| Lat / long: | 38.26862, -106.12921 |
| Primary: | Silver, Lead |
| Secondary: | Copper, Gold |
| Tertiary: | Manganese, Zinc, Bismuth |
| Ore: | Argentite, Cerargyrite, Chalcocite, Chalcopyrite, Galena, Proustite, Pyrargyrite, Pyrite, Silver, Sphalerite, Tennantite |
| Gangue: | Fluorite, Nontronite, Psilomelane, Quartz, Rhodochrosite, Wad |
| Orebody form: | TABULAR TO PINCH-AND-SWELL |
| Discovery year: | 1882 |
| Operation type: | Unknown |
| Production size: | Small |
| Development status: | Past Producer |
| First production started: | 1898 |
| Last production ended: | 1922 |
| Host rock: | Eagle Gulch Latite |
| Host type: | Latite |
| Associated rock: | Eagle Gulch Latite |
| Associated type: | Latite |
| Structure: | Bonanza Caldera, Sawatch Range, San Juan Volcanic Field, Rio Grande Rift |
| Tectonic: | Central Cordillera (Southern Rocky Mtns.) |
| Alteration processes: | Early Barren Stage Of Alteration By Fumarolic Or Acid-Hot Spring Activity Resulted In Intense Silicification, Wallrock Replacement By Jasper And Alteration Products Hematite, Diaspore, Alunite, Barite, Zunyite, Rutile, And Kaolin Minerals. Later Mineralizing Stage By Alkaline Or Neutral Solution Deposited Ore And Gangue And Caused Micaceous Alteration (Sericite And Chlorite) And Calcite, Quartz, And Pyrite. |
| MRDS | D008248 |
| DEP | 10012566 |
| Reference | {Deposit:: PATTON, H.B., 1916, GEOLOGY AND ORE DEPOSITS OF THE BONANZA DISTRICT, SAGUACHE COUNTY, COLORADO: COLORADO GEOLOGICAL SURVEY BULL. 9, 136 P.}{Deposit:: BURBANK, W.S., 1932, GEOLOGY AND ORE DEPOSITS OF THE BONANZA MINING DISTRICT, COLORADO: USGS PROF. PAPER 169, 166 P.}{Deposit:: WUENSCH, C.E., 1923, SECONDARY ENRICHMENT AT THE EAGLE MINE, BONANZA, COLO.: AIME TRANS., V. 69, P. 96-109.}{Production:: BURBANK, 1932, P.151, AS COMPILED FROM USGS AND USBM RECORDS} |
| Reporter | Schwochow, Stephen D. |