| Location: | Santa Cruz County, Arizona, United States, North America |
| Lat / long: | 31.49458, -110.74874 |
| dep_id: | 10048345 |
| mrds_id: | M899932 |
| Commodity type: | metallic |
| Major mineral: | Copper, Silver |
| Minor mineral: | Lead, Zinc, Gold |
| Trace mineral: | Iron |
| Operation type: | Unknown |
| Production size: | Small ammount of material produced |
| Development status: | Producer |
| ore: | Bornite, Chalcocite, Chalcopyrite, Cuprite, Galena, Pyrite, Sphalerite, Tetrahedrite |
| gangue: | Hematite |
| orebody_fm: | IRREGULAR |
| work_type: | Underground |
| alteration: | Extensive Surface Oxidation |
| conc_proc: | Secondary Enrichment Along Fault Fissures And Replacement Of Wall Rock; High-Grade Ores Tend To Concentrate With Bands Of Quartz In Fissure Veins |
| ore_ctrl: | Ores Occur Principally In Veins, Fissures, And Contacts In Rhyolite, And Contacts With Grano-Porphyry And Quartz Diorite |
| Reporter: | Calder, Susan R. |
| hrock_type: | Rhyolite,Plutonic Rock |
| arock_unit: | Mt Wrightson Formation;Josephine Canyon Diorite |
| arock_type: | Diorite,Trachyandesite |
| Structure: | General Structure Common To Regional Formations Is A Sheeting Which Dips 40 Nnw, Main Vein Paralleled By Banded Iron Formation-Hematite Dike Showing Some Copper Stain, And By Several Smaller Parallel Quartz Veins; 5 Principal Veins On Property |
| tectonic: | Alum Gulch Fault Block |
| disc_yr: | 1875 |
| References: |
- Deposit:: USBM FILES, EXPOSED REEF MINES
- Deposit:: ADMR FILE DATA, EXPOSED REEF AND BLUE EAGLE GROUPS
- Deposit:: ABGMT FILES, STANTON B. KEITH
- Deposit:: SCHRADER, FRANK C., 1915, MINERAL DEPOSITS OF THE SANTA RITA AND PATAGONIA MOUNTAINS, ARIZONA; USGS BULLETIN 582, P.257-258
- 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:: SIMONS, FRANK S., 1972, MESOZOIC STRATIGRAPHY OF THE PATAGONIA MOUNTAINS AND ADJOINING AREAS, SANTA CRUZ COUNTY, ARIZONA; USGS PROFESSSIONAL PAPER 658-E
- Deposit:: ABGMT CLIPPINGS FILE, EXPOSED REEF MINE
- Deposit:: MOORES, RICHARD C., 1972, THE GEOLOGY AND ORE DEPOSITS OF A PORTION OF THE HARSHAW DISTRICT, SANTA CRUZ COUNTY, ARIZONA; M.S. THESIS, UNIVERSITY OF ARIZONA
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