General Information
Secondary Commodities: mercury, silver, lead, zinc
Deposit Type(s): Sediment hosted Mississippi Valley-Type Pb-Zn (MVT)
Location(s): 64.104440 N, -132.880280 W
NTS Mapsheet(s): 106C02
Location Comments: Coordinates supplied by ATAC 2019
Hand Samples Available at YGS: No
Capsule
Work History
Staked within Leah cl 1-206 (YA13185) in Oct/76 by a syndicate composed of Newhawk Gold Mines Ltd (formerly Highhawk Mines Ltd), Tenajon Silver Inc (formerly Envoy Resources Ltd), Sproatt Silver Mines Ltd, Hecate Gold Corporation and Suneva Resources Ltd (formerly Bow River Resources Ltd), which explored with mapping and geochem sampling in 1977. The claims were then optioned to a joint venture between Northgate Mines Ltd and Westfield Minerals Ltd, which continued the program later in the year. In 1979, Northair Mines Ltd carried out a Maxmin EM survey over geochem anomalies.
Capsule Geology
The occurrence lies within the Selwyn Basin, a predominantly off-shelf metasedimentary and metavolcanic sequence that formed at the western margin of the North American craton. The area is underlain by Upper Proterozoic to Lower Cambrian siliciclastic and carbonate metasedimentary rocks of the the Hyland Group. Hyland Group rocks are unconformably (?) overlain by Cambrian-Devonian Bouvette Formation limestones and rocks of the Devono-Mississippian Earn Group including black siliceous shale, chert and minor occurrences of felsic volcanic rocks and associated barite. Rocks in the area have been deformed to various degrees by regional faulting and thrusting resulting in younger units being juxtaposed against older units. The south-dipping Dawson Thrust Fault lies to the north of the occurrence.
Cinnabar and native mercury occur in a small fracture zone cutting Late Proterozoic dolomite in a block above the Dawson Thrust on Leah 3 claim. The showing is about 5 m long and 1 m wide. Several conductors were outlined by the 1979 EM survey, some of which correlated with lead-zinc-silver soil anomalies.
Staked within Leah cl 1-206 (YA13185) in Oct/76 by a syndicate composed of Newhawk Gold Mines Ltd (formerly Highhawk Mines Ltd), Tenajon Silver Inc (formerly Envoy Resources Ltd), Sproatt Silver Mines Ltd, Hecate Gold Corporation and Suneva Resources Ltd (formerly Bow River Resources Ltd), which explored with mapping and geochem sampling in 1977. The claims were then optioned to a joint venture between Northgate Mines Ltd and Westfield Minerals Ltd, which continued the program later in the year. In 1979, Northair Mines Ltd carried out a Maxmin EM survey over geochem anomalies.
Capsule Geology
The occurrence lies within the Selwyn Basin, a predominantly off-shelf metasedimentary and metavolcanic sequence that formed at the western margin of the North American craton. The area is underlain by Upper Proterozoic to Lower Cambrian siliciclastic and carbonate metasedimentary rocks of the the Hyland Group. Hyland Group rocks are unconformably (?) overlain by Cambrian-Devonian Bouvette Formation limestones and rocks of the Devono-Mississippian Earn Group including black siliceous shale, chert and minor occurrences of felsic volcanic rocks and associated barite. Rocks in the area have been deformed to various degrees by regional faulting and thrusting resulting in younger units being juxtaposed against older units. The south-dipping Dawson Thrust Fault lies to the north of the occurrence.
Cinnabar and native mercury occur in a small fracture zone cutting Late Proterozoic dolomite in a block above the Dawson Thrust on Leah 3 claim. The showing is about 5 m long and 1 m wide. Several conductors were outlined by the 1979 EM survey, some of which correlated with lead-zinc-silver soil anomalies.
Location Map
Last Updated: Mar 3, 2020
Work History
| Year | Work Type | Comment |
|---|---|---|
| 1979 | Ground Geophysics: EM | Max-min EM survey. |
| 1977 | Geochemistry: Soil | |
| 1977 | Geology: Bedrock Mapping | |
| 1977 | Other: Prospecting |
Regional Geology - Terrane
Group: Ancestral North America
Affinity: W Laurentia
Name: North America - basinal strata
Realm: Laurentia
Regional Geology - Bedrock
Supergroup: Windermere
Group/Suite: upper
Formation: Blueflower
Member: undivided
Terrane: Laurentia
Period Max: Ediacaran
Age Max: 635 MA
Period Min: Cambrian
Age Min: 542 MA
Rock Major: variably calcareous mudstone, sandstone, grit, quartzite, conglomerate, limestone
Rock Minor:
Reference: Moynihan (2016) - YGS OF 2016-2
Geological Unit (1M): uPB
Geological Unit (250K): uPB
Assessment Reports that overlap occurrence
| Report Number | Year | Title | Worktypes | Holes Drilled | Meters Drilled |
|---|---|---|---|---|---|
| 096607 | 2012 | Assessment Report Describing Metallurgical Testing, Wildlife Monitoring, Heritage Evaluation, and Water Quality and Climate Monitoring Surveys | Water - Geochemistry, Metallurgical Tests - Lab Work/Physical Studies, Environmental Assessment/Impact - Studies, Heritage/Archeological - Studies | ||
| 096597 | 2012 | Assessment Report Describing Geochemical Sampling, Auger Sampling, Geological Mapping, Diamond Drilling, and Geophysical Surveys | Air Strip - Development, Surface, Auger - Drilling, Diamond - Drilling, Rock - Geochemistry, Silt - Geochemistry, Soil - Geochemistry, Bedrock Mapping - Geology, EM - Ground Geophysics, Gravity Survey - Ground Geophysics, Magnetics - Ground Geophysics, Prospecting - Other, Hand - Trenching | 172 | 37340.37 |
| 095938 | 2011 | Assessment Report Describing Geochemical Sampling, Geological Mapping and Remote Sensing Surveys at the Rackla Gold Property | Rock - Geochemistry, Silt - Geochemistry, Soil - Geochemistry, Bedrock Mapping - Geology, LIDAR - Remote Sensing, Heritage/Archeological - Studies | ||
| 090309 | 1977 | Geological, Goechemical and Geophysical Report, Sian Claim Group | Soil - Geochemistry, Bedrock Mapping - Geology, Magnetics - Ground Geophysics, Self-Potential - Ground Geophysics | ||
| 090226 | 1977 | Geochemical and Geological Report on Leah 1-206 and Sandy 1-7 | Soil - Geochemistry, Prospecting - Other |
Related References
| Number | Title | Page(s) | Document Type |
|---|---|---|---|
| 2016-1 | Yukon bedrock geology map | Open File (Geological - Bedrock) |
| Citations |
|---|
| MINERAL INDUSTRY REPORT 1977, p. 35-36. |
| YUKON GEOLOGY AND EXPLORATION 1979-80, p. 224. |
