Unnamed Occurrence (ARDF - SI150; south of Sealion Cove), Chichagof Mining District (Chicagof Mining District), Sitka, Alaska, USAi
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Latitude & Longitude (WGS84):
57° 17' 6'' North , 135° 50' 5'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This occurrence is at an elevation of about 100 feet in an unnamed cove about 0.4 mile south of the head of Sealion Cove on northwest Kruzof Island. The occurrence is 0.3 mile southwest of the center of sec. 11, T. 53 S., R. 60 E. It is location P-105 of Bittenbender and others (1999), location 49 of Cobb (1972, 1978), and MAS no. 0021140076 (U.S. Bureau of Land Management, 2002). The location is accurate within 0.5 mile.
Geology: Loney and others (1975) map the rocks in the area of this occurrence as Jurassic and Cretaceous graywacke that is intruded by a stock of Tertiary (Eocene) granodiorite. The graywacke is widely metamorphosed by the intrusion to hornfels and schist. Cobb (1972, 1978), citing Loney and others (1963), describes the occurrence as molybdenite and chalcopyrite in quartz veins in biotite hornfels associated with pegmatite dikes. Bittenbender and others (1999) describe the occurrence as a porphyry molybdenum-copper deposit; samples contained up to 2,450 parts per billion gold, 21 parts per million (ppm) molybdenum, 110 ppm copper, and more than 1 percent arsenic.
Workings: Only surface sampling.
Commodities (Major) - Au, Cu, Mo; (Minor) - As
Development Status: None
Deposit Model: Polymetallic veins and/or porphyry Mo-Cu deposit (Cox and Singer, 1986; models
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 |
| ⓘ Molybdenite Formula: MoS2 |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Molybdenite | 2.EA.30 | MoS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Molybdenite | MoS2 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Mo | Molybdenum | |
| Mo | ⓘ Molybdenite | MoS2 |
Other Databases
| Link to USGS - Alaska: | SI150 |
|---|
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