Quadrangle map, 1:250,000-scale | MH |
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Quadrangle map, 1:63,360-scale | B-4 |
Latitude | 63.3325 |
Longitude | -145.7299 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | This occurrence is at an elevation of 2,650 feet just east of the Richardson Highway approximately 2.5 miles south of Millers Roadhouse. It is in the NE1/4NE1/4 section 25, T. 18 S., R. 10 E., Fairbanks Meridian. The occurrence is described by Hanson (1963, locality 3), and it corresponds to locality 18 in Cobb (1979 [OFR 79-238]) and locality S103 in table 2 of Nokelberg and others (1991). |
Geologic descriptionThis occurrence consists of discontinuous and irregular quartz veins as much as 6 inches thick that contain disseminated chalcopyrite, galena, and pyrite (Hanson, 1963). Some of the chalcopyrite is oxidized to azurite and malachite. The veins cut metadacite of the Slana Spur Formation of Pennsylvanian age (Nokleberg and others, 1991). A grab sample of a three-quarter-inch quartz vein with chalcopyrite, malachite, and azurite contained 5,600 parts per million (ppm) copper, 180 ppm lead, 4,200 ppm zinc, 10 ppm silver, and 5,000 ppm arsenic (Nokleberg and others, 1991). Samples of the mineralized quartz veins assayed 0.4 to 0.5 percent copper, 0.4 to 0.5 percent lead, and a trace of gold (Hanson, 1963). | |
Geologic map unit | (-145.732155087061, 63.3320868871175) |
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Mineral deposit model | Polymetallic veins (Cox and Singer, 1986; model 22c). |
Mineral deposit model number | 22c |
Age of mineralization | Pennsylvanian or younger. |
Workings or exploration | A grab sample of a three-quarter-inch quartz vein with chalcopyrite, malachite, and azurite contained 5,600 parts per million (ppm) copper, 180 ppm lead, 4,200 ppm zinc, 10 ppm silver, and 5,000 ppm arsenic (Nokleberg and others, 1991). Samples of the mineralized quartz veins assayed 0.4 to 0.5 percent copper, 0.4 to 0.5 percent lead, and a trace of gold (Hanson, 1963). |
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Indication of production | None |
MRDS Number | A011797 |
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References | |
Reporters | W.T. Ellis (Alaska Earth Science), C.C. Hawley (Hawley Resource Group), and W.J. Nokleberg (USGS) |
Last report date | 8/9/2002 |