Prospect in Alaska, United States with commodities Copper, Molybdenum

Geologic information

Identification information

Deposit ID 10001751
MRDS ID A012536
Record type Site
Current site name Pushbush

Geographic coordinates

Geographic coordinates: -141.32261, 63.51975 (WGS84)
Relative position 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.
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Geographic areas

Country State
United States Alaska


Commodity Importance
Copper Primary
Molybdenum Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Molybdenite Ore
Pyrite Ore

Mineral occurrence model information

Model code 79
USGS model code 21a
Deposit model name Porphyry Cu-Mo
Mark3 model number 2

Nearby scientific data

(1) -141.32261, 63.51975

Comments on the geologic information

  • Geologic Description = The 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 1970's did not encounter mineralization (Eberlein and others, 1977, p. 102). Secondary biotite gave a K-Ar age of 56 +/- 2 Ma (Sinclair, 1986).
  • Age = Secondary biotite gave a K-Ar age of 56 +/- 2 Ma (Sinclair, 1986).

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Mining district

District name Fortymile

Comments on the workings information

  • Workings / Exploration = Explored by trenches, and two drill holes.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A012536
USGS Alaska Resource Data File ARDF TC024

Bibliographic references

  • Deposit

    Singer, D.A., Csejtey, Bela, Jr., and Miller, R.J., 1978, Map and discussion of the metalliferous and selected nonmetalliferous mineral resources of the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Open-file Report 78-588-Q, 33 p., 1 plate, scale 1:250,000.

  • Deposit

    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 map, scale 1:1,000,000.

  • Deposit

    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.

  • Deposit

    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.

  • Deposit

    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.

Comments on the references

  • Primary Reference = Singer and others, 1976

General comments

Subject category Comment text
Deposit Model Name = Porphyry Cu-Mo deposit (Cox and Singer, 1986; model 21a)
Deposit Other Comments = See also: Taurus (TC027) and ASARCO (TC001) prospects.

Reporter information

Type Date Name Affiliation Comment
Reporter 13-APR-99 Cameron, C.E. Alaska Division of Geological and Geophysical Surveys