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•HK89NE9475 DEROCHE 8028 DEROCHE

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GEOLOGICAL REPORT

on the

EDGAR GROUP.

USKOCHK TOWNSHIP.

SAULT STE. I'lARIK DISTHICT.

REDIDENi t;.::! LOG l ST SAULT STE. MARIE

RECEIVED FROM ALGOMA CENTRAL RAILWAY

NOT TO DC KCMOVED r.^'J.V.

THE OFFICE OF THE RESIDC.iT

GEOLOGIST, ONT. DBPT. OF MINES

SAULT. STE. M ARIE, ONT.-

INTRODUCTION ..........y..;.,...*................... l

LOCATION ..............;:.........,................. l- - - - , - ^ *

MEANS OK ACCESS ,......,. ......'....,... .,. .......... l

OWNERSHIP.......................................... l

TOPOQRAPHT ......................................... 2

WORK CARRIKD OUT .........,.......................,. 2

OTHER SOURCES UF INFWUTION .,..............,....... 2

GENERAL GEOLOGY ......................... ........... 2

Introduction ................................... 2Table of Formations ......,.,.................... 3Huronian ...................................... 3

Quartcites .................................. 3Keweenawan --..............,... *.,.............. 4

Quart z-Diaba se .............................. ^Younger Diabase.............................. J*basic Dyka ................ .................. 5

Pleistocene ...................... ............. 6

STRUCTURAL GEOLOGY.................................. 6

Folding ...... .. ... ...... ... .... ............... 6

Faulting .......... ...... .. ... ...... ..... ...... 6

ECONOMIC GEOLOGY..................... . ..... ......... 6

APPENDIX ........ .................. ............ .... 8

Surveying .......... .. ... .. ..... .. .... ......... c)Geological Mapping ..... ...... ............ ..... rfSummary of V/ork Performed...................... B

Summary of /iari Days ........................... 8

Names and Address of Personnel ................ 9

MAPS

Loc tion Map Geological Map

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1 ^ ; *

Th* folltyiaf i* a r*p*rt on tho result* of the c*ol- l atappinx or a f ire elaia crovp^ kftova at the Idgar

Group* .-- ' ' -- . .-. : ' '' 'A-' ',"' - - ' '

The kappinf aad dttailtd proapectiaf of thii croup vaa carried out for tiro reaaoaai

(1) To. determine if t he ae elaina had any value frta'a rnininf standpoint.

(2) To perfom one years* assessaent wo*k, as required by the option under vhitih t* croup is held by Teck Exploration Company Liaited.

LOCATION!

The los&en and numbers of the 5 dains is as follows t

5100 - S.E. i o f the N | Lot 9, Cone.11, Deroche Tvp

5101 - H.W. \ of the S l Lot 9, Cone.11, Deroche Tvp

5102 - K.E. \ o f the S i lot 9, Cone.11, Deroche Tvp

5103 - 3.W. ^ of the S 4 Lot 9, Cone.11, Deroche Tvp

5104 - S.E. i of the S i Lot 9, Coac.ll, Deroche Tvp

MEANS OF ACCESS!

These claims are rery accessible, since the main line of the JLcoma Central Railvay crosses the group, mileace 22 btinc located ob Claim 5101. In addition, the property is also crossed by the main hlghvay from Prorincial Highvay No.17 to Searchmount and Ranger Lake. The distance from Sault Ste.Marie to the claims by road it approximately 22 miles. The highway and railroad are shovn on the accompanying map.

OWNERSHIP!

These claims vere staked on Deceiber 2nd, 1951, and recorded OD December 31st, 195 by Gordon M.Edgar, IS- Cathcart Street, Sault Ste.Marie, Ontario.

The goological mapping vas carried out and this report prepared by Teck Exploration Company Limited, Room 102, 200 Day Street, Toronto, Ont., vbo hold an option on the property under an agreement dateli January 23rd, 1952.

'^.. V-'-'*-. ./'' '" "*

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,; Tht township of Dtroche in which these claims art located, is owntd by the Algoma Central Railway Company, and the claims art held under lease from the A.C.R.

TOPOGRAPHYl

In general the claim group it low along the north and west sides, with tht altitudt increasing to tht south east, where hills and ridges are present* The lowest elevation, on claim 5100, is about 925 feet above tea level, which increases to around 1500 feet in the south-outt corner of claim 5104.

WORK CARRIED OUT i (Full detailt given in Appendix)

In preparation for the geological napping north-south traverses lines were estiblished at 400 foot intervals, by transit. This work was done by V.M.MacDonald, 3rd, year Mining Engineering Student, University of Toronto, assisted by W.James, chainman and line-cutting.

The geological napping vas carried dout by R.I. Mudford, Geologist who also compiled the geological map and assisted in the writing of this report.

The calculations for the survey work and toe plotting of this was carried out by V.MM. MacDonald.

The final map was drawn by A.J.Yalker, Draftsman.

This report was written by J.R.Bridger, Chief Geologist, and R.K. Mudford, Geologist.

OTHER SOURCES OF INFORMATION:

(1) Volume 35, Part 2, 1926, Ontario Department of Mines, pages 1-52 - Sault Ste.Marie Area, by R.G.Mcconnell.

(2) Petrographic Studies of thin sections prepared from rocks occurring on a neighbouring claim group. (McNabb Group). This work vas done for Teck Exploration Company Limited by Dr.Peter Peach of the Department of Geology, University of Toronto.

GENERAL GEOLOGY t

Introduction!

Only three types of rock are exposed on this group, all of Precambrian age. Most of the area is underlain by

3.

{huronian quartsite, classed aa Upper Cobalt Series by Mcconnell.This haa been intruded by a vide dike or aill of Xeweenawan^ttarta-diabaae, atrikinf eaat-veat. The third rockpresent is a northwest striking dike of younger diabase, whichintrudes both the older rocka* The north-cast claim, Mo.5100,ia entirely covered by a heary mantle of overburden withthe exception of one outcrop near the aouth boundary.

TABLE OF FORMATIONS

QUATERNARYt

Pleistocene - Clsys, Sands j Tills, Gravels and Boulders.

PRECAMBRIANt

- Younger diabase dike.

Keweenawan -

- Quarts diabase.

Huronian - Upper Cobalt - Quartcites.

Huronoan;

Quartiitesi

The oldest rocks of the area consist of quartzite*, which have been placed in the upper Cobalt Series of the Huronian by Mcconnell. These rocks underlie the greater part of the five claim group with which this report is concerned. They form the north part of Bellevue Ridge, about which Mcconnell saya, (op.cit.F.28), "In the central part of the ridge they have been pressed into a sharp unsymmetrical syncline, the southern limb dipping to the south at angles of SO0 and over. Towardthe north end of the ridge the syncline is probably overturnd slightly to the south, as the beds have a uniform steep northerly dip".

A study of this quartzite in the field indicates that it is for the moat part a hard glassy, completely cemented rock, usually pale pink or light yellowish gray. Occasionally there are dark grey or red coloured phases. Pebbles of red and green jasper and white quartzite, never more than a few inches long, are found in the fuartsite. These may be scattered sparingly throughout the quartzite or occur in narrow lenses or bands.

Keweenawan; ^.;

Quartt Diabase: - ^

The Huronian quartz!tea have been intruded by a wide dike of,quartz-diabase, which strikes across the centre of the four southern claims, in an east-west direction. Thi* has been described by Mcconnell, who considers it to be of Keweenawan age, (Op.cit.p.36-37). He notes that it is typical quartz-diabase, which in some places contains scattered red plagioclase crystals, and that hornblende probably derived from augite is also present* .

w

On the Edgar group the quartz-diabase could not be found in contact with the quartBitem so it was not possible to ascertain its dip, but aincethere is little or no notice able change in strike with change in elevation, it is assumed that its attitude is nearly vertical.

In hand specimenn the quartz-diabase consists mostly of feldspar and pyroxene. 'he texture is granualar and except near the chilled edge is medium to coarse erained.

On the north side of t he dike the plagioclase feldspar ^ives the rock a greyish green colour. Toward the south side of the dike the plagioclase has the peculiar red colour noted above, giving the rock a pink colour. No quartz can be seen in hand specimens but it probably occurs as iotergrowths with the feldspars.

At never:.! points along th*: fine grained north contact chlorite schist was observed. In the south contact considered red iron oxide occurs, and nearby quartzite has bf*en altered to a dark red colour,

'.'pinger Diabase

St.rikinc N 50OW, through daims 510/*, 5102, and 5101, is a narrow diabase dike about ten to fifteen feet wide. This dike dips 75 to 80 to the east. Since it definitely intrudes the quartz-diabase, it has been claused as "Younger Diabase". It is similar to the lato Keweenawan dikes of the area, commonly known at; olivin* -diabase ainco they are usually characterized by the presence of olivine. This dike has weathered more readily tha the surrounding quartz- diabase and only a few small outcrops can bo found, but its course is rru-.rked for so^ie distance by a. shallow depression.

The younger diabase dike, as see;, in hand specimens, is a very dark coloured rock, made up mostly of plagioclase feldspar and pyroxene alonjt with a little magnetite. It is an extremely fresh rock. Away from tne chilled contact it is joedium grained with well defined diabasec texture.

A thin section was prepared fro.i a sample of drill core taken from thi* dike, or a siiailar one, some 4000 feet north of its location on the Edgar group. The petrographic report, prepared by Dr. P.A.Peach of the Department of Geolo- logical Sciences, University of Toronto, is as follows:

MINERALS Approx percentage.

Basic Andesine (Ab 55) Piganoite (a pyroxene) Magnetite 5^ Hornblende (Altor of pyroxene) Small patches Pyrite Few grains Apatite Few needles Quarts Very few grains.

The diabasic textu e is prominent; the rock is extremely fresh, the pyroxene showing only slight alteration to :iornblende.

Basic Dike;

A short distance north-we? r of the centre of claim 510/*, along the north aide of the ream is a shallow trough-like depression, three or four feet, wide, striking north-east. In the south end ci" t hr depression, nearest the stream, is a small badly weathered outcrop. The material in the outcrop is dark red, very soft arid rather micaceous. It is probable that this material is the weathered top of a lamprophyre dike.

A thin section, prepared f r: c; a sarcplt- from a similar occurrence, some? 5000 feet to the north was reported on as follows:

HINEkALS Pe re unt a/Lb (A p prox ) .

brown Biotite {lint; grained) /,OJoSericite (alt. of Feldspars) 3O,*Magnetite 25,'Chlorite Ft.-w scattered ;vtchfcs.Clinozoisit e. Fuw fuathcry grainsPyrite "^iysosiinated grainsCarbonate Irregular patcheo.

The rock consists of completely soricitizod feldspars, (somewhat porphyritic) in a r; eve: grained matrix of biotite flakes and fine grained :-iap,r'.etitn. It, i:- clanned as an altered lamprophyre.

6.

There la not enough evidence, to definitely determine the age of the dike, but it ia younger fen the Huronian, ince it cutt the quartzite. . ,

It is probable that it is of Keweenawan age but since it has never been found in contact with the diabase, its relation to this rock is unknown.

Pleistocene:,

The deposits of the pleistocene consists of unconsolidated material of glacial origin* This consists of clay and sandy till on the higher slopes, with sand, gavel, and boulders, probably outwash material in the valleys.

Striated rock surfaces observed at several points show the last movement of thfc last ice sheet to h&ve been S 370 W.

STRUCTURAL GEOLOGY:

Folding.

As mentioned previously, Mcconnell described the quartzites of this area as bein/; part of the north limb of an overturned syncline, since the beds have a steep northerly dip. l*o new evidence has been found that disagrees with this. li is possible that 1-he east-west quarto-diabase dike has been intruded alonj; the axis of this syncline.

Faulting:

On the accompanying l.)0 scale f,eolo^ical plan, it will be noted th;it t, he wide quartz-diab.-iFe diku ends abruptly alonfr the east side of a volley, striking alif^htly west of south across claims 5101 and 51 3. Othor outcrops of quartz- diabase occur on the wont side of this valley, four or five hundred feet trthe south. It is probable that a fault is located in the valley which ha? dis: laced the diabane to the .south on the west fide.

Two other valleys are s how r irurk the course of faults or basic of such structures car, o t? 1'ound 01,

ECONOMIC OLOUMY;

'tie plan, s, but no

. on riik' surface-.

which ruay cviue::ce

The only mineralization observed on tha group was a few narrow white quartz stringers. ''bout the centre of ^laim 510i* P- quartzite outcrop has scattered quartz etringera,

.^^molait&ijr le fi a than one half inch wide,. Again in the quart sit* jvT*. ;.\ :t*tfbbr6j*v immediately horith of the railway/track on/ claim '' * 5100, *therje are a few s t ringer B of quarts, the largest

:t--:.!'.'i' ' being about^three inches wide, . - . ,

^\ "'y v ih,;, Hany/'Of tho ore deposits of the surrounding area \ r are awAociatfld with diabase dikes, therefore a likely place

:' for ji3Ln0ral depooition-is along a fault or shear, in or."^' . ciieiir-: a^ diabase dike. The only favourable area on this group

^ * - Vould appear to be where the possible fault intersects the*:;V . younger diabase dike, as well as the quartz diabase dike.

? v " : . ' x -. - R.K.rfudford.B.A. j - . Geologist.

'. ~ . \

J.R.Bridger. M.Sc.P.fiug Chief Otologist.

July 2/rd, 19i*2. JRB7HSB

V,. ' : ~ : . . ., :- . ' v ;"-;-.' - ";-' t'-'\-./ - ' - 8-

r. APPENDIX (Edgar Group)., -. . ,. , - ' ' -.- ..-. : -* ' - :' -OP HW GEOLOGICAL MAPPIMO *WAS CAllRlBD OUT.

^nvv ' :*lv'; A0 ..the Algoma Central ..Railway. crosses the' approximate r ;V .'.'',.'^centre 4t the 5 claim group, a transit aurvey was run along ;-,'^r t ha railroad right-of-way, and stations established at ^:t ^ approximately every 200 feet;" These stations numbered from

v OS-166 to 8*18.0, inclusively, are shown on.the geological '-,'V^-" plan.^ This purvey was'tied into the lot post, 65 feet '- " "j'v ^north of the railroad, on the east boundary of the c la in group.- ,* ^ Thill post is marked Lot 6, Lot 9, Concession 11.

2. From the base line established by these stations, north--y"i south, traverse lines were turned off by transit, at 400 foot v1'-.'-'* "'/intervals, (400 feet apart}, These lines were then extended

; ." to the north and south boundaries of the claim group with the-' transit. - Pickets were established every 100 feet by steel

tape and 4 transit.

' * QEOLOGIJA1. MAPPING:

: Since the vein structures in the area strike more 1 - nearly north-south than east-west, all traverses for mapping

were run east-west between the north-south survey lines. The outcrops were tied ir. by pace and compass, the distance from a surveyed line never being more than 2uO feet. The traverse lines were run at 100 foot intervals in most caycs, but where greater detail was re quired this was reduced to 50 feet. '

SUKttAHY OF rtQRK PEKKORMhl;

Permanent survey stations established (base line) .... 16Seni-pernnnent, stations (pickets) established ........ 249

Lines tiurveyed - oat;e lineo ~ Length (approx) ........-;,800 feetLines surveyed - Traversw lines - Length(anprox)......24,700 feet

Line cutting (traverse lines) - Length (a:pro.\) ......24,7^0 feet(J+ .68 niles

SUI-84AKY Q!' MAN DAYS:

r;udfordMcDonaldJamesWalkerBridge r

WAl'i'lNU OhhiUh .-fOKK J'rtiiF DKAFl'lNG uKPOiCI

811

4

13

CUTTING

6 156 15

TUT A L

10

2521

1

3

12 30 60

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^V^fcte-lfrib ADDRESSB3 0*^PKRSONNE

1st May 1952*M:^:. -V s o/ia, TocK Exploration Co .ltd i. ; - to ' ' ^-Va Room :102, '200 Bay St., ToroiitOsOnt. " 15tb June 1952' '' ~ ' ' ' "

, Student Engineer*. 1st May 1952402 Victoria Park Ave., to

vToronto,pnt.. 15th June 1952~ ' ' '

. . .. :Chainraan-Linocutt'er. , 1st May 1952

c/o^ Teck Exploration Co. Ltd. . 'toRoom 102, 200 Bay St, Toronto. Ont. 15th June 1952

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.A. J. Walker. Prafteman . 9th July 1952. c/o Teck Exploration Co. Ltd. ,R6om 102; 200 Bay St., Toronto. Ont,

J.R.bridger. Chief Goologist. 16th, 17th *o 18th c/o Teck Exploration Co. Ltd. July, 1952. Room 102, 200 Bay St. Toronto. Ont. :

A total of 60 faan days has been npent on this , roup, or at the rate of U days work in respect of each man necessarily employed 240 days wcrk. Therefore applic t ion is being made to record 200 days work, or 40 days for each claim in the five (5) claim

4IK09NE9475 DEROCHE 0880 DEROCHE300

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(5)fi

OffAWfJEL IN THE

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N --.r-o^^:: '

A.C.R F ILE Rep. 1 ,0

Copie d Apr i l A/ H.O, L.

June/t l J.D.S.

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LEGEND SYMEOLSLAMPROPHYRE

WJNGER DIABASE

QUARTZ DIABASE

QUARTZITE

BASEMENT SERIES

STRIKE ft Di P PROBABLE FAULT

STREAM

OUTCROP

ASSUMED CONTACT

TECK EXPLORATION/ CO LTD.

M e WABB GROUP-EDGA/? OPTION

2HE TOWNSHIP

GEOLOGICAL PLANSURFACE

ON CLAIMS 5100 fo 5104-

SCALE 1^200 DATE

41K09NE9475 DEROCHE 8020 DEROCHE 200

EPLRTTC O. LTP