Four Metals

Porphyry copper prospect in Arizona, United States

Names and other identifiers

Tract name Western Sierra Madre Occidental and Laramide Central (003pCu3007x)
Site status prospect

Geographic location

Country United States
State or province Arizona
Geographic location -110.736993201, 31.399781388
Geologic map unit -110.736993201, 31.399781388
Nearby data

Geologic information

Deposit type Porphyry copper
Age determination method Geologic inference
Age range ~80–35 Ma (Laramide orogeny)
Age reference geologic inference
Tectonic setting continental margin
Stratigraphic age Late Cretaceous–Paleocene–Eocene

Commodity and development information

Development status Prospect
Major commodities Cu
Gold-Moly ratio -9999

Reference information

Comments Total reserves and resources April 3, 2007 of 21,410,000 t at 0.58% Cu for 4M breccia pipe associated with a locally porphyrytic biotite-hornblende granodiorite.
Study area name United States
References Nations and Phillips (1997); Black Pearl Minerals Consolidated Inc. (2007)
Site reference U.S. Geological Survey National Mineral Resource Assessment Team (2002)
Black Pearl Minerals Consolidated Inc., 2007, Black Pearl drills 18 meters of 0.81% copper, 0.139% molybdenum at 4 Metals property—Acquires additional property: Black Pearl Minerals Consolidated Inc., press release, September 10, 2007, 1 p., accessed June 14, 2014, at
Nations, J.D., and Phillips, Ken, 1997, The mining and minerals cluster in Arizona—An analysis for the strategic economic development vision for the Arizona-Sonora region: Flagstaff, Northern Arizona Uinversity, Bureau of Business and Economic Research, 112 p. [Later published in 2010 as Arizona Department of Mines and Mineral Resources Special Report 27.]