| Lat / long: | 47.93132, -108.55634 |
| Primary: | Gold, Silver |
| Tertiary: | Fluorine-Fluorite |
| Ore: | Gold, Pyrite |
| Gangue: | Fluorite, Quartz, Sericite |
| Orebody form: | SHOOTS |
| Discovery year: | 1897 |
| Operation type: | Unknown |
| Production size: | Yes |
| Development status: | Producer |
| First production started: | 1903 |
| Host rock: | Deadwood Formation, Limestone & Shales;Gneisses And Schists |
| Host type: | Syenite |
| Associated rock: | Syenite Porphyry Laccolith |
| Associated type: | Syenite |
| Structure: | Little Rocky Mts. - Domal Uplift Formed By Underlying Intrusions Of Tert. Syenite Porphyry, A Group Of High Angle Gravity Faults Radiate From Dom* Center In The Porphyry |
| Tectonic: | Rocky Mountain Foreland |
| Alteration processes: | Sericitization |
| MRDS | W014713 |
| DEP | 10071371 |
| Reference | {Deposit:: DYSON, J. L., 1953, RUBY GULCH GOLD MINING DISTRICT: IN BILLINGS GEOL. SOC. 4TH ANN. FIELD CONF., SEPT. 1953, LITTLE ROCKY MTS. MT, AND S.W. SASKATCHEWAN.}{Deposit:: EMMONS, W. H., 1908, GOLD DEPOSITS OF THE LITTLE ROCKY MTNS, MONTANA, U.S. GEOLOGICAL SURVEY BULL. 340.}{Production:: HUBBARD ET AL, 1964, U.S.B.M. INF. CIRC. 8229., MBMG MEM. 31} |
| Reporter | Mlynarczyk, Meg S. |