CHINOOK CONSTRUCTION & ENGINEERING LTD.

ASSESSMENT REPORT ON THE JAM CLAIM

GREENWOOD MINING DISTRICT, B.C.

lOTH JULY TO 30TH AUGUST 1977

A.M. de Quadros Project Geologist

30 November, 1977

CONTENTS

INTRODUCTION Page 1

Property . .. .. .. .. .. .. .. .- - 0 1

Location and Access . . . . . . . . . . . . . . 1

General Geology . .. .. .. .. . . .. ... 3

WORK DONE

Survey Grid .. .. .. .. .. .. .. .. .. 4

Geochemical Survey . .. .. .. .. .. .. .. 4

Radiometric Survey . .. .. .. .. .. .. .. 5

Geological Survey .. .. .. .. .. .. .. .. 5

Radon Survey . . . . . . . . . . . . . . . . . . 6

DISCUSSION OF RESULTS

Geology .. .. .. .. .. .. .. .. .. .. Geochemistry .. .. .. .. .. .. .. .. .. Radiometry .. .. .. .. .. .. .. .. ..

STATEMENT OF COSTS 0. 0 . 0. 0 . 0. 0 . 0 . 0.

STATEMENT OF QUALIFICATIONS

APPENDIX - RADON SURVEY

ILLUSTRATIONS

FIG* 1: LOCATION MAP - JAN CLAIM . . Page 2

FIG. 2: GEOLOGY - JAN CLAIM In Pocket

FIG. 3: GEOCHEMISTRY - JAN CLAIM .. 0 . 0 . In Pocket

INTRODUCTION

The J a n Claim is p a r t of t h e Granby Proper ty , c o n s i s t i n g of

s e v e r a l c l a ims assembled i n t o one mining p r o p e r t y j o i n t l y by

Chinook Const ruc t ion & Engineering Ltd , , Consol idated Boundary

Explora t ion Ltd. and Cass iar Asbestos Corporat ion Ltd , , f o r t h e

purpose of i n v e s t i g a t i n g t h e uranium showings i n t h e C h r i s t i n a Range

of t h e Monashee Mountains, approximately 12 k i lomet res n o r t h

of Grand Forks, B.C.

During t h e pe r iod of 10th J u l y t o 30th August, 1977, t h e J a n

Claim was i n v e s t i g a t e d by geo log ica l , geochemical and r a d i o m e t r i c

methods a s p a r t of t h e i n v e s t i g a t i o n of t h e Granby Proper ty by

Chinook Const ruc t ion & Engineering Ltd, on beha l f of t h e j o i n t

venture , The fo l lowing is a r e p o r t on t h e work c a r r i e d o u t

on t h e J a n Claim.

Proper ty

The J a n Claim c o n s i s t s of 12 u n i t s bea r ing t h e t a g number

26415 s t aked on 4 t h November 1976. The c la im was recorded on

9 t h November 1977, r e fe rence number 122-4 and claim number 573,

Locat ion and Access

The J a n Claim is loca ted about 12 kms NNE of Grand Forks

between Snowball Creek and Sand Creek i n t h e Greenwood Mining

Divis ion. The l a t i t u d e is approximately 4g0 06N and l o n g i t u d e

is 118O26' W , N.T.S. 82 ~/m Access t o t h e p roper ty is by c.L a d i r t road extending North from Highway 3 a t Grand Forks

(Fig. 1).

t

OBSERVATION

FIG, 1: LOCATION MAP - JAN CLAIM

General Geoloqy

The g e n e r a l geology of t h e Grand Forks a r e a h a s been p resen ted

i n two pub l i ca t ions :

a ) H.W. L i t t l e , 1957: Map 6-1957, K e t t l e River , Eas t Half Geological Survey o f Canada. S c a l e 1 inch t o 4 m i l e s ,

b ) V.A. Pre to , 1970 : S t r u c t u r e and Petrology of t h e Grand Forks Group, B.C. Paper 69-22, Geological Survey o f Canada.

The a r e a is under la in by rocks of t h e Grand Forks Group, a

r a i s e d f a u l t block of high grade metamorphic rocks which are

p a r t of t h e Sushwap Metamorphic Complex. The rocks c o n s i s t

of b i o t i t e , amphibole and pyroxene g n e i s s e s and s c h i s t s wi th

minor q u a r t z i t e s and ca lcareous rocks. A l a ter metamorphic

f o l i a t i o n h a s been imposed on t h e s e rocks. The f o l d axes

0 appear t o be east-west. The whole complex has been i n t r u d e d

by t h e e a r l y b a s i c s i l ls and dykes (now amphibol i tes ) and

la ter a c i d i n t r u s i v e s ranging from q u a r t z - d i o r i t e s t o q u a r t z

monzonite, monzonite and s y e n i t e . Block f a u l t s a r e prominent

throughout t h e s e rocks. The rocks show extreme f o l d i n g i n a

g e n e r a l NE - SW d i r e c t i o n and prominent j o i n t i n g and dyke

emplacement i n a r a t h e r N - S trend.

Maximum minera l i za t ion appears t o be a s s o c i a t e d with pegmat i te

l e n s e s and a l s o i n t h e North-South s h e a r zones; t h e mineral-

i z a t i o n is predominantly u r a n i n i t e , Secondary uranium minera ls

a r e r a r e , b u t have been observed i n t h e showings.

4.

WORK DONE

Survey G r i d

I n t h e i n t e r e s t of conformity wi th t h e g r i d e s t a b l i s h e d by

G.E. White i n 1976, t h e same N-S base l i n e was used. During

t h i s programme, t h e base l i n e was resurveyed by compass and

cha in , c u t o u t , blazed and f lagged. P i c k e t s were p laced

every 50 metres on t h e base l i n e .

East-west l i n e s were turned o f f every 100 metres; t h e s e were

f l agged and s t a t i o n s were e s t a b l i s h e d every 50 metres. I n

t h e i n t e r e s t of accuracy, a c c u r a t e c o n t r o l l i n e s were

e s t a b l i s h e d along 1 0 E and 20E and 15W t o which c r o s s - l i n e s

w e r e t i e d ,

~ e o c h e m i c a l Survey

S o i l samples w e r e obtained a t 50-metre i n t e r v a l s a long t h e

t r a v e r s e l i n e s , c a r e being t a k a t o ensure t h a t a l l came from

t h e 'B1 horizon, Approximately 500 samples w e r e taken.

These w e r e s e n t t o Chemex Labs Ltd, i n North Vancouver f o r

Uranium determinat ion. R e s u l t s a r e on Fig. 3. The a n a l y s i s

was c a r r i e d o u t a s follows:

One-half gram of -80 mesh sample was ashed and then d i g e s t e d twice with 4M HNO3. The r e s i d u e was then d i s s o l v e d i n 25 m i l l i l i t r e s of 4M HNO3 and shaken. A f t e r s e t t l i n g , 0.2 m i l l i l i t r e s of t h e s o l u t i o n w e r e p laced on a platinum d i s h and evaporated t o dryness. A p e l l e t of uranium-fluorescent f l u x was added t o t h e r e s i d u e and t h e mixture fused a t 650°c, The r e s u l t a n t p e l l e t was p laced i n a Tanner I11 Fluorometer and its f luorescence measured t o an accuracy of 0.05 ppm.

Radiometric Survey

The s c i n t i l l o m e t e r survey was c a r r i e d o u t us ing two s c i n t i l l o -

meters, t h e S c i n t r e x GIs-3 gamma r a y spec t rometer , capable o f

g i v i n g s e p a r a t e counts f o r t h e broad band, K-U-Th, U-Th and

Th. The instrument was c a l i b r a t e d a t l e a s t f o u r t i m e s a day

wi th t h e S c i n t r e x s tandard TS-1.

The instrument was used two ways:

a ) Between s t a t i o n s and dur ing open t r a v e r s e s , t h e ins t rument

was c a r r i e d by hand, set on broad band with t h e s h o r t

count ing i n t e r v a l (1 second) ; t h e squea le r being set a t

approximately two t i m e s t h e background. Thus, any

abnormally high count rate could be e a s i l y d e t e c t e d and

a more q u a n t i t a t i v e count c a r r i e d o u t ,

0 b ) A t t h e s t a t i o n s and f o r more q u a n t i t a t i v e measurements,

t h e instrument was p laced on t h e ground. Three measure-

ments w e r e made a t each s t a t i o n f o r t h e K-U-Th, U-Th and

Th us ing t h e long counting i n t e r v a l ( 3 seconds) .

Geoloqic Survey

The geologic survey was c a r r i e d o u t i n conjunct ion wi th t h e

r ad iomet r i c survey, Most o f t h e mapping was c a r r i e d o u t

a long t h e l i n e s , though it was necessary t o zig-zag a c r o s s

t h e l i n e s t o cover a reasonable area. Any h igh count rock

was noted; counts w e r e taken t o o b t a i n a genera l impression

o f t h e source of increased r a d i a t i o n . These rocks w e r e a l s o

examined and samples c o l l e c t e d f o r f u r t h e r work,

Radon Survey

A t e s t radon survey was run over the main geochemical anomaly

i n the Jan Claim. The resu l t s of t h i s work, by Glen E. White,

is attached t o t h i s report (Appendix),

DISCUSSION OF RESULTS

A. Geoloqy ( ~ i g . 2)

The rocks of t h e J a n Claim c o n s i s t mainly o f m e t a p e l l i t e s

of t h e Grand Forks Group. These have s u f f e r e d some a n a t e x i s

and a r e i n genera l migmatites. Numerous i n t r u s i v e v e i n s

of a l a s k i t i c composition occur; t h e s e range i n t e x t u r e

from a p l i t i c t o pegmati t ic . The whole complex appears

t o have been fo lded about ESE and NE t r end ing axes b u t a s

y e t s t r u c t u r a l and s t r a t i g r a p h i c r e l a t i o n s h i p s a r e unknown.

1. Pet ro logy

The rocks of t h e J a n Claim have been d iv ided i n t o f o u r

l i t h o l o g i c u n i t s based on f i e l d examination and

observat ion ,

a ) Mixed S c h i s t s and Gneisses

These rocks occur i n g e n e r a l l y poor ly exposed a r e a s i n

t h e n o r t h and south-eas t of t h e c la im and c o n s i s t o f a

mixture of w e l l - f o l i a t e d b i o t i t e s c h i s t s , cl inopyroxene-

b i o t i t e s c h i s t s and g n e i s s e s and minor q u a r t z i t e .

I n v a r i a b l y t h i s u n i t has been widely i n t r u d e d by con-

cordant quar tz-ve ins and pegmati te , g e n e r a l l y making

up t o 30% of t h e rock. Minor g a r n e t , g r a p h i t e and

s i l l i m a n i t e bear ing s c h i s t s and g n e i s s e s a l s o occur

wi th in t h i s u n i t .

General ly , t h e only s t r u c t u r a l f e a t u r e measurable i n

t h i s u n i t is t h e f o l i a t i o n , which i s p a r a l l e l t o t h e

r e g i o n a l f o l i a t i o n . The r e l a t i o n s h i p of t h i s u n i t t o

o t h e r s is no t known.

b ) Granodior i te Gneiss

The g r a n o d i o r i t e g n e i s s is a w e l l - f o l i a t e d mesocrat ic

rock , apparent ly conformable wi th t h e surrounding meta-

sedimentary rocks. Minor s c h i s t s may occur wi th in

t h i s u n i t . I t is a dark g rey , medium gra ined and

s l i g h t l y porphyr i t i c rock wi th a well-developed

f o l i a t i o n due t o segrega t ion o f b i o t i t e . I t is a

homogeneous u n i t , though wi th minor c l o t s of mafic

minerals .

I n hand specimen, o r t h o c l a s e , q u a r t z , b i o t i t e and horn-

b lende a r e e a s i l y i d e n t i f i e d . Accessory minera ls

p r e s e n t a r e magnetite, a p a t i t e and ga rne t . The u n i t

appears t o be of magmatic o r i g i n , t h e f o l i a t i o n being

imposed by l a t e r deformation and r e c r y s t a l l i z a t i o n .

Numerous concordant a p l i t e s and pegmat i tes are

observed.

c ) Amphibolite Gneisses

Dark coa r se grained w e l l - f o l i a t e d hornblende-plagioclase

rocks commonly occur i n l a y e r s and l e n s e s from 50

cen t ime t res t o 6 metres across . These l a y e r s a r e

g e n e r a l l y concordant and may b e i n p a r t metasedimentary

and i n p a r t igneous.

d ) G r a n i t i c Rocks

Layers, l e n s e s and knots of l e u c o g r a n i t e , a p l i t e s and

pegmati tes are common throughout t h e metasedimentary

sequence.

These rocks a r e seen t o c o n t a i n potash f e l d s p a r ,

o l i g o c l a s e and quar t z wi th minor b i o t i t e , muscovite

and almandine. Compositionally, they range from

quartz-monzonite t o g r anod io r i t e s and t e x t u r a l l y

from a p l i t i c t o pegmatit ic. Small l e n s e s of var ious

s c h i s t s and gneisses occur wi th in t h i s u n i t , bu t

seldom more than four t o f i v e metres across.

This u n i t grades i n t o t h e o t h e r s with an i nc r ea se i n

t h e amount of s c h i s t s and gne i s ses ; boundaries a r e

t h e r e f o r e sub jec t ive and complicated by t h e f a c t t h a t

t h e g r a n i t e s do outcrop b e t t e r .

2. Contact Rela t ions

The r a p i d l y a l t e r n a t i n g charac te r of most J an rocks

sugges ts t h a t t h e whole complex is a migmatite, due i n

p a r t t o anatexis and i n p a r t t o i n t r u s i o n of con-

cordant dykes. The r e l a t i o n s h i p s between var ious

u n i t s a r e complex, and a proper understanding of t he se

r e l a t i o n s h i p s has not y e t been a r r i v e d a t . Apart

from t h e f o l i a t i o n , p e t r o f a b r i c elements a r e poorly

developed and seldom v i s i b l e i n outcrop.

The most cons i s ten t s t r u c t u r a l element i s t h e composi-

t i o n a l layering. This f e a t u r e can be observed i n most

outcrop and suggest a monocline, with a s t r i k e ranging

from NNW t o W E , and dipping 30° t o 50° t o t h e west.

The exact na tu re of t h i s compositional banding is no t

understood, but appears t o be p a r t l y due t o deforma-

t i o n and p a r t l y t o anatexis . I n t r u s i v e s a r e gene ra l l y

p a r a l l e l t o t h i s f o l i a t i o n and t hus r e i n f o r c e it.

The second most common f e a t u r e is a s t rong N-S sub-

v e r t i c a l jo in t ing which c o n t r o l s t h e outcrop p a t t e r n

and topography. This j o i n t i n g appears t o have

c o n t r o l l e d t h e i n t r u s i o n of t h e a p l i t e s and t h e t h i n

veneers of ep ido te and c h l o r i t e i n f r a c t u r e s i n t h e

g r a n i t i c rocks.

Other s t r u c t u r a l elements have been observed, b u t t h e s e

a r e developed f a i n t l y and t o o r a r e l y f o r any s t a t i s t i c a l

genera l i za t ion . Some minor E-W l i n e a t i o n s have been

observed; t h e s e may be r e l a t e d t o t h e E-W f o l d axes

descr ibed by Preto and o the r s .

0 B. Geochemistry

S t a t i s t i c a l Analysis

A t o t a l of 5074 geochemical ana lyses w e r e a v a i l a b l e from

t h e Granby Property and t h e s e have been used t o i n t e r p r e t

t h e J a n geochemistry. These ana lyses show a log-normal

d i s t r i b u t i o n , though with a p o s s i b l e second popula t ion

above th resho ld values. The fo l lowing a r e t h e va lues

determined:

mode 0.5 ppm

mean (2) 1.3 ppm

s tandard dev ia t ion (s + - 4.9 pprn

th resho ld (2 + s) 6.2 ppm

low anomaly (2 + 2 s ) 11.0 ppm

high anomaly (x + 3s ) 16.0 ppm

The anomalous va lues a r e d i s t r i b u t e d a s follows:

Above threshold ( x + s) 5.26%

Above low anomaly ( 2 + 2s ) 3.04%

Above high anomaly (x + 3s 2.70%

These va lues a r e higher than p r e d i c t e d by t h e methematical

model, sugges t ing a second populat ion. The anomalous

a r e a s def ined appear n e i t h e r o v e r l y r e s t r i c t e d nor o v e r l y

l a rge .

Geochemical Analysis

The geochemical r e s u l t s have been p l o t t e d on Fig. 3 and

a r e contoured on t h e b a s i s o f t h e s t a t i s t i c a l analyses .

They show s e v e r a l anomalous a r e a s , g e n e r a l l y l i n e a r and

t r e n d i n g e i t h e r NE o r EW, t h e most i n t e r e s t i n g be ing

t h e anomalies i n t h e wes t -cen t ra l and e a s t - c e n t r a l p a r t

o f t h e claim. Minor amounts o f a u t u n i t e have been

observed i n fractures i n rocks near the west-central

anomaly, though the radiometric readings are low, The

east-central anomaly occurs mainly i n overburden; follow-

up work with a radon emanometer is attached t o t h i s report

(Appendix). Further fol low up is planned on both these

anomalies,

C . Radiometry

Separate counts were taken o f every s t a t i o n f o r Total

Count, K-U-Th, U-Th and Th. The background values were:

Total Count 350-500 counts ( f o r 3 seconds)

K-U-Th 7- 12 counts ( " " 1 U-Th 4- 12 counts ( " " 1 Th 0- 4 counts ( I' 1

No s i g n i f i c a n t l y larger values were obtained during t h e

survey and hence these have not been p lo t ted .

SUMMARY

This investigation of Jan Claim has pinpointed two possible

areas of mineralisation. Detailed examination of the

anomalous areas is planned in order to assess the significance

of the two geochemical anomalies.

Project Geologist

STATEMENT OF COSTS

Period J u l y 10 th - August 30th 1977

Costs ass igned t o Jan Claim:

a ) Wages

A.M. d e Quadros, P r o j e c t Geologis t 15 days @ $90.00 $1,350.00

5 A s s i s t a n t s 25 man-days @ $60.00 $1,500.00

T o t a l Wages $2,850.00

b) Room and Board (Motel)

40 man-days @ $32.00 1,280.00

0 c) Transpor ta t ion

2 4x4 t r u c k s @ $500.00/month

d ) Gamma-ray Spectrometers

Renta l of 2 u n i t s

e ) Geochemical Assays

500 @ $3.25

f ) Expendables ( f l agg ing , thread , e t c . )

g ) Report P repara t ion

T o t a l Cos ts $6,855.00

p r o j e c t Geologis t

16.

STATEMENT OF QUALIFICATIONS

I, Antonio M. de Quadros, certify that:

a) I hold the following degrees in Geology:

B.Sc. Hons. University of London 1964

M.S. U.C.L.A. 1968

Ph.D. University of Nairobi 1972

b) I have worked on geological projects since 1959,

including:

i 1964-1965: Geologist, Geological Survey of Tanzania

ii 1968-1972: Lecturer in Geology, University of Nairobi, Kenya

iii 1973 : Geologist, Agilis Exploration Services, Vancouver, B.C.

iv 1974 : Geologist, Union Carbide Exploration, Vancouver, B.C .

v 1974-1975: Geologist, Dolmage Campbell & Associates, Diamond Drilling of Hat Creek Coal Deposit.

vi 1975-1976: Geologist, Kerr Addison Mines, Feasibility & Exploration, Grum Joint Venture

vii 1976-1977: Geologist, Dolmage Campbell & Associates, Interpretation, Hat Creek Coal Deposit

c) I am a pupil member of the Association of Professional

Engineers of British Columbia. .

Project Geologist

APPENDIX

RADON SURVEY

% 8 M e GEOPHYSICAL C O N S U L T I N G i% S E R V I C E S L T D .

9251 Beckwith Road, Richmond, British Columbia, V6X 1V7 Telephone : (604) 2 7 3 - 6 9 6 2

August 25, 1977

Mr. I.. Schorn Minerals Manager Chinook Construction 3rd P1. 1201 W. Pender St. Vancouver, B. C.

Dear Mr. Schorn:

Pursuant to your request, we have tested a radon gas detector unit over anomalous geochemical values as directed by your field geologist.

Enclosed is a sketch survey map over an area where a number of lines were tested. The radon gas values show a

0 well defined trend and reached a value of 116 c.p.rn. Several geochemical values in swampy areas did not give radon gas readings which may indicate a rn&hod of evaluating the geochemical anomalies.

Thus, it would appear that the radon gas method may be of valuable assistance in this area.

Y~urs truly,,

- Consulting ~eophysicist

R A D O N G A S ( C P M )

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CHI NOOK CONSTRUCTION A 8 8 ENGINEERING LTD. I

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WENDY C L A I M S - L A S T 1 a 2 GREENWOOD M I N I N G D I V I S I O N - BRIT ISH COLUMBIA

G E O P H Y S I C A L C O N S U L T I N G & S E R V I C E S LTD.

925 Beckwith Road, Richmond, British Columbia, V 6 X 1V7 Telephone : (604) 2 7 3 - 6 9 6 2

October 25, 1977

D i s cuss ion :

T h i s i s an example o f an enhanced r e d u c t ion and i n t e r - p r e t a t ion t echn ique f o r t h e radon gas d e t e c t o r . The t e 7- n i q u e i s a p p l i e d here t o d a t a f r om t h e survey performea on t h e Wendy Cla ims, Grand Fo rks area, i n J u l y 1977 f o r Chinook C o n s t r u c t ion .

T h i s method a l l o w s t h e d e t e r m i n a t i o n o f t h e r e l a t i v e c o n t r i b u t i o n o f radon and t h o r o n gas a t each s t a t i o n by t h e c p p l [ c a t i o n o f a f o rmu la based on a knowledge o f t h e h a l f - I i v e s o f t hese t wo gases.* T h i s p r o v i d e s a way o f separ- a t i n g anomal ies caused by radon gas (Rn 2 2 2 ) a daughter p roduc t o f t h e uranium (U 2 3 8 ) decay s e r i e s , f rom those caused p redominan t l y by t h o r o n gas (Rn 220) , a daughter pro- d u c t o f t h e t h o r i u m ( T h 2 3 2 ) decay s e r i e s . T h i s i s ob- v i o u s l y o f v a l u e i n p i c k i n g t h e most f a v o u r a b l e t a r g e t s . I n t h e example, f i g u r e 1&2, radon gas p l a y s t h e major r o l e , i nd ; ca t ing t ha t t h e source i s pr ;mar i I y u ran ium.

0 I n a d d i t i o n t o t h i s t h e r a t i o o f radon t o t h o r o n gas p roves to' d iagnost i c i n t h e sepa ra t i o n o f anomal i e s due t o unusual l y permeable s o i l s . H i g h so i l permeabi l i t y produces an inc rease i n count r a t e but i s u s u a l l y w i t h o u t an a t t end - a n t inc rease i n radon- thoron r a t i o . T h i s i s due t o t h e f a c t t h a t t h e permeabi l i t y a f f e c t s bo th gases v e r y n e a r l y e q u a l l y . I n f u g u r e 3&4 a l l t o t a l count anomal ies a r e

. para1 l e l e d by inc reases i n radon- thoron r a t i o w i t h t h e p o s s i b l e excep t i on o f t h e a r e a near 13E on l i n e where t h e t o t a l count r a t e may be somewhat enhanced by increased s o i l permeabi l i t y .

Thus t h e a rea o f major i n t e r e s t i n t h i s d a t a would be t he SW-NE t r e n d show dashed on f i g u r e 4 .

* ( R . H. Morse; ?Radon Counte rs i n Uranium E x p l o r a t i on ?,

March 1976)

C o n P P V m 1 - n ~ t c due to T j l o v o r G a s ( R k 220)