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Porphyry copper deposit in Alaska, United States

Names and other identifiers

GMRAP ID 2
Tract name Yukon-Tanana Upland (003pCu5003)
Site status deposit

Geographic location

Country United States
State or province Alaska
Geographic location -157.05, 64.133333333
Geologic map unit -157.05, 64.133333333
Nearby data

Geologic information

Deposit type Porphyry copper
Age (Ma) 75Ma
Age determination method unknown
Age range 75 Ma
Age reference Singer and others (2008)
Minerals actinolite, biotite, calcite, chalcocite, chalcopyrite, chlorite, epidote, galena, montmorillonite, pyrite, sphalerite, tetrahedrite
Associated rocks breccia, quartz monzonite porphyry, skarn, amphibolite, shale
Tectonic setting continental margin
Stratigraphic age Late Cretaceous

Commodity and development information

Development status Occurrence
Major commodities Cu
Tonnage (Mt) 55Mt
Cu grade (%) 0.2%
Contained copper 100,000t
Gold-Moly ratio -9999

Reference information

Study area name United States
References Young and others (1997); Singer and others (2008)
Site reference U.S. Geological Survey National Mineral Resource Assessment Team (2002)
Singer, D.A., Berger, V.I., and Moring, B.C., 2008, Porphyry copper deposits of the world—Database and grade and tonnage models, 2008: U.S. Geological Survey Open-File Report 2008-1155, [45] p. and digital data, accessed December 31, 2013, at http://pubs.usgs.gov/of/2008/1155/.
Young, L.E., St. George,P., and Bouley, B.A., 1997,Porphyry copper deposits in relation to the magmatic history and palinspastic restoration of Alaska, in Goldfarb, R.J., and Miller, L.D., eds., Mineral deposits of Alaska: Economic Geology Monograph 9, p. 306–333.