Mt. Aspid Occurrence, Aleutians Mining District, Aleutians West Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Mt. Aspid 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° 25' North , 167° 24' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Mindat Locality ID:
199026
Long-form identifier:
mindat:1:2:199026:6
GUID (UUID V4):
5dea5692-ad85-4b28-a6cf-194e3000f106
Location: East of Chernofski in cirque on Mt. Aspid. Anomaly no. 47 of Christie (1974).
Geology: A 3,000 ft by 3,000 ft (900 m by 900 m) color anomaly is developed in hornfelsed volcanic rocks intruded by a quartz-eye porphyry and hornblende quartz diorite. Mineralization is apparently related to the quartz-eye porphyry (+/- plagioclase phenocrysts) and consists of pyrite and trace amounts of chalcopyrite. Fracture-controlled sulfides are generally weakly developed and related to local silicification and/or fracture-controlled sericite. Minor quartz veining occurs. Christie (1974) reported a covered area about 600 ft by 1,000 ft (180 m by 305 m) exists persumably within the color anomaly area, suggesting a target might lie underneath. However, he also stated that fringing outcrops around this covered area were not well mineralized. Fracturing is generally weak.
Workings: Brief reconnaissance mapping and 6 soil or silt samples. Zinc and silver were low, however samples yielded gold to as high as 0.04 ppm (detection limit 0.01 ppm) and copper as high as 330 ppm.
Age: Miocene or younger
Alteration: Local quartz sericitic, potassic, and argillic. Leaching is weak.
Commodities (Major) - Cu, Mo, Au
Development Status: No
Deposit Model: Copper porphyry, epithermal gold vein
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:
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Pyrite Formula: FeS2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
List of minerals for each chemical element
| S | Sulfur | |
|---|---|---|
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
Other Databases
| Link to USGS - Alaska: | UN031 |
|---|
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References
