| Lat / long: | 37.42779, -108.01759 |
| Primary: | Gold, Silver |
| Secondary: | Lead, Copper |
| Tertiary: | Tellurium |
| Ore: | Galena, Gold, Pyrite, Sylvanite |
| Gangue: | Barite, Calcite, Chlorite, Quartz, Sericite |
| Discovery year: | 1895 |
| Operation type: | Underground |
| Deposit type: | Vein |
| Production size: | Small |
| Development status: | Past Producer |
| First production started: | 1895 |
| Last production ended: | 1913 |
| Host rock: | Cutler Formation |
| Host type: | Diorite |
| Associated rock: | Nonporphyritic Rocks--Diorite |
| Associated type: | Diorite |
| Structure: | San Juan Uplift, Four Corners Platform, La Plata Dome, Lewis Mtn Diorite Stock |
| Tectonic: | Central Cordillera (Southern Rocky Mtns) |
| MRDS | D010810 |
| MAS | 80670061 |
| DEP | 10014159 |
| Reference | {Deposit:: ECKEL, E.B., AND OTHERS, 1949, GEOLOGY AND ORE DEPOSITS OF THE LA PLATA DISTRICT, COLORADO: USGS PROF. PAPER 219, P. 73-76, 101-103, PL. 16.}{Deposit:: Neubert and others, 1992, Mineral Appraisal of the San Juan National Forest, Colorado: USBM MLA 2-92, fig. 39, p. 111; p. 114-115.}{Deposit:: BLM MINERAL SURVEY MS 1142, 1144, 9179, 9223, 17252, 19405}{Deposit:: REED, J.R., 1936, REPORT ON COLUMBUS MINES CO., LA PLATA COUNTY, COLORADO--LUCKY BOY, LAST CHANCE, MOONLIGHT, ETC.: UNPUB. ENG. REPT., 3 P.}{Deposit:: COLORADO DIV. MINES INF. REPT.}{Production:: ECKEL AND OTHERS, 1949, P. 101-102 (AS COMPILED FROM USGS AND USBM RECORDS)} |
| Reporter | Buckingham, David A., Schwochow, Stephen D. |