Mine detail: Proto Mine Group

Previously called 'ThesssaliaGladstone-Proto GroupGladstone Mine'

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Location

Lat / long:

31.40014, -110.75011

Resource(M)

Primary:	Copper, Silver
Secondary:	Lead, Gold
Ore:	Chalcopyrite, Galena, Pyrite
Gangue:	Quartz
Orebody form:	TABULAR
Discovery year:	1888

Production

Operation type:	Unknown
Production size:	Small
Development status:	Producer
First production started:	1903
Last production ended:	1942

Geology

Host type:	Quartz Monzonite
Associated type:	Diorite,Hornblendite
Structure:	Deposits Occur In Form Of Subordinate Veins, Lenses, Stringers, And Seams In Intrusive Fissures, Joints, Sheeting Planes, And Other Fractures In Quartz Monzonite And Diorite, Diorite Forms Footwall And Quartz Monzonite Forms Hanging Wall Of Vein System
Tectonic:	Guajolote Fault Block; Nw-Trending Inferred Guajolote Fault Lies To E Of Deposits; Downthrow To E
Alteration processes:	Quartz Vein Is Banded, Drusy, And Highly Iron-Stained At Surface; Strong Wallrock Alteration

References

MRDS	M899915
DEP	10048333
Reference	{Deposit:: MSBM-ABGMT PRODUCTION DATA; GLADSTONE-PROTO MINE GROUP}{Deposit:: SCHRADER, F.C., 1915, USGS BULL 582, P. 316-317}{Deposit:: KEITH, S.B., 1975, INDEX OF MINING PROPERTIES IN SANTA CRUZ COUNTY, ARIZONA; ARIZONA BUREAU OF MINES BULLETIN 191, P. 81}{Deposit:: ADMR FILE DATA, GLADSTONE (PROTO, INDEPENDENCE) MINE}{Deposit:: USBM FILES, PROTO GROUP}{Deposit:: ABGMT CLIPPINGS FILE, GLADSTONE MINE}{Deposit:: SIMONS, FRANK S., 1974, GEOLOGIC MAP AND SECTIONS OF THE NOGALES AND LOCHIEL QUADRANGLES, SANTA CRUZ COUNTY, ARIZONA; USGS MAP I-762 (1:48000)}{Deposit:: ABGMT FILES, STANTON B. KEITH}{Deposit:: TENNEY, JAMES B., 1927-1929, HISTORY OF MINING IN ARIZONA; ARIZONA BUREAU OF MINES P. 313}
Reporter	Laraba, Peter H. (Calder, Susan)