Table 15. Major element analysis of dioritic rocks from Antler Formation and Snowshoe Group
ANTLER FORMATION
| SAMPLE 0-48 0-134 0-135 0-137 0-144A 0-155 | Sample numbers are prefixed with SCB8.
‘SiO, 45.8 Dice 50.2 48.8 54.6 50.7 Location of samples Latitude Longitude
soe = oa — as ve Le 0-48 Yuzkli Lake 53°12'05" 121°46'42""
aes a — ie ee ee bee 0-134 Aces Creek 53°11'43"" 121°50'32""
203 0-135 Aces Creek 53°11'48"" 121°50°32""
eee Ue e aft ] es 0-137 Aces Creek 53°11'56"" 121°50°32”
oe Sy - Se oe Bes 6.9 0-144a —-Yuzkli Creek 53°12'45"" 121°51'35"
whee = = = oe Ae oe 0-155 Yuzkli Creek 53°12'48"' 121°49'07""
sie ae oe Ss ae Se oe 0-101 Meadows Creek  53°08'45"" 121°45'38""
Ca0 Ue om 8.98 ’ Ce 8.59 0-111 Meadows Creek  53°09'28"" 121°47°03”"
ee s a as ik - = 0-130 Alves Creek 53°11'01"" 121248'59""
: = sc A Ree co a 1-100 Mount Campbell 52°59°41"" 121°46'34""
Be : a : 2 : 2 1-101 Font Creek 52°59'41"" 121°45'00"
Re : . - oe a - 1-278 Cariboo Mountain 52°52°30"" 121°34'25""
bee a ae ae net a xaG 1-296 Cariboo Mountain 52°52°32"" 121°32°17"
2 er ae ay ae ae ‘bos | 171027 Cariboo Mountain 52°51'56'’ 121°37°20"
| 1-1036 McMartin Creek  52°52'23" 121°30°57""
= oe = ee Me 1 009 | 41-1767 Keithley Creek 52°47°03"" 121°27°50"
Zr 001 009 011 004 005 007
Total 99.4 100.9 99.5 100.0 100.3 100 |
DIORITIC DYKES AND SILLS INTRUDING SNOWSHOE GROUP
SAMPLE 0-101 0-111 0-130 1-100 1-101 1-278 12565 Tih FOS on aaa
Si0, 51.3 50.3 48.9 50.0 47.7 48.6 49.7 51.4 48.6 53.0
‘TiO, 1.04 92 73 1.19 1.84 1.13 91 2.10 1.32 1.56
Al,03 14.3 12.9 16.9 15.3 14.4 15.6 13.4 17.3 14.5 14.9
Cr,03
Fe,0, 2.2 2.2 19 2.2 9.2 24 19 1.7 a7 2.4
/Fe0 7.0 6.9 6.3 6.4 7.0 6.9 7.0 8.2 74 8.5
MnO 17 20 17 18 47 18 M7 23 19 20
MgO 7.48 9.42 7.33 6.73 8.28 7.57 10.3 3.29 5.00 4.83
Ca0 10.3 11.7 10.1 11.3 11.3 10.6 11.2 6.65 8.12 8.42
Na,0 2.5 1.9 2.9 2.4 2.7 2.4 24 51 2.9 3.2
K>0 12 14 1.19 56 51 88 53 50 09 55
H,0 T 2.8 3.1 2.6 2.6 3.0 2.6 3.0 19 4.4 2.4
C0, 3 6 5 3 14 eS 2 2 56 1
PO; 11 09 08 14 23 1 10 63 14 16
S 0.00 0.00 0.00 0.00 0.00 0.00 09 0.00 03 12
Rb 004 002 005 004 003 005 003 006 002 005
Zn 010 009 008 007 010 008 008 012 010 009
Zr 006 004 006 005 009 005 007 026 007 009
Total 99.7 100.5 99.6 99.3 100.6 99.1 100.7 99.4 100.7 100.4

Mountain black phyllite along Antler Creek may be part
of the same generation as the Proserpine dykes.

Holland (1954, p. 23) described biscuit-coloured rhyo-
lite porphyry from the head of Luce and Little Snowshoe
creeks, which intruded parallel to the country rock folia-
tion but is not itself foliated or altered.

Economic geology

Barkerville Terrane hosts the principal gold occurrences
in the area; Mosquito Creek, Island Mountain, Cariboo
Gold Quartz, Cariboo Hudson and the Snowshoe and
Midas veins. Deposits of less economic importance
include those of silver, tungsten, lead, zinc and copper.
No attempt is made here to fully describe the economic
mineral occurrences within the gold belt as many of them
have been well documented by Bowman, (1895),
Johnston and Uglow (1926), Holland, (1954), Sutherland

64

Brown (1957) and Alldrick (1983). Recent exploration and
mining has concentrated in the areas of established miner-
alization as described by these authors. The location of
gold deposits correlates with elements of 1) the strati-
graphy, 2) the structure, and 3) the metamorphism. It is
suggested that the interrelationship of these three factors
has contributed to the localization of the gold deposits.
Stratigraphy, structure, and metamorphic controls of
mineralization have previously been noted by Hanson
(1935), Benedict (1945), Holland (1954), Sutherland
Brown (1957), and Alldrick (1983). The following discus-
sion emphasizes the interrelationship of the geological
components and relates the mineralization to the struc-
tural synthesis presented in this paper.

Stratigraphic controls: Both lode and placer deposits of
gold are associated primarily with the Downey succession.
Lode gold deposits are almost entirely confined to the
Paleozoic part of the Snowshoe Group (Fig. 47). The