General Information
Secondary Commodities: copper, tin, silver, gemstones
Deposit Type(s): Skarn Sn
Location(s): 60.219440 N, -131.589440 W
NTS Mapsheet(s): 105B04
Location Comments: .5 Kilometres
Hand Samples Available at YGS: No
Capsule
Work History
Staked as Can cl 1-56 (YA21333) in Jul/77 by DC Syndicate (Dome Mines Limited & Cominco Limited), which explored with geological mapping, magnetic geophysical and geochemical surveys in 1978 and 1979 and hand trenching in 1980. In 1981 the company drilled 3 diamond drill holes (182.3 m) and completed additional geological mapping, hand trenching and a second magnetic geophysical survey.
Restaked as Skarn cl 1-2 (YB93292) in Jul/2001 by I. Elash and Tanana Exploration Inc which carried out hand trenching later in the year. The claims were optioned to Strategic Metals Ltd in Aug/2002 which carried out a small hand trenching and prospecting program later in the month. Strategic dropped the option in Nov/2003 and returned the claims to Elash and Tanana Exploration Inc.
Capsule Geology
The area is located in the northeast corner of topographic map sheet 105B 04 and has been re-mapped by the Ancient Pacific Margin NATMAP Project (Roots et al., 2004). Cassiterite, malayaite and stanniferous garnet with magnetite and minor bornite, chalcopyrite, sphalerite and fluorite are developed in a marble skarn, (unit CPC) of the Permian and older Klinkit Group, located at the northeast margin of the Early Cretaceous Seagull batholith. The Klinkit rocks lie within the Yukon Tanana Terrane but overlie several of the pericratonic metasediments and metavolcanic assemblages (specifically the Big Salmon Complex and the Swift River Group/Dorsey Complex) and are thus considered by Roots to be a post-amalgamation overlap succession. Other exposures of Late Paleozoic limestone within the thermal aureole of Seagull batholith were closely investigated for tin and tungsten mineralization between 1978 and 1982 (for example Minfile Occurrences #105B 036, 040 and 084).
The mineralization occurs in skarn lenses measuring up to 7 m thick and 200 m long within a black marble member. The main mineralization occurs in magnetite-rich sections although traces of cassiterite were noted in an amphibole-rich section. Garnet rich skarn returned low tin assays. Hole 83-1 intersected 0.63% Sn over 3.5 m and 0.24% Sn over 5.8 m in skarn while Hole 81-1 cut 0.28% Sn, 6.9 g/t Ag and 0.5% Cu across 0.15 m in altered granite.
Tanana Exploration/Strategic Metals investigated the claims for their potential to host gem quality garnets. Most of the garnet crystals observed are < 0.5 cm in diameter and occur as aggregates and intergrowths within and along the selvages of the massive garnet bands. Other occurrences are associated with secondary calcite pods which tend to host better developed, larger individual crystals. Garnet color is primarily dark brown to yellow-brown and forest to epidote green. Very few specimens exhibit glassy transparent quality, however this is difficult to fully assess without extracting individual crystals from aggregate masses.
Dark green glassy vesuvianite crystals occur in 3 to 5 mm thick bands within an 8 m section of limestone located approximately 100 m west of the garnet bearing area. These crystals are tabular with a square cross section and are sometimes terminated by an irregular pyramid. Maximum size observed was 6 mm long by 2 mm in diameter.
Strategic Metals judged that the garnets were not of gem quality and although the vesuvianite appears glassy and semi-transparent, the crystals were quite small and generally intergrown, making segregation of individual crystals very difficult.
References
BRENCHLEY, M.M., Apr/82. Geology of the Can claim group, Y.T., a tin skarn deposit. Unpublished B.A.Sc. Thesis, Queen's University.
DC SYNDICATE, 1977. Assessment Report *#090323 by J.E. Chartier and J.C. Stephen.
DC SYNDICATE, May/79. Assessment Report #090460 by J.C. Stephen.
DC SYNDICATE, Mar/80. Assessment Report #090594 by J.C. Stephen.
DC SYNDICATE, Mar/82. Assessment Report #090992 by J.C. Stephen.
DC SYNDICATE, Mar/82. Assessment Report #092936 by J.C. Stephen.
DC SYNDICATE, 1982. Assessment Report *#090992 by J.C. Stephen.
MINERAL INDUSTRY REPORT 1977, p. 78; 1978, p. 58.
ROOTS, C.F., DE KEIJZER, M. AND NELSON, J.L., 2000. Wolf Lake project: Revision mapping of Dorsey Terrane assemblages in the upper Swift River area, southern Yukon and northern B.C. In: Yukon Exploration and Geology 1999, D.S. Emond and L.H. Weston (eds.), Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, p. 115-125.
ROOTS, C., NELSON, J., MIHALYNUK, M., HARMS, T., DE KEIJZER, M. AND SIMARD, R-L. 2004: Bedrock Geology Dorsey Lake, Yukon Territory: Yukon Geological Survey, Open File 2004-2, scale 1:50 000.
STRATEGIC METALS LTD, Dec/2002. Assessment Report #094348 by W.A. Wengzynowski.
YUKON GEOLOGY AND EXPLORATION 1979-80, p. 153-154.
YUKON EXPLORATION AND GEOLOGY 1981, p. 100.
Staked as Can cl 1-56 (YA21333) in Jul/77 by DC Syndicate (Dome Mines Limited & Cominco Limited), which explored with geological mapping, magnetic geophysical and geochemical surveys in 1978 and 1979 and hand trenching in 1980. In 1981 the company drilled 3 diamond drill holes (182.3 m) and completed additional geological mapping, hand trenching and a second magnetic geophysical survey.
Restaked as Skarn cl 1-2 (YB93292) in Jul/2001 by I. Elash and Tanana Exploration Inc which carried out hand trenching later in the year. The claims were optioned to Strategic Metals Ltd in Aug/2002 which carried out a small hand trenching and prospecting program later in the month. Strategic dropped the option in Nov/2003 and returned the claims to Elash and Tanana Exploration Inc.
Capsule Geology
The area is located in the northeast corner of topographic map sheet 105B 04 and has been re-mapped by the Ancient Pacific Margin NATMAP Project (Roots et al., 2004). Cassiterite, malayaite and stanniferous garnet with magnetite and minor bornite, chalcopyrite, sphalerite and fluorite are developed in a marble skarn, (unit CPC) of the Permian and older Klinkit Group, located at the northeast margin of the Early Cretaceous Seagull batholith. The Klinkit rocks lie within the Yukon Tanana Terrane but overlie several of the pericratonic metasediments and metavolcanic assemblages (specifically the Big Salmon Complex and the Swift River Group/Dorsey Complex) and are thus considered by Roots to be a post-amalgamation overlap succession. Other exposures of Late Paleozoic limestone within the thermal aureole of Seagull batholith were closely investigated for tin and tungsten mineralization between 1978 and 1982 (for example Minfile Occurrences #105B 036, 040 and 084).
The mineralization occurs in skarn lenses measuring up to 7 m thick and 200 m long within a black marble member. The main mineralization occurs in magnetite-rich sections although traces of cassiterite were noted in an amphibole-rich section. Garnet rich skarn returned low tin assays. Hole 83-1 intersected 0.63% Sn over 3.5 m and 0.24% Sn over 5.8 m in skarn while Hole 81-1 cut 0.28% Sn, 6.9 g/t Ag and 0.5% Cu across 0.15 m in altered granite.
Tanana Exploration/Strategic Metals investigated the claims for their potential to host gem quality garnets. Most of the garnet crystals observed are < 0.5 cm in diameter and occur as aggregates and intergrowths within and along the selvages of the massive garnet bands. Other occurrences are associated with secondary calcite pods which tend to host better developed, larger individual crystals. Garnet color is primarily dark brown to yellow-brown and forest to epidote green. Very few specimens exhibit glassy transparent quality, however this is difficult to fully assess without extracting individual crystals from aggregate masses.
Dark green glassy vesuvianite crystals occur in 3 to 5 mm thick bands within an 8 m section of limestone located approximately 100 m west of the garnet bearing area. These crystals are tabular with a square cross section and are sometimes terminated by an irregular pyramid. Maximum size observed was 6 mm long by 2 mm in diameter.
Strategic Metals judged that the garnets were not of gem quality and although the vesuvianite appears glassy and semi-transparent, the crystals were quite small and generally intergrown, making segregation of individual crystals very difficult.
References
BRENCHLEY, M.M., Apr/82. Geology of the Can claim group, Y.T., a tin skarn deposit. Unpublished B.A.Sc. Thesis, Queen's University.
DC SYNDICATE, 1977. Assessment Report *#090323 by J.E. Chartier and J.C. Stephen.
DC SYNDICATE, May/79. Assessment Report #090460 by J.C. Stephen.
DC SYNDICATE, Mar/80. Assessment Report #090594 by J.C. Stephen.
DC SYNDICATE, Mar/82. Assessment Report #090992 by J.C. Stephen.
DC SYNDICATE, Mar/82. Assessment Report #092936 by J.C. Stephen.
DC SYNDICATE, 1982. Assessment Report *#090992 by J.C. Stephen.
MINERAL INDUSTRY REPORT 1977, p. 78; 1978, p. 58.
ROOTS, C.F., DE KEIJZER, M. AND NELSON, J.L., 2000. Wolf Lake project: Revision mapping of Dorsey Terrane assemblages in the upper Swift River area, southern Yukon and northern B.C. In: Yukon Exploration and Geology 1999, D.S. Emond and L.H. Weston (eds.), Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, p. 115-125.
ROOTS, C., NELSON, J., MIHALYNUK, M., HARMS, T., DE KEIJZER, M. AND SIMARD, R-L. 2004: Bedrock Geology Dorsey Lake, Yukon Territory: Yukon Geological Survey, Open File 2004-2, scale 1:50 000.
STRATEGIC METALS LTD, Dec/2002. Assessment Report #094348 by W.A. Wengzynowski.
YUKON GEOLOGY AND EXPLORATION 1979-80, p. 153-154.
YUKON EXPLORATION AND GEOLOGY 1981, p. 100.
Location Map
Last Updated: Oct 9, 2019
Work History
Year | Work Type | Comment |
---|---|---|
2002 | Other: Prospecting | |
2002 | Trenching: Hand | |
2001 | Trenching: Hand | Carried out by Elash and Tanana Exploration Inc. |
1981 | Geology: Bedrock Mapping | Ground magnetic survey. |
1981 | Ground Geophysics: Magnetics | |
1981 | Trenching: Hand | |
1980 | Trenching: Hand | |
1979 | Geochemistry: Rock | Also soil and talus sampling. |
1979 | Geology: Bedrock Mapping | |
1978 | Geochemistry: Soil | Also silt samples. |
1978 | Geology: Bedrock Mapping | |
1978 | Ground Geophysics: Magnetics |
Regional Geology - Terrane
Group: Intermontane
Affinity: W Laurentia
Name: Yukon-Tanana
Realm: peri-Laurentian
Regional Geology - Bedrock
Supergroup:
Group/Suite: Klinkit
Formation:
Member:
Terrane: Yukon-Tanana
Period Max: Carboniferous
Age Max: 340 MA
Period Min: Carboniferous
Age Min: 300 MA
Rock Major: flows/breccia/tuffs/
Rock Minor:
Reference: Roots et al. (2004) - GSC OF 4630; YGS OF 2004-2
Geological Unit (1M): CK
Geological Unit (250K): CK1
Assessment Reports that overlap occurrence
Report Number | Year | Title | Worktypes | Holes Drilled | Meters Drilled |
---|---|---|---|---|---|
096722 | 2014 | STAKING, SOIL SAMPLING, PROSPECTING AND AIRBORNE GEOPHYSICS REPORT – SEAGULL TIN PROJECT | Magnetic - Airborne Geophysics, Rock - Geochemistry, Soil - Geochemistry | ||
096335 | 2012 | Airborne Geochemical Sample Survey - Seagull Tin Project | Silt - Geochemistry | ||
095455 | 2011 | Prospecting, Geological and Geochemical Surveys at the Seagull Tin Property | Rock - Geochemistry, Soil - Geochemistry, Detailed Bedrock Mapping - Geology, Prospecting - Other | ||
094348 | 2002 | Assessment Report Describing Geological Mapping and Prospecting on the M.C. Beryl Property | Rock - Geochemistry, Backhoe - Trenching | ||
090594 | 1980 | Survey and Sampling Report on the Can 29-40; 45-46 Mineral Claims | Rock - Geochemistry, Soil - Geochemistry, Detailed Bedrock Mapping - Geology | ||
090557 | 1979 | Klinkit Joint Venture (Du Pont of Canada Exploration Limited with Dival Mining Limited) 1979 Programme, Yukon Territory | Rock - Geochemistry, Soil - Geochemistry, Bedrock Mapping - Geology, Detailed Bedrock Mapping - Geology, Petrographic - Lab Work/Physical Studies, Prospecting - Other | ||
090460 | 1978 | Geological, Geochemical, and Geophysical Report on the Can 1-56 | Rock - Geochemistry, Silt - Geochemistry, Soil - Geochemistry, Bedrock Mapping - Geology, Magnetics - Ground Geophysics, Panning - Placer Processing | ||
090323 | 1978 | Geological, Geochemical Report on the Can 1-56 Mineral Claims | Rock - Geochemistry, Silt - Geochemistry, Detailed Bedrock Mapping - Geology |
Drill Core at YGS Core Library
Number | Property | Year Drilled | Core Size | Photos | Data |
---|---|---|---|---|---|
81-CAN-1 | Can | 1981 | NQ | 0 | 2 |
81-CAN-2 | Can | 1981 | NQ | 0 | 3 |
81-CAN-3 | Can | 1981 | NQ | 0 | 3 |