Main commodities | Cu |
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Ore minerals | azurite; bornite; chalcocite; chalcopyrite; covellite; native copper |
Gangue minerals | epidote; quartz; siderite |
Quadrangle map, 1:250,000-scale | HE |
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Quadrangle map, 1:63,360-scale | A-1 |
Latitude | 63.09 |
Longitude | -147.36 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | This occurrence is at an elevation of about 4,800 feet on a ridge about 2.2 miles south of lower Windy Creek. The site is in the SE1/4 of sec. 16, T. 21 S., R. 2 E., of the Fairbanks Meridian. |
Geologic descriptionThe general area of this occurrence is underlain by the Middle or Upper Triassic Nikolai Greenstone, which consists of massive, subaerial and submarine basalt flows and minor interbedded volcaniclastic sedimentary rocks, aquagene and epiclastic tuff, breccia, argillite, and radiolarian chert (Nokleberg and others, 1992). The occurrence is in greenstone and consists of a small, hydrothermally altered shear zone containing epidote, copper sulfide minerals, and possibly native copper and an iron carbonate mineral. Weathering locally produces malachite and azurite-coated float and encrustations. | |
Geologic map unit | (-147.362253950936, 63.0895510143279) |
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Mineral deposit model | Hydrothermally altered shear zone. |
Age of mineralization | Triassic or younger. |
Alteration of deposit | Propylitic alteration of greenstone. |
Workings or exploration | Surface chip sampling only. |
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Indication of production | None |
MRDS Number | A011360 |
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ReferencesGlavinovich, P.S., 1967, Trace element copper distribution and areal geology in a portion of the Clearwater Mountains, Alaska: University of Alaska, Minerals Industry Research Laboratory, Report No. 10, 55 p.
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Reporters | D.L. Stevens (Stevens Exploration Management Corporation) |
Last report date | 4/7/2000 |