|Quadrangle map, 1:250,000-scale||TC|
|Quadrangle map, 1:63,360-scale||C-1|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The Pushbush prospect is located in the SE 1/4 section 11, T. 20 N., R. 21 E., of the Copper River Meridian. It is location 11 of Singer and others (1976), and location 13 of Eberlein and others (1977). It is just north of the Big Creek prospect (TC004). The location is accurate to within 1 mile.|
Geologic descriptionThe Pushbush prospect consists of disseminated pyrite, chalcopyrite, and molybdenite in Tertiary mafic and felsic volcanic rocks, biotite gneiss, and schist. The schist is likely Paleozoic and/or Precambrian in age, and has undergone amphibolite facies metamorphism (Foster and Keith, 1994). The extent of mineralization is unknown. The deposit has been trenched, but two diamond drill holes in the 1970s did not encounter mineralization (Eberlein and others, 1977, p. 102). Secondary biotite gave a K-Ar age of 56 +/- 2 Ma (Sinclair, 1986).
|Geologic map unit||(-141.322227314396, 63.5196819111589)|
|Mineral deposit model||Porphyry Cu-Mo deposit (Cox and Singer, 1986; model 21a)|
|Mineral deposit model number||21a|
|Age of mineralization||Secondary biotite gave a K-Ar age of 56 +/- 2 Ma (Sinclair, 1986).|
|Workings or exploration||Explored by trenches, and two drill holes.|
|Indication of production||None|
Additional commentsSee also: Taurus (TC027) and ASARCO (TC001) prospects.
Cobb, E.H., and Eberlein, G.D., 1980, Summaries of data on and lists of references to metallic and selected nonmetallic mineral deposits in the Big Delta and Tanacross quadrangles, Alaska: U.S. Geological Survey Open-File Report 80-1086, 77 p.
Eberlein, G.D., Chapman, R.M., Foster, H.L., and Gassaway, J.S., 1977, Map and table describing known metalliferous and selected nonmetalliferous mineral deposits in central Alaska: U.S. Geological Survey Open-File Report 77-168-D, 132 p., 1 sheet, scale 1:1,000,000.
Foster, H.L., and Keith, T.E.C., 1994, Geology of the Yukon-Tanana area of east-central Alaska: in Plafker, G. and Berg, H.C., eds, The geology of North America, vol. G-1, The geology of Alaska: Geological Society of America, p. 205-240.
Sinclair, W.D., 1986, Molybdenum, tungsten, and tin deposits and associated granitoid intrusions in the northern Canadian cordillera and adjacent parts of Alaska, in Morin, J.A., ed., Mineral deposits of the northern cordillera: Canadian Institute of Mining and Metallurgy, Special Volume 37, p. 216-233.
|Reporters||C.E. Cameron (ADGGS)|
|Last report date||4/13/1999|