104P4 Be1

PRODUCT
PRODUIT
PROVINCE OR
TE R R lTORY
BERYLLIUM
PROVINCE O U
TERRITOIRE
B r i t i s h Columbia
N.T.S. AREA
104 P/!
REF. BE 1
RLGIONDU S.N. R.C.
I
NAME OF PROPERTY
NOM DE LA PROPRILT&
HISTORY OF EXPLORATION AND DEVELOPMENT
HISTORIQUE D E LrEXPLORATION E T D E LA MISE EN VALEUR
The p r o p e r t y i s l o c a t e d a t about 4,800 f e e t e l e v a t i o n on t h e
south s i d e of Needlepoint Mountain, 1 0 m i l e s south-southeast of
Zassiar
The d i s c o v e r y was made by Gerald Davis of McDame Lake and
2hristin.a Lake. The b e r y l l i u m c o n t e n t of t h e r o c k was discovered
3y t h e B r i t i s h Columbia Dept. of Mines a s a r e s u l t of a r o u t i n e
s p e c t r o g r a p h i c a n a l y s i s of a specimen submitted by M r . Davis f o r
s t i n assay.
Three c l a i m s , Low Grade Nos. 2, 3, & 4, were l o c a t e d i n June
1954 by J.J. McDougall f o r S t . Eugene Mining Corporation,
Limited. Some g e o l o g i c a l work was r e p o r t e d on t h e claims.
Spectrographic a n a l y s i s gave a range of .01-.l% t i n .
LOW GRADE
OBJECT LOCATE-D
OBJET LOCALISE
UNCERTAINTY
FACTEUR D'INCERTITUDE
Mining Division
Division miniere
at.
La t.
5g008'15"
Liard
County
Comt6
129'46
.
'
Cassiar
Township or Parish
Canton ou paroisse
Lot
Lot
Sec
Sect.
District
District
Long.
Long.
Concession or Range
Concession ou rang
TP.
Ct.
OWNER 0 R OPE RATORIPROPRI~TAIRE
R.
R.
OU EXPLOITANT
DESCB IPTlON OF DEPOSITIDESCRIPTION D U GISEMENT
H e l v i t e - d a n a l i t e i s p r e s e n t i n a magnetite-rich s k a r n i n
impure l i m e s t o n e n e a r i t s c o n t a c t w i t h g r a n i t i c rock of t h e
Cassiar batholith.
"A l e n t i c u l a r body of b l a c k s k a r n about 300 f e e t long and
35 f e e t i n maximum width l i e s w i t h i n a t h i n l e n s of impure
c r y s t a l l i n e limestone. It extends southeastward from t h e
c o n t a c t of t h e l a t t e r w i t h g r a n i t e i n a c r e e k g u l l y , becoming
narrower and p a s s i n g beneath overburden. A s m a l l g r a n i t e
tongue l i e s above t h e s k a r n and p a r a l l e l w i t h i t . A limestone
l e n s i s o v e r l a i n c h i e f l y by a r g i l l i t e and u n d e r l a i n c h i e f l y by
blue-gray q u a r t z i t e s c o n t a i n i n g numerous q u a r t z v e i n s , a l l
a p p a r e n t l y dipping s t e e p l y t o t h e n o r t h e a s t . Some p a t c h e s of
r e d and yellow gossan occur a l o n g t h e a r g i l l i t e s , which a r e
much c o n t o r t e d and f a u l t e d . There i s however, no evidence of
a major f a u l t along t h e c r e e k bottom, which marks t h e c o n t a c t .
he s k a r n i s mostly b l a c k b u t i n p a r t banded. The
massive b l a c k m a t e r i a l i s heavy and s t r o n g l y magnetic, and i s
a p p a r e n t l y composed l a r g e l y of magnetite, w i t h minor amounts
of c h l o r i t e , g a r n e t , and, l o c a l l y , s m a l l i r r e g u l a r a r e a s of
f l u o r i t e and q u a r t z . The b e r y l l i u m mineral, c l a s s e d a s
P.t.0.
Associated minerals or products , T i n , f l u o r s p a r
...,
Minhraux ou produits assocMs
Mineral Policy Sector, Department of ~ A e r ~Mines
y , and Resou~ces,Ottawa
Secteur de la politique minirale ministire de llEnergie, des Mines et des Ressources, Ottawa
502299
*
.-
- - -- - .. - -
~ESCRIPTION OF- DEPQSIT/DESCRIPTION DU GISEMENT
REFE RENCES/BIBLIOGRAPH/E
(contYnued)
d a n a l i t e by Thompson, i s a s u l p h i d e - s i l i c a t e of t h e h e l v i t e
group c o n t a i n i n g about 1 4 p e r c e n t BeO. I t i s r e d t o r e d d i s h
brown and similar t o g a r n e t i n appearance; i t occurs as
i n d i v i d u a l g r a i n s g e n e r a l l y less t h a n a mm and c l u s t e r s o r
s t r i n g e r s o c c a s i o n a l l y 20 mm long.
"According t o Holland, ' c l u s t e r s of g r a i n s a r e a s much a s $
inch across,
i t i s accompanied by a few small g r a i n s of
n a t i v e bismuth,
i t a p p e a r s t o b e l o c a l i z e d i n a massive
magnetite-rich c o r e i n t h e c e n t r e of t h e w i d e s t p a r t of t h e
s k a r n l e n s a t i t s northwest and
a v i s u a l examination of t h e
s k a r n i n d i c a t e s t h a t t h e b e r y l l i u m c o n t e n t i s low, c o n s i d e r a b l y
less t h a n 1 p e r c e n t ' .
Composite samples of m a t e r i a l c o l l e c t e d by t h e w r i t e r , b u t
n o t i n c l u d i n g p i e c e s c o n t a i n i n g v i s i b l e h e l v i t e , were r e p o r t e d
from s p e c t r o g r a p h i c a n a l y s i s t o c o n t a i n .02 and .015 per c e n t
Be. A specimen of t h e carbonate-rich phase c o n t a b e d 0.D04 p e r
c e n t . Samples of s l i g h t l y m i n e r a l i z e d h o r n f e l s from t h r e e
l o c a l i t i e s above t h e s k a r n showed Be i n a c o n c e n t r a t i o n of l e s s
t h a n 0.01 p e r c e n t . Three o t h e r s showed none. A sample of t h e
g r a n i t e i n t h e v i c i n i t y showed no Be."
(Mulligan, R., 1968).
...
...
...
Geology of Canadian Beryllium D e p o s i t s ;
ilulligan, R . ;
Economic Geology Report No. 23, p. 55, Geol. Surv.
of Canada, 1968.
McDame Map Area, C a s s i a r D i s t r i c t , B r i t i s h
Z a b r i e l s e , H.;
Columbia; Memoir 319, p. 122, Geol. Surv. of Canada,
1963.
Xeports of M i n i s t e r of Mines, B r i t i s h Columbia:
.;
Geology of Canadian Tin Occurrences;
Yulligan, R
Paper 64-54, p . 15, Geol. Surv. of Canada.
Thompson, R.M.;
MAP REFERENCES/R~F~RENCES
CARTOGRAPHIQUES
Map 104 P/4, Needlepoint Mountain, (Topo.), Sc. 1:50,000.
Map 1110 A, McDame, (Geol.)
Memoir 319.
, Sc.
1":4 miles
- accomp.
REMA RKSIREMARQUES
Cornp./ r h . par
Date
I
I
I
I
I
I
I
1955, p. 11.
1
B C I 104 P
.
- .
-
26
Canadian M i n e r a l o g i s t ;
Vol. 6, P t . 1, 1957.