Deposits, prospects, and permissive tracts for porphyry and sediment-hosted copper resources worldwide, with estimates of undiscovered copper resources.
|Tract name||Deposit type||Geology|
|Cascade Arc||porphyry copper||U.S. part of a continental margin arc that formed during subduction of the Pacific and Juan de Fuca plates beneath western North America|
|Intermontane Island-Arc||porphyry copper||Porphyry Cu systems associated with pre-accretionary Triassic and Jurassic calc-alkalic island arcs that formed offshore of western North America|
|Intermontane Island-Arc Cu-Au||porphyry copper||Triassic and Jurassic alkalic igneous rocks of accreted island arcs that formed offshore of western North America|
|Cordilleran Continental Arc||porphyry copper||Porphyry Cu systems associated with predominantly calc-alkalic igneous rocks of post-accretionary continental magmatic arcs (Jurassic-Eocene)|
|Pacific Margin||porphyry copper||Cretaceous through middle Tertiary volcanic and intrusive rocks representing a series of continental- and island-arc systems accreted and superimposed onto the paleomargin of northeast Asia.|