hut
tl, 1
950
John
son,
197
3aR
ober
ts a
nd A
rnol
d, 1
965
Stag
er, 1
977
Theo
dore
and
Bla
ke, 1
975
Van
derb
urg,
193
9H
ewet
t,
1931
Kno
pf,
1915
Long
wel
l and
oth
ers,
1965
Bro
wn,
19
83Sm
ith, 1
976
Whi
tebr
ead
and
Bro
wn,
198
4Sm
ith,
19
76
659
ppb
Pt m
ax. i
n ro
ck sa
mpl
es (f
ireas
say)
. Ir
idos
min
e, fe
rrop
latin
umid
entif
ied
Unv
erifi
ed re
port
of 0
.5 o
z/to
n Pt
in C
u-be
arin
g or
e (a
naly
tical
met
hod
unkn
own)
0.
25 o
z/to
n Pt
max
. in
ore
sam
ples
(ana
lytic
al m
etho
d un
know
n)
2 pp
b Pd
in g
old
sam
ples
Unv
erifi
ed re
port
of P
GE
Smal
l byp
rodu
ct P
GE
prod
uctio
n (1
0 oz
Pt,
177
oz P
d).
PGE
cons
titut
e 25
-55
ppm
of
sulfi
de sa
mpl
es (a
naly
tical
met
hod
unkn
own)
Byp
rodu
ct P
GE
in s
mel
ter r
etur
ns (a
mou
nt
unkn
own)
U
nabl
e to
find
sour
ce o
f PG
E da
ta
Unv
erifi
ed re
port
of 0.
11 o
z/to
n Pt
max
. in
assa
ys o
f ore
mat
eria
l (an
alyt
ical
met
hod
unkn
own)
0.02
6 oz
/ton
Pt, 0
.054
oz/
ton
Pd m
ax. i
n pa
nned
con
cent
rate
sam
ples
(fir
e as
say)
Byp
rodu
ct P
GE
in s
mel
ter r
etur
ns (a
mou
nt
unknow
n)_
_______________
New
Jer
sey
MP0
0246
U
nnam
ed P
GE
oc
curr
ence
40°5
0'14
" 07
3°58
'55"
M
agm
atic
sulfi
dese
greg
atio
n (n
o m
odel
)G
ottf
ried
and
Fro
elic
h, 1
988
Got
tfri
ed a
nd o
ther
s, 1
989
35 p
pb P
t, 20
0 pp
b Pd
max
. in
rock
sam
ples
(f
ire a
ssay
)__
__
__
__
__
__
_N
ew M
exic
oM
0455
46
Jica
rilla
Gol
d Pl
acer
s Li
ncol
n
M04
5549
La
s Am
mas
Pla
cers
Si
erra
33°5
1'41
" 10
S°W
2r
Plac
erA
u-PG
E
3205
7'05
" 10
7°30
'05"
Pl
acer
Au-
PGE
Elli
s,
1929
Gri
swol
d, 1
959
John
son,
197
2b
Lind
gren
and
oth
ers,
1910
N
orth
rop,
19
59
Sege
rstr
om a
nd R
yber
g, 1
974
Har
ley,
193
4 Jo
hnso
n, 1
972b
Jo
nes,
19
04
Lind
gren
and
oth
ers,
1910
N
orth
rop,
19
59
Unv
erifi
ed re
port
of P
GE
Unv
erifi
ed re
port
of P
GE
Tabl
e 1.
List
of p
latin
um-g
roup
-ele
men
t (PG
E) o
ccur
renc
es w
ithin
the
cont
erm
inou
s Uni
ted
Stat
es th
at a
re c
onta
ined
in th
e U
.S. G
eolo
gica
l Sur
vey'
s M
iner
al R
esou
rce
Dat
a Sy
stem
(M
RD
S) C
ontin
ued
Map
M
RDS
Prop
erty
nam
e nu
mbe
r re
cord
nu
mbe
r
Cou
nty
Latit
ude
Long
itude
(n
orth
) (w
est)
Dep
osit
type
(P
ublis
hed
mod
el n
ames
us
ed w
here
app
licab
le)
Ref
eren
ces c
ited
in M
RDS
reco
rds
Leve
l of P
GE
know
ledg
e
New
Mex
ico C
ontin
ued
* M
0463
90
Orti
z ope
n pi
t Min
e
* M
0455
48
Red
Riv
er D
istric
t
1 D
0115
50
Sant
aRita
Min
e
* M
0455
45
Tam
pa M
ine
* M
0455
47
Teco
lote
Iron
Dis
trict
Sant
a Fe
35
°20'
10"
106°
09'0
1"
Taos
36
°42'
23"
105°
24'1
0"
Gra
nt
32°4
731"
10
8°03
'59"
Rio
Arr
iba
36°3
9'18
" 10
6°08
35"
Linc
oln
34°0
3'43
" 10
5041
'41"
Sado
epi
ther
mal
vei
ns?
Clim
ax M
o
Porp
hyry
Cu
Sado
epi
ther
mal
vei
ns?
Plac
er A
u-PG
E
Bac
hman
, 197
5 D
ale
and
McK
inne
y, 1
959
Elst
on, 1
967
Jone
s, 1
904
Lind
gren
and
oth
ers,
1910
M
cQui
ston
and
Sho
emak
er, 1
981*
N
orth
rop,
19
59
Ow
en a
nd C
ox,
1865
U
npub
. dat
a"1
Cla
rk a
nd R
ead,
197
2 Fa
in,
1910
Li
ndgr
en a
nd o
ther
s, 19
10
Park
and
McK
inla
y, 1
948
Ree
d, 1
922*
Sc
hilli
ng, 1
956,
196
0 U
npub
. dat
a"1
Ele
vato
rskl
, 19
83
Ellis
, 192
9 G
ibso
n an
d Tr
ujill
o, 1
966
Hut
d, 1
939
Jone
s, 1
904
Schi
lling
, 196
5 Sp
ence
r and
Pai
ge, 1
935
USG
S-U
SBM
5, 1
969,
197
0 U
npub
. dat
a"1
Bin
gler
, 196
8, 1
974
Jone
s,
1904
Li
ndgr
en a
nd o
ther
s, 19
10
Nor
thro
p,
1959
U
npub
. dat
a"1
Lind
gren
and
oth
ers,
1910
N
orth
rop,
19
59
Ass
ay g
ave
0.04
8 oz
Aon
Ir in
gol
d sa
mpl
e (a
naly
tical
met
hod
unkn
own)
Una
ble
to fi
nd s
ourc
e of
PG
E da
ta
Byp
rodu
ct P
GE
in s
mel
ter r
etur
ns (a
mou
nt
unkn
own)
Unv
erifi
ed re
port
of P
GE
Unv
erifi
ed re
port
of P
GE
New
Yor
k1
MP0
0110
Fo
nda
2 M
0454
21
Plat
tsbu
rg
Mon
tgom
ery
42°5
714"
07
4°22
122"
Clin
ton
44°4
1'41
" 07
3°26
'52"
Pt in
pyr
obitu
men
(no
mod
el)
Gla
cial
err
atic
(no
mod
el)
Par
nell
, 19
88
Kem
p,
1902
Pt id
entif
ied
as in
clus
ions
in p
yrob
itum
en b
y SE
M
Gla
cial
err
atic
(nug
get )
with
46%
PG
E an
d 54
% c
hrom
iteN
orth
Car
olin
a1
K00
1883
A
ddie
K00
1892
B
alsa
m G
ap
K00
1888
B
uck
Cre
ek
Jack
son
35°2
3'55
" 08
3°09
31"
Podi
form
chr
omile
Jack
son
35°2
532"
08
3°05
'44"
Po
difo
rm c
hrom
ite
Cla
y 35
°04'
56"
083°
37'0
3"
Podi
form
chr
omite
Hun
ter,
1941
Hun
ter a
nd o
ther
s, 1
942
Larr
abee
and
Sw
eene
y, 1
968
Lip
in,
1984
Mun
dock
and
Hum
ter,
1946
Hun
ter,
1941
Larr
abee
and
Sw
eene
y, 1
968
Lip
in,
1984
Hun
ter,
1941
Larr
abee
and
Sw
eene
y, 1
968
Lip
in,
1984
21 p
pb P
din
chro
mite
-bea
ring
duni
te s
ampl
e (f
ire a
ssay
)
10 p
pb P
d in
chr
omite
-bea
ring
duni
te sa
mpl
e (f
ire a
ssay
)
11 p
pb P
d in
chr
omite
-bea
ring
duni
te s
ampl
e (f
ire a
ssay
)
K00
1726
D
emoc
rat
Bun
com
be
35°4
7'09
" 08
2°29
'53"
Po
difo
nn c
hrom
ite
K00
1886
D
epos
it N
umbe
r 9
Mac
on
M04
5419
M
ason
s B
ranc
h M
acon
M04
S643
N
ed W
ilson
Bra
nch
Mac
on
" 08
3°16
37"
Podi
fonn
chr
omite
35°1
531"
08
3°22
'42"
Pl
acer
Au-
PGE
35°1
6'09
" 08
3°21
'51"
Pl
acer
Au-
PGE
Car
pent
er a
nd H
ale,
196
1H
unte
r, 19
41L
arra
bee
and
Swee
ney,
1%
8L
ipln
, 19
84C
onra
d an
d ot
hers
, 196
3H
unte
r, 19
41L
arra
bee
and
Swee
ney,
196
8L
ipln
, 19
84M
urdo
ck a
nd H
unte
r, 19
46C
ook
and
Bur
nell,
199
0H
idde
n an
d Pr
att,
1898
Kem
p,
1902
Unp
ub. d
ata"
1C
ook
and
Bur
nell,
199
0H
idde
n,
1898
Kem
p,
1902
M06
0562
A
nder
son
42°1
5'48
" 12
3°41
'23"
Pl
acer
Au-
PGE
M06
0639
A
das
Gol
d D
redg
ing
Jose
phin
e 42
°06'
48"
123°
32'2
3"
Plac
erA
u-PG
E
M06
0570
B
ear P
lace
r
M01
3716
B
enso
n Pl
acer
M06
1636
B
ig B
ear
M06
0783
B
ig F
our P
lace
r
M06
1005
B
ig S
unsh
ine
Jose
phin
e
Jose
phin
e
42°1
3'08
" 12
3°42
'45"
Pl
acer
Au-
PGE
42°3
875"
12
3°29
W
Plac
erA
u-PG
E
42°2
4tll
" 12
3°36
'29"
Po
difo
rm c
hrom
ite
Jose
phin
e 42
0301
5"
123°
29X
)7"
Plac
erA
u-PG
E
Car
lson
and
oth
ers,
198
5O
DG
MI7
, 194
1Th
ayer
, 19
40D
ay a
nd R
icha
rds,
190
6E
&M
J2,
191
6O
DG
MI7
, 19
52R
amp
and
Pete
rson
, 1 9
79B
rook
s an
d R
amp,
196
8M
inin
g W
orld
, 19
41O
DG
MI7
, 195
2R
amp
and
Pete
rson
, 197
9
OD
GM
I7, 1
952
Ram
p an
d Pe
ters
on, 1
979
OD
GM
I7,
1952
Ram
p an
d Pe
ters
on, 1
979
Page
and
oth
ers,
197
5R
amp,
196
1R
amp
and
Pete
rson
, 197
9U
npub
. dat
a"1
Dff
ler,
1914
Cur
ry42
°42'
56"
124°
18'2
0tl
Plac
erA
u-PG
E
Park
s an
d Sw
arde
y, 1
916
Ram
p an
d B
rook
s, 1
969
Ram
p an
d Pe
ters
on, 1
979
OD
GM
I7,
1940
Ram
p an
d ot
hers
, 197
7
12 p
pb P
d in
chr
omite
-bea
ring
dum
'te s
ampl
e (f
ire a
ssay
)
11 p
pb P
d in
chr
omite
-bea
ring
dura
'te s
ampl
e (f
ire a
ssay
)
Mic
rosc
opic
iden
tific
atio
n of
sper
rylit
e.
Pann
ed c
once
ntra
tes
in a
rea
cont
aine
d 20
0 pp
b Pt
max
. (ne
utro
n ac
tivat
ion)
Mic
rosc
opic
iden
tific
atio
n of
sper
rylit
e.
Pann
ed c
once
ntra
tes i
n ar
ea c
onta
ined
200
pp
b Pt
max
. (ne
utro
n ac
tivat
ion)
* 8
M04
5420
K00
1884
T.T.
Erw
in M
ine
Web
ster
Rut
herf
ord
Jack
son
3502
9'51
"
35°2
0'20
"
081°
55'0
8"
083°
12'5
8"
Plac
erA
u-PG
E
Podi
form
chr
omite
Kem
p,
1902
S
hepa
rd,
1847
Hun
ter,
1941
L
arra
bee
and
Swee
ney,
196
8 L
ipin
, 19
84
Unv
erif
ied
repo
rt o
f PG
E
39 p
pb P
din
chro
mite
-bea
ring
dum
'te s
ampl
e (f
ire a
ssay
)
Okl
ahom
a1 *
MP0
0104
D00
2888
Gle
n M
ount
ains
L
ayer
ed C
ompl
ex
Woo
druf
Farm
Kio
wa
Del
awar
e
34°4
9'24
"
36°1
5W
098°
59'1
0"
0940
43.5
7.-
Mag
mat
ic su
lfide
se
greg
atio
n (n
o m
odel
)
Unk
now
n
Coo
per,
19
86
Pow
ell,
1986
Unp
ub. d
ata1"
3.3
ppm
Pt,
1 .4
ppm
Pd
max
. in
rock
sa
mpl
es (
anal
yses
by
Bon
dar a
nd C
legg
an
d by
X-r
ay A
ssay
Lab
orat
orie
s)
Una
ble
to fi
nd s
ourc
e of
PG
E d
ata
Ore
gon
1M
0150
19A
jaxM
tne
Gra
nt44
021-
07"
118°
45'1
2"Po
difo
rm c
hrom
iteA
lien,
194
1 a21
ppb
Pd
in c
hrom
itite
sam
ple
(fire
ass
ay)
$323
.10/
ton
Pt in
con
cent
rate
s, 7
5 Ib
of
conc
entra
tes
per t
on o
f gra
vel (
grad
e =
abou
t 14
ppm
). Sm
all b
ypro
duct
PG
E
prod
uctio
n
Smal
l byp
rodu
ct P
GE
pro
duct
ion
(am
ount
un
know
n)
Una
ble
to fi
nd s
ourc
e of
PG
E d
ata
Unv
erif
ied
repo
rt o
f PG
E
PGE
bel
ow u
pper
10%
of v
alue
s fo
r ch
rom
itite
sam
ples
(fir
e as
say)
Smal
l byp
rodu
ct P
GE
pro
duct
ion
Unv
erif
ied
repo
rt o
f PG
E
Tabl
e 1.
Lis
t of p
latin
um-g
roup
-ele
men
t (PG
E) o
ccur
renc
es w
ithin
the
cont
erm
inou
s Uni
ted
Stat
es th
at a
re c
onta
ined
in th
e U
.S. G
eolo
gica
l Sur
vey'
s M
iner
al R
esou
rce
Dat
a Sy
stem
(M
RD
S)
Con
tinu
edM
ap
MR
DS
Prop
erty
nam
e C
ount
y La
titud
e Lo
ngitu
de
Dep
osit
type
nu
mbe
r re
cord
(n
orth
) (w
est)
(Pub
lishe
d m
odel
nam
es
num
ber_
______________________
_______________use
d w
here
app
licab
le)
Ref
eren
ces c
ited
in M
RD
S re
cord
sLe
vel o
f PG
E k
now
ledg
e
Ore
gon
Con
tinue
d
N> oo
M06
1643
B
lack
Bea
r No.
1&
2
Jose
phin
e 42
°01'
01"
123°
4837
" Po
difo
rm c
hrom
ite
M06
1796
B
row
n T
own
M04
5463
B
uck
Gul
ch
Jose
phin
e
Bak
er
M04
5456
B
ull R
un C
reek
Pla
cers
G
rant
M04
6813
B
yram
Gul
ch
Gra
nt
M01
SS74
C
apeB
lanc
oC
urry
8 M
0615
45
Car
ter C
reek
Div
ide
Cur
ry
Cla
im
9 M
0611
80
Cas
s R
anch
Ja
ckso
n
10
M01
4921
C
ham
bers
Min
e G
rant
11
M01
3520
C
hick
amin
Min
e C
oos
42°0
5'00
" 12
3°30
'51"
Pl
acer
Au-
PGE
?
44°4
5'04
tt 11
8°16
'17"
Pl
acer
Au-
PGE
44°4
7I45
" 11
8°23
'45"
Pl
acer
Au-
PGE
44°2
1'04
" 11
8°56
'19"
Pl
acer
Au-
PGE
4204
8-25
" 12
4°31
'52"
Pl
acer
Au-
PGE
42°1
2'29
" 12
3°50
37"
Podi
form
chr
omite
42°0
832"
12
2°50
'58"
Po
difo
rm c
hrom
ite
44°2
1'04
" 11
8°48
'49"
Po
difo
rm c
hrom
ite
43°1
7'00
" 12
4°18
'17"
Pl
acer
Au-
PGE
* M
0252
55
Chr
ome
Bea
ch P
lace
r C
urry
42
°53'
55"
124°
29'1
7"
Plac
er A
u-PG
E
12
M06
0531
C
hrom
e K
ing
No.
3
Jose
phin
e 42
°18'
44"
123°
49'0
2"
Podi
form
chr
omite
13
M06
1750
C
hrom
e R
idge
* M
0615
01
Cof
fins
14
M06
1243
C
olum
bia
Jose
phin
e 42
°26'
03"
123°
43'1
8"
Podi
form
chr
omite
Cur
ry
42°2
9'08
" 12
4°24
'00"
Pl
acer
Au-
PGE
Jose
phin
e 42
°38'
50"
123°
18'4
8"
Plac
er A
u-PG
E
Car
lson
and
oth
ers,
198
5 Pa
ge a
nd o
ther
s, 1
975
Ram
p, 1
961
Ram
p an
d Pe
ters
on, 1
979
Day
and
Ric
hard
s, 1
906
Broo
ks a
nd R
amp,
196
8 H
ill,
1919
O
DG
MI7
,193
9 Br
ooks
and
Ram
p, 1
968
Ram
p an
d B
rook
s, 1
969
Tha
yer,
19
77
Bla
ke,
1854
Gri
ggs,
194
6O
DG
MI7
, 19
40R
amp
and
othe
rs,
1977
Car
lson
and
oth
ers,
198
5R
amp,
196
1R
amp
and
othe
rs, 1
977
Car
lson
and
oth
ers,
198
5R
amp,
196
1A
lien,
194
1aC
arls
on a
nd o
ther
s, 1
985
Hun
dhau
sen
and
othe
rs, 1
9S6
OD
GM
I7,1
941
Tha
yer,
1940
Wes
tgat
e, 1
921
Bro
oks
and
Ram
p, 1
968
OD
GM
I7,
1940
Pard
ee,
1934
Ram
p an
d ot
hers
, 19
77A
lien,
194
1 aC
arls
on a
nd o
ther
s, 1
985
Ram
p, 1
961
Unp
ub. d
ata*
Car
lson
and
oth
ers,
198
5W
ells
and
oth
ers,
194
1U
npub
. dat
a*O
DG
MI7
,194
0Pa
rks
and
Swar
tley,
191
6R
amp
and
othe
rs,
1977
Broo
ks a
nd R
amp,
196
8D
ay a
nd R
icha
rds,
1906
OD
GM
I7,1
952
Ram
p an
d Pe
ters
on, 1
979
PGE
bel
ow u
pper
10%
of v
alue
s fo
r ch
rom
itite
sam
ples
(fire
ass
ay)
$483
0/to
n Pt
from
146
Ib ti
lani
fero
us
hem
atite
, con
cent
ratio
n fa
ctor
not
kno
wn
Unv
erif
ied
repo
rt o
f PG
E
Smal
l byp
rodu
ct P
GE
pro
duct
ion
(am
ount
unkn
own)
30
0 pp
b Pt
, 200
ppb
Pd,
10
ppb
Rh
from
mag
netic
frac
tion
of p
anne
d co
ncen
trate
s(f
ire a
ssay
)Sm
all b
ypro
duct
PG
E p
rodu
ctio
n (a
mou
nt
unkn
own)
26 p
pb R
h in
chr
omiti
te s
ampl
e (f
ire a
ssay
)
18 p
pb P
d, 2
6 pp
b R
h m
ax. i
n ch
rom
itite
sa
mpl
es (
fire
assa
y)
10 p
pb P
d in
chr
omiti
te s
ampl
e (f
ire a
ssay
)
0.09
oz/
ton
Pt in
con
cent
rate
s, O
.S Ib
co
ncen
trate
s fr
om 8
Ib s
ampl
e (g
rade
=
abou
t 190
ppb
)U
nver
ified
repo
rt o
f PG
E14
ppb
Pd
max
. in
chro
miti
te s
ampl
es (
fire
assa
y)
32 p
pb R
h m
ax. i
n ch
rom
itite
sam
ples
(fire
Unv
erif
ied
repo
rt o
f PG
E
$191
.40A
on P
t in
conc
entra
tes
at 1
:100
co
ncen
tratio
n (g
rade
= a
bout
2 p
pm)
15
M04
5460
C
ompt
onM
ine
Gra
nt
44°4
3'57
" 11
8°46
'18"
Po
lym
etal
lic v
eins
?
16 17
M06
1794
C
orbi
nC
urry
M02
5252
C
ryst
al T
erra
ce P
lace
r C
urry
M
0605
36
Dee
p G
orge
Chr
omite
Jo
seph
ine
42°4
8'17
" 12
4°23
37"
Plac
er A
u-PG
E
42°5
0'55
" 12
4°27
'01"
Pl
acer
Au-
PGE
42°1
8'54
" 12
3°46
'55"
Po
difo
rm c
hrom
ite
18
M06
0676
D
eep
Gra
vel
Min
e Jo
seph
ine
42°0
430"
12
3°39
'08"
Pl
acer
Au-
PGE
19
M06
1795
D
ivel
biss
#2
M04
5462
D
urke
e
20
M01
3S2S
Ea
gle
Min
e
Cur
ry
4204
8"27
" 12
4°23
30"
Plac
er A
u-PG
E
Bak
er
44°3
0'20
" 11
7°27
38"
Plac
er A
u-PG
E
Coo
s43
°11'
43"
124°
21'4
3"
Plac
erA
u-PG
E
21
M06
1824
Ea
gle
Mou
ntai
n C
urry
42
°16'
16"
123°
4933
" Po
difo
rm c
hrom
ite
Pros
pect
D
M02
5249
El
k R
iver
Pla
cers
C
urry
42
°42'
24"
124°
20'2
5"
Plac
erA
u-PG
E
* M
0606
7S
Este
rley
Chr
ome
Min
e Jo
seph
ine
42°0
4'42
" 12
3°37
'57"
Po
difo
rm c
hrom
ite
22
M06
0674
E
ster
ley
Plac
er
Jose
phin
e 42
°04'
08"
123°
38'0
0"
Plac
erA
u-PG
E
23
M06
0786
H
anag
anJo
seph
ine
42°2
8'15
" 12
3°30
W"
Plac
erA
u-PG
E
E&
MJ2
, 19
16H
ill,
1919
OD
GM
I7,1
941
Park
s an
d Sw
artle
y, 1
916
Qui
ring
, 19
62D
iner
, 190
2O
DG
MI7
, 19
40P
arks
and
Sw
artl
ey,
1916
Ram
p an
d ot
hers
, 197
7R
amp
and
othe
rs,
1977
Car
lson
and
oth
ers,
198
5O
DG
MI7
,195
2P
age
and
othe
rs,
1975
Ram
p, 1
961
Ram
p an
d Pe
ters
on, 1
979
Unp
ub. d
ata*
Bro
oks
and
Ram
p, 1
968
Dill
er,
1914
OD
GM
I7,1
952
Ram
p an
d P
eter
son,
197
9Sh
enon
, 19
33B
oggs
and
Bal
dwin
, 197
0B
rook
s an
d R
amp,
196
8D
iller
, 190
2P
arks
and
Sw
artl
ey,
1916
Day
and
Ric
hard
s, 1
906
Lin
dgre
n,
1912
OD
GM
I7 1
939
Libb
ey, 1
963
OD
GM
I7,
1940
Par
dee,
19
34C
arls
on a
nd o
ther
s, 1
985
Ram
p, 1
975
Ram
p an
d ot
hers
, 197
7O
DG
MI7
, 19
40R
amp
and
othe
rs,
1977
Car
lson
and
oth
ers,
198
5O
DG
MI7
,195
2Pa
ge a
nd o
ther
s, 1
975
Ram
p, 1
961
Ram
p an
d Pe
ters
on, 1
979
Shen
on, 1
933
Unp
ub. d
ata*
Bro
oks
and
Ram
p, 1
968
Din
er, 1
914
Mer
tie,
1969
OD
GM
I7,
1952
Ram
p an
d Pe
ters
on,
1979
Shen
on,
1933
Dill
er,
1914
OD
GM
I7,1
952
Ram
p an
d B
rook
s,
1969
Ram
p an
d Pe
ters
on, 1
979
Ore
sai
d to
ass
ay 1
.1 oz
/ton
Pt (a
naly
tical
m
etho
d un
know
n)
Trac
e IT
repo
rted
in sa
nd c
once
ntra
tes
(iden
tific
atio
n m
etho
d un
know
n)
Unv
erifi
ed re
port
of P
GE
15 p
pb P
d in
chr
omiti
te sa
mpl
e (f
ire a
ssay
)
Smal
l byp
rodu
ct P
GE
prod
uctio
n (a
mou
nt
unkn
own)
0.38
4 g
PGM
reco
vere
d fr
om 2
2.87
g b
lack
- sa
nd c
once
ntra
tes,
conc
entra
tion
fact
or n
ot
know
n (id
entif
ied
visu
ally
)
$6.6
0/to
n Pt
in c
once
ntra
tes,
6 Ib
of
conc
entra
tes f
rom
1 to
n of
gra
vel (
grad
e =
abou
t 23
ppb)
Bla
ck sa
nd c
once
ntra
te sa
id to
ass
ay $
l/ton
P
t, c
once
ntra
tion
fact
or 1
:2 (g
rade
= a
bout
17
0 pp
b)30
ppb
Rh
max
. in
chro
miti
te sa
mpl
es (f
ire
Unv
erifi
ed re
port
of P
GE
PGE
belo
w u
pper
10%
of v
alue
s fo
r ch
rom
itite
sam
ples
(fire
ass
ay)
Smal
l byp
rodu
ct P
GE
prod
uctio
n (a
mou
nt
unkn
own)
Smal
l byp
rodu
ct P
GE
prod
uctio
n (a
mou
nt
unkn
own)
Tabl
e 1.
List
of p
latin
um-g
roup
-ele
men
t (PG
E) o
ccur
renc
es w
ithin
the
cont
erm
inou
s U
nite
d St
ates
that
are
con
tain
ed in
the
U.S
. Geo
logi
cal S
urve
y's
Min
eral
Res
ourc
e D
ata
Syst
em (
MR
DS
) C
onti
nued
Map
nu
mbe
rM
RD
S re
cord
nu
mbe
r
Prop
erty
nam
eC
ount
yLa
titud
e (n
orth
)Lo
ngitu
de
(wes
t)D
epos
it ty
pe
(Pub
lishe
d m
odel
nam
es
used
whe
re a
pplic
able
)
Ref
eren
ces c
ited
in M
RD
S re
cord
sLe
vel o
f PG
E k
now
ledg
e
Ore
gon C
ontin
ued
24
25 * 26
M01
5530
M04
5459
M01
3262
M06
1614
Flet
cher
Mye
rs
Prop
erty
Fo
ster
Fry
Gul
ch M
ine
Gar
dner
Min
e
Coo
s
Linn
Jose
phin
e
Cur
ry
43°1
337"
44°2
4'55
"
42°0
335"
4201
1'51
"
124°
22'1
3"
122°
40'1
1"
123°
38'5
7"
123°
58'5
1"
Plac
erA
u-PG
E
Plac
erA
u-PG
E
Plac
erA
u-PG
E
Podi
form
chr
omite
OD
GM
I7,
1940
Day
and
Ric
hard
s,
1906
L
indg
ren,
19
12Pa
rks
and
Swar
tley,
191
6
OD
GM
I7, 1
952
Ram
p an
d Pe
ters
on, 1
979
Shen
on,
1933
Car
lson
and
oth
ers,
19
85
0.04
oz/
ton
Au+
Pt in
nat
ural
bla
ck s
and
accu
mua
tion
(ana
lytic
al m
etho
d un
know
n)
$105
.60A
on P
t in
conc
entr
ates
, co
ncen
tratio
n fa
ctor
not
kno
wn
Una
ble
to fi
nd s
ourc
e of
PG
E d
ata
16 p
pb P
d, 4
00 p
pb R
u in
chr
omiti
te s
ampl
e
27
M01
3534
G
eige
r Cre
ek M
ines
, In
c.
D
M04
S4S8
G
rani
te P
lace
rs
28
W01
6701
G
reen
horn
Pla
cers
(>j
0
29
M06
0563
G
riffin
Chr
omite
30 31 32
M04
5467
G
riffit
h
M01
4622
H
.E. P
eepl
es, R
ober
tB
row
n W
0006
90
Han
na N
icke
l Min
e
M06
0610
H
awks
Res
t Vie
w
Coo
s 43
°05'
55"
124°
2237
" Pl
acer
Au-
PGE
Gra
nt
44°4
9I18
" 11
8°26
'57"
Pl
acer
Au-
PGE
Bak
er, G
rant
44
°40'
53"
118°
27'1
4"
Plac
erA
u-PG
E
Jose
phin
e 42
°16'
06"
123°
41'2
4"
Podi
form
chr
omite
Gra
nt
Uni
on,
Wal
low
a
44°4
7'02
" 11
8°18
'47"
Pl
acer
Au-
PGE
45°1
0W
UT
23W
" Pl
acer
Au-
PGE
42°5
7'40
" 12
3°26
'20"
L
ater
iticN
i
Cur
ry42
°113
3"
123°
52'0
0"
Podi
form
chr
omite
Pag
e an
d ot
hers
, 19
75R
amp,
196
1R
amp
and
othe
rs, 1
977
Lib
bey,
196
3O
DG
MI7
, 19
40B
rook
s an
d R
amp,
196
8L
umb,
19
20B
rook
s an
d R
amp,
196
8L
indg
ren,
19
01O
DG
MI7
,193
9,19
41Pa
rdee
and
Hew
ett,
1914
Car
lson
and
oth
ers,
198
5O
DG
MI7
,195
2P
age
and
othe
rs,
1975
Ram
p, 1
961
Ram
p an
d Pe
ters
on, 1
979
Unp
ub. d
ata*
OD
GM
I7,
1941
Par
dee,
19
10P
arde
e an
d H
ewet
t, 19
14Pa
rks
and
Swar
tley,
191
6C
alif
orni
a M
inin
g Jo
urna
l, 19
66
Bog
ert,
I960
Cor
nwal
l, 19
66,1
973
Cum
berl
idge
and
Cha
ce, 1
968
Hot
z, 1
964
Min
ing
Jour
nal o
f Lon
don,
197
4P
age
and
othe
rs,
1975
Peco
ra a
nd H
obbs
, 194
2R
amp,
197
8Sk
inne
r, 19
73U
npub
. dat
a*C
arls
on a
nd o
ther
s,
1985
Ram
p, 1
961
Ram
p an
d ot
hers
, 197
7
(fire
ass
ay)
Unv
erif
ied
bypr
oduc
t PG
E p
rodu
ctio
n
Unv
erif
ied
repo
rt o
f PG
E
Unv
erif
ied
bypr
oduc
t PG
E p
rodu
ctio
n
82 p
pb R
h in
chr
omiti
te s
ampl
e (f
ire a
ssay
)
1.5
oz/to
n Pt
in b
lack
-san
d co
ncen
trat
e,
conc
entra
tion
fact
or n
ot k
now
n (a
naly
tical
m
etho
d un
know
n)
Unv
erifi
ed re
port
of P
GE
18.7
8 pp
b Pt
, 22.
19 p
pb P
d, 1
1.53
ppb
Rh,
48
.78
ppb
Ir,
156.
22 p
pb R
u av
g. f
or 1
9 ro
ck s
ampl
es (
fire
ass
ay).
The
se n
umbe
rs
are
pres
umed
to b
e un
pub.
dat
a of
N.J
Pa
ge, a
s th
ey d
o no
t app
ear i
n 19
75
refe
renc
e.
60 p
pb R
h in
chr
omiti
te s
ampl
e (f
ire a
ssay
)
33 * 34 35 36 * D * * * 37 38 39 * 40
M01
3261
H
igh
Gra
vel
M06
2180
H
ighl
and
Cla
im
M04
S461
H
illsb
oro
M02
5S18
H
indm
an P
lace
r
Jose
phin
e 42
°02'
51"
123°
38'2
3"
Plac
er A
u-PG
E
Jack
son
Was
hing
ton
Bak
er
M02
5250
H
ubba
rd C
reek
Bea
ch
Cur
ryPl
acer
M
P002
62
Illin
ois R
iver
sulfi
de
Jose
phin
eoc
curr
ence
M06
0567
In
depe
nden
ce P
lace
r Jo
seph
ine
M01
3S3S
Io
wa
Min
e C
oos
M01
3266
Jo
seph
ine
Cre
ek
Plac
ers
M01
4790
K
it C
arso
n G
rant
M04
S464
L
aGra
nde
Uni
onM
01SS
38
Lane
Ext
ensi
on M
ine
Coo
sM
0468
09
Last
Cha
nce
Gra
nt
M06
1644
La
st D
rink
No.
1
M02
5S46
Li
berty
Chr
ome
Gra
nt
M04
6808
Li
berty
Chr
ome S
outh
G
rant
M04
6814
Li
ttle
Indi
an C
reek
G
rant
M04
6812
Li
ttle P
ine C
reek
G
rant
M06
1574
Li
ttte
Sibe
ria
Cur
ry
M06
16S9
Lu
cky
Strik
e
42°2
0'02
" 12
3°09
'52"
Lo
w-s
ulfid
e Au-
quar
tz
vein
s?
45°3
0'01
" 12
2°59
'24"
Pl
acer
Au-
PGE
44°4
1'28
" 11
8°19
'06"
Pl
acer
Au-
PGE
42°4
4'02
" 12
4°28
'28"
Pl
acer
Au-
PGE
42°2
5'48
" 12
4°00
37"
Aco
je N
i-Cu-
PGE?
(mag
mat
ic s
ulfi
de n
om
odel
) 42
°14'
40"
123°
41'1
2"
Plac
erA
u-PG
E
43°0
6'43
" 12
4°22
'09"
Pl
acer
Au-
PGE
Jose
phin
e 42
°13'
17"
123°
4231
" Pl
acer
Au-
PGE
44°4
2'04
" 11
8°31
'03"
Po
lym
etaf
fic v
eins
?45
°203
3"
1180
05'0
7"
Plac
erA
u-PG
E43
°11'
20"
124°
21'5
0"
Plac
erA
u-PG
E44
°20'
28"
118°
44'0
0"
Podi
form
chr
omite
Jose
phin
e 42
°00'
45"
123°
4738
" Po
difo
rm c
hrom
ite
44°1
9'50
" 11
8°44
'10"
Po
difo
rm c
hrom
ile
44°1
939"
11
8°44
'06"
Po
difo
rm c
hrom
ite
44°2
1'06
" 11
8047
12"
Plac
erA
u-PG
E
44°2
2'42
" 11
8°54
37"
Plac
erA
u-PG
E
42°1
636"
12
3°50
'51"
Po
difo
rm c
hrom
ite
Jose
phin
e 42
°10'
25"
123°
40'4
9"
Podi
form
chr
omite
Bro
oks
and
Ram
p, 1
968
OD
GM
I7,1
952
Park
s an
d Sw
artle
y, 1
916
Ram
p an
d Pe
ters
on, 1
979
Shen
on,
1933
K
ello
gg,
1922
M
ertie
, 19
69
OD
GM
I7,1
943
Park
s an
d Sw
artle
y, 1
916
Lin
dgre
n,
1912
L
indg
ren,
19
01
Ram
p an
d ot
hers
, 19
77
Foos
e,
1986
Pa
ge a
nd o
ther
s, 19
81
OD
GM
I7,
1952
R
amp
and
Pete
rson
, 197
9 Li
bbey
, 196
3O
DG
MI7
, 19
40P
arde
e,
1934
Bro
oks
and
Ram
p,
1968
OD
GM
I7,
1952
Ram
p an
d P
eter
son,
197
9S
penc
er,
1971
OD
GM
I7,
1941
L
indg
ren,
19
12O
DG
MI7
, 19
40
Stot
elm
eyer
, 19
77
Thay
er, 1
940
Car
lson
and
oth
ers,
198
5 P
age
and
othe
rs,
1975
R
amp,
196
1R
amp
and
Pete
rson
, 197
9 St
otel
mey
er,
1977
Th
ayer
, 194
0 St
otel
mey
er,
1977
Th
ayer
, 194
0 T
haye
r,
1977
Tha
yer,
19
77
Car
lson
and
oth
ers,
198
5P
age
and
othe
rs,
1975
Ram
p, 1
961
Ram
p an
d ot
hers
, 197
7U
npub
. dat
a*C
arls
on a
nd o
ther
s, 1
985
Pag
e an
d ot
hers
, 19
75R
amp,
196
1R
amp
and
Pete
rson
, 197
9U
npub
. dat
a*
Una
ble t
o lo
cate
sou
rce
of P
GE
data
Byp
rodu
ct P
GE
in s
mel
ter r
etur
ns (
0.32
oz
/ton,
am
ount
unk
now
n)
Unv
erifi
ed re
port
of P
GE
Smal
l byp
rodu
ct P
GE
prod
uctio
n (O
.S o
z pe
r cl
eanu
p)
Unv
erifi
ed re
port
of P
GE
150
ppb
Pt, 5
00 p
pb P
d m
ax. s
ulfid
e-ric
h sa
mpl
es (f
ire a
ssay
)
Vis
ual i
dent
ifica
tion
of P
GM
in b
lack
sand
s
Unv
erifi
ed re
port
of P
GE
Smal
l byp
rodu
ct P
GE
prod
uctio
n (a
mou
nt
unkn
own)
Unv
erifi
ed re
port
of P
GE
Unv
erifi
ed re
port
of P
GE
Unv
erifi
ed re
port
of P
GE
0.02
oz/
ton
Pt in
sto
ckpi
le s
ampl
e (f
ire
PGE
belo
w u
pper
10%
of v
alue
s fo
r ch
rom
itite
sam
ples
(fire
ass
ay)
0.02
oz/
ton
Pt in
sto
ckpi
le sa
mpl
e (f
ire
assa
y)
0.02
oz/
ton
Pt in
sto
ckpi
le sa
mpl
e (f
ire
16 p
pb P
d in
mag
netic
frac
tion
of pa
nned
conc
entra
te (f
ire a
ssay
) 70
ppb
Pt,
70 p
pb P
d in
mag
netic
frac
tion
ofpa
nned
con
cent
rate
(fire
ass
ay)
PGE
belo
w u
pper
10%
of v
alue
s fo
rch
rom
itite
sam
ples
(fire
ass
ay)
81 p
pb P
t, 30
0 pp
b fr
, 700
ppb
Ru,
58
ppb
Rh
in c
hrom
itite
sam
ple
(fire
ass
ay)
Tabl
e 1.
Lis
t of p
latin
um-g
roup
-ele
men
t (PG
E)p
ccur
renc
es w
ithin
the
cont
erm
inou
s U
nite
d St
ates
that
are
con
tain
ed in
the
U.S
. Geo
logi
cal S
urve
y's
Min
eral
Res
ourc
e D
ata
Syst
em (
MR
DS
) C
onti
nued
Map
M
RD
S Pr
oper
ty n
ame
Cou
nty
Latit
ude
Lon
gitu
de
Dep
osit
type
num
ber
reco
rd
(nor
th)
(wes
t) (P
ublis
hed
mod
el n
ames
num
ber
___
__
_
__
__
__
__
use
d w
here
app
licab
le)
Ref
eren
ces
cite
d in
MR
DS
reco
rds
Leve
l of P
GE
kno
wle
dge
Ore
gon
Con
tinue
d
to
* M
0613
76
Mad
den
Cur
ry
D
M06
1569
M
cCal
eb G
roup
C
urry
41
MP0
0071
M
cCal
eb N
o. 1
C
urry
42
MP0
0046
M
cCal
eb N
o. 2
C
urry
* M
0252
51
Mee
k's
Plac
er
Cur
ry
D
M06
1616
N
icke
l Mou
ntai
n G
roup
D
ougl
as
43
M01
4937
N
orth
For
k Pl
acer
s G
rant
42°4
9'57
" 12
4028
73"
Plac
er A
u-PG
E
42°1
6'41
" 12
3°50
'06"
Po
difo
rm c
hrom
ite
42°1
6'42
" 12
3°49
'55"
Po
difo
rm c
hrom
ite
42°1
6'41
" 12
3°50
'08"
Po
difo
rm c
hrom
ite
42°4
539"
12
4°28
30"
Plac
er A
u-PG
E
42°5
7'40
" 12
3°26
'20"
L
ater
iticI
*
44°5
8'28
" 11
8°43
'55"
Pl
acer
Au-
PGE
44
M06
0747
O
ld C
hann
elJo
seph
ine
42°3
4'21
" 12
3°36
30"
Plac
er A
u-PG
E
M06
0541
O
rego
n C
hrom
e M
ine
Jose
phin
e 42
°20'
41"
123°
46'2
8"
Podi
form
chr
omite
M06
1329
O
rego
n M
inin
g an
d D
ougl
as
Pow
er C
o.42
°45'
22"
123°
3136
" Pl
acer
Au-
PGE
* M
0610
84
Para
dise
No.
2
Jose
phin
e 42
°13'
11"
123°
24'4
9"
Podi
form
chr
omite
c C
"tt
v42
°W4«
" W
WW
Pl
acer
Au-
POR
Mac
hine
Pro
ject
Dil
ler,
19
14O
DG
MI7
, 19
40R
amp
and
othe
rs,
1977
Page
and
oth
ers,
197
5R
amp,
196
1R
amp
and
othe
rs, 1
977
Unp
ub. d
ata*
Car
lson
and
oth
ers,
198
5R
amp,
196
1C
arls
on a
nd o
ther
s, 1
985
Ram
p, 1
961
Ram
p an
d ot
hers
, 197
7D
ille
r,
1914
OD
GM
I7,
1940
P
arks
and
Sw
artl
ey,
1916
R
amp
and
othe
rs,
1977
C
umbe
rlid
ge a
nd C
hase
, 196
8 P
age
and
othe
rs,
1975
R
amp,
196
1,19
72,1
978
OD
GM
I7,1
941
Park
s an
d Sw
artle
y, 1
916
Unp
ub.
data
*B
rook
s an
d R
amp,
196
8O
DG
MI7
,195
2Pa
rks
and
Swar
tley,
191
6R
amp
and
Bro
oks,
196
9R
amp
and
Pete
rson
, 197
9C
arls
on a
nd o
ther
s, 1
985
OD
GM
I7,1
952
Page
and
oth
ers,
197
5R
amp,
196
1R
amp
and
Pete
rson
, 197
9U
npub
. dat
a*D
ay a
nd R
icha
rds,
190
6Pa
rks
and
Swar
tley,
191
6P
ulsi
fer,
19
10R
amp,
197
2C
arls
on a
nd o
ther
s, 1
985
Page
and
oth
ers,
197
5R
amp,
196
1R
amp
and
Pete
rson
, 197
9U
npub
. dat
a*D
ay a
nd R
icha
rds,
190
6O
DG
MI7
,194
0 R
amp
and
othe
rs, 1
977
0.02
oz/
ton
Au+
Pt m
ax. i
n sa
nd s
ampl
es
(ana
lytic
al m
etho
d un
know
n); P
t:Au=
l :20
11 p
pb P
d in
chr
omiti
te s
ampl
e (f
ire a
ssay
)
11 p
pb P
d in
chr
omiti
te s
ampl
e (f
ire a
ssay
)
40 p
pb P
d m
ax. i
n ch
rom
itite
sam
ples
(fir
e
Unv
erif
ied
repo
rt o
f PG
E
25 p
pb R
h in
rock
sam
ple
(fir
e as
say)
Ana
lysi
s of c
once
ntra
te fr
om a
cle
anup
gav
e 6.
82%
Pt (
anal
ytic
al m
etho
d un
know
n)
Smal
l byp
rodu
ct P
GE
pro
duct
ion
(am
ount
un
know
n)
PGE
bel
ow u
pper
10%
of v
alue
s fo
r ch
rom
itite
sam
ples
(fir
e as
say)
$67.
50/to
n Pt
in c
once
ntra
tes,
2 Ib
of
conc
entra
tes
from
1 y
d3 o
f gra
vel (
grad
e
abou
t 39
ppb)
PGE
bel
ow u
pper
10%
of v
alue
s fo
r ch
rom
itite
sam
ples
(fi
re a
ssay
)
$l,0
22.lO
/ton
Pt in
con
cent
rate
s,
conc
entra
tion
fact
or n
ot k
now
n
46 * * 47 48
M01
3526
Pi
onee
r Min
e C
oos
M02
5254
Pi
onee
r Pla
cer
Cur
ry
M06
0672
Pl
ater
icaN
fine
Jose
phin
e
MP0
0054
Pr
ospe
ct n
ear M
ud
Jose
phin
eSp
ring
M
P000
48
Pros
pect
sou
th o
f C
uny
Vul
can
Peak
M06
1573
Pr
ospe
ctor
s D
ream
C
urry
49
M01
5020
R
ay M
ine
Gra
nt
50
M05
5858
R
edH
atL
ater
ite
Cur
ry
M06
1619
R
ed M
ount
ain
Min
es
Jack
son
51
M06
0561
R
evel
l Pla
cer
52
M01
3524
R
ose
Min
eC
oos
53
M01
5592
R
ough
and
Rea
dy
Cur
ry
Ben
ch54
M
0615
99
Sadd
le C
hrom
e
55
M06
0792
Sa
lt R
ock
43°1
1'42
" 12
4°21
'47"
Pl
acer
Au-
PGE
42°5
3'20
" 12
4°27
'53"
Pl
acer
Au-
PGE
42°0
3'13
" 12
3°38
W
Plac
erA
u-PG
E
42°0
5'43
" 12
3°48
'42"
Po
difo
rm c
hrom
ite
42°0
9'43
" 12
3°58
'53"
Po
difo
rm c
hrom
ite
42°1
638"
12
3°51
'13"
Po
difo
rm c
hrom
ite
44°2
0'23
" 11
8°46
'09"
Po
difo
rm c
hrom
ite
42°2
030"
12
4°17
'23"
L
ater
iticN
i
42°0
3'42
" 12
2°50
'19"
Po
difo
rm c
hrom
ite
Jose
phin
e 42
°16'
44"
123°
41'2
4"
Plac
erA
u-PG
E
43°1
3'14
" 12
402r
47"
Plac
erA
u-PG
E
4200
7'00
" 12
3°49
'05"
L
ater
iticN
i
Jose
phin
e 42
°17'
59"
123°
48'2
6"
Podi
form
chr
omite
Jose
phin
e 42
°28'
16"
123°
33'4
7"
Podi
form
chr
omite
56
M01
5537
Se
ngst
acke
nC
oos
43°1
7-21
" 12
4°17
'59"
Pl
acer
Au-
PGE
Bro
oks
and
Ram
p, 1
968
Lib
bey,
196
3 O
DG
MI7
, 19
40
Par
dee,
19
34
Ram
p an
d ot
hers
, 19
77O
DG
MI7
, 19
52Sh
enon
, 19
33C
arls
on a
nd o
ther
s,
1985
Car
lson
and
oth
ers,
19
85H
imm
elbe
rg a
ndL
oney
, 197
3P
age
and
othe
rs,
1975
Car
lson
and
oth
ers,
19
85P
age
and
othe
rs,
1975
Ram
p, 1
961
Ram
p an
d ot
hers
, 197
7A
lien,
194
1aC
arls
on a
nd o
ther
s,
1985
OD
GM
I7,1
941
Stot
elm
eyer
, 19
77T
haye
r, 19
40W
estg
ate,
192
1B
rook
s, 1
963
Dol
e an
d ot
hers
, 194
8H
otz,
196
4H
undh
ause
n an
d ot
hers
, 195
4O
DG
MI7
, 19
40R
amp,
197
8R
amp
and
othe
rs, 1
977
U.S
. B
urea
u of
Min
es,
1965
Car
lson
and
oth
ers,
198
5Fe
rns,
197
9*P
age
and
othe
rs,
1975
Ram
p, 1
961
Unp
ub. d
ata*
Day
and
Ric
hard
s, 1
906
OD
GM
I7,
1952
Bro
oks
and
Ram
p, 1
968
Lib
bey,
196
3O
DG
MI7
, 19
40R
amp,
19
78R
amp
and
Pete
rson
, 197
9C
arls
on a
nd o
ther
s,
1985
Ram
p, 1
961
Car
lson
and
oth
ers,
198
5P
age
and
othe
rs,
1975
Ram
p, 1
961
Ram
n sm
<\ P
eter
son,
Unp
ub. d
ata*
OD
GM
I7,
1940
Pt w
ith m
inor
Ir, R
u fo
und
in s
pect
rogr
aphi
c an
alys
is o
f PG
E a
lloy
reco
vere
d in
slu
icin
g
Unv
erif
ied
repo
rt o
f PG
E
Unv
erif
ied
repo
rt o
f PG
E
20 p
pb P
d in
chr
omiti
te s
ampl
e (f
ire a
ssay
)
100
ppb
Pt, 2
0 pp
b Pd
in c
hrom
itite
sam
ple
(fire
ass
ay)
PGE
bel
ow u
pper
10%
of v
alue
s fo
r ch
rom
itite
sam
ples
(fir
e as
say)
120
ppb
Pt, 5
00 p
pb R
u, 6
4 pp
b R
h m
ax. i
n ch
rom
itite
sam
ples
(fir
e as
say)
Ore
sam
ple
said
to a
ssay
$20
/ton
Pt u
sing
w
et c
hem
ical
met
hods
(gr
ade
= ab
out 2
0 pp
m a
t $34
/oz)
PGE
bel
ow u
pper
10%
of v
alue
s fo
r ch
rom
itite
sam
ples
(fir
e as
say)
$323
.10A
on P
t in
conc
entr
ates
, 75
Ib o
f co
ncen
trate
s fr
om 1
ton
of g
rave
l (gr
ade
= ab
out 1
4 pp
m)
Unv
erif
ied
bypr
oduc
t PG
E p
rodu
ctio
n
Smal
l byp
rodu
ct P
GE
pro
duct
ion
(am
ount
unkn
own)
10
0 pp
b Pt
, 20
ppb
Pd, 4
0 pp
b R
h m
ax. i
nch
rom
itite
sam
ples
(fir
e as
say)
85
0 pp
b Pt
, 900
ppb
Ir,
1.6
ppm
Ru,
91
ppb
Rh
in c
hrom
itite
sam
ple
(fire
ass
ay)
0.01
oz/
ton
Au+
Pt in
bla
ck s
and
sam
ple
(ana
lytic
al m
etho
d un
know
n)
Tabl
e 1.
List
of p
latin
um-g
roup
-ele
men
t (PG
E) o
ccur
renc
es w
ithin
the
cont
CTm
inou
s Uni
ted
Stat
es th
at a
re c
onta
ined
in th
e U
.S. G
eolo
gica
l Sur
vey'
s M
iner
al R
esou
rce
Dat
a Sy
stem
(M
RD
S) C
ontin
ued
Map
M
RDS
Prop
erty
nam
e nu
mbe
r re
cord
nu
mbe
r
Cou
nty
Latit
ude
Long
itude
D
epos
it ty
pe(n
orth
) (w
est)
(Pub
lishe
d m
odel
nam
es
__
__
__
__
__
__
__
__
__
__
__
use
d w
here
app
licab
le)
Ref
eren
ces c
ited
in M
RD
S re
cord
sLe
vel o
f PG
E kn
owle
dge
Ore
gon
Con
tinue
d*
M06
1553
Sh
ady
Cov
e
57
M06
1386
Sh
amro
ck
Jose
phin
e 42
°277
9"
123°
4379
" Po
difo
rm c
hrom
ite
Jack
son
* M
0468
11
Shee
p G
ulch
G
rant
58
M06
1378
Si
xes
Bea
ch P
lace
r C
urry
* M
0454
65
Span
ish
Gul
ch P
lace
rs
Whe
eler
* M
P000
64
Stev
ens P
lace
r C
urry
59
M05
4912
Su
mpt
er D
redg
es
Bak
er
42°3
6'05
" 12
2°58
33"
Syno
roge
nic-
synv
olca
nic
Ni-C
u
44°2
0'04
" 11
8054
124"
Plac
er A
u-PG
E
42°5
1'12
" 12
4°27
'50"
Pl
acer
Au-
PGE
44°2
739"
11
9°46
33"
Plac
erA
u-PG
E
42°1
2'23
" 12
3°54
'43"
Pl
acer
Au-
PGE
4404
438-
11
8°12
'23"
Pl
acer
Au-
PGE
M06
1651
Te
nnes
see
Chr
omite
Jo
seph
ine
42°1
1'45
" 12
3°43
'12"
Po
difo
rm c
hrom
ite
60
M06
0629
Te
nnes
see P
ass
Jose
phin
e 42
°11'
35"
123°
42'1
8"
Podi
form
chr
omite
M01
5557
Th
e Lag
oons
M
P000
47
Tinc
upPe
akC
oos
43°1
1'18
" 12
4°23
I10"
Pl
acer
Au-
PGE
42°1
8'42
" 12
3°54
'47"
A
lask
anPG
E
M06
1596
Tw
in C
edar
s Cla
ims
Jose
phin
e 42
°173
1"
123°
4830
" Po
difo
rm c
hrom
ite
61M
P000
72
U o
f O P
rosp
ect
Gra
nt44
°20'
46"
118°
4634
" Po
difo
rm c
hrom
ite
Car
lson
and
oth
ers,
198
5O
DG
MI7
,195
2Pa
ge a
nd o
ther
s, 1
975
Ram
p, 1
961
Ram
p an
d Pe
ters
on, 1
979
Unp
ub. d
ata*
Hun
dhau
sen,
19
52
Ram
p,
1978
Sh
elto
n, 1
956
Unp
ub.
data
Tha
yer,
19
77
Oili
er,
1914
OD
GM
I7,
1940
Park
s an
d Sw
artle
y, 1
916
Ram
p an
d ot
hers
, 19
77B
rook
s an
d R
amp,
196
8C
ollie
r, 19
14H
ill,
1919
Lum
b,
1920
Park
s an
d Sw
artle
y, 1
916
Ram
p,
1975
Ram
p an
d ot
hers
, 19
77B
rook
s, 1
963
Bro
oks
and
Ram
p, 1
968
Fred
eric
k, 1
945
Lum
b,
1920
OD
GM
I7,1
939
Ram
p an
d B
rook
s, 1
969
U.S
. Bur
eau
of M
ines
, 196
5C
arls
on a
nd o
ther
s, 1
985
Page
and
oth
ers,
197
5R
amp,
196
1R
amp
and
Pete
rson
, 197
9U
npub
. dat
a*C
arls
on a
nd o
ther
s, 1
985
Page
and
oth
ers,
197
5R
amp,
196
1R
amp
and
Pete
rson
, 197
9U
npub
. dat
a*G
rigg
s,
1946
Gra
y an
d ot
hers
, 19
86U
npub
. da
taC
arls
on a
nd o
ther
s, 1
985
Page
and
oth
ers,
197
5R
amp,
196
1U
npub
. dat
a*C
arls
on a
nd o
ther
s, 1
985
PGE
belo
w u
pper
10%
of v
alue
s fo
r ch
rom
itite
sam
ples
(fire
ass
ay)
660
ppb
Pd, 2
3 pp
b Pt
, 48
ppb
Rh
in
sulfi
de-r
ich
sam
ple
(fire
ass
ay)
15 p
pb P
d in
mag
netic
frac
tion
of pa
nned
co
ncen
trate
sam
ple
(fire
ass
ay)
Una
ble
to fi
nd s
ourc
e of
anal
ytic
al d
ata i
n re
cord
indi
catin
g $0
.12A
on P
t max
. in
Unv
erifi
ed re
port
of P
GE
Unv
erifi
ed re
port
of P
GE
Smal
l byp
rodu
ct P
GE
prod
uctio
n
PGE
belo
w u
pper
10%
of v
alue
s fo
r ch
rom
itite
sam
ples
(fire
ass
ay)
450
ppb
Pt, 7
00 p
pb fr
, 1.8
ppm
Ru,
63
ppb
Rh
in c
hrom
itite
sam
ple
(fire
ass
ay)
Unv
erifi
ed re
port
of P
GE
52.2
ppb
Pt,
53.3
ppb
Pd
max
. in
aver
age
ofro
ck sa
mpl
es (f
ire a
ssay
) PG
E be
low
upp
er 1
0% o
f val
ues
for
chro
miti
te sa
mpl
es (f
ire a
ssay
)
16 p
pb P
d in
chr
omiti
te sa
mpl
e (f
ire a
ssay
)
62 * 63 64 65 66 D
M04
6810
MP0
0108
MP0
0067
M
P000
60
Unn
amed
occ
urre
nce
Unn
amed
pro
spec
t
Unn
amed
pro
spec
t U
nnam
ed p
rosp
ect
Gra
nt
Ham
ey
Jose
phin
e Jo
seph
ine
44°2
1'19
"
42°1
3'20
"
42°1
6'12
"
42°1
6X)5
"
Plac
er A
u-PG
E
119°
2ri2
" U
nkno
wn
123°
49X
)2"
123°
51'5
8"Po
difo
rm c
hrom
ite
Podi
form
chr
omite
MP0
0059
U
nnam
ed p
rosp
ect
Cur
ry42
°12'
05"
123°
58'5
1M
Podi
form
chr
omite
MP0
0260
M
0605
23U
nnam
ed p
rosp
ect
Vio
let
Gra
nt
Jose
phin
e
44°2
137"
42
°263
3"11
8°55
'49"
12
3°43
'40"
Podi
form
chr
omite
Po
difo
rm c
hrom
ite
M01
3263
W
aldo
Are
a P
lace
rs
Jose
phin
e 42
°03'
11"
123°
39'1
4"
Plac
er A
u-PG
E
Tha
yer,
19
77
Mill
er,
1988
Car
lson
and
oth
ers,
198
5 C
arls
on a
nd o
ther
s, 1
985
Car
lson
and
oth
ers,
198
5
Car
lson
and
oth
ers,
198
5C
arls
on a
nd o
ther
s, 1
985
OD
GM
I7,1
952
Page
and
oth
ers,
197
5R
amp,
196
1R
amp
and
Pete
rson
, 197
9W
ells
and
oth
ers,
194
1U
npub
. dat
a*
OD
GM
I7,
1952
Ram
p an
d Pe
ters
on,
1979
3 pp
m P
t, 80
0 pp
b Pd
in m
agne
tic f
ract
ion
of pa
nned
con
cent
rate
(fire
ass
ay)
30 p
pb P
t, 2
ppb
Pd m
ax. i
n ro
ck s
ampl
es(f
ire a
ssay
)20
0 pp
b Pd
in c
hrom
itite
sam
ple
(fir
e as
say)
75
ppb
Pt,
18 p
pb P
dl40
ppb
Rh
max
. in
chro
miti
te sa
mpl
es (
fire
assa
y)
27 p
pb R
h m
ax. i
n ch
rom
itite
sam
ples
(fir
eas
say)
26 p
pb R
h in
chr
omiti
te s
ampl
e (f
ire a
ssay
) PG
E b
elow
upp
er 1
0% o
f val
ues
for
chro
miti
te sa
mpl
es (
fire
assa
y)
Smal
l byp
rodu
ct P
GE
pro
duct
ion
(am
ount
un
know
n bu
t may
be
clos
e to
1,5
00 o
z,
whi
ch is
tota
l Ore
gon
outp
ut s
ee te
xt)
67
68
M04
5466
M06
1804
M06
1598
Wea
ver M
ine
Woo
dcoc
k C
reek
You
ng's
Min
e
Bak
er
Jose
phin
e
Jose
phin
e
44°4
5'15
"
42°0
7'56
"
42°1
7'59
"
118°
16'4
3M
123°
4230
"
123°
48'5
0"
Plac
er A
u-PG
E
Podi
form
chr
omite
Podi
form
chr
omite
OD
GM
I7, 1
939
Par
dee,
19
10
Par
dee
and
Hew
ett,
1914
C
arls
on a
nd o
ther
s,
1985
P
age
and
othe
rs,
1975
C
arls
on a
nd o
ther
s,
1985
P
age
and
othe
rs,
1975
R
amp,
196
1
Pt d
etec
ted
in b
lack
-san
d sa
mpl
e (a
naly
tical
m
etho
d un
know
n)
PGE
bel
ow u
pper
10%
of v
alue
s fo
r ch
rom
itite
sam
ples
(fir
e as
say)
30
ppb
Pd
max
. in
chro
miti
te s
ampl
es (
fire
as
say)
Penn
sylv
ania
* 1 2
M04
5423
M
0454
22
MP0
0247
Boy
erto
wn
Lan
cast
er C
ount
y
Unn
amed
PG
E
occu
rren
ce
Ber
ks
Lanc
aste
r
Cum
berla
nd
40°2
5i26
lt 39
°58'
46"
40°1
1'50
"
075°
34'2
0"
076°
11'0
7"
076°
51'5
6"
Unk
now
n U
nkno
wn
Mag
mat
ic s
egre
gatio
n (n
o m
odel
)
Kem
p,
1902
K
emp,
19
02
Got
tfri
ed a
nd F
roel
ich,
19
88
Got
tfri
ed a
nd o
ther
s,
1989
, 19
90
Unv
erif
ied
repo
rt o
f PG
E
Pt d
etec
ed in
ana
lysi
s of
sulfi
de-b
earin
g sl
ate
(cup
elle
d bu
tton
from
sam
ple
fuse
d w
ith
lead
oxi
de a
nd b
lack
flux
)21
ppb
Pt,
165
ppb
Pd m
ax. i
n ro
ck s
ampl
es
(fire
ass
ay)
Texa
s*
M04
5418
Llan
oLl
ano
30°4
5'11
"ws
'MO'W
"U
nkno
wn
Qui
ring
, 19
62U
nver
ifie
d re
port
of P
GE
Uta
hW
0028
88
Bin
gham
ope
n pi
t Mui
e Sa
ltLak
e 40
°31'
15"
1120
08'4
2"
Porp
hyry
Cu
M05
8105
B
lue
Hill
Pro
spec
t W
asat
eh
M05
7559
C
arrF
orkM
uie
Too
ele
Bou
twel
l, 19
05
Bra
y an
d W
ilson
, 197
5 B
utle
r and
oth
ers,
192
0 C
ook,
196
1 E
iler
s,
1913
E
&M
J2,
1977
Q
uiri
ng,
1962
U
npub
. dat
a*
40°3
2'18
" 11
1°00
17"
PGE
-enr
iche
d bl
ack
shal
e D
oe! I
ing,
19
72fv
\f\
nri
/v1
*»
l\^
i.A
.tJ
-tA
*-
*fA
J
40°3
1'53
" m
0!!^
"
Cus
karn
B
outw
ell,
1905
Bra
y an
d W
ilson
, 197
5 B
utle
r and
oth
ers,
192
0 C
amer
on a
nd G
arm
oe,
1987
C
ook,
196
1 U
npub
. dat
a*
Byp
rodu
ct P
GE
in s
mel
ter r
etur
ns (a
mou
nt
unkn
own)
8.2
oz/to
n R
h av
g. in
sha
le s
ampl
es (
wet
0.01
oz/
ton
Pt ,
0.28
oz/
ton
Pd m
ax. i
n m
iner
aliz
ed li
mes
tone
(fire
ass
ay)
Tabl
e 1.
List
of p
latin
um-g
roup
-ele
men
t (PG
E) o
ccur
renc
es w
ithin
the
cont
erm
inou
s U
nite
d St
ates
that
are
con
tain
ed in
the
U.S
. Geo
logi
cal S
urve
y's
Min
eral
Res
ourc
e D
ata
Syst
em (
MR
DS)
Con
tinue
dM
ap
num
ber
MR
DS
reco
rd
num
ber
Prop
erty
nam
eC
ount
yLa
titud
e (n
orth
)Lo
ngitu
de
(wes
t)D
epos
it ty
pe
(Pub
lishe
d m
odel
nam
es
used
whe
re a
pplic
able
)
Ref
eren
ces
cite
d in
MR
DS
reco
rds
Lev
el o
f PG
E k
now
ledg
e
Uta
h C
ontin
ued
D * 3 * 4 D *
DB
0179
1
MP0
0057
M04
5475
M05
7667
M04
5476
M04
5472
DB
0181
1
M04
5474
Col
orad
o R
iver
Pla
cers
Gol
d C
oin
Kite
Hor
sesh
oe B
end
Jens
en
Kai
paro
wits
Klo
ndik
e B
ar
Split
Mou
ntai
n G
orge
Gar
field
San
Juan
Gar
field
Uin
tah
Emer
y
Kan
e
Kan
e
Uin
tah
37°4
8'42
"
37°3
531"
37°4
8'50
"
40°1
4'41
"
40°2
2'11
"
37°0
638"
37°0
6'40
"
40°2
5'14
"
110°
27'4
6"
110°
35'4
9"
110°
27'1
8"
109°
31'0
7"
109°
20'0
3"
nror
i4"
1110
01'5
8"
109°
14'2
9"
Plac
er A
u-PG
E
Plac
er A
u-PG
E
Plac
er A
u-PG
E
Plac
er A
u-PG
E
Plac
er A
u-PG
E
Plac
er A
u-PG
E
Plac
er A
u-PG
E
Plac
er A
u-PG
E
Doe
llin
g,
1975
H
unt
and
othe
rs,
1953
Jo
hnso
n, 1
973b
But
ler
and
othe
rs,
1920
John
son,
197
3bD
ay a
nd R
icha
rds,
190
6 G
rego
ry a
nd M
oore
, 19
31
Hun
t an
d ot
hers
, 19
53
John
son,
197
3b
O'N
eill
an
d G
unni
ng,
1934
But
ler
and
othe
rs,
1920
John
son,
197
3bD
ay a
nd R
icha
rds,
190
6Jo
hnso
n, 1
973b
Gre
gory
and
Moo
re,
1931
Q
uiri
ng,
1962
But
ler
and
othe
rs,
1920
G
ergo
ry a
nd M
oore
, 19
31
Hun
t an
d ot
hers
, 19
53
John
son,
197
3bJo
hnso
n, 1
973b
O
'Nei
ll
and
Gun
ning
, 19
34
0.15
ozA
on P
t in
blac
k sa
nd, c
once
ntra
tion
fact
or n
ot k
now
n (a
naly
tical
met
hod
unkn
own)
Unv
erif
ied
repo
rt o
f PG
E
$4.5
0/to
n Pt
in c
once
ntra
tes,
con
cent
ratio
n fa
ctor
not
kno
wn
Unv
erifi
ed re
port
of P
GE
0.00
06 g
Pt f
rom
ass
ay b
utto
n w
eigh
ing
0.21
42 g
Unv
erif
ied
repo
rt o
f PG
E
Unv
erif
ied
repo
rt o
f PG
E
Unv
erif
ied
repo
rt o
f PG
E
Ver
mon
t1
W03
3060
Hin
chm
an P
rosp
ect
Win
dsor
43°3
1'10
"07
2°39
'42"
Unk
now
nP
erki
ns,
1904
, 19
30
Unp
ub. d
ata
Pulp
sam
ple
said
to c
onta
in 0
.25
oz/to
n Pt
(a
naly
tical
met
hod
unkn
own)
Virg
inia
* 1
W03
1173
MP0
0248
Col
leen
Pro
spec
t
Unn
amed
PG
E
occu
rren
ce
Nel
son
Lou
doun
37°4
2'44
fl
39°0
1'17
"
078°
56'1
7"
077°
36'1
2"
Unk
now
n
Mag
mat
ic s
egre
gatio
n (n
o m
odel
)
Unp
ub. d
ata*
Fro
elic
h an
d ot
hers
, 19
91
Got
tfri
ed a
nd F
roel
ich,
19
88
Got
tfri
ed a
nd o
ther
s,
1989
Una
ble
to fi
nd s
ourc
e of
PG
E d
ata
(pre
sum
ed to
be
unpu
b. d
ata)
41 p
pb P
t, 50
0 pp
b Pd
max
. in
rock
sam
ples
(f
ire a
ssay
)
Was
hing
ton
MP0
0077
A
naco
rtes
Skag
it
1 M
P000
76
Bea
rds
Hol
low
Pla
cer
Paci
fic
2 M
7004
42
Ced
ar C
reek
Pla
cer
Cla
llam
MP0
0074
C
hina
Cam
p Pl
acer
K
ittita
s Q
elH
um
TCi'l
itas
48°3
0X)9
" 12
2°37
'25"
Po
difo
rm c
hrom
ite
46°1
8'21
" 12
4°03
'46"
Pl
acer
Au-
PGE
48°0
0'53
" 12
4°40
3S"
Plac
er A
u-PG
E
47°2
5'00
" 12
1°O
SW
Plac
er A
u-PG
E47
°75'
53"
m°0
3'15
" La
terit
ic>&
Day
and
Ric
hard
s, 1
906
Der
key
and
othe
rs, 1
990
Hun
ttin
g,
1956
D
ay a
nd R
icha
rds,
1906
H
untt
ing,
19
56
Der
key
and
othe
rs,
1990
H
untt
ing,
19
55
Pard
ee,
1929
H
untt
ing,
19
56C
TT
vafl
, 1°
^5,1
973
Der
key
and
othe
rs, 1
990
Lam
ey a
nd H
otz,
195
1 U
npub
. da
ta
$.41
/ton
Au+
Pt in
nat
ural
bla
ck s
and
$.58
oz/
ton
Pt in
nat
ural
bla
ck s
and
(gra
de:
abou
t 663
ppb
)Sm
all b
ypro
duct
PG
E p
rodu
ctio
n (a
bout
5
oz)
Unv
erif
ied
repo
rt o
f PG
E
Ura
bls
to fi
nd "
O"r
^ of
PG
E ^
a
M05
6163
C
omst
oCk
MM
5061
Fo
rtC
anby
M04
S063
H
oqiri
am
MP0
0075
L
eRoy
M04
S064
Le
adbe
tter P
oint
MP0
0073
Le
aven
wor
th P
lace
r
M05
6657
Li
ttle
Cho
paka
Cla
ims
M04
S066
M
ad C
reek
M70
0274
M
ocU
ps P
lace
r
M04
5065
N
ahco
tta
M04
S068
N
egro
Cre
ek
M06
01S8
N
ew L
ight
Min
e
10
MP0
0078
O
kano
gan
* M
P000
81
Oro
Fino
11
M04
S072
O
zette
Bea
ch P
lace
r
12
M04
5062
Po
int B
row
n
13
M04
5060
Po
mer
oy
* M
7001
88
Prim
ary
Gol
d M
ine
14
M70
0343
R
eady
Cas
h C
laim
* M
P000
79
Riv
ersi
de
Ferr
y
Paci
fic
48°5
8'00
" 11
8°33
'06"
Syen
ite-h
oste
d C
u-A
g-
PGE
(no
mod
el)
46°1
7-0r
12
4°03
W
Plac
er A
u-PG
E
Gra
ys H
arbo
r 46
°58'
16"
123°
5239
" Pl
acer
Au-
PGE
Snoh
omis
h 47
°59'
18"
121°
26'0
4"
Paci
fic
46°3
837"
12
4°02
'57"
Che
lan
47°3
5'54
" 12
0°38
'58"
Oka
noga
n 48
°573
9"
119°
41'4
8"C
hela
n 47
°493
8"
120°
32'2
1"
Unk
now
n
Plac
er A
u-PG
E
Plac
er A
u-PG
E
Podi
form
chr
omite
Pl
acer
Au-
PGE
Gra
ys H
arbo
r 47
°14'
25"
124°
13>0
0"
Plac
er A
u-PG
E
Paci
fic
46°2
9'45
" 12
4001
'51"
Pl
acer
Au-
PGE
Che
lan
47°2
638"
12
0°39
'40"
Pl
acer
Au-
PGE
Wha
tcom
48
°45'
41"
12Q
°433
2"
Poly
met
allic
vei
ns?
Oka
noga
n 48
021'
12"
119°
3533
" U
nkno
wn
Oka
noga
n 48
°53'
56"
119°
30'4
4"
Plac
er A
u-PG
Eda
llam
48
°123
3"
124°
4130
" Pl
acer
Au-
PGE
Gra
ys H
arbo
r 46
°553
8"
124°
10'2
5"
Plac
er A
u-PG
E
Gar
field
46°2
837"
11
7°35
'57"
Pl
acer
Au-
PGE
Skam
arria
46
°21'
45"
121°
4737
"
Skag
it 48
°34'
56"
122°
43'1
7"
Plac
er A
u-PG
E; u
nkno
wn
lode
Po
difo
rm c
hrom
ite
Oka
noga
n 48
°30'
11"
119°
30'1
6"
Plac
erA
u-PG
E
Hun
tting
, 19
56M
utsc
hler
and
oth
ers,
198
5Pa
rker
and
Cal
kins
, 196
4 Pu
rdy,
195
1D
ay a
nd R
icha
rds,
190
6 H
untti
ng, 1
956
Par
dee,
19
29
Day
and
Ric
hard
s, 1
906
Hun
tting
, 195
6 P
arde
e,
1929
H
untt
ing,
19
56
Tabo
r and
oth
ers,
1982
D
ay a
nd R
icha
rds,
190
6 P
arde
e,
1929
H
untt
ing,
19
56
Par
dee,
19
29
Hun
ttin
g,
1956
H
untt
ing,
19
56
Par
dee,
19
29
Pat
ty a
nd G
love
r,
1921
D
ay a
nd R
icha
rds,
190
6 H
untt
ing,
19
56
Par
dee,
19
29D
ay a
nd R
icha
rds,
190
6H
untti
ng, 1
956
Par
dee,
19
29D
erke
y an
d ot
hers
, 19
90H
untt
ing,
19
56P
arde
e,
1929
Pat
ty a
nd G
olve
r,
1921
Bur
ning
, 19
81D
erke
y an
d ot
hers
, 19
90H
untti
ng,
1956
Lan
des
and
othe
rs, 1
902
Moe
n,
1969
Hun
ttin
g,
1956
Par
dee,
19
29H
untt
ing,
19
56D
erke
y an
d ot
hers
, 19
90H
untt
ing,
19
55M
erti
e,
1969
Par
dee,
19
29D
ay a
nd R
icha
rds,
190
6 H
untti
ng, 1
956
Par
dee,
19
29
Day
and
Ric
hard
s, 1
906
Hun
ttin
g,
1956
P
arde
e,
1929
H
untt
ing,
19
56
Der
key
and
othe
rs, 1
990
Hun
ttin
g,
1956
P
arde
e,
1929
H
untt
ing,
19
56
Par
dee,
19
29
225
ppb
Pd, 3
.94
ppm
Pt m
ax. i
n su
lfid
e co
ncen
trate
(ana
lytic
al m
etho
d un
know
n)
$.81
/ton
Au+
Pt in
nat
ural
bla
ck s
and
$.02
/ton
Au+
Pt in
nat
ural
bla
ck s
and
Unv
erif
ied
repo
rt o
f PG
E
Trac
e A
u+Pt
in a
naly
sis
of n
atur
al b
lack
sa
nd
Unv
erif
ied
repo
rt o
f PG
E
Unv
erif
ied
repo
rt o
f PG
E
Unv
erif
ied
bypr
oduc
t PG
E p
rodu
ctio
n
$.17
/ton
Au+
Pt in
nat
ural
bla
ck sa
nd
Trac
e A
u+Pt
in a
naly
sis
of n
atur
al b
lack
sa
nd
Unv
erif
ied
bypr
oduc
t PG
E p
rodu
ctio
n
2.6
ozA
on P
t max
. in
assa
ys o
f mill
co
ncen
trate
s (a
naly
tical
met
hod
unkn
own)
Ore
sai
d to
con
tain
0.2
5 oz
/ton
PGE
(a
naly
tical
met
hod
unkn
own)
U
nver
ifie
d re
port
of P
GE
U
nver
ifie
d by
prod
uct P
GE
pro
duct
ion
$.05
/ton
Au+
Pt in
nat
ural
bla
ck s
and
$17.
36/to
n A
u+Pt
in b
lack
-san
d co
ncen
trate
s, c
once
ntra
tion
fact
or n
ot
know
nU
nver
ifie
d re
port
of P
GE
Chr
omite
ore
sai
d to
con
tain
0.2
45 o
z/to
n Pt
m
ax. (
anal
ytic
al m
etho
d un
know
n)
Unv
erif
ied
repo
rt o
f PG
E
Tabl
e 1.
Lis
t of p
latin
um-g
roup
-dem
ent (
PGE)
occ
urre
nces
with
in th
e co
nter
min
ous
Uni
ted
Stat
es th
at a
re c
onta
ined
in th
e U
.S. G
eolo
gica
l Sur
vey'
s M
iner
al R
esou
rce
Dat
a Sy
stem
(M
RD
S) C
ontin
ued
Map
M
RD
S Pr
oper
ty n
ame
Cou
nty
Latit
ude
Long
itude
D
epos
it ty
penu
mbe
r re
cord
(n
orth
) (w
est)
(Pub
lishe
d m
odel
nam
esnu
mbe
r _
__
__
use
d w
here
app
licab
le)
Ref
eren
ces
cite
d in
MR
DS
reco
rds
Leve
l of P
GE
kno
wle
dge
Was
hing
ton
Con
tinue
dM
0450
74
Rog
ers
Bar
Pla
cer
Ferr
y 48
°05'
20"
15
M04
5073
Sn
i Shi
Bea
ch P
lace
r C
lalla
m
48°1
5'19
"
118°
14'1
2"
Plac
erA
u-PG
E
124°
41'0
1"
Plac
erA
u-PG
E
16
M04
5069
Si
milk
amee
nPla
cers
O
kano
gan
48°5
6'23
" 11
9°26
'47"
Pl
acer
Au-
PGE
* M
P000
80
Slat
e C
reek
Pla
cer
Oka
noga
n 48
°59'
10"
119°
34'1
7"
Plac
erA
u-PG
E
17
M04
5077
So
uth
Fork
Lew
is
Cla
rk
45°4
8'51
" 12
2018
'57"
Pl
acer
Au-
PGE
R
iver
18
M04
5076
Su
nset
Cre
ek P
lace
r da
llam
47°5
9'20
" 12
4°40
'17"
Pl
acer
Au-
PGE
* M
0561
68
Wal
laW
alla
Fe
rry
48°5
8'12
" 11
8°33
'03"
U
nkno
wn
19
M04
5075
Y
ello
w B
anks
Pla
cer
dall
am
48°0
5'40
" 12
4°41
'10"
Pl
acer
Au-
PGE
Col
lier,
19
07D
erke
y an
d ot
hers
, 19
90H
untt
ing,
19
55D
ay a
nd R
icha
rds,
190
6D
erke
y an
d ot
hers
, 19
90H
untt
ing,
19
55Pa
rdee
, 19
29D
erke
y an
d ot
hers
, 199
0 H
untt
ing,
19
56
Pard
ee,
1929
Pa
tty
and
Glo
ver,
192
1 H
untt
ing,
19
56
Hun
ttin
g,
1955
M
ertie
, 19
69
Pard
ee,
1929
Pa
tty
and
Glo
ver,
192
1 D
erke
y an
d ot
hers
, 19
90
Hun
ttin
g,
1955
Pa
rdee
, 19
29
Hun
ttin
g,
1956
Hun
ttin
g,
1955
Pard
ee,
1929___
__
__
Tra
ce P
t rep
orte
d in
ass
ay o
f ore
(an
alyt
ical
m
etho
d un
know
n)
$613
.50A
on P
t in
conc
entr
ates
, co
ncen
tratio
n fa
ctor
not
kno
wn
Unv
erifi
ed b
ypro
duct
PG
E p
rodu
ctio
n
Unv
erif
ied
repo
rt o
f PG
E
Smal
l byp
rodu
ct P
GE
pro
duct
ion
(abo
ut l
.S
oz)
Smal
l byp
rodu
ct P
GE
pro
duct
ion
(abo
ut 5
oz
)
Unv
erifi
ed re
port
of P
GE
U
nver
ifie
d by
prod
uct P
GE
pro
duct
ion
Wyo
min
gW
0321
15
Alb
any
Plac
ers
Alb
any
41°1
230"
M04
5442
A
rche
r Pla
cer C
laim
A
lban
y 41
°16'
02"
M04
5438
B
ear C
reek
A
lban
y 41
°12'
48"
M04
5445
B
lanc
he M
ine
Alb
any
41°1
3'05
"
MP0
0082
B
road
way
C
arbo
n 41
°02'
47"
M04
5447
C
ente
nnia
l Min
e A
lban
y 41
°17'
48"
M04
5453
C
liff M
ine
Alb
any
41°1
634"
M04
5450
C
olum
bine
Min
e A
lban
y 41
°15'
52"
M04
5436
D
aves
Cre
ek
Alb
any
41°m
r
M04
5444
D
uche
ss M
ine
Alb
any
41°1
3'14
"
106°
15'4
0"
loe^
s-se-
106°
17'0
8"
Plac
erA
u-PG
E
Plac
erA
u-PG
E
Plac
erA
u-PG
E
New
Ram
bler
Cu-
Au-
PG
E (n
o m
odel
)
106°
45'0
7"
Und
eter
min
ed m
assi
ve
sulfi
de10
6°09
'25"
N
ew R
ambl
er C
u-A
u-
PGE
(no
mod
el)
1060
11'0
4"
New
Ram
bler
Cu-
Au-
PG
E (n
o m
odel
)
106°
11 '1
7"
New
Ram
bler
Cu-
Au-
PG
E (n
o m
odel
)%j7
" T
lace
r Au
To£
106°
18'0
1"
New
Ram
bler
Cu-
Au-
PG
E (n
o m
odel
)
Hau
sel,
1980
, 19
89
Ost
erw
ald
and
othe
rs,
1966
Hau
sel,
1980
, 19
89
McC
allu
m,
1968
Hau
sel,
1989
McC
allu
m a
nd O
rbac
h, 1
968
Hau
sel,
1989
McC
allu
m a
nd O
rbac
h, 1
968
Hau
sel,
1989
Ost
erw
ald
and
othe
rs,
1966
Bee
ler,
1906
H
ause
l, 19
89
McC
allu
m, 1
968
Hau
sel,
1980
, 19
89H
ess,
19
26M
cCal
lum
, 19
68H
ause
l, 19
80,1
989
McC
allu
m,
1968
SeeJ
er,
1905
Hau
sel,
1989
McC
allu
m a
nd O
rbac
h, 1
968
Hau
sel,
1989
McC
allu
m a
nd O
rbac
h, 1
968
$5-6
Aon
Pt i
n bl
ack
sand
con
cent
rate
s (v
isua
l ide
ntif
icat
ion
pres
umed
) U
nver
ifie
d re
port
of P
GE
Unv
erifi
ed re
port
of P
GE
17 p
pm P
t, 30
ppm
Pd
max
. fro
m h
igh-
gr
ade
limon
ite sa
mpl
e fr
om d
ump
(fire
as
say
pres
umed
)Tr
ace
PGE
in c
hann
el s
ampl
e (a
naly
tical
m
etho
d un
know
n)U
nabl
e to
find
sou
rce
of P
GE
dat
a
Unv
erifi
ed re
port
of P
GE
Unv
erifi
ed re
port
of P
GE
Um
rrfi
<J r
epor
t ^f
?G!I
Una
ble
to fi
nd s
ourc
e of
PG
E d
ata
M04
5437
E
lk C
reek
A
lban
y
M04
S4S1
Em
pire
Min
e A
lban
y
M04
5440
Fa
ll C
reek
Pla
cer
Alb
any
M04
5452
Fr
ee G
old
Cla
im
Alb
any
W03
2147
G
olde
n C
row
n M
inin
g A
lban
y Sy
ndic
ate
FS00
029
Gro
s V
entr
e N
os.
1-16
Te
ton
Gro
up
M04
S443
In
depe
nden
ce M
ine
Alb
any
M04
S439
In
depe
nden
ce P
lace
r A
lban
y
M04
5449
K
entu
cky
Der
by M
ine
Alb
any
W03
2386
La
ke C
reek
Min
e A
lban
y
MP0
0107
L
ake
Ow
en c
ompl
ex
Alb
any
MP0
0086
Li
ncol
n G
ulch
A
lban
yM
0454
35
Moo
re's
Gul
ch
Alb
any
M04
S4SS
N
ew R
ambl
er M
ine
Alb
any
M04
S448
Pl
atin
um C
ity M
ine
Alb
any
M04
5441
Q
ueen
MiU
Run
A
lban
y
M04
S4S4
Q
ueen
Min
e A
lban
y
W03
2121
R
ock
Cre
ek P
lace
tsFr
emon
t
4101
2'56
" 10
6°15
'25"
Pl
acer
Au-
PGE
41°1
6'26
" 10
6°11
36"
New
Ram
bler
Cu-
Au-
PG
E (n
o m
odel
)
41°1
7'07
" 10
6°11
34"
Plac
erA
u-PG
E
41°1
6'48
" IQ
6°IQ
?Q"
New
Ram
bler
Cu-
Au-
PG
E (n
o m
odel
)
41°1
7'13
" 10
6°09
38"
New
Ram
bler
Cu-
Au-
PGE
(no
mod
el)
43°3
3'06
" 11
0°15
30"
Plac
erA
u-PG
E
41°1
6'54
" 10
6°11
'03"
N
ew R
ambl
er C
u-A
u-
PGE
(no
mod
el)
i" 10
6°11
'05"
Pl
acer
Au-
PGE
MO
S482
7 Si
lver
Cro
wn
Dis
trict
La
ram
ie
41°1
7'10
" 10
6°10
'46"
N
ew R
ambl
er C
u-A
u-
PGE
(no
mod
el)
41°O
T14"
10
6°13
'42"
N
ew R
ambl
er C
u-A
u-
PGE
(no
mod
el)
41°0
7'56
" 10
6°09
'05"
M
eren
sky
Ree
f PG
E?
41°0
6'54
" 10
6°09
33"
Plac
erA
u-PG
E
41°1
1'57
" 10
6°15
33"
Plac
erA
u-PG
E
41°1
3'13
" 10
6°16
'52"
N
ew R
ambl
er C
u-A
u-
PGE
(no
mod
el)
41°1
632"
10
6°09
30"
New
Ram
bler
Cu-
Au-
PGE
(no
mod
el)
41°1
716"
10
6°10
39"
Plac
erA
u-PG
E
41°1
674"
10
6°09
'57"
N
ew R
ambl
er C
u-A
u-
PGE
(no
mod
el)
42°2
333M
10
8°43
'44"
Pl
acer
Au-
PGE
41°0
8'40
" 10
5°08
39"
Porp
hyry
Cu-
Au;
po
lym
etal
lic v
eins
Hau
sel,
1989
McC
allu
m a
nd O
rbac
h, 1
968
Hau
sel,
1980
, 19
89H
ess,
19
26M
cCal
lum
, 19
68H
ause
l, 19
89M
cCal
lum
, 19
68H
ause
l, 19
80,1
989
Hes
s,
1926
McC
allu
m,
1968
Hau
sel,
1989
Ost
erw
ald
and
othe
rs,
1966
Unp
ub. d
ata*
Hau
sel,
1980
, 19
89
McC
allu
m,
1968
O
ster
wal
d an
d ot
hers
, 19
66
Hau
sel,
1980
H
ess,
19
26
McC
allu
m,
1968
H
ause
l, 19
80,
1989
M
cCal
lum
, 19
68
Hau
sel,
1980
, 19
89
Ost
erw
ald
and
othe
rs, 1
966
Lou
cks,
19
91
Hau
sel,
1989
Bee
ler,
19
06H
ause
l, 19
89M
cCal
lum
and
Orb
ach,
196
8O
ster
wal
d an
d ot
hers
, 19
66D
ay a
nd R
icha
rds,
190
6E
mm
ons,
19
03L
ind
and
othe
rs,
1923
McC
allu
m a
nd o
ther
s, 1
976
McC
allu
m a
nd O
rbac
h, 1
968
Taf
t, 19
18T
heob
ald
and
Tho
mps
on,
1968
Hau
sel,
1980
, 19
89M
cCal
lum
, 19
68H
ause
l, 19
89M
cCal
lum
, 19
68H
ause
l, 19
89H
ess,
19
26M
cCal
lum
, 19
68A
rmst
rong
, 194
8H
ause
l, 19
80, 1
989
Unp
ub. d
ata*
Bec
kman
and
Ker
ns, 1
965
Hau
sel,
1989
Ost
erw
ald
and
othe
rs,
1966
Unp
ub. d
ata
Unv
erif
ied
repo
rt o
f PG
E
1.04
oz/
tpn
Pt, 6
3.72
oz/
ton
Pd, 2
.84
ozA
on
Ir m
ax. i
n ru
sty
rock
sam
ples
(an
alyt
ical
m
etho
d un
know
n)U
nver
ifie
d re
port
of P
GE
Unv
erif
ied
repo
rt o
f PG
E
0.84
oz/
ton
Pt m
ax. i
n or
e sa
mpl
es
(ana
lytic
al m
etho
d un
know
n)
Una
ble
to fi
nd s
ourc
e of
PG
E d
ata
0.22
oz/
ton
Pt, 0
.019
2 oz
/ton
Pd, 0
.46
oz/to
n Ir
, 0.3
02 o
z/to
n R
h, 0
.100
2 oz
/ton
Os
max
. in
ore
sam
ples
(an
alyt
ical
met
hod
unkn
own)
Unv
erifi
ed re
port
of P
GE
0.1
oz/to
n Pt
in ro
ck s
ampl
e (f
ire
assa
y)
250
ppb
Pt, 4
0 pp
b Pd
in v
ein
mat
eria
l (fir
eas
say
pres
umed
) 93
5 pp
b Pt
, 5 p
pb P
d m
ax. i
n ro
ck s
ampl
esfr
om m
iner
aliz
ed z
ones
(fir
e as
say
pres
umed
)U
nver
ified
repo
rt o
f PG
E
Unv
erifi
ed re
port
of P
GE
621
oz P
t+Pd
pro
duce
d
Unv
erif
ied
repo
rt o
f PG
E
Ore
mat
eria
l sai
d to
con
tain
trac
es o
f PG
E(a
naly
tical
met
hod
unkn
own)
0.
03 o
z/to
n Pt
, 0.0
5 oz
/ton
Ir in
gou
gesa
mpl
e (a
naly
tical
met
hod
unkn
own)
Una
ble
to fi
nd s
ourc
e of
PG
E d
ata
Unv
erifi
ed re
port
of P
GE
Tabl
e 1.
List
of p
latin
um-g
roup
-ele
men
t (PG
E) o
ccur
renc
es w
ithin
the
cont
erm
inou
s U
nite
d St
ates
that
are
con
tain
ed in
the
U.S
. Geo
logi
cal S
urve
y's
Min
eral
Res
ourc
e D
ata
Syst
em (
MR
DS)
Con
tinue
dM
ap
num
ber
MR
DS
reco
rd
num
ber
Prop
erty
nam
eC
ount
yLa
titud
e (n
orth
)Lo
ngitu
de
(wes
t)D
epos
it ty
pe
(Pub
lishe
d m
odel
nam
es
used
whe
re a
pplic
able
)
Ref
eren
ces
cite
d in
MR
DS
reco
rds
Leve
l of P
GE
kno
wle
dge
Wyo
min
g C
ontin
ued
10
11 *
MP0
0084
MP0
0083
M04
S446
Unn
amed
pro
spec
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