Eskimo Occurrence, Noatak Mining District, Northwest Arctic Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Eskimo Occurrence | Occurrence |
| Noatak Mining District | Mining District |
| Northwest Arctic Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
67° 30' 36'' North , 161° 40' 48'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Located within the Noatak National Preserve.
Location: This occurrence is at an elevation of about 7 miles southeast of the headwaters of Agashashok River. It is in section 12, T.24 N., R. 14 W., of the Kateel River Meridian. Location is accurate to within 3,000 feet. Grybeck (1977), location 2, Schmidt and Allegro (1988), location 72.
Geology: The bedrock in this area is mapped as Devonian Skajit limestone, dolomite and marble with gray phyllite (Schmidt and Allegro, 1988). This occurrence consists of chalcocite and malachite in bleached limestone. The bedrock is cut by small quartz stringers.
Workings: Twenty-five claims were staked in the area in 1966. There was renewed activity in the area in the 1990's by local prospectors who have been mapping and sampling the area (Roy Barr, personal communication, 1997).
Age: Devonian?
Alteration: Bleaching of limestone.
Commodities (Major) - Cu
Development Status: None
Deposit Model: Sulfide-bearing quartz stringers in Paleozoic limestone.
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:
| ⓘ Chalcocite Formula: Cu2S |
| ⓘ Malachite Formula: Cu2(CO3)(OH)2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcocite | 2.BA.05 | Cu2S |
| 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 |
| S | Sulfur | |
| S | ⓘ Chalcocite | Cu2S |
| Cu | Copper | |
| Cu | ⓘ Chalcocite | Cu2S |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
Other Databases
| Link to USGS - Alaska: | BM013 |
|---|
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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