General Information
Secondary Commodities: uranium, copper
Deposit Type(s): Iron Oxide Breccias & Veins (Wernecke Breccias)
Location(s): 65.057220 N, -134.435560 W
NTS Mapsheet(s): 106E01
Location Comments: .5 Kilometres
Hand Samples Available at YGS: No
Capsule
Work History
Staked as the Thor cl (YA1755) in Feb/76 by Great Bear Mg L, which changed its name to Aries Res, Inc. in 1977 and performed mapping and radiometric surveys in 1976 and 1977. The Sol cl (YA6891) were fringe staked to the west in Sep/76 by A. Harman. The GSTD cl (YA1818) were tied on to the north in Feb/76 by A. Harman and optioned to Golden Standard ML, which conducted geochemical surveys later in the year.
Capsule Geology
The region is underlain by a metamorphosed and altered sequence of Early Proterozoic Wernecke Supergroup clastic and carbonate rocks (Fairchild Lake Group, Quartet Group and Gillespie Lake Group, from oldest to youngest) that are intruded by Early to Middle Proterozoic mafic sills and dykes, and cut by Middle Proterozoic Wernecke Breccia. To the west, Wernecke Supergroup rocks are unconformably overlain by Cambrian carbonate and siliciclastic rocks. According to Thorkelson (2000), Wernecke Breccia development is best modeled as a set of hydrothermal and/or phreatic breccias; brecciation being caused by explosive expanson of volatile-rich fluids. Hunt (2005) attributed Wernecke Breccia formation to periodic over-pressuring of dominantly basinal fluids, which lead to repeated brecciation of host strata and mineral precipitation.
Disseminated brannerite and chalcopyrite are found in an area 15 by 90 m, in hematitic, weakly bleached, chloritized and feldspathized Early Proterozoic Quartet Group argillite peripheral to a 30 m thick Wernecke Breccia body. Chalcopyrite was also found in quartz veins in argillite.
A grab sample from a 3 m square area of the breccia assayed 0.04% U3O8, while a chip sample across a 3 m section of mineralized breccia assayed only 0.04% Cu and 0.002% U3O8. Two weak uranium geochemical anomalies were reported on the GSTD cl but no mineralization was discovered.
References
ARIES RESOURCES LTD, Aug/77. Assessment Report #090304 by C.K. Ikona.
GEORGE CROSS NEWSLETTER, 20 Sep/76, 14 Dec/76.
GOLDEN STANDARD MINES LTD, Oct/76. Assessment Report #090171 by C.K. Ikona.
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).
GREAT BEAR MINES LTD, Dec/76. Assessment Report #090208 by C.K. Ikona.
HUNT, J., 2005. The geology and genesis of iron oxide-copper-gold mineralisation associated with Wernecke Breccia, Yukon Canada, PhD thesis, James Cook University, Australia, 2 volumes, 120 p.
MINERAL INDUSTRY REPORT 1976, p. 128-129; 1977, p. 26.
THORKELSON, D.J. AND WALLACE, C.A., 2000. Geology and mineral occurrences of the Slats Creek, Fairchild Lake and ¿Dolores Creek¿ areas, Wernecke Mountains, Yukon (106D/16, 106C/13, 106C/14). Exploration and Geological Services Division, Yukon Region, Indian and Northern Affairs Canada, Bulletin 10, 73 p.
Staked as the Thor cl (YA1755) in Feb/76 by Great Bear Mg L, which changed its name to Aries Res, Inc. in 1977 and performed mapping and radiometric surveys in 1976 and 1977. The Sol cl (YA6891) were fringe staked to the west in Sep/76 by A. Harman. The GSTD cl (YA1818) were tied on to the north in Feb/76 by A. Harman and optioned to Golden Standard ML, which conducted geochemical surveys later in the year.
Capsule Geology
The region is underlain by a metamorphosed and altered sequence of Early Proterozoic Wernecke Supergroup clastic and carbonate rocks (Fairchild Lake Group, Quartet Group and Gillespie Lake Group, from oldest to youngest) that are intruded by Early to Middle Proterozoic mafic sills and dykes, and cut by Middle Proterozoic Wernecke Breccia. To the west, Wernecke Supergroup rocks are unconformably overlain by Cambrian carbonate and siliciclastic rocks. According to Thorkelson (2000), Wernecke Breccia development is best modeled as a set of hydrothermal and/or phreatic breccias; brecciation being caused by explosive expanson of volatile-rich fluids. Hunt (2005) attributed Wernecke Breccia formation to periodic over-pressuring of dominantly basinal fluids, which lead to repeated brecciation of host strata and mineral precipitation.
Disseminated brannerite and chalcopyrite are found in an area 15 by 90 m, in hematitic, weakly bleached, chloritized and feldspathized Early Proterozoic Quartet Group argillite peripheral to a 30 m thick Wernecke Breccia body. Chalcopyrite was also found in quartz veins in argillite.
A grab sample from a 3 m square area of the breccia assayed 0.04% U3O8, while a chip sample across a 3 m section of mineralized breccia assayed only 0.04% Cu and 0.002% U3O8. Two weak uranium geochemical anomalies were reported on the GSTD cl but no mineralization was discovered.
References
ARIES RESOURCES LTD, Aug/77. Assessment Report #090304 by C.K. Ikona.
GEORGE CROSS NEWSLETTER, 20 Sep/76, 14 Dec/76.
GOLDEN STANDARD MINES LTD, Oct/76. Assessment Report #090171 by C.K. Ikona.
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).
GREAT BEAR MINES LTD, Dec/76. Assessment Report #090208 by C.K. Ikona.
HUNT, J., 2005. The geology and genesis of iron oxide-copper-gold mineralisation associated with Wernecke Breccia, Yukon Canada, PhD thesis, James Cook University, Australia, 2 volumes, 120 p.
MINERAL INDUSTRY REPORT 1976, p. 128-129; 1977, p. 26.
THORKELSON, D.J. AND WALLACE, C.A., 2000. Geology and mineral occurrences of the Slats Creek, Fairchild Lake and ¿Dolores Creek¿ areas, Wernecke Mountains, Yukon (106D/16, 106C/13, 106C/14). Exploration and Geological Services Division, Yukon Region, Indian and Northern Affairs Canada, Bulletin 10, 73 p.
Location Map
Last Updated: Jun 26, 2018
Work History
| Year | Work Type | Comment |
|---|---|---|
| 1977 | Geochemistry: Rock | |
| 1977 | Geology: Bedrock Mapping | |
| 1977 | Ground Geophysics: Scintillometer | Also magnetic survey. |
| 1976 | Geochemistry: Silt | |
| 1976 | Geology: Bedrock Mapping | |
| 1976 | Ground Geophysics: Radiometric Survey |
Regional Geology - Terrane
Group: Ancestral North America
Affinity: W Laurentia
Name: North America - platformal strata
Realm: Laurentia
Regional Geology - Bedrock
Supergroup: Wernecke
Group/Suite: Fairchild Lake
Formation:
Member:
Terrane: Laurentia
Period Max: Statherian
Age Max: 1800 MA
Period Min: Statherian
Age Min: 1600 MA
Rock Major: siltstone, sandstone
Rock Minor:
Reference: Thorkelson et al. (2002) - YGS GM 2002-2
Geological Unit (1M): lPFL
Geological Unit (250K): lPFL1
Assessment Reports that overlap occurrence
| Report Number | Year | Title | Worktypes | Holes Drilled | Meters Drilled |
|---|---|---|---|---|---|
| 095646 | 2007 | 2007 Geological, Geochemical and Geophysical Report on the Werneckes Project | Diamond - Drilling, Rock - Geochemistry, Silt - Geochemistry, Soil - Geochemistry, Detailed Bedrock Mapping - Geology, Regional Bedrock Mapping - Geology, Magnetics - Ground Geophysics, Scintillometer - Ground Geophysics, Prospecting - Other, Backhoe - Trenching, Hand - Trenching, Handblast - Trenching | 28 | 6537.96 |
| 094954 | 2006 | Mineral Exploration Report for the Curie Property, North Central, Yukon Territory | Electromagnetic - Airborne Geophysics, Gamma-Ray Spectrometry - Airborne Geophysics, Magnetic - Airborne Geophysics, Rock - Geochemistry, Silt - Geochemistry, Soil - Geochemistry, Bedrock Mapping - Geology, Gravity Survey - Ground Geophysics, Research/Summarize - Pre-existing Data, Backhoe - Trenching | ||
| 094956 | 2006 | 2006 Geological, Geochemical and Geophysical Report on the Werneckes Project | Reverse Circulation - Airborne Geophysics, Rock - Geochemistry, Soil - Geochemistry, Bedrock Mapping - Geology, Scintillometer - Ground Geophysics, Prospecting - Other | ||
| 090969 | 1981 | Geological, Geochemical and Geophysical Report on the Pike Claims | Rock - Geochemistry, Soil - Geochemistry, Bedrock Mapping - Geology, Gamma-ray Spectrometry - Ground Geophysics, Hand - Trenching | ||
| 090304 | 1977 | Aries Resources Ltd. Geological & Geophysical Report on the Thor Mineral Claims | Bedrock Mapping - Geology, Gamma-ray Spectrometry - Ground Geophysics, Magnetics - Ground Geophysics, Prospecting - Other | ||
| 090171 | 1976 | Geological and Geochemical Report on the Thor Mineral Claims | Silt - Geochemistry, Bedrock Mapping - Geology, Prospecting - Other |
