Quadrangle map, 1:250,000-scale | NB |
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Quadrangle map, 1:63,360-scale | A-1 |
Latitude | 62.073 |
Longitude | -141.0725 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | This occurrence is on the east nose of the ridge between lower Baultoff Creek and Gravel Creek. It is near elevation 4119 near the southeast corner of SE1/4 of section 31, T. 4 N., R. 24 E. of the Copper River Meridian. This is locality 9 of Richter and others (1973), locality 56 of Richter and others (1975), and National Park Service locality WRST-82 (unpublished data). Cobb and Richter (1980) included this locality as an 'Unnamed occurrence'. It is located to within a few hundred feet. |
Geologic descriptionAt this occurrence, quartz veins with calcite and minor chalcopyrite cut a small quartz monzonite stock and its volcanic country rocks (Matson and Richter, 1971 [OFR 71-202]; Richter and others, 1975). A grab sample of a quartz-calcite vein contained 7 parts per million (ppm) silver, 15,000 ppm copper, 700 ppm chromium, 150 ppm nickel, 200 ppm zinc, and 300 ppm vanadium (Matson and Richter, 1971 [OFR 71-202]). The diorite stock intrudes upper Paleozoic volcanic rocks and is inferred to be Cretaceous (Richter and others, 1973). | |
Geologic map unit | (-141.074630791621, 62.0726794511692) |
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Mineral deposit model | Quartz-calcite veins with chalcopyrite |
Age of mineralization | Cretaceous or Tertiary; the diorite stock that hosts the deposit is inferred to be Cretaceous (Richter and others, 1973). |
Indication of production | None |
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Additional commentsThe occurrence is in the Wrangell-St. Elias National Preserve. |
MRDS Number | A011426 |
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References | |
Reporters | Travis L. Hudson (Applied Geology) |
Last report date | 11/24/2002 |