| Lat / long: | 31.40014, -110.75011 |
| Primary: | Copper, Silver |
| Secondary: | Lead, Gold |
| Ore: | Chalcopyrite, Galena, Pyrite |
| Gangue: | Quartz |
| Orebody form: | TABULAR |
| Discovery year: | 1888 |
| Operation type: | Unknown |
| Production size: | Small |
| Development status: | Producer |
| First production started: | 1903 |
| Last production ended: | 1942 |
| 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 |
| 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) |