Occurrence, Inactive
Quadrangle map, 1:250,000-scale | MH |
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Quadrangle map, 1:63,360-scale | B-4 |
Latitude | 63.2878 |
Longitude | -145.618 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | This occurrence at an elevation of 6,200 feet is near the crest of Rainbow Ridge 1.5 miles south-southeast of the top of Rainbow Ridge. It is in the NE1/4NW1/4 section 10, T. 19 S., R. 11 E., Fairbanks Meridian. The occurrence is described by Hanson (1963, locality 7). It corresponds to locality 22 in Cobb (1979 [OFR 79-238]) and locality S112 in table 2 of Nokelberg and others (1991). |
Geologic descriptionThis occurrence consists of chalcopyrite, galena, and pyrite in vertical quartz veins as much as 8 feet wide that strike north-south and cut a Permian dacite intrusive (Hanson, 1963; Nokleberg and others, 1991). The dacite intrudes the Tetelna Volcanics of Permian age. A sample of mineralized vein contained 4,000 parts per million (ppm) copper, 6,000 ppm lead, and a trace each of silver and gold (Nokleberg and others, 1991). | |
Geologic map unit | (-145.620246986537, 63.2873878093325) |
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Mineral deposit model | Porphyry Cu (Cox and Singer, 1986; model 17). |
Mineral deposit model number | 17 |
Age of mineralization | Permian or younger. |
Workings or exploration | A sample of mineralized vein contained 4,000 parts per million (ppm) copper, 6,000 ppm lead, and a trace each of silver and gold (Nokleberg and others, 1991). |
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Indication of production | None |
References | |
Reporters | W.T. Ellis (Alaska Earth Science), C.C. Hawley (Hawley Resource Group), and W.J. Nokleberg (USGS) |
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Last report date | 8/9/2002 |