Unnamed Occurrence (ARDF - WI085; south of Mathews Dome), Koyukuk Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - WI085; south of Mathews Dome) | - 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° 26' 37'' North , 151° 28' 40'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This occurrence is located about 1.5 miles south of Mathews Dome. It is at near a prominent peak an elevation of about 4,000 feet in the NW1/4 section 12, T. 30 N., R. 18 W., of the Fairbanks Meridian. The location is accurate.
Geology: This occurrence consists of replacement layers or veins of sphalerite and pyrite up to 8 cm thick in an orange-weathering dolomite layer in gray marble (Dillon and others, 1981 [AOF 133B]. A grab sample of the mineralized rock contains 0.40 ppm gold, 2.2 ppm silver, 200 ppm lead, and 10.3% zinc. High values of Mg and Mn were also noted.
Workings: Only surface sampling.
Commodities (Major) - Ag, Au, Zn; (Minor) - Pb
Development Status: None
Deposit Model: Polymetallic replacement deposit(?) (Cox and Singer, 1986; model 19a)
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:
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Sphalerite Formula: ZnS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
List of minerals for each chemical element
| S | Sulfur | |
|---|---|---|
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Sphalerite | ZnS |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
Other Databases
| Link to USGS - Alaska: | WI085 |
|---|
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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