Glacier Peak

Porphyry copper deposit in Washington, United States

Names and other identifiers

GMRAP ID 18
Tract name Cascade Arc (003pCu9014)
Site status deposit

Geographic location

Country United States
State or province Washington
Geographic location -120.979166667, 48.197777778
Geologic map unit -120.979166667, 48.197777778
Nearby data

Geologic information

Deposit type Porphyry copper
Age (Ma) 21Ma
Age determination method unknown
Age range 21 Ma
Age reference Singer and others (2008)
Minerals arsenopyrite, azurite/malachite, biotite, bismuth, chalcocite, chalcopyrite, chlorite, copper, covellite, cuprite, enargite, epidote, galena, garnet, gold, marcasite, molybdenite, pyrite, pyrrhotite, realgar, scheelite, sericite, siderite, sphalerite tennantite, tourmaline
Associated rocks breccia, dacite, dacite porphyry, quartz feldspar porphyry, gneiss, granodiorite, quartz diorite, quartz monzonite, schist
Tectonic setting continental margin
Stratigraphic age Miocene

Commodity and development information

Development status Occurrence
Major commodities Cu
Tonnage (Mt) 1,710Mt
Cu grade (%) 0.334%
Mo grade (%) 0.015%
Contained copper 5,710,000t
Gold-Moly ratio -9999

Reference information

Study area name United States
References Lasmanis (1995); Derkey and others (1990); Singer and others (2008)
Site reference U.S. Geological Survey National Mineral Resource Assessment Team (2002)