Unnamed Occurrence (ARDF - SP014; west of Awlinyak Creek), Koyukuk Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - SP014; west of Awlinyak 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° 29' 20'' North , 154° 27' 10'' West
Latitude & Longitude (decimal):
Köppen climate type:
Located within Gates of the Arctic National Park.
Location: This site is at an elevation of about 4300 feet near the headwaters of an unnamed creek 3 miles west of Awlinyak Creek. It is in the SE1/4 of sec. 8, T. 24 N., R. 20 E., of the Kateel River Meridian. Accuracy of the location is within 1000 ft. The site corresponds to locality 31 of Grybeck and Nelson (1981).
Geology: This occurrence consists of locally prominent copper staining in several cliffs near the contact of Devonian gneissic granite with Paleozoic chlorite schist and quartzite (Grybeck and Nelson, 1981). Grab samples that had visible fluorite and chlorite contained up to 3 ppm Ag, 300 ppm Bi, and 100 ppm Sn. A brief examination suggests that the occurrences are erratic and small. They probably are similar in origin to other Devonian contact-metamorphic deposits in nearby areas of the Brooks Range (Newberry and others, 1986).
Workings: Site examined during regional geologic mapping by the USGS in the late 1970s.
Age: Devonian; related to the intrusion of Devonian pluton.
Commodities (Major) - Ag, Bi, Cu, Sn; (Minor) - F
Development Status: None
Deposit Model: Skarn (Cox and Singer, 1986; model 14b)
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
3 valid minerals.
Detailed Mineral List:
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Fluorite Formula: CaF2 |
| ⓘ Malachite Formula: Cu2(CO3)(OH)2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| Group 3 - Halides | |||
| ⓘ | Fluorite | 3.AB.25 | CaF2 |
| 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 |
| F | Fluorine | |
| F | ⓘ Fluorite | CaF2 |
| S | Sulfur | |
| S | ⓘ Chalcopyrite | CuFeS2 |
| Ca | Calcium | |
| Ca | ⓘ Fluorite | CaF2 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
Other Databases
| Link to USGS - Alaska: | SP014 |
|---|
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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