General Information
Secondary Commodities: chromium, palladium, platinum
Deposit Type(s): Ultramafic Mafic Podiform Chromite
Location(s): 60°26'50" N - -133°43'56" W
NTS Mapsheet(s): 105C05
Location Comments: .5 Kilometres
Hand Samples Available: No
Last Reviewed:
Capsule
Work History
Staked as Rose cl 1-2 (60372) & Jack cl 1-8 (60374) in May/51 by the Smith family, who performed hand trenching and mapping in 1951-52.
Restaked as Cro cl 1-18 (YA95998) in Aug/86 by Dodgex Ltd, which performed prospecting and sampling in 1987. J. Golany staked LLD cl 1-25 (YB35907) four kilometers to the north in Jun/91.
Restaked as Sun cl 1-14 (YB57313) in Nov/94 by R. Hamel. In Apr/95 R. Stack staked Sun cl 15-38 (YB57491) on the southwest boundary of Hamel's Sun claims. Stack's Sun claims extend southwest to cover Minfile Occurrence #105C 011.
Restaked as FHA cl 1-4 (YC19462) in May/2002 by G. McLeod who carried out a small rock sampling program in Sep/2002. McLeod added FH cl 5-20 (YC19854) in Nov/2002.
Capsule Geology
The area is located on the north side of the Alaskan Highway approximately 25 km west of Johnsons Crossing and 5 km southwest of Squanga Lake and was re-mapped at 1: 250 000 scale in 1994 by Gordey and Stevens. The area is located entirely within the oceanic Cache Creek Terrane, a terrane composed of structurally complex successions of Mississippian to Jurassic basalt, carbonate, chert and greywacke and ultramafite.
The original occurrence was discovered by J. Dodge in 1987, who traced a float train of chromite-bearing dunite boulders back to an exposed massive banded, tabular zone of dunite measuring approximately 4 m wide and at least 20 m long. The dunite is part of a layered ultramafic sequence, Carboniferous to Triassic in age that includes basal harzburgite, interlayered harzburgite and dunite and an upper succession of gabbro-pyroxenite-andesite. The sequence is weakly to strongly serpentinized and intruded by a few scattered monzonite plugs and dykes of Early Cretaceous age. A few short-fibre asbestos veins occur along the eastern edge of the ultramafic body. A 1 m chip sample collected across the exposed portion of the zone assayed 33.5% chromium oxide, 145 ppb platinum and 2 ppb palladium.
McLeod restaked the occurrence for its potential to host platinum group elements (PGE¿s). Thirteen grab samples collected from the ultramafics and analyzed using inductively coupled plasma (ICP) returned values ranging from 1 474 to 2 293 ppm nickel, 37 to 105 ppm cobalt and 27 to 953 ppm chromium. A grab sample collected from the chromite occurrence returned a low value of 310 ppm Cr. A replicate of this sample analyzed using nickel fusion followed by ICP returned values of 683 ppb ruthenium, 417 ppb iridium, 406 ppb osmium, 159 ppb platinum, 70 ppb rhodium and 5 ppb palladium for a total combined PGE value of 1 740 ppb.
References
ASH, C.H. AND ARKSEY, R.L., 1990: The Atlin ultramafic allochthon: ophiolitic basement within the Cache Creek terrane; tectonic and metallogenic significance (104 N/12); in Geological Fieldwork 1989, British Columbia Ministry of Energy, Mines and Petroleum Resources, Geological Survey Branch, Paper 1990-1, p. 365-374.
DODGEX LTD, Sep/87. Assessment Report #091740 by J.S. Dodge.
GORDEY, S.P. AND MAKEPEACE, A.J. 2003: Yukon Digital Geology, version 2.0, S.P. Gordey and A.J. Makepeace (comp); Geological Survey of Canada, Open File 1749 and Yukon Geological Survey, Open File 2003-9 (D).
GORDEY, S.P. AND STEVENS, R.A., 1994a:Tectonic framework of the Teslin region, southern Yukon Territory; in Current Research 1994-A; Geological Survey of Canada, p.11-18
GORDEY, S.P. AND STEVENS, R.A., 1994b: Preliminary interpretation of the bedrock geology of the Teslin area (105C), southern Yukon; Geological Survey of Canada, Open file 2886 (map, scale 1:250 000).
GORDEY, S.P. MCNICOLL, V.J. AND MORTENSEN, J.K., 1998: New U-Pb ages from the Teslin area, southern Yukon, and their bearing on terrane evolution in the northern Cordillera; in Radiogenic Age and Isotopic Studies: Report 11: Geological Survey of Canada, Current Research 1998-F, p. 129-148.
MCLEOD, G., 2002. Assessment Report #094341 by M.Beauregard.
YUKON EXPLORATION 1987, p. 88.
YUKON EXPLORATION AND GEOLOGY 2002, p. 15, 24.
Staked as Rose cl 1-2 (60372) & Jack cl 1-8 (60374) in May/51 by the Smith family, who performed hand trenching and mapping in 1951-52.
Restaked as Cro cl 1-18 (YA95998) in Aug/86 by Dodgex Ltd, which performed prospecting and sampling in 1987. J. Golany staked LLD cl 1-25 (YB35907) four kilometers to the north in Jun/91.
Restaked as Sun cl 1-14 (YB57313) in Nov/94 by R. Hamel. In Apr/95 R. Stack staked Sun cl 15-38 (YB57491) on the southwest boundary of Hamel's Sun claims. Stack's Sun claims extend southwest to cover Minfile Occurrence #105C 011.
Restaked as FHA cl 1-4 (YC19462) in May/2002 by G. McLeod who carried out a small rock sampling program in Sep/2002. McLeod added FH cl 5-20 (YC19854) in Nov/2002.
Capsule Geology
The area is located on the north side of the Alaskan Highway approximately 25 km west of Johnsons Crossing and 5 km southwest of Squanga Lake and was re-mapped at 1: 250 000 scale in 1994 by Gordey and Stevens. The area is located entirely within the oceanic Cache Creek Terrane, a terrane composed of structurally complex successions of Mississippian to Jurassic basalt, carbonate, chert and greywacke and ultramafite.
The original occurrence was discovered by J. Dodge in 1987, who traced a float train of chromite-bearing dunite boulders back to an exposed massive banded, tabular zone of dunite measuring approximately 4 m wide and at least 20 m long. The dunite is part of a layered ultramafic sequence, Carboniferous to Triassic in age that includes basal harzburgite, interlayered harzburgite and dunite and an upper succession of gabbro-pyroxenite-andesite. The sequence is weakly to strongly serpentinized and intruded by a few scattered monzonite plugs and dykes of Early Cretaceous age. A few short-fibre asbestos veins occur along the eastern edge of the ultramafic body. A 1 m chip sample collected across the exposed portion of the zone assayed 33.5% chromium oxide, 145 ppb platinum and 2 ppb palladium.
McLeod restaked the occurrence for its potential to host platinum group elements (PGE¿s). Thirteen grab samples collected from the ultramafics and analyzed using inductively coupled plasma (ICP) returned values ranging from 1 474 to 2 293 ppm nickel, 37 to 105 ppm cobalt and 27 to 953 ppm chromium. A grab sample collected from the chromite occurrence returned a low value of 310 ppm Cr. A replicate of this sample analyzed using nickel fusion followed by ICP returned values of 683 ppb ruthenium, 417 ppb iridium, 406 ppb osmium, 159 ppb platinum, 70 ppb rhodium and 5 ppb palladium for a total combined PGE value of 1 740 ppb.
References
ASH, C.H. AND ARKSEY, R.L., 1990: The Atlin ultramafic allochthon: ophiolitic basement within the Cache Creek terrane; tectonic and metallogenic significance (104 N/12); in Geological Fieldwork 1989, British Columbia Ministry of Energy, Mines and Petroleum Resources, Geological Survey Branch, Paper 1990-1, p. 365-374.
DODGEX LTD, Sep/87. Assessment Report #091740 by J.S. Dodge.
GORDEY, S.P. AND MAKEPEACE, A.J. 2003: Yukon Digital Geology, version 2.0, S.P. Gordey and A.J. Makepeace (comp); Geological Survey of Canada, Open File 1749 and Yukon Geological Survey, Open File 2003-9 (D).
GORDEY, S.P. AND STEVENS, R.A., 1994a:Tectonic framework of the Teslin region, southern Yukon Territory; in Current Research 1994-A; Geological Survey of Canada, p.11-18
GORDEY, S.P. AND STEVENS, R.A., 1994b: Preliminary interpretation of the bedrock geology of the Teslin area (105C), southern Yukon; Geological Survey of Canada, Open file 2886 (map, scale 1:250 000).
GORDEY, S.P. MCNICOLL, V.J. AND MORTENSEN, J.K., 1998: New U-Pb ages from the Teslin area, southern Yukon, and their bearing on terrane evolution in the northern Cordillera; in Radiogenic Age and Isotopic Studies: Report 11: Geological Survey of Canada, Current Research 1998-F, p. 129-148.
MCLEOD, G., 2002. Assessment Report #094341 by M.Beauregard.
YUKON EXPLORATION 1987, p. 88.
YUKON EXPLORATION AND GEOLOGY 2002, p. 15, 24.
Work History
| Date | Work Type | Comment |
|---|---|---|
| 12/31/2002 | Studies | McLeoad carried out small sampling program. |
| 12/31/1987 | Other | |
| 12/31/1987 | Other | |
| 12/31/1951 | Geology | |
| 12/31/1951 | Trenching |
Assessment Reports that overlap occurrence
| Report Number | Year | Title | Worktypes | Holes Drilled | Meters Drilled |
|---|---|---|---|---|---|
| 095220 | 2009 | Holdfast Claims Report | Rock - Geochemistry, Soil - Geochemistry, Prospecting - Other | ||
| 094341 | 2002 | 2002 Platinum Group Element Sampling of Ultramafic Rocks, FHA 1-4 Claim Group | Rock - Geochemistry, Detailed Bedrock Mapping - Geology | ||
| 091740 | 1987 | Geological Report; CRO 1-7 and 7 Quartz Claims | Rock - Geochemistry, Bedrock Mapping - Geology, Backhoe - Trenching |