Main commodities | Ag; Cu |
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Ore minerals | chalcopyrite |
Gangue minerals | quartz |
Quadrangle map, 1:250,000-scale | SK |
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Quadrangle map, 1:63,360-scale | B-2 |
Latitude | 59.3 |
Longitude | -135.68 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | This occurrence is at an elevation of about 1,500 feet, 1.7 miles west of the summit of Tukgahgo Mountain. It is in the south-central part of section 5, T. 30 S., R. 57 E. of the Copper River Meridian. It is shown as mineral occurrence 7 on sheet 1 of Redman and others (1984) and as number S048 by Wells and others (1986). |
Geologic descriptionRedman and others (1984) describe this occurrence as a series of chalcopyrite-bearing quartz veins that cut a diorite dike in metabasalt. The veins are 1 to 10 inches thick and at least 35 feet long. A representative sample contained 520 ppm copper and 0.3 ppm silver. The diorite dike is probably the same age as the nearby mid-Cretaceous, Mount Kashagnak pluton. | |
Geologic map unit | (-135.681834499125, 59.2996719256207) |
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Mineral deposit model | Quartz sulfide veins (Cox and Singer, 1986; model 22c or 36a). |
Mineral deposit model number | 22c or 36a |
Age of mineralization | Mid-Cretaceous or younger based on the age of the dike cut by the veins (Redman and others, 1984). |
Indication of production | None |
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MRDS Number | A013104 |
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References | |
Reporters | T.C. Crafford (T. Crafford & Associates, Anchorage) |
Last report date | 2/4/2001 |