Mine detail: Mansfield Mine Group

Previously called 'Mansfield No. 1 and 2Black CapSweetRubyRupertLee'

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Location

Lat / long:

31.61707, -110.79985

Resource(M)

Primary:	Lead, Copper, Silver
Secondary:	Gold, Zinc
Tertiary:	Manganese
Ore:	Bornite, Chalcopyrite, Galena, Pyrite, Sphalerite, Tetrahedrite
Gangue:	Biotite, Hornblende, Quartz
Orebody form:	TABULAR
Discovery year:	1879

Production

Operation type:	Unknown
Production size:	Small
Development status:	Producer
First production started:	1881
Last production ended:	1951

Geology

Host type:	Quartz Monzonite,Volcanic Breccia (Agglomerate),Quartz Latite,Plutonic Rock
Associated rock:	Mount Wrightson Formation;Temporal Formation
Associated type:	Rhyolite,Dacite
Structure:	Quartz Monzonite Is Intruded And Overlain By Rhyolite, Dominant Structure In Monzonite Dips 35e; Rhyolite Traversed By A Coarse Sheeting Which Dips 60w
Tectonic:	Mount Wrightson Fault Block
Alteration processes:	Wall Rocks Are Strongly Altered; Rhyolite Altered To Quartz

References

MRDS	M241330
DEP	10046337
Reference	{Deposit:: ABGMT-USBM FILE DATA}{Deposit:: USBM FILES, MANSFIELD MINE GROUP}{Deposit:: ADMR FILE DATA, MANSFIELD MINE}{Deposit:: BLM DISTRICT MINING SHEET 687, 12) USGS PP 748, P. 14-15}{Deposit:: TENNEY, JAMES B., 1927-29, HISTORY OF MINING IN ARIZONA; ARIZONA BUREAU OF MINES, P. 317-318}{Deposit:: ROHRBACHER, ROBERT G. 1964, GEOLOGY OF THE TEMPORAL GULCH-MANSFIELD CANYON AREA SANTA CRUZ COUNTY ARIZONA; M.S. THESIS UNIVERSITY OF ARIZONA, P. 69}{Deposit:: USGS BULL 582, P. 226-229}{Deposit:: ARIZ BUR MINES BULL 191, P. 90, 11) USGS MAP I-614}{Deposit:: ABGMT FILES, STANTON B. KEITH}{Deposit:: ABGMT CLIPPINGS FILE; MANSFIELD MINING AND SMELTING CO., RUPERT GROUP}
Reporter	Calder, Susan R.