Unnamed Occurrence (ARDF - TA009; ridge west of Stevens Creek), Aniak District, Dillingham Borough, Alaska, USA
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Geology: The core of the Taylor Mountains is an Upper Cretaceous or LowerTertiary granite pluton that sharply crosscuts and thermally metamorphoses mid-Cretaceous clastic sedimentary rocks of the Kuskokwim Group (Cady and others, 1955, p. 83, 121). Quartz veins are common in the pluton near its border and in the contact-metamorphic rocks. Wolframite was identified in vein quartz float that apparently weathered from the contact-metamorphic zone on the ridge west of Stevens Creek.
Age: Late Cretaceous or Early Tertiary, the age of the Taylor Mountain pluton.
Alteration: Hornfels is developed in the country rocks adjacent to the Taylor Mountain pluton. Quartz veining is common in the border of the pluton and in the hornfels.
Commodities (Major) - W
Development Status: None
Deposit Model: Wolframite in quartz veins
2 entries listed. 1 valid mineral.
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Cady, W.M., Wallace, R.E., Hoare, J.M., and Webber, E.J., 1955, The central Kuskokwim region, Alaska: U.S. Geological Survey Professional Paper 268, 132 p. Cobb, E.H., 1972, Metallic mineral resources map of the Taylor Mountains quadrangle: U.S. Geological Survey Miscellaneous Field Studies Map MF-384, 1 sheet, scale 1:250,000. Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Dillingham, Sleetmute, and Taylor Mountains quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-606, 92 p.