For oxide, mixed, and sulfide ore: indicated resources of 554 million short tons at 0.32% Cu; inferred resources of 200 million short tons at 0.30% Cu (based upon 0.1% Cu cut-off for oxide component and 0.3% cut-off for mixed and sulfide component). Under active exploration and development. Discovered in 1960 and mined as open pit and heap leach until 1985. Scheduled for startup in 2016. Primarily a skarn.
Study area name
Nations and Phillips (1997); Excelsior Mining Corp. (2013)
U.S. Geological Survey National Mineral Resource Assessment Team (2002)
Nations, J.D., and Phillips, Ken, 1997, The mining and minerals cluster in ArizonaAn 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.]