General Information
Secondary Commodities: copper, lead, silver, zinc
Deposit Type(s): Skarn Pb-Zn
Location(s): 61°46'3" N - -130°2'33" W
NTS Mapsheet(s): 105G16
Location Comments: 1 Kilometres
Hand Samples Available: No
Last Reviewed:
Capsule
Work History
Staked as Jake cl 1-80 (Y16443) by Atlas Explorations Ltd in Oct/66. Restaked as Jake cl 1-80 (YA28765) in Jun/78 by F. Hastings.
Restaked by D. Brett as JK cl 1-42 (YB56362) in Oct/94. Brett carried out a small prospecting program in the fall of 1995. In Apr/96 Brett optioned the claims to Pacific Bay Minerals Ltd which carried out an helicopter-borne geophysical program, followed by geological mapping, prospecting and geochemical sampling programs later in the year.
Capsule Geology
The area has not been re-mapped by the Yukon Geology Program. A geological compilation by Gordey and Makepeace (1999) suggests that the area is underlain by a shallow marine, miogeoclinal sequence of carbonate and clastic sedimentary rocks. The rocks range in age from Upper Proterozoic to Mississippian and form part the Cassiar Platform. The mid-Cretaceous McEvoy granitic plug intrudes the sequence to the west.
Atlas Exploration mapped over 20 base metal showings on their claim block, most of which consisted of disseminated Cu, Pb and Zn in altered granitic rocks or in quartzite and chert. Selected samples assayed 82.3 g/t to 490.3 g/t Ag, 0.18 to 16.2% Cu and 0.2 to 9.2% Pb and up to 3.6% Zn.
Prospecting by Harman (1996) and company revealed a 1.5 m wide massive sulphide occurrence of pyrite, chalcopyrite, sphalerite, and minor galena in foliated, gossanous chloritic schist as well as several localities with gossanous boulders in float. Harman did not report any assays.
Pacific Bay re-mapped the property in 1996. They noted 7 base metal showings which appeared controlled by and localized along, major fault zones cutting miogeoclinal strata. Mineralization mainly occurs as weak to moderate disseminated sulphides commonly associated with various alteration mineral assemblages. The majority of the showings occur in fault or breccia zones associated with faults, although some sulphides are hosted within bull quartz veins. Exact stratigraphic units are uncertain, but Pacific Bay¿s field descriptions suggests that the mineralization is hosted in Silurian to Middle Devonian quartzite or chert.
The helicopter-borne geophysical survey outlined 3 large magnetic complexes, 4 conductive horizons and 1 resistivity low. Soil sampling outlined a 1.6 km long by 1.0 km wide anomaly centred over the main area of mineralization. The anomaly was strongly anomalous for Zn, Pb, Cu, Ag, Cd, V and Mo and weakly anomalous for Fe, Mn, Ni and Co. Rock sampling of the various mineralized showings generally confirmed historic values.
Pacific Bay theorized that mineralization on the claims is intrusive related and a porphyry style deposit may exist at depth.
References
ATLAS EXPLORATIONS LTD, 1966. Annual Report, p. 6.
ATLAS EXPLORATIONS LTD, Oct/67. Assessment Report #019792 by J.S. Brock.
BRETT, D, Apr/96. Assessment Report #093405 by A.G. Harman.
GEOLOGICAL SURVEY OF CANADA, Open File 486.
GORDEY, S.P., AND MAKEPEACE, A.J., 1999. Yukon Digital geology, S.P. Gordey and A.J. Makepeace (comp.); Geological Survey of Canada, Open File D3826, and Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, Open File 1999-1 (D)
PACIFIC BAY MINERALS LTD, Apr/97. Assessment Report #093589 by G. Wesa.
Staked as Jake cl 1-80 (Y16443) by Atlas Explorations Ltd in Oct/66. Restaked as Jake cl 1-80 (YA28765) in Jun/78 by F. Hastings.
Restaked by D. Brett as JK cl 1-42 (YB56362) in Oct/94. Brett carried out a small prospecting program in the fall of 1995. In Apr/96 Brett optioned the claims to Pacific Bay Minerals Ltd which carried out an helicopter-borne geophysical program, followed by geological mapping, prospecting and geochemical sampling programs later in the year.
Capsule Geology
The area has not been re-mapped by the Yukon Geology Program. A geological compilation by Gordey and Makepeace (1999) suggests that the area is underlain by a shallow marine, miogeoclinal sequence of carbonate and clastic sedimentary rocks. The rocks range in age from Upper Proterozoic to Mississippian and form part the Cassiar Platform. The mid-Cretaceous McEvoy granitic plug intrudes the sequence to the west.
Atlas Exploration mapped over 20 base metal showings on their claim block, most of which consisted of disseminated Cu, Pb and Zn in altered granitic rocks or in quartzite and chert. Selected samples assayed 82.3 g/t to 490.3 g/t Ag, 0.18 to 16.2% Cu and 0.2 to 9.2% Pb and up to 3.6% Zn.
Prospecting by Harman (1996) and company revealed a 1.5 m wide massive sulphide occurrence of pyrite, chalcopyrite, sphalerite, and minor galena in foliated, gossanous chloritic schist as well as several localities with gossanous boulders in float. Harman did not report any assays.
Pacific Bay re-mapped the property in 1996. They noted 7 base metal showings which appeared controlled by and localized along, major fault zones cutting miogeoclinal strata. Mineralization mainly occurs as weak to moderate disseminated sulphides commonly associated with various alteration mineral assemblages. The majority of the showings occur in fault or breccia zones associated with faults, although some sulphides are hosted within bull quartz veins. Exact stratigraphic units are uncertain, but Pacific Bay¿s field descriptions suggests that the mineralization is hosted in Silurian to Middle Devonian quartzite or chert.
The helicopter-borne geophysical survey outlined 3 large magnetic complexes, 4 conductive horizons and 1 resistivity low. Soil sampling outlined a 1.6 km long by 1.0 km wide anomaly centred over the main area of mineralization. The anomaly was strongly anomalous for Zn, Pb, Cu, Ag, Cd, V and Mo and weakly anomalous for Fe, Mn, Ni and Co. Rock sampling of the various mineralized showings generally confirmed historic values.
Pacific Bay theorized that mineralization on the claims is intrusive related and a porphyry style deposit may exist at depth.
References
ATLAS EXPLORATIONS LTD, 1966. Annual Report, p. 6.
ATLAS EXPLORATIONS LTD, Oct/67. Assessment Report #019792 by J.S. Brock.
BRETT, D, Apr/96. Assessment Report #093405 by A.G. Harman.
GEOLOGICAL SURVEY OF CANADA, Open File 486.
GORDEY, S.P., AND MAKEPEACE, A.J., 1999. Yukon Digital geology, S.P. Gordey and A.J. Makepeace (comp.); Geological Survey of Canada, Open File D3826, and Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, Open File 1999-1 (D)
PACIFIC BAY MINERALS LTD, Apr/97. Assessment Report #093589 by G. Wesa.
Work History
| Date | Work Type | Comment |
|---|---|---|
| 12/31/1996 | Geochemistry | Also lithogeochemical samples. |
| 12/31/1996 | Geology | |
| 12/31/1996 | Geochemistry | |
| 12/31/1996 | Airborne Geophysics | Also VLF-EM survey. |
| 12/31/1995 | Other | |
| 12/31/1967 | Geochemistry | |
| 12/31/1967 | Geology | |
| 12/31/1967 | Geochemistry | |
| 12/31/1967 | Ground Geophysics | Also magnetic survey. Appears to be reconnaissance in nature. No results reported. |
Assessment Reports that overlap occurrence
| Report Number | Year | Title | Worktypes | Holes Drilled | Meters Drilled |
|---|---|---|---|---|---|
| 095215 | 2009 | Assessment Report Describing Soil Sampling, Prospecting, Geological Mapping and Hand Trenching at the Jake Property | Soil - Geochemistry, Detailed Bedrock Mapping - Geology, Prospecting - Other, Hand - Trenching | ||
| 095071 | 2008 | Geological and Geochemical Assessment Report Jake 1-16 Claims | Rock - Geochemistry, Silt - Geochemistry, Soil - Geochemistry, Regional Bedrock Mapping - Geology, Prospecting - Other | ||
| 095015 | 2007 | Assessment Report Describing Geophysical Surveys on the Jake Property | Magnetic - Airborne Geophysics, VTEM - Airborne Geophysics | ||
| 094831 | 2006 | Assessment Report Describing Prospecting and Soil Geochemistry at the Jake Property | Soil - Geochemistry, Prospecting - Other | ||
| 093517 | 1996 | Report on a Combined Helicopter-Borne Electromagnetic, Magnetic and VLF-EM Survey | Electromagnetic - Airborne Geophysics, Magnetic - Airborne Geophysics | ||
| 093589 | 1996 | Geological and Geochemical Report on the JK Property JK1 to 42 Claims | Electromagnetic - Airborne Geophysics, Magnetic - Airborne Geophysics, Rock - Geochemistry, Soil - Geochemistry, Bedrock Mapping - Geology, Prospecting - Other | ||
| 093405 | 1995 | Prospector Report JK Claims | Prospecting - Other | ||
| 019792 | 1967 | A Summary of Exploration to September 30, 1967: Sheldon Area, Fire Lake | Electromagnetic - Airborne Geophysics, Magnetic - Airborne Geophysics, Winter Road - Development, Surface, Soil - Geochemistry, Regional Bedrock Mapping - Geology, EM - Ground Geophysics, Magnetics - Ground Geophysics, Mechanical - Trenching |
Related References
| Number | Title | Page(s) | Reference Type | Document Type |
|---|---|---|---|---|
| ARMC017627 | Map of McEvoy Lake grid (north side) showing samples taken - AY9R | Property File Collection | Geochemical Map | |
| ARMC017628 | Map of McEvoy Lake grid showing samples taken - AY9S-#s | Property File Collection | Geochemical Map | |
| BROCK000051 | East Jake group geology - Photo pverlay of A12185-389 - Ross River (Y.T) | Property File Collection | Geoscience Map (Geological - Bedrock) | |
| BROCK000052 | Geochemical soil sampling survey - PB contours - E. Jake mineral claims - Sheldon region - Ross River (Y.T) | Property File Collection | Geochemical Map | |
| BROCK000053 | Geology - Jake mineral claims | Property File Collection | Geoscience Map (Geological - Bedrock) | |
| BROCK000054 | Geochemical results - Cu, Pb, Zn, Ba in PPM - 105 G 16 | Property File Collection | Geochemical Map | |
| BROCK000055 | Geochemical sample stations - 105 G 16 | Property File Collection | Geochemical Map | |
| BROCK000021 | Regional geology map with hand-coloured markings - Ross River, Sheldon area | Property File Collection | Geoscience Map (Geological - Bedrock) |