analytical results and sample locality map of stream ...united states department of the interior u....

UNITED STATES DEPARTMENT OF THE INTERIOR

U. S. GEOLOGICAL SURVEY

Analytical results and sample locality map

of stream sediment, heavy-mineral-concentrate, and rock samples

from the Cougar Canyon, Tunnel Spring Wilderness Study Area,

(UT-040-123/NV-050-166), Lincoln County, Nevada, and

Washington County, Utah.

By

Philip L. Hageman, * Harley D. King, * Betty Adrian, *

and David Fey*

Open-File Report 92-207 A Paper versionB Diskette version

This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards (or with the North American Stratigraphic Code). Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

"U.S. Geological Survey, DFC, Box 25046, MS 973, Denver, CO 80225

1992

CONTENTSPage

Studies Related to Wilderness ..................................... 1Introduction ................................................. 1Methods of Study ............................................. 1

Sample Media ............................................ 1Sample Collection .......................................... 3

Stream-sediment samples ................................. 3Heavy-mineral-concentrate samples ......................... 3Rock samples ......................................... 3

Sample Preparation ......................................... 3Sample Analysis ........................................... 5

Spectrographic method .................................. 5Chemical methods ..................................... 5

Rock Analysis Storage System .................................... 5Description of Data Tables ....................................... 6Acknowledgments ............................................. 6References Cited .............................................. 7

ILLUSTRATIONS

Figure 1. Location map of the Cougar Canyon/Tunnel Spring Wilderness Study Area, Lincoln County, Nevada, and Washington County, Utah ..................... 2

Figure 2. Location map of heavy-mineral-concentrate, stream-sediment, and rock samples from the Cougar Canyon/Tunnel Spring Wilderness Study Area, Lincoln County, Nevada, and Washington County, Utah .................................... 4

TABLES

Table 1. Limits of determination for spectrographic analysis of rocks and streamsediments ............................................... 8

Table 2. Chemical methods used .................................. 9Table 3. Results of analyses of stream-sediment samples .................. 10Table 4. Results of analyses of heavy-mineral-concentrate samples ........... 14Table 5. Results of analyses of rock samples .......................... 17Table 6. Description of rock samples ............................... 21

STUDIES RELATED TO WILDERNESS

Bureau of Land Management Wilderness Study AreasThe Federal Land Policy and Management Act (Public Law 94-579, October 21, 1976)

requires the U.S. Geological Survey and the U.S. Bureau of Mines to conduct mineral surveys on certain areas to determine their mineral resource potential. Results must be made available to the public and be submitted to the President and the Congress. This report presents the results of a geochemical survey of the Cougar Canyon/Tunnel Spring Wilderness Study Area, Lincoln County Nevada, and Washington County, Utah.

INTRODUCTION

In May 1988, the U.S. Geological Survey conducted a reconnaissance geochemical survey of the Cougar Canyon/Tunnel Spring Wilderness Study Area, (UT-040- 123/NV-050-166), Lincoln County, Nevada, and Washington County, Utah.

The Cougar Canyon/Tunnel Spring Wilderness Study Area comprises about 10 mi2 (26km2) in the western part of Washington County, Utah and the eastern part of Lincoln County, Nevada and lies about 25 mi (40km) east of Caliente, Nevada and about 50 mi (80 km) southwest of Cedar City Utah, (see fig. 1). Access to the study area is provided on the west by an improved light duty road leading east from Caliente and U.S. Highway 93 to Acoma, Nevada, and from there to Beaver Dam State Park via a dirt road. The area is also accessable on the east by a dirt road leading from Utah Highway 120 to Pine Park Canyon.

The study area is situated on a broad, elevated, and deeply dissected volcanic plateau and is underlain by a thick section of dacitic to rhyolitic ash-flow and air-fall tuff of Miocene age, which is derived from the nearby Caliente caldera complex. Rock formations exposed in the study area are described in Conrad and others (1990).

Elevations range from about 5000 ft (1,524 m) at the bottom of Beaver Dam Wash, on the west side of the study area, up to about 6,200 ft (1,890 m) on the plateau, giving a topographic relief of about 1,200 ft (366 m). The highest point is about 7,000 ft (2,134 m) on Big Mountain at the southeast end of the study area. The climate is semiarid.

METHODS OF STUDY

Sample Media

Analyses of the stream-sediment samples represent the chemistry of the rock material eroded from the drainage basin upstream from each sample site. Such information is useful in identifying those basins which contain concentrations of elements that may be related to mineral deposits. Heavy-mineral-concentrate samples provide information about the chemistry of certain minerals in rock material eroded from the drainage basin upstream from each sample site. The selective concentration of minerals, many of which may be ore related, permits determination of some elements that are not easily detected in stream-sediment samples.

Analyses of unaltered or unmineralized rock samples provide background geochemical data for individual rock units. On the other hand, analyses of altered or mineralized rocks, where

1

114-W

BEAVER DAM STATE PARK

Enterprise Reservoir

APPROXIMATE BOUNDARYOF

COUGAR CANYON/TUNNEL SPRINGWILDERNESS STUDY AREA

(UT-040-123/NV-050-166) BULL VALLEY

MOUNTAINS

Figure 1. Index map of the Cougar Canyon/Tunnel Spring Wilderness Study Area,

Lincoln County, Nevada, and Washington County, Utah.

present, may provide useful geochemical information about the major- and trace-element assemblages associated with a mineralizing system.

Sample Collection

Stream-sediment samples were collected at 34 sites and heavy-mineral-concentrate samples were collected at 32 sites (fig 2). Rock samples were collected at 26 sites. Sampling density was about one sample site per 0.7 mi2 for the stream sediments and heavy- mineral concentrates, and about one sample site per 1.0 mi2 for the rocks. The area of the drainage basins sampled ranged from about 0.3 mi2 to 4.00 mi2.

Stream-sediment samples

The stream-sediment samples consisted of active alluvium collected primarily from first-order (unbranched) and second-order (below the junction of two first-order) streams as shown on USGS topographic maps. Each sample was a composite derived from several localities within an area that may extend as much as 50 ft from the center of the symbol plotted on the map.

Heavy-mineral-concentrate samples

Heavy-mineral-concentrate samples were collected from the same active alluvium as the stream-sediment samples. Each bulk sample was screened with a 2.0-mm (10-mesh) screen to remove the coarse material. The less than 2.0-mm fraction was panned until most of the quartz, feldspar, organic material, and clay-sized material was removed.

Rock samples

Rock samples were collected from various types of occurrences in the vicinity of the plotted site location. Descriptions of rock samples are in table 6.

Sample Preparation

The stream-sediment samples were air dried, then sieved using 80-mesh (0.17-mm) stainless- steel sieves. The portion of the sediment passing through the sieve was saved for analysis.Samples that had been panned in the field were air dried and sieved to minus-35 mesh; bromoform (specific gravity 2.85) was used to remove the remaining quartz and feldspar. The resultant heavy-mineral sample was separated into three fractions using a large electromagnet (in this case a modified Frantz Isodynamic Separator). The most magnetic material (removed at a setting of 0.25 ampere), primarily magnetite, was not analyzed. The second fraction (removed at a setting of 1.75 ampere), largely ferromagnesian silicates and iron oxides, was saved for archival storage. The third fraction (the nonmagnetic material which may include the nonmagnetic ore minerals, zircon, sphene, etc.) was split using a Jones splitter. One split was hand ground for spectrographic analysis; the other split was saved for mineralogical analysis. (These magnetic separates are the same separates that would be produced by using a Frantz

, X..c..,.!\.V

THE COUGAR CANYON -TUNNEL SPRING

Figure 2. Localities of heavy-mineral-concentrate, stream-sediment, and rock samples from

the Cougar Canyon/Tunnel Spring Wilderness Study Area, Lincoln County, Nevada, and

Washington County, Utah.

Isodynamic Separator set at a slope of 15° and a tilt of 10° with a current of 0.2 ampere to remove the magnetite and ilmenite, and a current of 0.6 ampere to split the remainder of the sample into paramagnetic and nonmagnetic fractions.)

Rock samples were crushed and then pulverized to minus 0.15 mm with ceramic plates.

Sample Analysis

Spectrographic method

The stream-sediment and rock samples were analyzed for 35 elements and the heavy-mineral- concentrate samples were analyzed for 37 elements using a semiquantitative, direct-current arc emission Spectrographic method (modification of Grimes and Marranzino, 1968). Heavy-mineral- concentrate samples were analyzed for the same elements plus platinum and palladium. The elements analyzed and their lower limits of determination are listed in table 1. Spectrographic results were obtained by visual comparison of spectra derived from the sample against spectra obtained from standards made from pure oxides and carbonates. Standard concentrations are geometrically spaced over any given order of magnitude of concentration as follows: 100, 50, 20, 10, and so forth. Samples whose concentrations are estimated to fall between those values are assigned values of 70, 30, 15, and so forth. The precision of the analytical method is approximately plus or minus one reporting interval at the 83 percent confidence level and plus or minus two reporting intervals at the 96 percent confidence level (Motooka and Grimes, 1976). Values determined for the major elements (iron, magnesium, calcium, sodium, phosphorus, and titanium) are given in weight percent; all others are given in parts per million (micrograms/gram). Analytical data are listed in tables 3, 4, and 5 for stream-sediment, heavy-mineral-concentrate, and rock samples, respectively.

Chemical methods

Samples from this study area were also analyzed by other analytical methods. Rocks and stream sediments were analyzed by inductively coupled plasma emission spectroscopy (ICP), and atomic absorption spectroscopy (AA). Arsenic (As), bismuth (Bi), cadmium (Cd), antimony (Sb), and zinc (Zn) were analyzed by ICP, gold (Au) was analyzed by flame AA, and mercury (Hg) by cold vapor AA. See table 2 for limits of determination and references.

Analytical results using these methods are listed in tables 3 and 5.

ROCK ANALYSIS STORAGE SYSTEM

Upon completion of all analytical work, the analytical results were entered into a computer- based file called Rock Analysis Storage System (RASS). This data base contains both descriptive geological information and analytical data. Any or all of this information may be retrieved and converted to a binary form (STATPAC) for computerized statistical analysis or publication (VanTrump and Miesch, 1977).

DESCRIPTION OF DATA TABLES

Tables 3-5 list the results of analyses for the samples of stream sediment, heavy-mineral- concentrate, and rock samples respectively. For the three tables, the data are arranged so that column 1 contains the USGS-assigned sample numbers. These numbers correspond to the numbers shown on the site location map (fig. 2). Columns in which the element headings show the letter "s" below the element symbol are emission spectrographic analyses; "aa" indicates atomic absorption analyses, "cvaa" indicates cold vapor atomic absorption analysis; and "icp" indicates inductively coupled plasma-atomic emission spectroscopy; A letter "N" in the tables indicates that a given element was looked for but not detected at the lower limit of determination shown for that element. For emission spectrographic analyses, a "less than" symbol (<) entered in the tables in front of the lower limit of determination indicates that an element was observed but was below the lowest reporting value. For AA and ICP analyses, a "less than" symbol (<) entered in the tables in front of the lower limit of determination indicates that an element was below the lowest reporting value. If an element was observed but was above the highest reporting value, a "greater than" symbol (>) was entered in the tables in front of the upper limit of determination. If an element was not looked for in a sample, two dashes (--) are entered in place of an analytical value. Because of the formatting used in the computer program that produced tables 3-5, some of the elements listed in these tables (Fe, Mg, Ca, Ti, Ag, and Be) may carry one or more nonsignificant digits to the right of the significant digits. The analysts did not determine these elements to the accuracy suggested by the extra zeros.

ACKNOWLEDGMENTS

The authors wish to thank Steve McDanal for assistance with sample collection, and M.S. Erickson and Bruce Roushey for their assistance in the analysis of these samples.

REFERENCES CITED

Conrad, I.E., King, H.D., Blank, H. R., and Murphy, G.P., 1990, Mineral resources of the GigrCanyon/Tunnel Spring Wilderness Study Area, Washington County, Utah, and LincolnCounty, Nevada: U.S. Geological Survey Open-File Report 90-331.

Crock, J.G., Briggs, P. H., Jackson, L. L., and Lichte, F. E., 1987, Analyticalmethods for the analysis of stream sediments and rocks from Wilderness Study Areas:U.S. Geological Survey Open-File Report 87-84, 35 p.

Grimes, D. J., and Marranzino, A. P., 1968, Direct-current arc and alternating-current sparkemission spectrographic field methods for the semiquantitative analysis of geologicmaterials: U.S. Geological Survey Circular 591, 6 p.

Koirtyohann, S. R., and Khalil, Moheb, 1976, Variables in the determination of mercury by coldvapor atomic absorption: Analytical Chemistry, 48, p. 136-139.

Motooka, J. M., and Grimes, D. J., 1976, Analytical precision of one-sixth order semiquantitativespectrographic analyses: U.S. Geological Survey Circular 738, 25 p.

Thompson, C. E., Nakagawa, H. M., and Van Sickle, G. H., 1968, Rapid analysis for gold ingeologic materials, in Geological Survey research 1968: U.S. Geological SurveyProfessional Paper 600-B, p. B130-B132.

VanTrump, George, Jr., and Miesch, A. T., 1977, The U.S. Geological Survey RASS-STATPACsystem for management and statistical reduction of geochemical data: Computers andGeosciences, v. 3, p. 475-488.

TABLE 1. Limits of determination for the spectrographic analysis of rocks and stream sediments, based on a 10-mg sajnple

[The spectrographic limits of determination for heavy-mineral-concentrate samples are based on a 5-mg sample, and are therefore two reporting intervals higher than the limits, except as noted]

Elements Lower determination limit Upper determination limit

Percent

Calcium (Ca)Iron (Fe)Magnesium (Mg)Sodium (Na)Phosphorus (P)Titanium (Ti)

.050.05.02

0.20.2.002

2020105

101

Parts per million

Silver (Ag)Arsenic (As)Gold (Au)Boron (B)Barium (Ba)Beryllium (Be)Bismuth (Bi)Cadmium (Cd)Cobalt (Co)Chromium (Cr)Copper (Cu)Gallium (Ga)Germanium (Ge)Lanthanum (La)Manganese (Mn)Molybdenum (Mo)Niobium (Nb)Nickel (Ni)Lead (Pb)Antimony (Sb)Scandium (Sc)Tin (Sn)Strontium (Sr)Thorium (Th)Vanadium (V)Tungsten (W)Yttrium (Y)Zinc (Zn)Zirconium (Zr)Palladium (Pd)*Platinum (Pt)*

0.5200

101020

110201010

55

105010

520

510

1005

10100100

102010

20010

520

5,00010,000

5002,0005,0001,0001,000

5002,0005,000

20,000500100

1,0005,0002,0002,0005,000

20,00010,000

1001,0005,0002,000

10,00010,0002,000

10,0001,0001,0001,000

Determined in heavy-mineral-concentrate samples only mineral-concentrate samples.

Limits are for heavy-

oa

TABLE 2.--Chemical methods used

[AA = atomic absorption; ICP = inductively coupled plasma spectroscopy]

Element or Determination limitconstituent Sample Method (micrograms/ Referencedetermined type gram or ppm)

Gold (Au) rock

Mercury (Hg) rock

Arsenic (As) rockAntimony (Sb) rockZinc (Zn) rockBismuth (Bi) rockCadmium (Cd) rock

AA

CVAA

ICP ICP ICP ICP ICP

.1

0.02

52220.1

Modification of Thompson and others, 1968.

Koirtyohann and Khalil, 1976.

Crock and others, 1987.

09

TABLE 3--ANALYTICAL RESULTS OF STREAM-SEDIMENT SAMPLES FROM THE COUGAR CANYON AND TUNNEL SPRING WILDERNESS STUDYAREAS, LINCOLN COUNTY, NEVADA, AND WASHINGTON COUNTY, UTAH.

[N, not detected; <, detected but below the limit of determination shown; >, determined to be greater than the value shown.]

Sample Latitude Longitude Ca-pct. s

Fe-pct. s

Mg-pct. s

Na-pct. s

P-pct. s

SSSSssssss

ssssssssss

ssssssssss

ssss

37 31 237 30 3337 30 2137 33 4837 33 4537 33 3637 33 3437 33 2737 33 1537 31 56

37 30 2137 30 2137 29 5737 28 637 28 1337 28 2137 28 2437 28 5337 29 2137 39 47

37 30 4937 32 1737 32 3337 33 1637 31 637 31 1837 29 3337 28 5237 28 1037 27 45

37 26 5037 26 5737 30 137 29 0

114 0 55114 0 29114 0 58114 3 40114 3 23114 4 9114 4 8114 4 37114 4 56114 3 21

114 3 34114 3 33114 3 10114 1 26114 1 43114 1 42114 2 33114 3 5114 3 8114 3 16

114 3 20114 5 17114 5 3114 5 10114 1 38114 2 10113 58 30113 59 51113 58 52113 59 5

113 59 5114 0 48114 2 34114 2 18

1.01.02.01.01.5.7.3.5.3.5

.51.02.01.52.05.01.52.02.01.0

.71.01.0.7

1.01.02.02.01.51.0

1.02.0.5

1.0

10.03.0

15.02.01.51.51.02.01.52.0

10.05.0

10.010.015.010.015.010.015.05.0

3.03.03.01.0

10.05.0

10.07.0

20.05.0

10.07.05.03.0

1.0.7

1.01.0.7.5.5.5

5.0.5

.71.01.52.02.02.03.02.02.01.0

.7

.7

.7

.51.01.51.51.51.51.0

1.02.0

.71.0

1.0 .7

1.0 2.0 2.0 2.0 1.0

1.5 1.5 1.0 1.0 1.0 .7

1.0 1.0 1.0 1.0

2.0.7.7

1.51.01.01.0.5

1.0.3

1.5 1.0 1.5 2.0

Ti-pct. s

1.0 .3

.3

.3

.2

.3

.3

.2

.3

1.0.5

1.01.01.0.7I.OI.OI.O.3

.7

.7

.7

.2 1.0 .3

.71.0.5

.7

.7

.3

.2

Ag-ppms

NNNNNNNNNN

NNNNNNNNNN

NNNNNNNNNN

NNNN

As-ppms

NNNNNNNNNN

NNNNNNNNNN

NNNNNNNNNN

NNNN

10

TABLE 3--ANALYTICAL RESULTS OF STREAM-SEDIMENT SAMPLES FROM THE COUGAR CANYON AND TUNNEL SPRING WILDERNESS STUDY AREAS, LINCOLN COUNTY, NEVADA, AND WASHINGTON COUNTY, UTAH. Continued

Sample Au-ppms

NNNNNNNNNN

NNNNNNNNNN

NNNNNNNNNN

NNNN

B-ppmS

15201050302015202020

102020

<10102010151510

102015151010151015

<10

1010

<10<10

Ba-ppm s

500500

1,000500700300100500200200

1,0001,0001,0001,0001,0001,0001,0001,0001,000

500

700700300200

1,000200

1,0001,0001,0001,000

1,0001,500300300

Be-ppms

2.02.01.52.02.02.02.03.03.02.0

1.03.01.5

<1.01.01.0

<1.01.01.52.0

2.02.01.55.01.53.01.01.01.01.0

1.01.5

<1.01.0

Bi-ppms

NNNNNNNNNN

NNNNNNNNNN

NNNNNNNNNN

NNNN

Cd-ppms

NNNNNNNNNN

NNNNNNNNNN

NNNNNNNNNN

NNNN

Co-ppms

201050

<10<10<10<10<10<10<10

15<1020507030705050

<10

<1010

<10<1020

<1030205015

50302030

Cr-ppms

7020

20015201010101010

2020100150200200200150200<10

101510

<1010

<1015015015070

50505070

Cu-ppms

20207050155

<5151015

20153010010070100507010

72015575

70507030

50503020

Ga-ppms

50305030203050505050

70305030503050505030

50302050305030153010

30505030

Ge-ppns

NNNNNNNNNN

NNNNNNNNNN

NNNNNNNNNN

NNNN

11

TABLE 3--ANALYTICAL RESULTS OF STREAM-SEDIMENT SAMPLES FROM THE COUGAR CANYON AND TUNNEL SPRING WILDERNESS STUDY AREAS, LINCOLN COUNTY, NEVADA, AND WASHINGTON COUNTY, UTAH.--Continued

Sampleb

ssssssssss

ssssssssss

ssssssssss

ssss

La-ppms

30050

200N

<50<505050

<5070

150701501005050

<5050100150

707070707010050100<50100

<505010050

Mn-ppns

2,0001,0001,5001,000

7001,0001,0001,5001,5001,000

1,5001,5001,5002,0002,0001,5001,5001,0001,5001,500

1,0001,0001,500700

2,0001,5002,0001,5002,0001,000

1,5001,500200300

Mo-ppms

NNN

<5<5<55

<55

<5

<5<5<5<5<5<5NNNN

NNN5NNNNNN

NNNN

Nb-ppms

302020<20<20<20<2020<2020

202020NNNNN

<20<20

20<2020202030<20

N<20

N

<20N

20N

Ni-ppms

20157010205

<5557

151050100100507050507

5101055

<5100507020

30305020

Pb-ppms

30503020203050503050

20203020202020303020

50302050305030153010

20503020

Sb-ppms

NNNNNNNNNN

NNNNNNNNNN

NNNNNNNNNN

NNNN

Sc-ppms

157

20775

<5557

1510152030152020207

7775

155

20203030

3030710

Sn-ppms

NNNNNNNNNN

NNNNNNNNNN

NNNNNNNNNN

NNNN

Sr-ppms

200300500100100100

<100100100150

200500500

1,0001,000500700700700300

200200150100200150300300500200

500700200300

Th-ppms

NNNNNNNNNN

NNNNNNNNNN

NNNNNNNNNN

NNNN

V-ppms

20050

30050302015502030

10050

20030030030030020020030

205050207050

300200300150

20015070100

12

TABLE 3--ANALYTICAL RESULTS OF STREAM-SEDIMENT SAMPLES FROM THE COUGAR CANYON AND TUNNEL SPRING WILDERNESS STUDY AREAS, LINCOLN COUNTY, NEVADA, AND WASHINGTON COUNTY, UTAH.--Continued

Sample W-ppms

<20<20

N<20<20<20<20<20<20<20

<20<20

NNN

<20NNNN

NNN

<20NNNNNN

NNNN

Y-ppms

70305020201515303030

50305020302020305030

50302030505030505015

20203020

Zn-ppms

<200 N

<200 N N N N N N N

<200 N

<200 N

200<200<200<200200

N

N N

<200<200<200

NNN

200 <200

<200 N N N

Zr-ppms

1,000200200300500200300300200200

>1,000 500

1,000 200 150 200 200 200 300 300

300 300 500 200

1,000 500 500 300

>1,000 200

300200300100

Au-ppmaa

NNNNNNNNNN

NNNNNNNNNN

NNNNNNNNNN

NNNN

Hg-ppmcvaa

.04

.04

.02

.02

.02<.02<.02<.02.02.02

.02<.02.06.08.06.06.08.04.04.02

.02

.04

.04<.02.02.02.04.16.10.10

.02

.04

.14

.12

As-ppmicp

<5<5<5<5<5<5<5<5<5<5

<5<5<5<5<5<5<5<5<5<5

<5<5<5<5<5<5<5<5<5<5

<5<5169

Bi-ppmicp

<2<2<2<2<2<2<2<2<2<2

<2<2<2<2<2<2<2<2<2<2

<2<2<2<2<2<2<2<2<2<2

<2<2<2<2

Cd-ppmicp

.5

.31.1.3.3.2.2.2.2.2

.7

.3

.8

.7

.6

.7

.9

.5

.7

.3

.2

.3

.4<.1.5.3.5.6.9.7

.8

.7

.4

.5

Sb-ppmicp

<2<2<2<2<2<2<2<2<2<2

<2<2<2<2<2<2<2<2<2<2

<2<2<2<2<2<2<2<2<2<2

<2<2<2<2

Zn-ppmicp

885111041362828382345

140599481675872639566

64516619

1107163779876

74578371

13

TABLE 4--ANALYTICAL RESULTS OF HEAVY-MINERAL-CONCENTRATE SAMPLES FROM THE COUGAR CANYON/TUNNEL SPRING WILDERNESSSTUDY AREA, LINCOLN COUNTY, NEVADA, AND WASHINGTON COUNTY, UTAH.


Sample

1C 001 S1C 002 S:c 003 s1C 004 S:c 005 s:c 006 s:c 007 s:c oos s:c 009 s:c 013 s

:c ou s:C 015 S:c 016 s:c 017 s:c 018 s:c 020 s:c 021 s1C 022 S1C 023 S1C 024 S

:c 025 S1C 026 S:c 027 s:c 028 s1C 029 S:c 030 s:c 031 s:c 032 s:c 034 s:c 035 s

:c 036 s1C 037 S

Latitude

37 31 237 30 3337 30 2137 33 4837 33 4537 33 3637 33 3437 33 2737 33 1537 31 56

37 30 2137 30 2137 29 5737 28 637 28 1337 28 2437 28 5337 29 2137 39 4737 30 49

37 32 1737 32 3337 33 1637 31 637 31 1837 29 3337 28 5237 28 1037 26 5037 26 57

37 30 137 29 0

Longitude

114 0 55114 0 29114 0 58114 3 40114 3 23114 4 9114 4 8114 4 37114 4 56114 3 21

114 3 34114 3 33114 3 10114 1 26114 1 43114 2 33114 3 5114 3 8114 3 16114 3 20

114 5 17114 5 3114 5 10114 1 38114 2 10113 58 30113 59 51113 58 52113 59 5114 0 48

114 2 34114 2 18

Ca-pct.s

3.03.03.02.01.02.03.03.02.01.0

1.52.03.05.02.03.02.03.02.0.5

2.0.7

3.0.5

1.03.02.07.02.03.0

1.52.0

Fe-pct.s

.3

.5

.5

.7

.5

.71.0.5

2.0.5

.31.0.3.5

1.0.5.5.5.5.5

.7

.3

.5

.5

.7

.3

.5

.3

.7

.7

.5

.7

Mg-pct.s

.10

.15

.15

.20

.15

.20

.30

.10

.70

.20

.071.00.20.70.30.50.20.30.15.10

.20

.10

.15

.10

.20

.15

.20

.15

.50

.20

.30

.50

Na-pct.s

1.0.5.5NN

<.5.5.5

1.5.7

1.0.5.5.5.5

1.01.01.0.5

<.5

<.5.7

<.5N.7.7

1.0.5

1.0.5

1.01.0

P-pct.s

3.05.05.0.5.7.7

2.02.0<1.01.0

1.51.03.03.01.52.02.03.03.01.0

1.5<.52.01.51.05.02.07.05.05.0

1.01.5

Ti-pct.s

>2.00>2.002.00

>2.00>2.00>2.00>2.00>2.003.002.00

2.00>2.00>2.001.50.50.15.20

>2.00>2.001.50

>2.002.00

>2.002.001.501.50.50

>2.00.50.50

>2.00.70

Ag-ppms

NNNNNNNNNN

NNNNNNNNNN

NNNNNNNNNN

NN

As-ppmS

NNNNNNNNNN

NNNNNNNNNN

NNNNNNNNNN

NN

Au-ppms

NNNNNNNNNN

NNNNNNNNNN

NNNNNNNNNN

NN

B-ppms

N<20<205015070<202010030

<2020

<20<20<20<20<20<2020

<20

1003020

<2020

<20<20<20<20<20

<20<20

14

TABLE 4--ANALYTICAL RESULTS OF HEAVY-MINERAL-CONCENTRATE SAMPLES FROM THE COUGAR CANYON/TUNNEL SPRING WILDERNESS STUDY AREA, LINCOLN COUNTY, NEVADA, AND WASHINGTON COUNTY, UTAH.--Continued

Samplek

ssssssssss

ssssssssss

ssssssssss

ss

Ba-ppmS

500300500200200500200500500300

700500500

>10,000>10,000>10,000

5,000>10,000

300500

300500500300300500700500

>10,000>10,000

30010,000

Be-ppms

<2223322253

553

<2N

<2<2<2710

3321072

<2<2<2<2

2N

Bi-ppms

NNNNNNNNNN

NNNNNNNNNN

NNNNNNNNNN

NN

Cd-ppms

NNNNNNNNNN

NNNNNNNNNN

NNNNNNNNNN

NN

Co-ppms

NNNNNNNN

<50N

NNN

<20<20

NNNNN

NNNNNNNN

<20N

<20<20

Cr-ppms

2030<20507050

<20N

50<20

N30050

20010050

<2050<20

N

502020NN

20502020

<20

5030

Cu-ppms

NNN

1,500N

<10<10

NN

<10

NNN

<105010

<10<10

NN

NNNNN

<10<10

N10

<10

<10<10

Ga-ppms

15<1010

<10<10<1010

<1030<10

15<10<101015202020

<1015

15201515151530152010

<10<10

Ge-ppms

NNNNNNNNNN

NNNNNNNNNN

NNNNNNNNNN

NN

La-ppms

7001,000700700700

1,0001,5001,0001,000700

300700

1,000500150200100700700150

1,000300

1,500200300700200

1,000300500

300150

Mn-ppms

500700500

1,000300700

1,500700

2,000500

2001,000

7001,000500

1,000500700500500

500200700500500700200

1,000500500

200200

Mo-ppms

NNNNNNNNNN

NNNNNNNNNN

NNNNNNNNNN

NN

Nb-ppms

10070505050701007015050

<50505070

<50NN

10050N

50N

70NN

70<5070N

<50

10070

15

TABLE 4--ANALYTICAL RESULTS OF HEAVY-MINERAL-CONCENTRATE SAMPLES FROM THE COUGAR CANYON/TUNNEL SPRING WILDERNESS STUDY AREA, LINCOLN COUNTY, NEVADA, AND WASHINGTON COUNTY, UTAH. Continued

Sample Ni-ppms

<10<10<10<102010

<10N

<2015

1020103015

<10<10<101020

10<10<1020

<10<10<10<101010

1010

Pb-ppms

<20NNN

2020

<20N

20<20

NNN

1010NN

20NN

20NNNNNNN

5020

<20<20

Pd-ppms

NNNNNNNNNN

NNNNNNNNNN

NNNNNNNNNN

NN

Pt-ppms

NNNNNNNNNN

NNNNNNNNNN

NNNNNNNNNN

NN

Sb-ppms

NNN

300NNNNNN

NNNNNNNNNN

NNNNNNNNNN

NN

Sc-ppms

N2010701007050505

20

105020

<10NNN

<102050

503050705010

<1010

<10<10

1510

Sn-ppms

1505020

2,000100300

1,000300

N300

<202030<20<20

NN

5070N

201,000

10020

300<20

N<20

NN

3020

Sr-ppms

500<200500

<200<200<200<200<200

N<200

300<200200

2,0003,0002,0001,0001,000

NN

NNNNN

5001,500500

1,0001,000

<200500

Th-ppms

N200200

N<200<200

NNN

<200

NNNNNNNN

<200N

<200NN

<200N

200<200200

N<200

<200N

V-ppms

501005010015015015010010070

50100705070202010010050

15050150705070201005030

5050

W-ppms

NNNNNNNNNN

NNNNNNNNNN

NNNNNNNNNN

NN

Y-ppms

5001,000700,000,000,000,000,000500700

500700

1,00020010070100700700

1,000

1,000500700700700300100500150200

500150

Zn-ppms

NNNNNNNNNN

NNNNNNNNNN

NNNNNNNNNN

NN

Zr-ppms

>2,000>2,000>2,000>2,000>2,000>2,000>2,000>2,000>5,000>2,000

>2,000>2,000>2,000>2,000>2,000>2,000>2,000>2,000>2,000>2,000

>2,000>2,000>2,000>2,000>2,000>2,000>2,000>2,000>2,000>2,000

>2,000>2,000

16

TABLE 5--ANALYTICAL RESULTS OF ROCK SAMPLES FROM THE COUGAR CANYON/TUNNEL SPRING WILDERNESS STUDY AREA, LINCOLNCOUNTY, NEVADA, AND WASHINGTON COUNTY, UTAH.


Sample Latitude Longitude Ca-pct. s

Fe-pct. s

Mg-pct. s

Na-pct. s

37 31 237 30 3337 30 2137 33 3637 33 3637 33 1537 32 537 32 1737 32 1737 32 15

37 31 5637 29 5737 29 5737 28 1337 28 2437 28 2437 28 2437 28 5337 30 4937 32 17

37 29 3337 29 3337 29 3337 28 5237 26 5737 26 57

114 0 55114 0 29114 0 58114 4 9114 4 9114 4 56114 4 1114 3 57114 3 57114 3 45

114 3 21114 3 10114 3 10114 1 43114 2 33114 2 33114 2 33114 3 5114 3 20114 5 17

113 58 30113 58 30113 58 30113 59 51114 0 48114 0 48

.30

.30

.20

.30

.05

.05

.70

.70

.70

.20

.70

.20

.50<.05<.051.501.001.00.20.20

1.001.001.00.07.70.15

.5

.51.5.5.5.3

3.02.03.0

.5

3.01.01.52.0

.23.02.02.0

.7

.5

2.0 1.5

.15

.15

.20

.15

.03

.02

.50

.50

.70

.15

.50

.20

.30<.02<.021.501.501.00

.30

.10

1.001.00

.70

.10

.50

.70

1.0.7

3.01.02.01.03.02.02.01.0

2.02.02.0<.2

.22.02.02.02.02.0

1.52.02.0<.22.01.5

P-pCt. S

N N

<.2 N N N .2 .2 .2 N

.2

.2

.2

.2

Ti-pct. s

.030

.030

.150

.050

.050

.020

.700

.500

.500

.020

.700

.100

.200

.200

.150

.500

.200

.300

.100

.020

.300

.500

.500

.015

.200

.200

Ag-ppm s

N N N N N N N N

NNNNN.5NNNN

N N N N

1.0

As-ppm s

N N N N N N N N N N

N N N N N N N N N N

N N N N N N

17

TABLE 5--ANALYTICAL RESULTS OF ROCK SAMPLES FROM THE COUGAR CANYON/TUNNEL SPRING WILDERNESS STUDY AREA, LINCOLNCOUNTY, NEVADA, AND WASHINGTON COUNTY, UTAH.--Continued

Sample Au-ppm B-ppm Ba-ppms s s

N 10 50N <10 30N 15 300N <10 70N 10 20N 10 <20N <10 500N <10 700N <10 700N <10 20

N <10 500N 15 200N 20 300N 15 150N 15 100N 10 700N 10 300N 10 300N 20 150N 10 20

N 10 500N 10 500N <10 500N 15 100N <10 300N <10 500

Be-ppms

2.01.51.02.0

<1 .01.5

<1.0<1.0<1.02.0

<1.0i!o

<1 .0NN

<1 .0<1 .0

N1.02.0

<1.0N

<1.0NN

<1.0

Bi-ppms

NNNNNNNNNN

NNNNNNNNNN

NNNNNN

Cd-ppms

NNNNNNNNNN

NNNNNNNNNN

NNNNNN

Co-ppms

NN

<10NNN

151010

<10

10<1010NN

202020NN

202020N1515

Cr-ppms

NNNNNNNNNN

N<10107050503030NN

202020N

<1015

Cu-ppms

<5<5<5<5NN

<5<5<5N

<55

15305

201530<5N

152020202020

Ga-ppms

20153020201530305020

30303015202030303030

303030N

2030

Ge-ppms

NNNNNNNNNN

NNNN

<10NNNNN

NNNNNN

18


La-ppms

100<50150<50100<50150150150<50

150100100100<50150100100100100

150150150

N100<50

Mn-ppms

200100200100100150150200200100

30015070

<10<10500200200200200

200200200100150200

Mo-ppms

NNNNNNNNNN

NNNNNNNNNN

NNNNNN

Nb-ppmS

<20<2020<2020

<20<20<20<20<20

<20<20<20

NN

<20NN

<2020

<20<20<20

N<20<20

Ni-ppms

<5<5<5<5<5<5<5<5<5<5

<51020<5<5505050<5<5

507050<51520

Pb-ppms

20152020201515202020

15503020152015203030

302015

<102020

Sb-ppms

NNNNNNNNNN

NNNNNNNNNN

NNNNNN

Sc-ppmS

NN

<5<5<5N107

10N

10<57

155

201515<5N

101510N77

Sn~ppms

NNNNNNNNNN

NNNNNNNNNN

NNNNNN

Sr-ppms

100150

<100100

NN

300300500150

300150200700500700500300<100100

700500700

N300200

Th-ppms

NNNNNNNNNN

NNNNNNNNNN

NNNNNN

V-ppms

1010101010

<10303050<10

50303010070150707015

<10

707050

<105070

19


Sample W-ppm s

N N N N N N N N N N

N N N N N N N N N N

N N N N N N

Y-ppm s

30153015151020202020

201010

<10N

20 15 15 15 20

15 20 15 N

15 10

Zn-ppm s

N N N N N N N N N N

N N N N N N N N N N

N N N N N N

Zr-ppm s

7070

20050705010010010070

10070707050100707070100

100100100

N50 100

Au-ppmaa

NNNNNNNNNN

NNNNNNNNNN

NNNNNN

Hg-ppmcvaa

.02NNNNN.12N.04N

N.02.02.10.68NN.04.06.02

.08

.02

.06NN.02

As-ppmicp

107

<55

<5<5<5<5<5<5

<56

<5<5<59

<5<5<5<5

<5<5<5<5<5<5

Bi-ppmicp

<2<2<2<2<2<2<2<2<2<2

<2<2<2<2<2<2<2<2<2<2

<2<2<2<2<2<2

Cd-ppmicp

9

.2<.<.<..4.4.3

<.1

.4<.1.2.2

<.1.3

<.1.3.2.2

.3

.4

.4<.1.4.3

Sb-ppmicp

<2<2<2<2<2<2<2<2<2<2

<2<2<2<2<2<2<2<2<2<2

<2<2<2<2<2<2

Zn-ppmicp

575854302228100766238

9541367

<22328563860

466657103253

20

Table 6. Description of rock samples

SAMPLE DESCRIPTION

CC 001R Welded tuffCC 002 Welded tuffCC 003 Welded tuffCC 006R1 Welded tuffCC 006R2 Welded tuffCC 009 Welded tuffCC 010 Welded tuffCC011R1 Welded tuffCC011R2 Welded tuffCC 012 Welded tuffCC 013 Welded tuffCC 016R1 Welded tuffCC 016R2 Welded tuffCC 018R2 Altered rock, white, limonite on weathered surfaces.CC 020R1 Altered rock, white.CC 020R2 Welded tuff, grayish red.CC 020R3 Welded tuffCC 021 Welded tuffCC 024 Welded tuffCC 025 Welded tuffCC 030R1 Welded tuffCC 030R2 Welded tuffCC 030R3 Welded tuffCC 031 Welded tuffCC 035R1 Welded tuffCC 035R2 Welded tuff

21

analytical results and sample locality map of stream ...united states department of the interior u....

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