Nateekin River Occurrence, Aleutians Mining District, Aleutians West Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Nateekin River Occurrence | Occurrence |
| Aleutians Mining District | Mining District |
| Aleutians West Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
53° 51' 0'' North , 166° 52' 58'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Dutch Harbor | 4,376 (2018) | 22.8km |
| Unalaska | 4,491 (2017) | 22.8km |
Localization of sulfides and silicification, the gold and silver anomalies, and the local geologic context suggests epithermal mineralization might warrant consideration.
Location: North side of Nateekin River about 5 miles (8 km) upstream from Nateekin Bay. Anomaly no. 18 of Christie (1974).
Geology: A pale yellow-brown to medium red-brown color anomaly 3,000 ft (900 m) in diameter in pyroclastic rocks and volcanic flows (andesite to dacite) of Unalaska Formation (see Drewes and others, 1961). The rocks contain disseminated and locally mineralized fracture concentrated sulfides and are cut by post-mineralization augite andesite dikes. Christie (1974) indicated that there is no evidence that this sulfide system is related to an intrusive body because exposure is sufficiently good to rule out the existence of one. No copper was observed (the goal of Christie's examination efforts).
Workings: Limited reconnaissance mapping and 3 soil(?) samples. Samples contained up to 1.8 ppm silver, one contained 0.01 ppm gold and 9 ppm molybdenum.
Age: Cenozoic
Alteration: Propylitic to argillic - local silicification. Leaching is locally complete.
Commodities (Major) - Au(?), Ag
Development Status: No
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
1 valid mineral.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
Other Databases
| Link to USGS - Alaska: | UN018 |
|---|
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