| Lat / long: | 40.48692, -105.21087 |
| Primary: | Gold, Silver |
| Secondary: | Tungsten |
| Tertiary: | Copper, Nickel |
| Ore: | Chalcopyrite, Pyrite, Scheelite |
| Gangue: | Epidote, Hematite, Limonite, Malachite, Montmorillonite, Quartz |
| Discovery year: | 1900 |
| Operation type: | Unknown |
| Deposit type: | Vein |
| Production size: | Small |
| Development status: | Producer |
| Last production ended: | 1955 |
| Host rock: | Tonalite;Metasedimentary Rocks--Mica Schist |
| Host type: | Tonalite |
| Associated rock: | Tonalite;Diorite And Andesite |
| Associated type: | Tonalite |
| Structure: | Front Range Uplift, Cheyenne Basin, Big Thompson Anticline, Milner Mountain Fault, Fletcher Hill (Buck Horn) Fault, Masonville Anticline, Buckhorn Syncline, Masonville Stock , Redstone Fault |
| Tectonic: | Central Cordillera (Southern Rocky Mtns) |
| Alteration processes: | Hydrothermal Montmorillonite In Fractures; Wallrock Silicification ; Sericitization Of Andalusite In Schist |
| MRDS | D010561 |
| DEP | 10107993 |
| Reference | {Deposit:: WOLFE, J.A., 1953, GEOLOGY OF THE MASONVILLE MINING DISTRICT, LARIM ER COUNTY, COLORADO: COLORADO SCHOOL OF MINES M.SC. THESIS T-789.}{Deposit:: BRADDOCK, W.A., AND OTHERS, 1970, GEOLOGIC MAP OF THE MASONVILLE QU ADRANGLE, LARIMER COUNTY, COLORADO: USGS MAP GQ-832.}{Deposit:: COBB, H.S., 1960, TUNGSTEN MINES OF COLORADO: COLORADO METAL MINING FUND BD.}{Deposit:: BELSER, CARL, 1956, TUNGSTEN POTENTIAL IN CHAFFEE, FREMONT, GUNNISO N, LAKE, LARIMER, PARK, AND SUMMIT COUNTIES, COLORADO: USBM IC-7748, P . 18.}{Deposit:: BLM MINERAL SURVEYS}{Deposit:: VANDERWILT, J.W., 1947, MINERAL RESOURCES OF COLORADO: COLORADO MIN ERAL RESOURCES BD., P. 139.}{Deposit:: COLORADO DIV. MINES INF. REPTS.}{Production:: VANDERWILT, 1947, P. 139; BELSER, 1956, P. 18} |
| Reporter | Schwochow, Stephen D. |