The site is in Tongass National Forest and appears to be open for mineral location.The occurrence is low-grade, but of possible interest as a possible volcanogenic occurrence in layered metavolcanic rocks.
Location: Occurrence is 1.5 miles southwest of Mt. Wade on the Alaska border. The occurrence is at an elevation of about 5500 feet about 0.1 mile northeast of the summit of hill 5790 (section 17, T. 24 S., R. 40 E., of the Copper River meridian). The location is probably accurate within 0.25 mile.
Geology: The occurrence consists of sulfide-bearing amphibolite in a foliated series of mica schist, metavolcanics, and marble of Paleozoic age (MacKevett and Plafker, 1970). The amphibolite contained 0.15 percent zinc, 500 ppm copper, and weakly anomalous amounts of cobalt, nickel, titanium, and vanadium.
Workings: Surface exposures only. MacKevett and Plafker (1970, table 1) reported 500 ppm copper and 1500 ppm zinc in sulfide-bearing amphibolite.
Commodities (Major) - Cu, Zn
Development Status: None
Deposit Model: Mineralized mafic extrusive ?, Volcanogenic ?
References:
MacKevett, E.M., Jr., and Plafker, G., 1970, Geochemical and geophysical reconnaissance of parts of the Yakutat and Mount St. Elias quadrangles, Alaska: U.S. Geological Survey Bulletin 1312-L, p. L1-L12 p.
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Map Reference: 59°47'52"N , 138°42'21"W
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Mineral List:No entries listed.
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