General Information
Secondary Commodities: antimony, bismuth, copper, gold, silver, zinc
Deposit Type(s): Vein Polymetallic Ag-Pb-Zn+/-Au
Location(s): 63.582780 N, -131.4275 W
NTS Mapsheet(s): 105O11
Location Comments: .5 Kilometres
Hand Samples Available at YGS: No
Capsule
Work History
Staked as Scronk cl 1-9 (YB03818) in Aug/90 by S. Ebert and G. Couture, who performed geological mapping, silt and rock geochemistry and petrographic work in the same year.
Restaked as Fan cl 1-10 (YB65330) in May/96 by Eagle Plains Resources Ltd and Miner River Resources Ltd, which carried out reconnaissance geological mapping and rock sampling program later in the year.
Capsule Geology
The area is located in the north-central portion of the Selwyn Basin, near the boundary with the Mackenzie Platform. The area is underlain by Paleozoic sedimentary rocks which have been intruded by mid-Cretaceous granitic intrusions.
The occurrence overlies the intrusive contact between a small mid-Cretaceous, mesocratic porphyritic syenite stock assigned to the Tombstone Suite and a north dipping, Middle to Upper Silurian age, succession of slates, argillites and cherts assigned to the Road River Assemblage. Mineralized veins occur in joints and fractures of the syenite porphyry. The veins range from a few mm to 0.5 m wide and make up 7 to 15% of the rock. They are vuggy, with coarse euhedral quartz crystals and contain variable amounts of sulphides ranging from 5 to 100%. Arsenopyrite is usually the dominant sulphide mineral, but occasionally galena predominates. The quartz-arsenopyrite veins within the intrusion returned Au values ranging from 0.5 g/t to 21 g/t while galena rich veins are very argentifeous with one sample returning 416 g/t Ag.
A set of subparallel veins extends outward from the intrusion into the surrounding succession of slate and argillite; these veins contain mostly arsenopyrite, with lesser amounts of pyrite, pyrrhotite, galena, sphalerite, tetrahedrite, stibnite, chalcopyrite and possible disseminated gold. Arsenopyrite rich veins returned 1.5 to 6 g/.t Au, while polymetallic veins returned Au values up to 36 g/t.
In general, vein widths vary from a few millimetres up to 15 cm with an average width of around 2 cm. Due to steep terrain and the weathered nature of outcrops, vein density is difficult to estimate but Ebert estimated them to be as much as 10% or more. Within the shales and argillites disseminations and pods (1.5 by 0.5 cm) of pyrite, pyrrhotite and arsenopyrite occur between and around the subparallel veins. These pods of sulphides may indicate abundant fluid activity during the mineralization event.
Eagle Plaines and Miner Rivers¿ exploration results generally matched those reported by Ebert and Couture. The companies best selected grab samples returned 14.0 g/t Au and 2 000 ppm Bi and 9.4 g/t Au and 157 ppm Bi.
References
EBERT, S., Feb/91. Assessment Report #092956 by S. Ebert.
EAGLE PLAINS RESOURCES LTD AND MINER RIVER RESOURCES LTD, May/97. Assessment Report #093614 by J.R. Dickie.
GORDEY, S.P., AND MAKEPEACE, A.J., 1999. Yukon digital geology, S.P. Gordey and A.J. Makepeace (comp.); Geological Survey of Canada, Open File D3826, and Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, Open File 1999-1 (D).
Staked as Scronk cl 1-9 (YB03818) in Aug/90 by S. Ebert and G. Couture, who performed geological mapping, silt and rock geochemistry and petrographic work in the same year.
Restaked as Fan cl 1-10 (YB65330) in May/96 by Eagle Plains Resources Ltd and Miner River Resources Ltd, which carried out reconnaissance geological mapping and rock sampling program later in the year.
Capsule Geology
The area is located in the north-central portion of the Selwyn Basin, near the boundary with the Mackenzie Platform. The area is underlain by Paleozoic sedimentary rocks which have been intruded by mid-Cretaceous granitic intrusions.
The occurrence overlies the intrusive contact between a small mid-Cretaceous, mesocratic porphyritic syenite stock assigned to the Tombstone Suite and a north dipping, Middle to Upper Silurian age, succession of slates, argillites and cherts assigned to the Road River Assemblage. Mineralized veins occur in joints and fractures of the syenite porphyry. The veins range from a few mm to 0.5 m wide and make up 7 to 15% of the rock. They are vuggy, with coarse euhedral quartz crystals and contain variable amounts of sulphides ranging from 5 to 100%. Arsenopyrite is usually the dominant sulphide mineral, but occasionally galena predominates. The quartz-arsenopyrite veins within the intrusion returned Au values ranging from 0.5 g/t to 21 g/t while galena rich veins are very argentifeous with one sample returning 416 g/t Ag.
A set of subparallel veins extends outward from the intrusion into the surrounding succession of slate and argillite; these veins contain mostly arsenopyrite, with lesser amounts of pyrite, pyrrhotite, galena, sphalerite, tetrahedrite, stibnite, chalcopyrite and possible disseminated gold. Arsenopyrite rich veins returned 1.5 to 6 g/.t Au, while polymetallic veins returned Au values up to 36 g/t.
In general, vein widths vary from a few millimetres up to 15 cm with an average width of around 2 cm. Due to steep terrain and the weathered nature of outcrops, vein density is difficult to estimate but Ebert estimated them to be as much as 10% or more. Within the shales and argillites disseminations and pods (1.5 by 0.5 cm) of pyrite, pyrrhotite and arsenopyrite occur between and around the subparallel veins. These pods of sulphides may indicate abundant fluid activity during the mineralization event.
Eagle Plaines and Miner Rivers¿ exploration results generally matched those reported by Ebert and Couture. The companies best selected grab samples returned 14.0 g/t Au and 2 000 ppm Bi and 9.4 g/t Au and 157 ppm Bi.
References
EBERT, S., Feb/91. Assessment Report #092956 by S. Ebert.
EAGLE PLAINS RESOURCES LTD AND MINER RIVER RESOURCES LTD, May/97. Assessment Report #093614 by J.R. Dickie.
GORDEY, S.P., AND MAKEPEACE, A.J., 1999. Yukon digital geology, S.P. Gordey and A.J. Makepeace (comp.); Geological Survey of Canada, Open File D3826, and Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, Open File 1999-1 (D).
Location Map
Last Updated: Sep 15, 2011
Work History
| Year | Work Type | Comment |
|---|---|---|
| 1996 | Geochemistry: Rock | Program was reconnaissance in nature. |
| 1996 | Geology: Bedrock Mapping | Program was reconnaissance in nature. |
| 1990 | Geochemistry: Rock | |
| 1990 | Geochemistry: Silt | |
| 1990 | Geology: Bedrock Mapping |
Regional Geology - Terrane
Group: Ancestral North America
Affinity: W Laurentia
Name: North America - basinal strata
Realm: Laurentia
Regional Geology - Bedrock
Supergroup:
Group/Suite: Mayo
Formation:
Member:
Terrane:
Period Max: Cretaceous
Age Max: 98 MA
Period Min: Cretaceous
Age Min: 93 MA
Rock Major: granite/quartz monzonite/granodiorite
Rock Minor:
Reference: Cecile & Abbott (1989) - GSC OF 2076
Geological Unit (1M): mKM
Geological Unit (250K): mKqM
Assessment Reports that overlap occurrence
| Report Number | Year | Title | Worktypes | Holes Drilled | Meters Drilled |
|---|---|---|---|---|---|
| 096026 | 2011 | Assessment Report, 2011 Surface Geochemical Exploration Program | Rock - Geochemistry, Silt - Geochemistry, Soil - Geochemistry | ||
| 093827 | 1997 | 1997 Geological Assessment Report on Emerald Lake Claims | Rock - Geochemistry, Silt - Geochemistry, Soil - Geochemistry | ||
| 093614 | 1996 | Geological Assessment Report for the Rog 1-14 and Fan 1-10 Mineral Claims | Rock - Geochemistry, Detailed Bedrock Mapping - Geology | ||
| 092956 | 1991 | Assessment Report Geological Descriptions of the Christina and Scronk Claims | Rock - Geochemistry, Silt - Geochemistry, Petrographic - Lab Work/Physical Studies | ||
| 091076 | 1982 | The Geology of the Old Cabin Claims | Detailed Bedrock Mapping - Geology, Process/Interpret - Pre-existing Data | ||
| 019809 | 1968 | Hess Area Project Proposed Property Follow-Up 1968 Field Season | Research/Summarize - Pre-existing Data | ||
| 019033 | 1968 | Atlas Explorations Limited Project Report 1968 Hess River Area | Silt - Geochemistry, Soil - Geochemistry, Regional Bedrock Mapping - Geology | ||
| 018947 | 1967 | Hess River Project Report | Rock - Geochemistry, Soil - Geochemistry, Detailed Bedrock Mapping - Geology | ||
| 019032 | 1967 | Hess River Project Report | Data Compilation - Pre-existing Data |
Related References
| Number | Title | Page(s) | Document Type |
|---|---|---|---|
| ARMC008209 | Topographic map showing Cu, Pb, and Zn geochemical values - Arrowhead Pass area | Geochemical Map | |
| ARMC008013 | Geochemical sample map - Old Cabin Creek area | Geochemical Map | |
| ARMC008023 | Geology of claim map - Old Cabin Creek area | Geoscience Map (Geological - Bedrock) | |
| ARMC018192 | Field sheet of 105O with notations | Geoscience Map (General) | |
| ARMC018193 | Field sheet of 105O Niddery Lake with geology notations | Geoscience Map (General) |
| Citations |
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