Unnamed Occurrence (ARDF - TL054; near Mt. Foraker), Yentna Mining District, Denali Borough, Alaska, USAi
Regional Level Types | |
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Unnamed Occurrence (ARDF - TL054; near Mt. Foraker) | - not defined - |
Yentna Mining District | Mining District |
Denali Borough | Borough |
Alaska | State |
USA | Country |
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Latitude & Longitude (WGS84):
62° 56' 13'' North , 151° 17' 16'' West
Latitude & Longitude (decimal):
Köppen climate type:
Mindat Locality ID:
201826
Long-form identifier:
mindat:1:2:201826:6
GUID (UUID V4):
f12765e4-9393-4784-9e2d-45b02ee3e45d
This site is located within Denali National Park and Preserve.
Location: Reed and others (1978, locality 33) show this occurrence on southeast flank of Mt. Foraker, about 3.2 miles southeast from the summit, in the northwest quarter of Section 24, T. 33 N., R. 11 W., of the Seward Meridian within Denali National Park and Preserve.
Geology: The area is underlain by Paleozoic argillite (Pzus) and Middle to Upper Devonian limestone (Dl) that are cut by the middle Tertiary (38 m.y.) granodiorite of the Mt. Foraker pluton (Tf) (Reed and Nelson, 1980). Disseminated pyrite, chalcopyrite and other sulfides occur in sheared sedimentary rocks. Nearby float contains massive arsenopyrite with up to 0.45 oz/ton gold (Reed and others, 1978).
Workings: Reconnaissance mapping, stream silt and rock sampling (Reed and others, 1978; Reed and Nelson, 1980) are all that have been described here. Nearby float contains massive arsenopyrite with up to 0.45 oz/ton gold (Reed and others, 1978).
Age: Middle Tertiary; mineralization is interpreted to be related to the Mt. Foraker pluton which is described as a 38 m.y. old pluton Reed and Nelson (1980).
Commodities (Major) - Ag, Au, Cu, Mo; (Minor) - As
Development Status: No
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
4 valid minerals.
Detailed Mineral List:
ⓘ Arsenopyrite Formula: FeAsS |
ⓘ Chalcopyrite Formula: CuFeS2 |
ⓘ Gold Formula: Au |
ⓘ Pyrite Formula: FeS2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 1 - Elements | |||
---|---|---|---|
ⓘ | Gold | 1.AA.05 | Au |
Group 2 - Sulphides and Sulfosalts | |||
ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
ⓘ | Pyrite | 2.EB.05a | FeS2 |
ⓘ | Arsenopyrite | 2.EB.20 | FeAsS |
List of minerals for each chemical element
S | Sulfur | |
---|---|---|
S | ⓘ Arsenopyrite | FeAsS |
S | ⓘ Chalcopyrite | CuFeS2 |
S | ⓘ Pyrite | FeS2 |
Fe | Iron | |
Fe | ⓘ Arsenopyrite | FeAsS |
Fe | ⓘ Chalcopyrite | CuFeS2 |
Fe | ⓘ Pyrite | FeS2 |
Cu | Copper | |
Cu | ⓘ Chalcopyrite | CuFeS2 |
As | Arsenic | |
As | ⓘ Arsenopyrite | FeAsS |
Au | Gold | |
Au | ⓘ Gold | Au |
Other Databases
Link to USGS - Alaska: | TL054 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Farewell-McGrath DomainDomain
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