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Brooks Range

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Proterozoic, Devonian, or Cretaceous grantitic intrusions in the Brooks Range.
Tract ID 003pCu5008
Country United States of America
Commodity Cu
Study area name United States revised - Alaska
Tectonic setting mixed
Deposit type porphyry copper
Grade-tonnage model Not assessed
Geologic age
Geologic feature age Proterozoic, Devonian, or Cretaceous
Generalized age Paleozoic
Oldest rocks age 416Ma
Youngest rocks age 65.6Ma
Age range 350.4Ma
Known prospects 1
Map scales used 250K

(A quantitative assessment of this tract was not carried out.)

Bibliographic references

General U.S. Geological Survey National Mineral Resource Assessment Team (2002)
U.S. Geological Survey National Mineral Resource Assessment Team, 2002, Assessment of undiscovered deposits of gold, silver, copper, lead, and zinc in the United States—A portable document (pfd) recompilation of USGS Open-file Report 96-96 and Circular 1178, recompiled by Paul Schruben: U.S. Geological Survey Open-File Report 02-198, http://pubs.usgs.gov/of/2002/of02-198/.

Deposits and prospects associated with this tract

Name Type State Country Development Details
unnamed prospect Alaska United States Prospect Details
Venus prospect Alaska United States Prospect Details
Evelyn Lee prospect Alaska United States Prospect Details