Main commodities | Cu |
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Other commodities | Au; Mo |
Ore minerals | chalcopyrite; molybdenite |
Gangue minerals | quartz |
Quadrangle map, 1:250,000-scale | GU |
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Quadrangle map, 1:63,360-scale | D-1 |
Latitude | 62.9 |
Longitude | -144.08 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | The prospect is at an elevation of about 5,000 feet in a major west-flowing tributary to upper Granite Creek . It is listed as an unnamed prospect by Cobb (1979 [OF 79-1247]). The prospect is near the creek and approximately on the boundary between sections 15 and 16, T. 13 N., R. 7 E., Copper River Meridian. It was listed as locality 9 by both Richter and Matson (1972) and MacKevett and Holloway (1977). |
Geologic descriptionThe prospect is one of several in or near the western contact zone of a Jurassic diorite to quartz-diorite batholith (Richter and Matsen, 1968; Richter, Lanphere, and Matson, 1975). Stream sediments collected from this zone (area 1, WGM Inc., 1980) were moderately anomalous in gold over a distance of about fifteen miles. According to Kirk Stanley (written communication 2000), chalcopyrite and molybdenite commonly occur along joint surfaces in silica-carbonate rock, which is widely developed near the western contact of the Jurassic pluton. No specific information is known about the prospect. | |
Geologic map unit | (-144.082209163507, 62.899612065383) |
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Mineral deposit model | Porphyry Cu-Mo? (Cox and Singer, 1986; model 21a?). |
Mineral deposit model number | 21a? |
Age of mineralization | Probably coeval with a Jurassic diorite to quartz-diorite complex. |
Workings or exploration | The prospect was briefly described to Richter in 1969 by Kirk Stanley. It is probably in or near upper Granite Creek as described by Stanley in a letter to Ahtna Minerals Corporation (written communication, 2000). |
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Indication of production | None |
Additional commentsAdditional information can be obtained from Ahtna Minerals in Anchorage, Alaska. |
MRDS Number | A011849 |
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ReferencesRichter, D.H., Lanphere, M.A., and Matson, N.A., Jr., 1975, Granite plutonism and metamorphism, eeastern Alaska Range, Alaska: Geological Society of American Bulletin, v. 86, p. 819-820.
WGM Inc., 1980, 1979 Summary report of gold potential, Slana District, Ahtna project: WGM Inc., 10 p., map, scale 1:63,360. (Report held by Ahtna Mineral Co., Anchorage, Alaska).
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Reporters | W.T. Ellis (Alaska Earth Sciences), C.C. Hawley (Hawley Resource Group), and W.J. Nokleberg (U.S. Geological Survey) |
Last report date | 12/6/2000 |