Mine detail: Helvetia-Rosemont District

Previously called 'RosemontBroadtop ButtePeach-ElginHelvetia DepositCopper World'

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Location

Lat / long:

31.86683, -110.78398

Resource(M)

Primary:	Copper
Secondary:	Zinc, Silver
Tertiary:	Molybdenum, Tungsten
Discovery year:	1861

Production

Operation type:	Unknown
Deposit type:	SKARN, PYROMETASOMATIC
Production size:	Medium
Development status:	Past Producer
First production started:	1870

Geology

Structure:	BACKBONE FAULT-- A COMPLEX ZONE CONSISTING OF THRUST FAULTS, HIGH-ANGLE NORMAL AND REVERSE FAULTS, TEAR FAULTS; FOLDING
Alteration processes:	CONTACT PYROMETASOMATIC (SKARNIFICATION), SILICIFICATION, ARGILLIZATION, PYRITIZATION

References

MRDS	D000804
DEP	60000203
Reference	{Deposit:: LEMMON, D.M., UNPUBLISHED DATA.}{Deposit:: LEMMON, D.M., AND TWETO, O.L., 1962, TUNGSTEN IN THE U.S., USGS MAP, MR-25.}{Deposit:: SAWYER, M.B., GURMENDI, A.C., DALEY, M.R., AND HOWELL, S.B., 1992, PRINCIPAL DEPOSITS OF STRATEGIC AND CRITICAL MINERALS IN ARIZONA: U.S. BUREAU OF MINES SPECIAL PUBLICATION, 334 P.}{Deposit:: ANZALONE, S.A., AND BROWN, R.L., 1992, GEOLOGYOF THE HELVETIA COPPER DEPOSIT--ARIZONA: SOCIETY FOR MINING, METALLURGY, AND EXPLORATION, INC. PREPRINT NO. 92-61, 5 P.}