| Lat / long: | 46.98352, -110.69528 |
| Primary: | Lead, Copper, Silver |
| Secondary: | Zinc, Gold |
| Ore: | Chalcopyrite, Galena, Malachite, Pyrite, Sphalerite, Tetrahedrite, Cerussite, Azurite |
| Gangue: | Quartz, Barite, Hematite |
| Orebody form: | ELLIPTICAL PIPE |
| Discovery year: | 1875 |
| Operation type: | Unknown |
| Deposit type: | Polymetallic veins |
| Production size: | Yes |
| Development status: | Past Producer |
| First production started: | 1921 |
| Host rock: | Silver Dyke Breccia-Fragments Of Granite & Rhyolite Porphyry And Gneiss;Gneiss |
| Host type: | Gneiss,Volcanic Breccia (Agglomerate) |
| Associated rock: | Snow Creek Porphyry-Pluton & Dikes Of Rhyolite Porphyry & Alaskite;Carpenter Creek Porphyry-Dikes Of Granite Porphyry;Pinto Diorite-Large Phenocrysts Of Feldspar & Hornblende |
| Associated type: | Diorite,Rhyolite |
| Structure: | Zone Of Igneous Intrusions Covering Over 800 Square Km, Domal Uplift Caused By Intrusion Of Snow Creek Porphyry, Northeast-Trending Fractures And Faults |
| Tectonic: | Rocky Mountain Foreland |
| Alteration processes: | Host Rock Highly Altered To Kaolin, Sericite And Quartz. |
| MRDS | W014671 |
| DEP | 10071338 |
| Reference | {Deposit:: MARVIN, R. F., AND OTHERS, 1973, RADIOMETRIC AGES OF INTRUSIVE ROCKS IN THE LITTLE BELT MOUNTAINS, MONT: GEOL. SOC. AM. BULL. VOL. 84, NO. 6 P. 1977-1986.}{Deposit:: ROBERTSON, A. F., 1951, MINES AND MINERAL DEPOSITS (EXCEPT FUELS), CASCADE COUNTY, MONT: U.S. BUREAU OF MINES INF. CIRC. 7589, 76 P.}{Deposit:: SCHAFER, P. A., 1935, GEOLOGY AND ORE DEPOSITS OF THE NEIHART MINING DISTRICT, CASCADE COUNTY, MONT: MONT. BUREAU OF MINES GEOL., MEM. 13, 62 P.}{General:: YOUNG, G.J., 1927, NOVEL MINING AND MILLING METHODS AT THE SILVER DYKE PROPERTY AT NEIHART, MONTANA: ENGINEERING AND MINING JOURNAL V. 123, NO. 6, P. 236-241, FEB. 5, 1927.}{Geology:: WEED, W.H., 1900, THE GEOLOGY OF THE LITTLE BELT MOOUNTAINS, MONTANA: U.S. GEOLOGICAL SURVEY TWENTIETH ANNUAL REPORT, PART 3.}{Production:: ROBERTSON, 1951, USBM INF. CIRC. 7589} |
| Reporter | Krohn, Douglas H. |