| Lat / long: | 47.02314, -112.36262 |
| Primary: | Silver, Lead, Zinc |
| Secondary: | Gold, Copper |
| Ore: | Galena, Pyrite, Sphalerite, Chalcopyrite, Tetrahedrite, Enargite, Polybasite |
| Gangue: | Calcite |
| Orebody form: | LENSES & SHOOTS (fissure veins) |
| Discovery year: | 1898 |
| Operation type: | Underground |
| Deposit type: | porphyry copper |
| Production size: | Yes |
| Development status: | Past Producer |
| First production started: | 1915 |
| Host rock: | Algonkian Belt Series, Metamorphosed Sediments |
| Host type: | Argillite |
| Associated rock: | Diorite Intrusive (Sill);Trachyte Porphyry Dikes |
| Associated type: | Diorite,Trachyte |
| Structure: | Lewis Overthrust, Boulder Batholith, Local Faulting Has Displaced Diorite Sill And Fractured Ore Body |
| Tectonic: | Cordilleran Miogeosyncline |
| Alteration processes: | Seriticization |
| MRDS | W014720 |
| MAS | 300490362 |
| DEP | 10071376 |
| Reference | {Deposit:: PARDEE AND SCHRADER, 1933, METALLIFEROUS DEPOSITS OF THE GREATER HELENA MINING REGION, U.S. GEOLOGICAL SURVEY BULL. 842.}{Deposit:: ROBERTSON, F., 1956, GEOCHEMICAL PROSPECTING BY SOIL ANALYSES IN MT, MT BUREAU OF MINES & GEOLOGY BULL. 7.}{Deposit:: YOUNG, ET AL.,1962, Montana Bureau of Mines and Geology Bulletin 30, P.28}{Deposit:: CROWLEY,1961, Montana Bureau of Mines and Geology Bulletin 25, P.25}{Deposit:: GEACH, 1964, Montana Bureau of Mines and Geology Bulletin 46, P.20}{Deposit:: GEACH, 1966, Montana Bureau of Mines and Geology Bulletin 58, P.26}{Deposit:: REYNER AND TRAUERMAN, 1949, Montana Bureau of Mines and Geology Memoir 31, p.53.}{Deposit:: Miller, R.N., 1973, Unpublished Reprint, Geology of the Heddleston Cu-Mo Deposit L&}{Deposit:: Unpublished Montana Bureau of Mines and Geology File Data}{Production:: USBM MINERALS YEARBOOKS} |
| Reporter | Mlynarczyk, Meg S., Montana Bureau Of Mines And Geology Hgm (R), Causey, J. Douglas |