Quadrangle map, 1:250,000-scale | TK |
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Quadrangle map, 1:63,360-scale | D-2 |
Latitude | 62.9472 |
Longitude | -147.7985 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | This occurrence is at an elevation of about 3,700 feet on the northwest side of upper Watana Creek. It is approximately 1.5 miles southeast of VABM Watana, in the NE1/4SE1/4 sec. 18, T. 33 N., R. 9 E., Seward Meridian. The location is accurate to within 1/4 mile. |
Geologic descriptionThis occurrence is a small gossan zone at the contact of maroon amygdaloidal basalt and overlying, buff-weathering dolomitic limestone. Upper Triassic fossils occur in the limestone, 1,000 feet north of the gossan (Csejtey and others, 1978; J. Schmidt, written communication, 2001). A U.S. Geological Survey sample contains 3.3 parts per million gold, 1.0 part per million silver, 293 parts per million copper, and 115 parts per million antimony. (The 3.3-ppm gold value is from an ICP analysis by XRAL Laboratories; a fire assay on the sample gives 0.024 ppm gold. The cause of this discrepancy is not known.) | |
Geologic map unit | (-147.800748191828, 62.9467444807773) |
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Mineral deposit model | Basaltic copper? (Cox and Singer, 1986; model 23?) |
Mineral deposit model number | 23? |
Alteration of deposit | The basalt is oxidized. |
Workings or exploration | Only surface sampling by U.S. Geological Survey (J. Schmidt, written communication, 2001). |
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Indication of production | None |
References | |
Reporters | R.K. Rogers (U. S. Geological Survey contractor) |
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Last report date | 10/4/2002 |