Eli River; Agashashok River Occurrence, Noatak Mining District, Northwest Arctic Borough, Alaska, USAi
Regional Level Types | |
---|---|
Eli River; Agashashok River Occurrence | Occurrence |
Noatak Mining District | Mining District |
Northwest Arctic Borough | Borough |
Alaska | State |
USA | Country |
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Latitude & Longitude (WGS84):
67° 38' 24'' North , 161° 25' 47'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Mindat Locality ID:
197374
Long-form identifier:
mindat:1:2:197374:0
GUID (UUID V4):
815969ef-dc3e-4ecc-aacc-c08e1f927472
Location: This occurrence is at an elevation of about 2,200 feet, approximately 1.7 miles north of the headwaters of the Agashashok River. It is in section 20, T. 26 N., R. 12 W., of the Kateel River Meridian. Cobb (1972, MF-386), location 1, and Schmidt and Allegro (1988), location 72.
Geology: The bedrock in this area is Devonian Skajit limestone, dolomite, marble, and minor gray phyllite (Schmidt and Allegro, 1988). The carbonates are cut by small quartz stringers containing small amounts of sulfides. A large quartz boulder contained small blebs of chalcopyrite, along with minor malachite. The quartz assayed 0.48% Cu. Other rock samples collected in the area returned no significant metal values (Degenhart and others, 1978). A quartz sample containing pyrite collected by the U.S. Geological Survey contained 100 ppm As, 4 ppm Sb, 3 ppm Ag, 3000 ppm Cu, 200 ppm La, 300 ppm Ni, and 30 ppm Pb (Schmidt and Allegro, 1988).
Workings: Six stream silt samples and one rock sample were collected during a U.S. Bureau of Mines investigation of the area in 1978 (Degenhart and others, 1978). The U.S. Geological Survey also visited and sampled the occurrence (Schmidt and Allegro, 1988).
Age: Devonian?
Commodities (Major) - Cu
Development Status: None
Deposit Model: Sulfide-bearing quartz veins cutting 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
3 valid minerals.
Detailed Mineral List:
ⓘ Chalcopyrite Formula: CuFeS2 |
ⓘ 'Limonite' |
ⓘ Malachite Formula: Cu2(CO3)(OH)2 |
ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
Group 4 - Oxides and Hydroxides | |||
ⓘ | Quartz | 4.DA.05 | SiO2 |
Group 5 - Nitrates and Carbonates | |||
ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
Unclassified | |||
ⓘ | 'Limonite' | - |
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 |
S | Sulfur | |
S | ⓘ Chalcopyrite | CuFeS2 |
Fe | Iron | |
Fe | ⓘ Chalcopyrite | CuFeS2 |
Cu | Copper | |
Cu | ⓘ Chalcopyrite | CuFeS2 |
Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
Other Databases
Link to USGS - Alaska: | BM016 |
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Other Regions, Features and Areas containing this locality
North America
- Brooks RangeMountain Range
- Rocky MountainsMountain Range
North America PlateTectonic Plate
- Brooks Range DomainDomain
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