BOX 4127, WHITEHORSE,Y .T . YIA 359 667-4415 STANDARD B U I L D I ~ ~ G , VANCOUVER, B.C. 688-2568 -- -- --

1016 STANDARD BUILDING 510 WEST HASTINGS STREET

VANCOUVER, 6. C- V 6 B I L 8

DRILL REPORT

OTIS 11-20 CLAIblS

JANUARY 1 5 , 1980

A.R. Archer , B.A.Sc., P.Eng. C o n s u l t i n g E n g i n e e r

T A B L E O F CONTENTS - - --

P A G E

Proper ty , Location and Access . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Conclusions and Recommendations ........................ 5

ILLUSTRATIONS IN POCKET

Log o f Dri 11 Hole 79-01 , O t i s Claim

Figure WJV 73-0-1 - Geology, O t i s Claims - Scale 1 :1 ,000

INTRODUCTION

During 1979 Wernecke J o i n t Venture (WJV) d r i l l e d 450 f e e t in 1 hole on the

Ot i s property. Work was conducted under t h e d i r ec t ion of geologis t Uwe Schmidt

during the period June 20 t o 25, 1979. Overa1,l supervision was provided by t h e

w r i t e r .

PROPERTY, LOCATION - AND ACCESS

The Ot i s property c o n s i s t s of 10 contiguous Ot i s claims reg i s t e red a t t he

Mayo Mining Recorders Of f i ce r as follows :

Claim NE Grant Numbers Expiry Date

Ot i s 11-20 Y97436-Y97445 17 March, 1980

The claims a r e recorded in the name of Archer, Cathro and Associates Ltd.

on behalf of Wernecke J o i n t Venture (Chevron Canada Ltd . , Aquitaine Company of

Canada Ltd. ) . The property i s loca ted on claim s h e e t 106E/1 a t approximately l a t i t u d e

65O02'N and longitude 134O23'W. Access during 1979 was by he l i cop te r from a

camp on the Igor c la ims, some 1 2 km t o t h e west. Access t o t h e Igor camp was

by he l i cop te r from Kiwi Lake, some 19 km t o the nor th , o r from a bush a i r s t r i p

i n the Bear River v a l l e y , 24 km t o the sou theas t . K i w i Lake 1 i e s 190 km north-

e a s t of Mayo.

GEOLOGY --

The Otis claims were staked over a nor th -s t r ik ing f a u l t which separates

Quartet Group (Unit Hs) s l a t e s t o the e a s t from Fairchi ld Lake Group phy l l i t e s

and c a l c - s i l i c a t e s t o the west, as i l l u s t r a t e d on Figure 0-1 in the pocket. Both

groups exh ib i t weak breccia-re la ted a l t e r a t i o n even though the neares t outcropping

breccia body l i e s 700 m north of t he d r i l l s i t e . Breccias in t h i s d i s t r i c t form in

diatreme-1 i ke pipes and a re an important control f o r uranium mineral iza t ion.

The f a u l t i s a major s t ruc ture t h a t forms a l i n e a r between 30 m and 60 rn wide

and can be traced f o r a length of 6 km. The l i n e a r i s covered by overburden and

rock rubble, except f o r a small exposure some 125 m north of the d r i l l s i t e .

MINERALIZATION

The nor th -s t r ik ing f a u l t on t he Ot i s claims i s weakly mineralized with

branneri te. The best mineralized port ion of the f a u l t i s immediately north of

Ot is Creek, in t he a rea shown on Figure 0-1 i n the pocket, where mineralization

occurs in f l o a t s ca t t e r ed throughout the rubble within the f a u l t l i n e a r over a

horizontal d is tance of 360 m and a ve r t i c a l range of 120 m. The f l o a t i s l a rge ly

composed of c a l c - s i l i c a t e s of the Fairchi ld Lake Group containing sca t te red

branneri t e c ry s t a l s t h a t a r e surrounded by brick red hemati t e a1 t e r a t i on ha1 os u p

t o 10 cm across. The average grade of the radioact ive f l o a t i s estimated t o be

0.2% U 0 and the abundance of f l o a t suggests t h a t no more than 30 cm of the 30 m 3 8

wide l i n e a r i s mineralized.

A 2 m wide port ion of the f a u l t was observed in outcrop a t one l o c a l i t y where

i t i s composed of highly breccia ted c a l c - s i l i c a t e s t i g h t l y cemented with c h l o r i t e ,

quartz and hematite. No anomalous r ad ioac t i v i t y was detected in the outcrop.

DIAP1OND DRILLING

General ----

The klJV d r i l l i n g was contracted from E . Caron Diamond Dr i l l ing L t d . , Whitehorse,

Yukon using a 6BS-1 model d r i l l powered by a 4 cylinder Lycoming d iese l engine

and equipped with hydraulic head and wire1 ine attachments. The hole was d r i l l e d

using BQ rods and b!ater c i r c u l a t i o n and no sludges were col lec ted because core

recovery exceeded 95 per cen t .

Dr i l l ing proved t o be r e l a t i v e l y t rouble f ree . Permafrost was present but did

not require the addit ion of calcium chlor ide t o the water except during radiometric

probing. The core was logged in B r i t i sh ra the r than metric uni ts t o conform with

the lengths of d r i l l rod used. The d r i l l log with assays and radiometric log i s

enclosed i n the pocket and the locat ion of the d r i l l c o l l a r i s shown on Figure 0-1

in the pocket. Dril l core i s s tored a t the H.S. Bostock core l i b r a ry in Whitehorse.

Radiometric Logging

The hole v:as radiometrical l y logged using a Nodel 1000-C Portable Borehole

Logger, manufactured by Mount Sopr is Instrument Company, Delta, Colorado, on loan

from Chevron Canada Ltd. The bTount Sopris logger i s equipped with a 4 . 8 2 cc

thal l ium-act ivated, sodium iodide c ry s t a l housed i n a 3.18 cm diameter probe 1.1 m

long t h a t i s attached t o a 304 m cable. I t records to ta l -count gamma rad ia t ion

i n counts-per-second (cps ) on metric cha r t paper moving a t a speed of 1 cm per

metre of hole probe. Available s c a l e s range from 0-50 cps u p t o 0-50,000 cps.

Most WJV logs itere run a t a 200 cps cha r t width. The hole was probed a t a speed

of approximately 2 m per minute, about twice the recon1,nended speed, because of the

permafrost hazard. Also, the core barrel was removed p r i o r t o probing t o allow

eas ie r ext ract ion of the d r i l l rods in case the hole began t o freeze. The radio-

metric char t i s at tached t o the r i gh t hand margin of the d r i l l log , which has been

given a s ca l e t h a t converts the metric cha r t d i r e c t l y t o hole footage.

Results I

The hole cu t weakly f ractured Quartet Group p h y l l i t e t o 415 f e e t and c h l o r i t i c

c a l c - s i l i c a t e s of t he Fai rchi ld Lake Group from the r e t o i t s f i n a l depth of 450

f ee t . Core recovery was 100 per cent . A two foo t wide zone o f gouge a t 401 f e e t

probably represents the main f a u l t . The p h y l l i t e between the f a u l t and the c h l o r i t i c

c a l c - s i l i c a t e contact i s weakly brecciated and conta ins numerous graphite coated

s l ickensides . No mineralizat ion was present.

Specimens of core were rout inely assayedgeoci~emically a t 50 f t i n t e rva l s and returned

values ranging from 1 .5 pprn U t o 3.0 ppm U and 8 ppm Cu t o 46 ppm Cu in the phy l l i t e .

A s ing le sample from the c h l o r i t i c c a l c - s i l i c a t e returned 12 ppm U and 4 ppm Cu. The

radiometric log ind ica tes uniform backgrounds of 30 cps i n the phy l l i t e and 40 cps

in the c h l o r i t i c c a l c - s i l i c a t e .

The d r i l l hole on

- 5 -

CONCLUSIONS AND RECOMMENDATIONS

the Otis clairns intersected the north s t r iking f au l t about

300 f e e t ver t ical ly below surface. Core recovery was 100% and no evidence of nvinerali -

zation was found in core or w i t h the Mount Sopris gamtra probe. This hole intersected

the f a u l t where i t has Quar te t Group s

Group ca lc - s i l i ca t e s on the footwall.

be t te r mineralized where more cornpeten

No fur ther work i s recommended.

l a t e s on the hanging wall and Fairchi

I t i s possible tha t the f a u l t would

t ca lc - s i l i ca t e s occur on both walls.

Respectfully submitted,

I d Lake

be

WJV 1979 OTIS DIAMOND .- - DRILL - - LOG LEGEND

GEOLOGY

HELIKIAN, POSSIBLY APHEBIAN

Quar te t Group olive green to block ond silvery weofhering, block to grey slote, phyllite ond siltstone, pbly to blocky cleovoge rusty weothering on some fracture plones

block and while inlerlominoted grophilic phillile

olive green to grey weolhering light ond dork grey interlominoted weokly chloritic phyllite, weakly oltered equivalent of HS

Altered Fairchild Lake Group light grey to grey-green, resistonl weathering limy phyllile ond colc-silicole beoring marble, breccioted, hemotired ond minerolized intermittently with bronnerite

SYMBOLS

major geological boundary

minor subdivis ion

STRUCTURE

j o i n t w i t h angle t o core

vein o r mineralized f rac ture w i t h angle t o core axis

f o l i a t i o n t o core axis

bedding t o core axis

f a u l t indicated by gouge

core broken i n t o small fragments

RADIOMETRIC LOG

t o t a l count rad ioac t iv i ty i n counts per second

a t 20 cps/crn s ca l e

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DESCRIPTION

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