|Quadrangle map, 1:250,000-scale||TK|
|Quadrangle map, 1:63,360-scale||C-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at an elevation of about 3,800 feet at the head of Ocher Creek, an informal name. It is 1.2 miles southwest of VABM Jaina and 2.5 miles northeast of the Talkeetna River, near the center of the E1/2 sec. 24, T. 28 N., R. 4 E., Seward Meridian. The location is accurate to within 1/4 mile. This is locality 48 of Csejtey and Miller (1978).|
Geologic descriptionThis prospect consists of pyrite, chalcopyrite, and malachite in Triassic(?) greenstone interlayered with phyllite and argillite (Anderson, 1969). In places the phyllite is pyritic and gossanous, with botryoidal crusts of limonite and local brown boxworks formed by the leaching of sulfides. Sulfide-bearing quartz samples contain up to 3 parts per million silver, 0.22 part per million gold, and 750 parts per million copper.
|Geologic map unit||(-148.52101796416, 62.5285231429842)|
|Mineral deposit model||Basaltic Cu? (Cox and Singer, 1986; model 23?)|
|Mineral deposit model number||23?|
|Alteration of deposit||Iron and copper staining.|
|Workings or exploration||Only limited surface sampling (Anderson, 1969).|
|Indication of production||None|
Anderson, R.E., 1969, Preliminary geochemistry and geology, Little Falls Creek area, Talkeetna Mts. Quadrangle, Alaska: Alaska Division of Mines and Geology Geochemical Report 19, 16 p., 1 sheet, scale 1:42,240.
Cobb, E.H., and Csejtey, Bela, Jr., 1980, Summaries of data on and lists of references to metallic and selected nonmetallic mineral deposits in the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-716, 63 p.
Csejtey, Bela, Jr., and Miller, R.J., 1978, Map and table describing metalliferous and selected nonmetalliferous mineral deposits in the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-558-B, 22 p., 1 sheet, scale 1:250,000.
Csejtey, Bela, Jr., Nelson, W.H., Jones, D.L., Silberling, N.J., Dean, R.M., Morris, M.S., Lanphere, M.A., Smith, J.G., and Silberman, M.L, 1978, Reconnaissance geologic map and geochronology, Talkeetna Mountains quadrangle, northern part of Anchorage quadrangle, and southwest part of Healy quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-558-A, 60 p., 1 sheet, scale 1:250,000.
MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.
|Reporters||R.K. Rogers (U. S. Geological Survey contractor)|
|Last report date||10/1/2002|