| Lat / long: | 39.84443, -105.28141 |
| Primary: | Uranium |
| Secondary: | Copper, Molybdenum |
| Tertiary: | Zinc, Lead, Silver, Gold, Bismuth, Manganese, Nickel, Cobalt |
| Ore: | Bismuth, Bornite, Chalcanthite, Chalcocite, Coffinite, Covellite, Galena, Jordisite, Marcasite, Molybdenite, Niccolite, Pyrite, Pyrrhotite, Silver, Sphalerite, Uranophane |
| Gangue: | Ankerite, Barite, Calcite, Chlorite, Fluorite, Hematite, Limonite, Quartz, Sericite |
| Orebody form: | LENTICULAR, LINEAR, IRREGULAR |
| Discovery year: | 1884 |
| Operation type: | Unknown |
| Production size: | Medium |
| Development status: | Producer |
| First production started: | 1895 |
| Host rock: | Idaho Springs Formation-Hornblende Gneiss Unit;Idaho Springs Formation-Microcline-Quartz-Plagioclase-Biotite Gneiss |
| Host type: | Gneiss,Pegmatite |
| Associated rock: | Granitic Pegmatite;Hornblende Diorite And Hornblendite |
| Associated type: | Hornblendite,Pegmatite |
| Structure: | Front Range Uplift, Denver Basin, Idaho Springs-Ralston Shear Zone, Rogers, Hurricane Hill, Junction Ranch, And Livingston Fault Systems (Breccia Reefs) |
| Tectonic: | Central Cordillera (Southern Rocky Mtns) |
| Alteration processes: | Alteration Of Fe And Cu Minerals And U Ore; Potassic Alteration; Some Silicification |
| MRDS | D010161 |
| DEP | 10087816 |
| Reference | {Deposit:: ADAMS, J.W., AND OTHERS, 1953, URANIUM OCCURRENCES IN THE GOLDEN GATE CANYON AND RALSTON CREEK AREAS, JEFFERSON COUNTY, COLORADO: USGS CIRC. 320.}{Deposit:: ADAMS, J.W., AND STUGARD, FREDERICK, JR., 1956, WALL-ROCK CONTROL OF CERTAIN PITHBLENDE DEPOSITS IN GOLDEN GATE CANYON, JEFFERSON COUNTY, COLORADO: USGS BULL. 1030-G.}{Deposit:: NELSON-MOORE, J.L., AND OTHERS, 1978, RAIDOACTIVE MINERAL OCCURRENCES OF COLORADO AND BIBLIOGRAPHY: CGS BULL. 40, P. 189-196.}{Deposit:: SHERIDAN, D.M., AND OTHERS, 1967, GEOLOGY AND URANIUM DEPOSITS OF THE RALSTON BUTTES DISTRICT, JEFFERSON COUNTY, COLORADO: USGS PROF. PAPER 520 (INCLUDES QUAD GEOLOGIC MAP OF RALSTON BUTTES QUAD).}{Deposit:: SIMS, P.K., AND SHERIDAN, D.M., 1964, GEOLOGY OF URANIUM DEPOSITS IN THE FRONT RANGE, COLORADO: USGS BULL. 1159.}{Production:: SHERIDAN AND OTHERS, 1967, P. 75; COLORADO DIV. MINES ANN. OPERATORS REPTS.} |
| Reporter | Schwochow, Stephen D. |