General Information
Secondary Commodities: chromium, iron
Aliases: Al, Chromite, Gail, Jay, Mink
Deposit Type(s): Ultramafic Mafic Podiform Chromite
Location(s): 60.715280 N, -137.783060 W
NTS Mapsheet(s): 115A12
Location Comments: .5 Kilometres
Hand Samples Available at YGS: No
Capsule
Work History
Staked as Chromite cl (63391) in Aug/52 by H. Versluce and C. Gibbons and restaked as Mink, etc cl (68959) in Jul/54 and AL, GAIL and Jay cl (72459) in Jun/56 by Stride E and Dev CL, which also staked 4.8 km of placer leases (1801-1803) covering a gravel fan at the mouth of Contact Creek.
Capsule Geology
A peridotite sill 1.6 km wide intrudes steeply dipping shale and sandstone of the Jurassic-Cretaceous Dezadeash Formation. Near its northern contact, along Contact Creek, the rock is medium to coarsely crystalline and strongly serpentinized, and contains clots of magnetite up to 2.5 cm across. Chromite occurs in fine-grained bands of peridotite which cut the coarser variety.
The best band, 15 to 25 cm wide, was traced for a length of 3 m and had a northwest strike and a dip of 50° to the northeast. A sample of black cobbles collected from the base of the stock by the GSC assayed 19.8% Cr and 11.5% Fe, the equivalent of about 45% chromite. Very fine platinum present in stream gravels at the foot of the mountain is probably derived from the peridotite body.
References
DODDS, C.J., AND CAMPBELL, R.B., 1992. Overview, legend and mineral deposit tabulations for Geological Survey of Canada Open Files 2188, 2189, 2190 and 2191.
GEOLOGICAL SURVEY OF CANADA Memoir 268, p. 56.
STRIDE EXPLORATION AND DEVELOPMENT CO. LTD, Jun/56. Prospectus Report by D.H. Simpson.
Staked as Chromite cl (63391) in Aug/52 by H. Versluce and C. Gibbons and restaked as Mink, etc cl (68959) in Jul/54 and AL, GAIL and Jay cl (72459) in Jun/56 by Stride E and Dev CL, which also staked 4.8 km of placer leases (1801-1803) covering a gravel fan at the mouth of Contact Creek.
Capsule Geology
A peridotite sill 1.6 km wide intrudes steeply dipping shale and sandstone of the Jurassic-Cretaceous Dezadeash Formation. Near its northern contact, along Contact Creek, the rock is medium to coarsely crystalline and strongly serpentinized, and contains clots of magnetite up to 2.5 cm across. Chromite occurs in fine-grained bands of peridotite which cut the coarser variety.
The best band, 15 to 25 cm wide, was traced for a length of 3 m and had a northwest strike and a dip of 50° to the northeast. A sample of black cobbles collected from the base of the stock by the GSC assayed 19.8% Cr and 11.5% Fe, the equivalent of about 45% chromite. Very fine platinum present in stream gravels at the foot of the mountain is probably derived from the peridotite body.
References
DODDS, C.J., AND CAMPBELL, R.B., 1992. Overview, legend and mineral deposit tabulations for Geological Survey of Canada Open Files 2188, 2189, 2190 and 2191.
GEOLOGICAL SURVEY OF CANADA Memoir 268, p. 56.
STRIDE EXPLORATION AND DEVELOPMENT CO. LTD, Jun/56. Prospectus Report by D.H. Simpson.
Location Map
Regional Geology - Terrane
Group: Insular
Affinity: E Pacific
Name: Taku (?)
Realm: Pacific
Regional Geology - Bedrock
Supergroup:
Group/Suite: Pyroxenite Creek
Formation:
Member:
Terrane:
Period Max: Cretaceous
Age Max: 124 MA
Period Min: Cretaceous
Age Min: 113 MA
Rock Major: hbl-bt granodiorite
Rock Minor:
Reference: Israel et al. (2014) - YGS OF 2014-18
Geological Unit (1M): EKP
Geological Unit (250K): EKP
Related References
| Number | Title | Page(s) | Document Type |
|---|---|---|---|
| 2014-18 | Preliminary bedrock geology of the Mt. Decoeli area (parts of NTS 115A/12, 13 and 115B/9, 16) | Open File (Geological - Bedrock) | |
| ARMC013572 | Memo re: Chafta Mines Ltd. - Kusawa Lake prospect | Miscellaneous Company Documents |
| Citations |
|---|
