General Information
Secondary Commodities: copper
Deposit Type(s): Iron Oxide Breccias & Veins (Wernecke Breccias)
Location(s): 64.8850 N, -133.458060 W
NTS Mapsheet(s): 106C14
Location Comments: .5 Kilometres
Hand Samples Available at YGS: No
Capsule
Work History
Staked as Lad & Ent cl (Y32402) in Apr/69 and acquired by Vulcan Mining Ltd, which prospected the claims in 1970. Restaked as Lad cl (Y57423) in March/72 by Cypress Resources Ltd, which added additional Lad cl(Y68406) in Aug/72.
The showing was partially covered by the southeast corner of the Ore cl (Y88612), which was staked in May/74 by D. Waugh and mapped and sampled later in the year by Phelps Dodge Corporation of Canada Ltd.
In Oct/94 D & J Hajek staked the Bloom cl 1-38 (YB43576) north of the showing. In Feb/95 Hajek transferred the Bloom claims to West Lake Ltd which carried out a trenching and prospecting program later in the summer. Hajek staked BL cl 55-62 (YB65749) to the northeast in Jul/96.
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 east, Wernecke Supergroup rocks are unconformably overlain by Middle Proterozoic Pinguicula Group 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.
Several small chalcopyrite showings are associated with limy argillite of the Fairchild Lake Group. One showing containing disseminated chalcopyrite was reported to have a length of 45 to 60 m. Although the nearest breccia occurrence is over 1 km to the north (Thorkelson, 2000), mineralization is similar to that found in and around other breccia zones in the Dolores Creek area.
References
CYPRESS RESOURCES LTD, Apr/72. Prospectus Report by R.S. Adamson.
GEORGE CROSS NEWSLETTER, 15 Sep/72.
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.
THORKELSON, D.J. AND WALLACE, C.A., 1995. Geology and mineral occurrences of the "Dolores Creek" map area (106C/14), Wernecke Mountains, northeastern Yukon. In: Yukon Exploration and Geology, 1994. Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, p. 19-30.
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.
WEST LAKE LTD, Mar/96. Assessment Report #093510 by J.H. Hajek.
Staked as Lad & Ent cl (Y32402) in Apr/69 and acquired by Vulcan Mining Ltd, which prospected the claims in 1970. Restaked as Lad cl (Y57423) in March/72 by Cypress Resources Ltd, which added additional Lad cl(Y68406) in Aug/72.
The showing was partially covered by the southeast corner of the Ore cl (Y88612), which was staked in May/74 by D. Waugh and mapped and sampled later in the year by Phelps Dodge Corporation of Canada Ltd.
In Oct/94 D & J Hajek staked the Bloom cl 1-38 (YB43576) north of the showing. In Feb/95 Hajek transferred the Bloom claims to West Lake Ltd which carried out a trenching and prospecting program later in the summer. Hajek staked BL cl 55-62 (YB65749) to the northeast in Jul/96.
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 east, Wernecke Supergroup rocks are unconformably overlain by Middle Proterozoic Pinguicula Group 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.
Several small chalcopyrite showings are associated with limy argillite of the Fairchild Lake Group. One showing containing disseminated chalcopyrite was reported to have a length of 45 to 60 m. Although the nearest breccia occurrence is over 1 km to the north (Thorkelson, 2000), mineralization is similar to that found in and around other breccia zones in the Dolores Creek area.
References
CYPRESS RESOURCES LTD, Apr/72. Prospectus Report by R.S. Adamson.
GEORGE CROSS NEWSLETTER, 15 Sep/72.
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.
THORKELSON, D.J. AND WALLACE, C.A., 1995. Geology and mineral occurrences of the "Dolores Creek" map area (106C/14), Wernecke Mountains, northeastern Yukon. In: Yukon Exploration and Geology, 1994. Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, p. 19-30.
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.
WEST LAKE LTD, Mar/96. Assessment Report #093510 by J.H. Hajek.
Location Map
Last Updated: Sep 15, 2011
Work History
| Year | Work Type | Comment |
|---|---|---|
| 1995 | Other | |
| 1995 | Trenching | |
| 1974 | Geology: Bedrock Mapping | |
| 1974 | Other | |
| 1974 | Other | |
| 1972 | Other | |
| 1970 | Other | |
| 1969 | Other |
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/dolostone
Rock Minor:
Reference: Thorkelson & Wallace (1998) - YGS GM 1998-11
Geological Unit (1M): lPFL
Geological Unit (250K): lPFL1
Assessment Reports that overlap occurrence
| Report Number | Year | Title | Worktypes | Holes Drilled | Meters Drilled |
|---|---|---|---|---|---|
| 095634 | 2007 | YUP February Internal Technical Report, Season 2007 Describing Mapping, Prospecting and Diamond Drilling at the Lumina Property | Gamma-Ray Spectrometry - Airborne Geophysics, Diamond - Drilling, Drill Core - Geochemistry, Rock - Geochemistry, Detailed Bedrock Mapping - Geology, Regional Bedrock Mapping - Geology, Scintillometer - Ground Geophysics, Prospecting - Other | 15 | 4367.20 |
| 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 |
| 094953 | 2006 | Assessment Report Describing Airborne Geophysics, Mapping, Prospecting and Diamond Drilling | Gamma-Ray Spectrometry - Airborne Geophysics, Magnetic - Airborne Geophysics, Diamond - Drilling, Drill Core - Geochemistry, Bedrock Mapping - Geology, Prospecting - Other | 22 | 2602.89 |
| 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 | ||
| 019048 | 1968 | Engineering Report, Year 1968 on the Mammoth Copper Property | Air Strip - Development, Surface, Winter Road - Development, Surface, Silt - Geochemistry, Detailed Bedrock Mapping - Geology, Prospecting - Other, Backhoe - Trenching |
