Unnamed Occurrence (ARDF - TA009; ridge west of Stevens Creek), Aniak District, Dillingham Borough, Alaska, USA

Location: Stevens Creek flows northeast from headwaters in the highest part of the Taylor Mountains. This occurrence is on the ridge on the west side of Stevens Creek. The map site is at an elevation of 2,400 feet, in the SE1/4 of section 13, T 10 N, R 46 W, of the Seward Meridian. It is approximately located, perhaps within 1 mile. This occurrence is locality 7 of Cobb (1972 [MF 384]; 1976 [OF 76-606]).
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

References:
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.