| Lat / long: | 37.4364, -108.05704 |
| Primary: | Gold, Silver |
| Tertiary: | Copper, Lead, Tellurium |
| Ore: | Chalcopyrite, Galena |
| Gangue: | Barite, Chalcedony, Garnet, Hematite, Magnetite, Quartz |
| Discovery year: | 1895 |
| Operation type: | Unknown |
| Deposit type: | Vein |
| Production size: | Small |
| Development status: | Past Producer |
| First production started: | 1900 |
| Last production ended: | 1939 |
| Host rock: | Cutler Formation;Dolores Formation |
| Host type: | Mudstone,Shale,Sandstone,Conglomerate |
| Associated rock: | Porphyritic Rocks--Diorite-Monzonite Porphyry;Nonporphyritic Rocks--Diorite |
| Associated type: | Diorite |
| Structure: | San Juan Uplift, Four Corners Platform, La Plata Dome, Diorite Peak Stock |
| Tectonic: | Central Cordillera (Southern Rocky Mtns) |
| Alteration processes: | Silicification, Kaolinitization, Chloritization |
| MRDS | D010804 |
| DEP | 10101870 |
| Reference | {Deposit:: ECKEL, E.B., AND OTHERS, 1949, GEOLOGY AND ORE DEPOSITS OF THE LA PLATA DISTRICT, COLORADO: USGS PROF. PAPER 219, P. 69-70, 93-96, 171.}{Deposit:: BECKER, C.M., 1934, REPORT ON THE TOMAHAWK AND BLACK DIAMOND PROPERTIES, SAN JUAN DISTRICT, LA PLATA COUNTY, COLORADO: UNPUB. ENG. REPT., 5P.}{Deposit:: MCCAUSLAND, ROSS, 1936, TOMAHAWK-BLACK DIAMOND MINES, DURANGO, COLORADO: UNPUB. ENG. REPT., 22 P.}{Deposit:: COLORADO DIV. MINES INF. REPT.}{Production:: ECKEL AND OTHERS, 1949, P. 94 (AS COMPLIED FROM USBM RECORDS).} |
| Reporter | Schwochow, Stephen D. |