TABLE OF CONTENTS
EXAMINATION REPORT
(70% G e o l o g i c a l )
(30% Geochemical)
R I N 88 Cu
Mo P r o s p e c t
11 M i South o f H o t t a h L a k e , L i a r d M. D.
58O 128O SE. (10411)
-
by
A.
Cameron O g i l v y , P.Eng.
for
Conwest E x p l o r a t i o n Co. L t d .
(8.C.)
TABLE OF CONTENTS
PAGE
1.
Introduction
1
2,
Summary and C o n c l u s i o n s
1
3,
L o c a t i o n and A c c e s s i b i l i t y
I
4.
Claims
2
5.
Previous Work
2
6.
Assessment Work
3
7.
Present
8.
R e g i o n a l Geology
5
9.
M i n e r a l Deposit
5
8
10.
4
Exam i na t i o n
Geochemistry
Appendix
Assay C e r t i f i c a t e s
Illustrations
1 Fig.
1
L o c a t i o n Map
la
Fig.
2
C l a i m Map
2a
R e g i o n a l Geochemistry
2b
i n pocket
3
4
6
3
Fig. 4
Fig.
R I N 88 C u
- Mo
Prospect
Fig.
5
S o i l Sampling:
Copper P l o t
bFig.
6
S o i l Sampling:
Moly P l o t
II
I1
II
I1
1.
Introduction
T h i s r e p o r t i s based on a one-day p e r s o n a l examina t i o n o f t h e R I N 88 Cu Mo p r o s p e c t and a c o m p i l a t i o n o f
p r e v i o u s work done by t h e owners,
Conwest E x p l o r a t i o n Co.
Ltd.
2.
Summary -and Conclusions
N e i t h e r grade,
tonnage p o t e n t i a l n o r p e r s i s t a n c e o f
s t r u c t u r e can recommend f u r t h e r work on t h e c h a l c o p y r i t e m o l y b d e n i t e - q u a r t z v e i n s o f R I N 88 M i n e r a l Claim.
However,
t h e d e m o n s t r a t e d e x i s t a n c e o f copper-molybdenum m i n e r a l i z a tion,
and t h e p r e s e n c e of o t h e r unexamined C u
- Mo geochem-
i c a l a n o m a l i e s i n and n e a r t h e R I N g r o u p o f c l a i m s s h o u l d
encourage t h e owners t o do f u r t h e r p r e l i m i n a r y work i n t h e
area.
3.
-
L o c a t i o n and A c c e s s i b i l i t y
R I N 88 Cu- Mo p r o s p e c t i s l o c a t e d i n t h e S t i k i n e
ranges o f t h e C a s s i a r Mountains o f n o r t h e a s t e r n B r i t i s h
Columbia (NTS Map Area 104 I I) a t 58O 09' 30" N,
04' 30" W.and e l e v a t i o n 5700 f t . (approx).
128O
I t l i e s a few
f e e t below t h e r i m o f a s t e e p n o r t h - f a c i n g s l o p e s o u t h
,
..,
. .-
I,.,
c
- 2 -
I
o f a w e s t - f l o w i n g t r i b u t o r y o f Tucho R i v e r , which flows:
. - .
t
-
i n t o Pitrnan R i v e r 12 m i ,
ii r
'
i
.I*-
I
"
qouthwest o f = t h e d e p o s i t , gnd
L
b' d
if,P%rn&
',4 f$>&$&i&k
3
forms p a r t o f t h e S t i k i n e p a t ttEisJt
e r s L'.*"24%$/
hed.
pp&~
4,+:
The n e a r e s t s i z e a b l e l a k e i
. -rpag p n d
t h e n o r t h , and t h e n e a r e s t ' s e t t l e m e n t ,
helicopter
.
? .
base a r e a t Dease Lake, 75=rraF..o~~,,~,,~~?.5,4,W,
.
~-~
lcrr
, t h e p r o s p e c t i s r e a d i l y a c c e s s i b l e by h e l i c o p t e r .
Claims
The p r o p e r t y is h e l d by Conwest E x p l o r a t i o n Co. L t d .
and c o n s i s t s of 90 m i n e r a l c l a i m s ,
Claims
RIN
- 12
13 - 36
37 - 50
Record
-.-
I
Nos.
Staked
Recorded
48447-458
J u l y 29,
1970
26 Aug.
48459-482
J u l y 30,
1970
H
48483-496
J u l y 31,
1970
11
- 60
R I N 61 - 74
48944-953
Aug,
19, 1970
48954-967
Aug.
24,
1970
I1
R I N 75
48968-983
Aug,
25,
1970
I1
R I N 51
5.
recorded i n L i a r d M i n -
8. C. and shown on S t a k i n g Sheet 124 M.
i n g Division,
-
90
70
15 Sept. 70
-
Previous Work
I n J u l y 1970, as p a r t of Conwest's N o r t h e a s t e r n
B r i t i s h Columbia p r o j e c t , P a r t y 3, c o n s i s t i n g o f R.
Rintamaki,
sampler),
( P r o s p e c t o r ) and
J. M e r e l a i d ( s t u d e n t - s i l t
i n t e n s i v e l y p r o s p e c t e d a p p r o x i m a t e l y 20 sq, mi.
i n t h e v i c i n i t y o f a b a t h o l i t h a t 58O 10' N.,
and took ID8 s i l t samples,
S e v e r a l Cu.
,
4 &
___
S i n c e t r e e l i n e i s a t a p p r o x i m a t e l y 5000 f t . elev.,
4.
,
128' 05' W.,
and Mo. anomalies
E..
---*:-
b
i
,
$;'':,,
RIN
RIN <
39
36
42
43
46
47
50
mas
4mm
4w#
4ma
4wse
40493
484Bl
RIN
RIN
37
RIN
41
RIN
44
RIN
45
RIN
48
RIN
49
4wI)
404u
w
4uu)
404m
4.484
RIN
24
RIN
RIN
20
RIN
29
RIN
32
RIN
40
I R:oN I
-1
RIN
RIN
25
*ro
*7l
RIN
R f W ' - RIN
26
2f
23
4mm
,.
4
a
30
~
48465
I
I
31
h
4us5
33
36
4.419
48482
RIN
RIN
35
34
48408
RIN
14
1
RIN
II
1
RIN
I
48447
RI N
2
48488
4usI
40464
RIN
RIN
71
RIN
70
RIN
48964
a963
4Dmo
RIN
72
RIM
69
RIN
68
RIN
RIN
48955
48945
67
48059
RIN
53
a946
RIN
54
74
73
50
55
RI N
48940
4m79
R I 13
56
07
-
48949
4800
* -..
RIN
RIN
59
-
.
48m2
I I
I.
C~NW-ESTEXPLORATION co.
LTD
N.E.B.C. PROJECT -1970
L
&
RIN CLAIM OCIOUP
I
, .
. .
and s e v e r a l Mo.
were o b t a i n e d ,
were found.
and Cu.
- Mo.
showings
D u r i n g t h e p e r i o d J u l y 29 t o Aug.
25, 1970,
90 c l a i m s were staked, as d e t a i l e d above.
6.
I
i
.
-
I
Assessment Work
1
S i n c e Aug.
.
..
25, t h e d a t e o f t h e most r e c e n t s t a k i n g ,
I
t h e f o l l o w i n g program o f work was completed:
(a)
Aug. 27, 28/70 R. R i n t a m a k i and 3, M e r e l a i d ,
p e c t i n g v i c i n i t y o f R I N 88 Cu. Mo. p r o s p e c t .
P r o s p e c t i n g : 4 man-days @ $50,
H e l i c o p t e r : 80 mins @ $135./hr,
(b)
pros-
$ 200.
180.
-
$ 380.
Sept. 3, 4/70 R. R i n t a m a k i and G. Arthur
s u r v e y i n g and s o i l - s a m p l i n g 1500 ft. basel i n e p l u s 16 c r o s s - l i n e s (113 samples).
4 man-days @ $50.
$ 200.
Sampling:
270.
Helicopter:
2 h r s @ $135.
S o i l assays:
T o t a l Cu, Mo:
113 @
.
$3 70
418.10
50.
Plotting results
$ 938.10
(c)
Sept. 10/70 G.
geologist
Id,
( " J e r r y t 1 ) Grant,
0.5 days @ $100.
Helicopter:
40 mins @ $135.
F i x e d w i n g ( e v a m a t i o n i s 50%
of total)
596 @ 653
$
50.
90.
389.40
$ 529.40
(d)
Aug.
(ch.
9/71 E x a m i n a t i o n b y H. Hodges
geol.) and G, W. G r a n t
50% o f 2 man-days Q $100,
H e l i c o o t e r 2:25 h r s . @ $245.
F i x e d wing
$ 100.
592.
370.50
$1062.50
1
f
(e)
-
Aug. 1 1
15 E x a m i n a t i o n by A. C.
O g i l v y , P. Eng. a s s i s t e d by R. R i n t a m a k i
f i e l d time (including t r a v e l 8
a i r c r a f t delay).
4.5 days @
$ 450.
$100.
a s s i s t a n c e 3 days @ $ 3 0 .
"1 f j ' j
Aug. 11 f i x e d wing 50% @ $374.
Aug. 12 H e l i c o p t e r 80 mins @ $245.
327.'
It
110 mins @ $245
449:*'
Aug. 14
.- ~.
~.~
..
Aug. 15 f i x e d wing
r
%
.
-
(f)
Office
$
16 @ $ 3 7 0
Geochem assays:
F i r e assays: 7 @ $10.50
'Report: 2 days @ $100.
Drafting, typing, reproduction
59.2u
73.
200.
100.
'T&
29 "BiD.
Grand T o t a l :
7.
$5276.00
P r e s e n t Examination
I spent 8 h o u r s on Aug.
/-
..j7.Llci
1971 examining a copper-
13,
molybdenum p r o s p e c t on R I N 88 M.C.,
accompanied by M r .
R.
8!i
Rintamaki, t h e C o n w e s t p r o s p e c t o r who d i s c o v e r e d and
staked i t .
I mapped t h e showing ( s e e f i g .
c o n t r o l was by Brunton-and-tape.
4).
Survey-
V e r t i c a l angles were
read, and h o r i z o n t a l and v e r t i c a l d i s t a n c e s computed and
plotted.
',,
I
Under my s u p e r v i s i o n ,
channel samples were taken.
s e v e n I - i n c h by %-inch
These were assayed f o r copper,
molybdenum and goEd by George S p a u l d i n g ' s Whitehorse Assay
i
Office.
The showing was d i l i g e n t l y p r o s p e c t e d f o r poss-
i b l e e x t e n s i o n s a l o n g s t r i k e and f o r p a r a l l e l veins,
negative r e s u l t s .
I
with
I i n s p e c t e d t h e geochemical base l i n e
and s e v e r a l sample l o c a t i o n s ,
and am s a t i s f i e d t h a t t h e
p r e v i o u s work was competently performed.
Sixteen addi-
?-
t i o n a l s o i l samples were taken t o e x t e n d t h e g r i d " s o u t h "
and "west."
Owing t o t h e presence o f b o u l d e r s , few
s a m p l e s p e n e t r a t e d t h e "Bll s o i l h o r i z o n .
Like the
p r e v i o u s s o i l s a m p l e s , t h e s e s a m p l e s were a n a l y s e d f o r
t o t a l c o p p e r a n d molybdenum by B a r r i n g e r a n d Campany.
8.
R e g i o n a l Geology
As shown on GSC Maps 9
29
- 1962 ( " C r y
-
1957 ( " O p e r a t i o n S t i k i n e " )
Lake") a n d F i g . VIII
-
Economic M i n e r a l s o f Canada (GSC,
- 37 i n
-
Geology a n d
19701, t h e p r o s p e c t l i e s
within a northwest-trending batholith of b i o t i t e quartz
m o n z n n i t e , a n d r e l a t e d g r a n i t i c r o c k s , o f e a r l y Creta-
I
c e o u s a g e (139 m. y . ) ,
a n d a s s o c i a t e d w i t h t h e Cassiar
intrusion.
9.
Mineral Deposit
J
Economic m i n e r a l i z a t i o n c o n s i s t s o f c l u s t e r s ( u p t o
f i s t s i z e ) of coarse c r y s t a l s o f m o l y b d e n i t e a n d chalco-
p y r i t e c o n f i n e d t o , a n d e r r a t i c a l l y d i s t r i b u t e d i n , two
p a r a l l e l q u a r t z v e i n s , a n d l o c a l l y , as r e p l a c e m e n k i n a
%-inch a l t e r e d ( s i l i c i f i e d ) wallrock zone.
s u l f i d e s were n o t e d .
No o t h e r
The v e i n s a r e p a r a l l e l , a b o u t 5 f t .
a p a r t , strike n o r t h e r l y a n d d i p 50
-
60° t o t h e west.
S i n c e t h e y o u t c r o p a l o n g a s t e e p (50O) n o r t h - t o n o r t h e a s t - f a c i n g s l o p e , t h e s u r f a c e t r a c e of t h e v e i n s t r e n d s
southeasterly.
( T h i s d i r e c t i o n was c h o s e n by t h e p r o s -
pector i n e s t a b l i s h i n g t h e b a s e l i n e f o r a geochemical
s u r v e y of a f l a t u p l a n d a l o n g t h e a p p a r e n t s t r i k e o f t h e
;r
veins.)
M i n e r a l i z a t i o n i n e a c h o f t h e v e i n s is s t r o n g e s t
i
i n t h e n o r t h w e s t e r l y 20 f t . of l e n g t h o b s e r v e d , a n d sampi
l i n g was r e s t r i c t e d t o t h e s e areas.
Zone 1, t h e u p p e r
zone,
a t t a i n s a maximum t h i c k n e s s o f 2.0
ft.,
b u t 20
c
t o 25 f t . s o u t h e a s t e r l y a l o n g i t s a p p a r e n t s t r ' r k e i t n a r rows t o a few i n c h e s ,
pinching o u t altogether from 45 t o
Zone 2,
60 f t . and a g a i n a t 75 f t .
m a i n t a i n s a w i d t h o f 1.2
t o 2.5
5 f t , below Zone 1,
ft, f o r approximately
50 f t . t o t h e s o u t h e a s t t h e n f e a t h e r s o u t t o s e v e r a l 1t o 3-inch p a r a l l e l v e i n l e t s .
the apparent s t r i k e .
These p i n c h o u t 70 f t . a l o n g
However, one I - f t . d i a m e t e r f r a g m e n t
o f b a r r e n v e i n m a t e r i a l was obseved in t h i s v i c i n i t y .
80th veins are subject t o minor left-hand f a u l t i n g w i t h
h o r i z o n t a l d i s p l a c e m e n t measured i n i n c h e s .
c o u l d bd t r a c e d t o t h e northwest.
n o t 100% h e r e ,
Neither vein
A l t h o u g h exposure i s
t h e absence o f v e i n - m a t e r i a l
i n both f l o a t
and such b e d r o c k as i s a v a i l a b l e suggF,tts t h e v e i n s p i n c h
o u t a b r u p t l y t o t h e northwest.
About 40 f t . s o u t h w e s t o f t h e n o r t h w e s t end o f t h e
exposure, m a l a c h i t e and m i n o r Cu.
Mo. m i n e r a l i z a t i o n
The g r a n i t i c r o c k s e x h i b i t 2 s e t s o f
was n o t e d i n f l o a t .
joints.
-
One p a r a l l e l s t h e q u a r t z v e i n s ,
The o t h c r s t r i k e s
n o r t h w e s t and d i p s v e r t i c a l l y t o s t e e p l y n o r t h e a s t .
west a l o n g s t r i k e ,
strike.
North-
t h e l a t t e r t e n d s t o bend t o a w e s t e r l y
This observation,
t o g e t h e r w i t h a l o c a l anti
abrupt steepening o f t h e upper p l a t e a u s u r f a c e d o w n h i l l
c
,,:I
t o the northwest,
s t r o n g l y suggests a southwest-striking
transverse structure,
such as a f a u l t o r s h e a r tone,
the postulated s t r u c t u r e i s indeed present,
If
the e f f e c t o f
l e f t - h a n d movement on i t , s i m i l a r t o t h a t o b s e r v e d a c r o s s
t h e v e i n s would have t h e effect o f t e a r i n g t h e n e a r b y
n a r t h s t r i k i n g j o i n t s open.
/--
i
T h i s w o u l d e x p l a i n why t h e
v e i n s are b o t h t h i c k e r and richer t o t h e n o r t h w e s t ,
i,e.
t h e "plumbing" i s improved i n t h a t d i r e c t i o n .
It
miyht also explain t h e abrupt termination of the veins
a n d t h e p r e s e n c e of m i n e r a l i z a t i o n i n f l o a t t o t h e
west a s t h e r e s u l t o f l e f t - h a n d
(renewed, post-mineral-
i z a t i o n ? ) f a u l t movement.
Assays a n d s a m p l e l o c a t i o n s a r e d e p i c t e d i n f i g .
4.
The f a l l o w i n g w e i g h t e d a v e r a g e o f assays was o b t a i n e d from
t h e two v e i n s :
cu:
1.42%
MoS2:
0,200
Au :
Tr
T h i s y i e l d s 1.02% Cu.
.
e q u i v a l e n t o r $18.20
g r o s s metal
v a l u c a s s u m i n g Cu. @ $0.50 p e r l b . a n d Mas2 @ $1.00 p e r
lb.
T h e a b o v e v a l u e s r e p r e s e n t a n a v e r a g e w i d t h o f 1.7
f t . a n d a c o m b i n e d s a m p l e d s t r i k e l e n g t h o f 35 f t , (app1'
a r e n t ) o r 29 f t . ( t r u e ) ,
i.e.
130 t a n s p e r v e r t i c a l f o o t .
A dilutian f a c t o r o f s e v e r a l h u n d r e d p e r c e n t would b e
anticipated.
T h e u n s a m p l e d p o r t i o n s of t h e v e i n s w o u l d be of
lower value.
10.
Geochemistry
/-
R e g i o n a l s t r e a m g e o c h e m i s t r y y i e l d e d a sample t a k e n
from a north-flowing
"pup" 2000 f t . n o r t h w e s t o f R I N 88
p r o s p e c t a s s a y i n g 1850 ppm C u and 4.8
ppm Mo ( p a r t i a l ) .
In 1970 a 1500 ft. compass-and-tape
e s t a b l i s h e d and marked b y p i c k e t s .
140° ( t r u e ) ,
b a s e l i n e was
The b a s e l i n e s t r i k e s
113 samples were
r e f e r r e d t o as " g r i d east".
t a k e n a t 50 f t . c e n t e r s o n compass-and-pace
l i n e s 100 ft.
Samples were t a k e n a t d e p t h s o f 6 i n c h e s t o 1 f t .
apart.
from t h e A or t o p o f the B horizon,
f u r t h e r depth penetra-
t i o n p r o v i n g i m p o s s i b l e due t o b o u l d e r s a t s h a l l o w depth.
I n August,
1971,
1 G s a m p l e s were t a k e n on compass
and t a p e l i n e s e x t e n d i n g t h e g r i d 100 f t . g r i d - w e s t ,
and
t h e westernmost 5 l i n e s t o 300 f t . g r i d - s o u t h .
A l l s o i l samples were a n a l y s e d f o r t o t a l c o p p e r and
mo 1y b den urn.
R e s u l t s a r e d e p i c t e d on f i g u c e s 5 and 60
Concen-
t r a t i o n s o f values i n t h e southwest corner o f t h e o r i g i n a l g r i d a r e due t o t h e t r a c e o f t h e v e i n s a p p r o a c h i n g
t r u e s t r i k e on t h e r e l a t i v e l y f l a t upland.
a d d i t i o n a l sampling c o n f i r m this,
y i e l d i n g s t r o n g Cu and
t o (3+005/3+00E),
Mo a n o m a l i e s e x t e n d i n g f r o m (1+OOS/1+OOW)
and open t o t h e s o u t h e a s t .
anomaly,
The s t r o n g d e f i n i t i o n o f t h e
and i t s s p a c i a l r e l a t i o n s h i p t o t o p o g r a p h y
(gentle grid-west
zation,
Results o f the
downslope) and t o t h e o b s e r v e d m i n e r a l i
--
show t h a t t h e anomaly i s i n s i t u .
I f f u r t h e r wor
is done i n t h e v i c i n i t y , e x t e n s i o n o f s o i l - s a m p l i n g t o
t h e south should be considered.
-
-...
cL-qt'L3
2 3 ,
_ I
-
-----
-__._
-~~
lY71
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I.
WORK REPORT NO.
RRINGER RESEARCH
DATE RECEIVED
DATE COMPLETED