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Unnamed Occurrence (ARDF - WI079; northwest of head of Jay Creek), Koyukuk Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - WI079; northwest of head of Jay Creek) | - not defined - |
| Koyukuk Mining District | Mining District |
| Yukon-Koyukuk Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
67° 25' 23'' North , 151° 16' 51'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This occurrence is located about 6 miles southeast of Mathews Dome and 2 miles northeast of the junction of Jay and Rye Creeks. The occurrence is at an elevation of about 4,000 feet, at about the center of section 14, T. 30 N., R. 17 W., of the Fairbanks Meridian. The location is accurate.
Geology: This occurrence consists of sulfide-bearing greenschist. Dillon and others (1981, sample 477 [AOF 133B]) collected a rock sample of fine-grained greenschist containing disseminated chalcopyrite and possibly tetrahedrite. The sample contains 11.0 ppm silver, 1,360 ppm copper, and 320 ppm molybdenum. A rubble sample collected by the Bureau of Land Management at this location consists of greenschist with disseminated chalcopyrite and magnetite, but no tetrahedrite (Kurtak and others, 1999, Plate 1, Map no. 93). They also collected an outcrop sample of quartz-chlorite-magnetite schist. Analyses of these samples shows no valuable metals.
Workings: Only surface sampling.
Commodities (Major) - Cu; (Minor) - Ag, Mo
Development Status: None
Deposit Model: Polymetallic vein (?) (Cox and Singer, 1986; model 22c)
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
2 valid minerals.
Detailed Mineral List:
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Magnetite Formula: Fe2+Fe3+2O4 |
| ⓘ 'Tetrahedrite Subgroup' Formula: Cu6(Cu4C2+2)Sb4S12S |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | 'Tetrahedrite Subgroup' | 2.GB.05 | Cu6(Cu4C2+2)Sb4S12S |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Magnetite | Fe2+Fe23+O4 |
| S | Sulfur | |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Tetrahedrite Subgroup | Cu6(Cu4C22+)Sb4S12S |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Cu | ⓘ Tetrahedrite Subgroup | Cu6(Cu4C22+)Sb4S12S |
| Sb | Antimony | |
| Sb | ⓘ Tetrahedrite Subgroup | Cu6(Cu4C22+)Sb4S12S |
Other Databases
| Link to USGS - Alaska: | WI079 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Brooks RangeMountain Range
- Rocky MountainsMountain Range
North America PlateTectonic Plate
- Brooks Range DomainVolcanic Arc
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