General Information
Secondary Commodities: antimony, arsenic, silver, mercury, gold
Aliases: Lee, Mcdade
Deposit Type(s): Vein & Disseminations Stibnite
Location(s): 62.140830 N, -136.955280 W
NTS Mapsheet(s): 115I02
Location Comments: .5 Kilometres
Hand Samples Available at YGS: No
Capsule
Work History
Staked as Lee cl (Y91483) in October 1974 by G. Dickson, who re-staked as part of a larger group including Nulee, JS, etc cl (YA94697) in May 1986 and explored with bulldozer trenching, soil sampling and mapping in 1986, 1987 and 1988.
In 2017, G. Prior staked the Lee cl 1-4 near the Rowlinson occurrence and carried out mapping and sampling of historical trenches as well as soil and silt sampling.
Regional & Property Geology
The occurrence is located in the Dawson Range within Yukon-Tanana Terrane (YTT). The rocks of the YTT in this region consist of Early Mississipian metamorphic rocks separated into meta-sedimentary and meta-igneous suites (Stroshein, 1998). The meta-sedimentary suite consists of micaceous quartz-feldspar gneiss, schist and quartzite of the Nasina Assemblage. The meta-igneous package is comprised of biotite-hornblende feldspar gneiss and coarse-grained granodiorite orthogneiss with lesser amphibolite.
The claims are underlain by biotite schist, assigned to the Carboniferous Simpson Range (MgSR by Colpron (2014). These rocks are locally intruded by Cretaceous porphyry, and gabbro to diorite plugs.
Mineralization & Results
Coarse stibnite occurs in a poorly exposed zone of discontinuous, narrow, en echelon quartz veins. The zone trends northeast, is 150 m wide and 25 m long and cuts a schist unit. A grab sample containing about 20% stibnite assayed less than 0.34 g/t Au and 0.07 g/t Ag.
Rock samples of poorly exposed stibnite-bearing quartz veins taken in 1986 returned up to 31, 206 ppm Sb with minor gold and silver.
Staked as Lee cl (Y91483) in October 1974 by G. Dickson, who re-staked as part of a larger group including Nulee, JS, etc cl (YA94697) in May 1986 and explored with bulldozer trenching, soil sampling and mapping in 1986, 1987 and 1988.
In 2017, G. Prior staked the Lee cl 1-4 near the Rowlinson occurrence and carried out mapping and sampling of historical trenches as well as soil and silt sampling.
Regional & Property Geology
The occurrence is located in the Dawson Range within Yukon-Tanana Terrane (YTT). The rocks of the YTT in this region consist of Early Mississipian metamorphic rocks separated into meta-sedimentary and meta-igneous suites (Stroshein, 1998). The meta-sedimentary suite consists of micaceous quartz-feldspar gneiss, schist and quartzite of the Nasina Assemblage. The meta-igneous package is comprised of biotite-hornblende feldspar gneiss and coarse-grained granodiorite orthogneiss with lesser amphibolite.
The claims are underlain by biotite schist, assigned to the Carboniferous Simpson Range (MgSR by Colpron (2014). These rocks are locally intruded by Cretaceous porphyry, and gabbro to diorite plugs.
Mineralization & Results
Coarse stibnite occurs in a poorly exposed zone of discontinuous, narrow, en echelon quartz veins. The zone trends northeast, is 150 m wide and 25 m long and cuts a schist unit. A grab sample containing about 20% stibnite assayed less than 0.34 g/t Au and 0.07 g/t Ag.
Rock samples of poorly exposed stibnite-bearing quartz veins taken in 1986 returned up to 31, 206 ppm Sb with minor gold and silver.
Location Map
Last Updated: Oct 30, 2020
Work History
| Year | Work Type | Comment |
|---|---|---|
| 2017 | Geochemistry: Rock | Sampling of historical trenches. |
| 2017 | Geochemistry: Soil | |
| 2017 | Geology: Bedrock Mapping | |
| 1988 | Geology: Bedrock Mapping | |
| 1988 | Trenching: Mechanical | |
| 1987 | Geology: Bedrock Mapping | |
| 1987 | Trenching: Mechanical | |
| 1986 | Geology: Bedrock Mapping | |
| 1986 | Trenching: Mechanical | |
| 1974 | Other | |
| 1973 | Trenching | Discovered stibnite mineralization. |
Regional Geology - Terrane
Group: Intermontane
Affinity: W Laurentia
Name: Yukon-Tanana
Realm: peri-Laurentian
Regional Geology - Bedrock
Supergroup:
Group/Suite: Simpson Range
Formation:
Member:
Terrane: Yukon-Tanana
Period Max: Carboniferous
Age Max: 355 MA
Period Min: Carboniferous
Age Min: 345 MA
Rock Major: orthogneiss
Rock Minor: amphibolite/qt-mica-schist/phyllite
Reference: Colpron (2014) - revision
Geological Unit (1M): MSR
Geological Unit (250K): MgSR
Assessment Reports that overlap occurrence
| Report Number | Year | Title | Worktypes | Holes Drilled | Meters Drilled |
|---|---|---|---|---|---|
| 092599 | 1987 | Report on the 1988 Geological and Geochemical Assesssment Work on the McDade Property | Rock - Geochemistry, Silt - Geochemistry, Soil - Geochemistry, Regional Bedrock Mapping - Geology, Prospecting - Other, Stripping - Placer Processing, Backhoe - Trenching | ||
| 091918 | 1986 | Geological and Geochemical Report on the McDade Property | Interpretation - Airphotography, Rock - Geochemistry, Silt - Geochemistry, Soil - Geochemistry, Regional Bedrock Mapping - Geology, Mechanical - Trenching |
Related References
| Number | Title | Page(s) | Document Type |
|---|---|---|---|
| ARMC016611 | Geochemical map - 115I/2 - Mount McDade | Geochemical Map |
| Citations |
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