Sierrita

United States· ArizonaProduction
Contained Copper
10.0 Mt
Average Grade
0.25%
Deposit Type
Porphyry Cu-Mo
Discovery Year
1950

Overview

Laramide porphyry Cu-Mo system. Significant molybdenum byproduct.

Geological Context

Host Rock: Quartz monzonite porphyry (Laramide)

Tectonic Setting: Continental arc

Geological Province: Basin and Range

Metallogenic Belt: Western US Porphyry Belt

Resources & Operations

Operator: Freeport-McMoRan

Mining Method: Open Pit

Data Provenance

Source: Freeport-McMoRan reports

Last Verified: 2025-12-01

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