Porphyry copper prospect in Alaska, United States

Names and other identifiers

Alternate names Unnamed (Bruce Hills)
Tract name Southeast Alaska Tertiary (003pCu5005)
Site status prospect

Geographic location

Country United States
State or province Alaska
Geographic location -136.341, 58.983
Geologic map unit -136.341, 58.983
Nearby data

Geologic information

Deposit type Porphyry copper
Age determination method Geologic inference
Age range Tertiary
Age reference geologic inference
Minerals chalcopyrite, galena, hematite, malachite, molybdenite, molybdite, pyrrhotite, sphalerite
Tectonic setting continental margin
Stratigraphic age Tertiary

Commodity and development information

Development status Prospect
Major commodities Cu, Mo
Minor commodities Ag, Pb, Zn
Gold-Moly ratio -9999

Reference information

Comments Foliated granodiorite that is part of a batholithic mass that underlies much of the northeast part of Glacier Bay National Park and Preserve. A resource exists in the mid 0.0X percent range for copper and low 0.0X range for molybdenum; local zones are of higher grade. K-feldspar occurs as a secondary mineral in and near quartz veins, and the host granodiorite is anomalously rich in K-feldspar, particularly south and east of the deposit. The occurrence of copper and molybdenum in the Bruce Hillswas first reported in 1963. Seven claims were staked in 1967 and the deposit was blanketed by 55 claims in 1969.
Study area name United States
References U.S. Geological Survey (2014a); Kimball and others (1978); Rossman (1963)
Site reference U.S. Geological Survey National Mineral Resource Assessment Team (2002)