North Currant Creek Occurrence, Bristol Bay District, Lake and Peninsula Borough, Alaska, USA
General area of interest is highly iron-stained with hematite and oxidized pyrite. Site is in Lake Clark National Park and Preserve.
Location: Locality is about 4 km northeast of the mouth of Currant Creek and includes the unnamed tributaries of Currant Creek. This is locality 26 of Nelson and others (1985) and locality 28 of MacKevett and Holloway (1977). Sec. 26, T. 3 N., R. 27 W., of the Seward Meridian. Accurate to within 1,600 meters, the occurence may extend up to 2.5 km downstream from the plotted point.
Geology: Mineralization is in form of disseminations and fracture fillings of pyrite and chalcopyrite in strongly iron-stained intermediate volcanics and in the neighboring hypabyssal granitic to granodioritic intrusives near contact of Tertiary granitic rocks and Tertiary volcanic rocks. Interpreted by Resource Associates of Alaska (1976) as a volcanic neck or breccia pipe, composed of highly fractured, silicified, and recrystallized volcanic rocks. Resource Associates of Alaska (1976) reported a nearby stream sediment sample with value of 1,200 ppm Cu.
Workings: Resource Associates of Alaska (1976) reported a stream sediment sample with value of 1,200 ppm Cu.
Age: Tertiary or younger.
Alteration: Volcanic rocks are silicified, recrystallized, and iron-stained.
Production: No production
Reserves: No reserves
Commodities (Major) - Cu
Development Status: None
Deposit Model: Porphyry Cu ? (Cox and Singer, 1986; model 17 ?)
ReferencesCobb, E.H., and Reed, B.L., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in the Iliamna, Lake Clark, Lime Hills, and McGrath quadrangles, Alaska; Supplement to Open-File Report 76-485; Part A, Summaries to January 1, 1981: U.S. Geological Survey Open-File Report 81-1343-A, 25 p. Cobb, E.H., and Reed, B.L., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in the Iliamna, Lake Clark, Lime Hills, and McGrath quadrangles, Alaska; Supplement to Open-File Report 76-485; Part B, Lists of references to Januray 1, 1981: U.S. Geological Survey Open-File Report 81-1343-B, 20 p. MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous mineral deposits in the western part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-F, 38 p., 1 sheet, scale 1:1,000,000. Nelson, W.H., King, H.D., Case, J.E., Tripp, R.B., Crim, W.D., and Cooley, E.F., 1985, Mineral resource map of the Lake Clark quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1114-B, 1 sheet, scale 1:250,000. Resource Associates of Alaska, Inc., 1976, Geology and geochemistry of certain land within the Lake Clark National Park: Contract report for U.S. Bureau of Mines, Contract JO166108, 7 v.
| Chalcopyrite|| Hematite|| Pyrite|
3 entries listed. 3 valid minerals.
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New Locality Added: Pegmatite Locality 10, Frøyså, Iveland, Aust-Agder, NorwayFrom Olav Revheim, 21st Dec 2014 14:27:42