General Information
Secondary Commodities: uranium, copper
Deposit Type(s): Iron Oxide Breccias & Veins (Wernecke Breccias)
Location(s): 65.150280 N, -134.7325 W
NTS Mapsheet(s): 106E02
Location Comments: .5 Kilometres
Hand Samples Available at YGS: No
Capsule
Work History
Staked as Yogi cl (Y95277) in Aug/74 by a joint venture between Norcen Energy Res L (Great Plains) & Kerr Addision ML, which carried out mapping and geochemical sampling in 1975. Restaked as Pass cl (YA30273) in May/78 by Ogilvie JV (Chevron Can L & Aquitaine), which explored with mapping, ground and airborne radiometric surveys and soil sampling.
The KL 1-196 cl (YB29775) were staked by Archer, Cathro and Associates (1981) Ltd in May/93 over this and three other occurrences, Minfile #s 106E 005, 106E 006 and 106E 031. Kennecott Canada Inc. optioned the property and explored with geological mapping and geochemical sampling in 1993.
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. Cambrian carbonate and siliciclastic rocks lie unconformably to the west. 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. Mineralization of Cu, Co, U and Au in and around the Wernecke Breccia zones has been the focus of mineral exploration in the area. There is a strong connection with age, environment, physical and mineralogical characteristics between Wernecke Breccia and other mineralized breccias like the Olympic Dam deposit in Australia (Thorkelson, 2000).
The Yogi group was staked on a lead-zinc-copper silt anomaly overlying limy argillite of the Early Proterozoic Quartet Group. Soil sampling failed to locate a source.
The Pass group was staked to cover brannerite occurrences peripheral to a breccia body. No geochemical anomalies were obtained.
References
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 PLAINS DEVELOPMENT COMPANY OF CANADA LTD, Sep/75. Assessment Report *#090028 by B.D. Farion.
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.
KENNECOTT CANADA INC, May/94. Assessment Report #093197 by R. Hulstein.
MINERAL INDUSTRY REPORT 1975, p. 68-69; 1978, p. 21.
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.
WERNECKE JOINT VENTURE, 1978. Assessment Report *#090418 by A.R. Archer.
Staked as Yogi cl (Y95277) in Aug/74 by a joint venture between Norcen Energy Res L (Great Plains) & Kerr Addision ML, which carried out mapping and geochemical sampling in 1975. Restaked as Pass cl (YA30273) in May/78 by Ogilvie JV (Chevron Can L & Aquitaine), which explored with mapping, ground and airborne radiometric surveys and soil sampling.
The KL 1-196 cl (YB29775) were staked by Archer, Cathro and Associates (1981) Ltd in May/93 over this and three other occurrences, Minfile #s 106E 005, 106E 006 and 106E 031. Kennecott Canada Inc. optioned the property and explored with geological mapping and geochemical sampling in 1993.
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. Cambrian carbonate and siliciclastic rocks lie unconformably to the west. 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. Mineralization of Cu, Co, U and Au in and around the Wernecke Breccia zones has been the focus of mineral exploration in the area. There is a strong connection with age, environment, physical and mineralogical characteristics between Wernecke Breccia and other mineralized breccias like the Olympic Dam deposit in Australia (Thorkelson, 2000).
The Yogi group was staked on a lead-zinc-copper silt anomaly overlying limy argillite of the Early Proterozoic Quartet Group. Soil sampling failed to locate a source.
The Pass group was staked to cover brannerite occurrences peripheral to a breccia body. No geochemical anomalies were obtained.
References
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 PLAINS DEVELOPMENT COMPANY OF CANADA LTD, Sep/75. Assessment Report *#090028 by B.D. Farion.
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.
KENNECOTT CANADA INC, May/94. Assessment Report #093197 by R. Hulstein.
MINERAL INDUSTRY REPORT 1975, p. 68-69; 1978, p. 21.
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.
WERNECKE JOINT VENTURE, 1978. Assessment Report *#090418 by A.R. Archer.
Location Map
Last Updated: Jul 6, 2018
Work History
| Year | Work Type | Comment |
|---|---|---|
| 1978 | Airborne Geophysics: Radiometric | |
| 1978 | Geochemistry: Soil | |
| 1978 | Geology: Bedrock Mapping | |
| 1978 | Other: Prospecting | |
| 1978 | Ground Geophysics: Radiometric Survey | |
| 1975 | Geochemistry: Soil | |
| 1975 | Geology: Bedrock Mapping |
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 |
|---|---|---|---|---|---|
| 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 | ||
| 095603 | 2006 | Assessment Report Describing Airborne Geophysics and Digital Data Compilation at the Win Property | Magnetic - Airborne Geophysics, Data Compilation - Pre-existing Data | ||
| 095590 | 2005 | Prospecting, Scintillometer and Gravity Survey at the Curie Property, Northeastern Yukon Territory | Rock - Geochemistry, Silt - Geochemistry, Soil - Geochemistry, Gravity Survey - Ground Geophysics, Scintillometer - Ground Geophysics, Prospecting - Other | ||
| 093197 | 1993 | Assessment Report on the 1993 Geological and Geochemical Investigation of the Kiwi Property KL 1-196 | Rock - Geochemistry, Silt - Geochemistry, Soil - Geochemistry, Bedrock Mapping - Geology | ||
| 062143 | 1982 | Bonnet Plume 1982 Water Sampling Program | Environmental Assessment/Impact - Studies | ||
| 062055 | 1980 | Report on Geology an Exploration of the Bonnet Plume Basin Yukon Territory | Diamond - Drilling, Bedrock Mapping - Geology, Regional Bedrock Mapping - Geology, Environmental Assessment/Impact - Studies, Resource Estimate - Studies | 53 | 10700 |
| 090418 | 1979 | Assessment Report on Airborne Radiometric, Geological, Geochemical, and Ground Radiometric Surveys | Gamma-Ray Spectrometry - Airborne Geophysics, Soil - Geochemistry, Bedrock Mapping - Geology, Gamma-ray Spectrometry - Ground Geophysics | ||
| 090028 | 1975 | Geological and Geochemical Evaluation of the Yogi Claims | Rock - Geochemistry, Silt - Geochemistry, Soil - Geochemistry, Bedrock Mapping - Geology |
