Main commodities | Cu |
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Ore minerals | bornite; chalcopyrite; pyrite |
Gangue minerals | quartz |
Quadrangle map, 1:250,000-scale | NB |
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Quadrangle map, 1:63,360-scale | B-3 |
Latitude | 62.4242 |
Longitude | -142.3138 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | This occurrence is north of upper Antler Creek; it is at an elevation of about 6,700 feet, about 500 feet south-southwest of peak 7144. The site is in the SE1/4 of section 32, T. 8 N., R. 17 E. of the Copper River Meridian. This is locality 36 of Richter and others (1975). It is located to within about 100 feet. |
Geologic descriptionThis occurrence consists of quartz veinlets with minor chalcopyrite, pyrite, and bornite; the veinlets cut hornblende syenodiorite of the Antler Creek pluton (Richter, 1975; Richter and others, 1975). The Antler Creek pluton is part of a mid-Cretaceous intrusive suite associated with copper skarn and porphyry deposits elsewhere in the Nabesna quadrangle (e.g.. NB022 and NB043). A K/Ar date on hornblendite in the border zone of the Antler Creek pluton is 105 +/- 2.8 Ma (Richter, 1975; Richter, Lanphere, and Matson, 1975). | |
Geologic map unit | (-142.315938730801, 62.4238521899028) |
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Mineral deposit model | Copper-bearing vein |
Age of mineralization | Mid-Cretaceous. A K/Ar date for the Antler Creek pluton is 105 +/- 2.8 Ma (Richter, Lanphere, and Matson, 1975). |
Alteration of deposit | Oxidation? Richter (1975) reports that copper staining is commonly present at mineralized occurrences in this area. |
Workings or exploration | Probably only surface examination. |
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Indication of production | None |
Additional commentsThe occurrence is in the Wrangell-St. Elias National Preserve. |
MRDS Number | A011409 |
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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.
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Reporters | Travis L. Hudson (Applied Geology) |
Last report date | 11/24/2002 |