Unnamed Occurrence (ARDF - WI087; north of Mathews Dome), Koyukuk Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - WI087; north 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° 28' 7'' North , 151° 23' 34'' West
Latitude & Longitude (decimal):
Köppen climate type:
See also Mathews Dome (WI086).
Location: This occurrence is about 0.6 mile north of the summit of Mathews Dome. It is at an elevation of about 4,000 feet near the southwest corner of section 25, T. 31 N., R. 18 W., of the Fairbanks Meridian. The location is accurate.
Geology: This occurrence consists of traces of malachite in quartz veins and schist (Chipp, 1972). Selected grab sample of schist contain 2.1% copper and 14.0 ppm silver. A sample of vein quartz contained no anomalous values. (Samples 501 and 502 of Dillon and others (1981 [AOF 133B]) are the same as samples 136 and 137 of Chipp (1972) that are cited above.). The rocks in the area are Devonian phyllite, schist, and subordinate limestone or dolomite (Chipp, 1972).
Workings: Only surface sampling.
Alteration: Oxidation of copper mineral.
Commodities (Major) - Ag, Cu
Development Status: None
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.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| C | Carbon | |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| Cu | Copper | |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
Other Databases
| Link to USGS - Alaska: | WI087 |
|---|
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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