Commodities
PrimarySilver, Lead, Zinc
SecondaryCopper, Gold
Commodity typeM
Deposit
Deposit typePolymetallic veins
Model85: Polymetallic veins
Deposit sizeY
WorkingsUnderground
Orebody formTABULAR
Ore controlOre Confined To Well Defined Veins; Localized In Sheared & Breccia Zones Between Vein Walls.
Materials
Ore mineralsChalcopyrite, Polybasite, Proustite, Pyrargyrite, Pyrite, Sphalerite, Galena
GangueBarite, Quartz
Geology
Host rockDiorite,Gneiss · Belt, Neihart Quartzite;Gneiss And Schist
Associated rockDiorite,Rhyolite · Snow Creek Porphyry-Pluton & Dikes Of Rhyolite Porphyry;Pinto Diorite-Large Phenocrysts Of Feldspar & Hornblende
StructureZone Of Igneous Intrusions Covering Over 800 Square Km., Pre-Mineral Moulton Fault, Domal Uplift Caused By Intrusion Of Snow Creek Porphyry
Tectonic settingRocky Mountain Foreland
Economic & production
Development statusPast Producer
First production1886
Discovery year1881
Identification
Deposit ID10071380
MRDS IDW014725
RegionNA
Data scoreB
Coordinates46.93435, -110.72501
References
SCHAFER, 1935, GEOLOGY & ORE DEPOSITS - NEIHART MINING DISTRICT, CASCADE COUNTY, MONTANA, MT BUREAU MINES & GEOL. MEM. 13.LAWSON, 1976, DIRECTORY OF MINING ENTERPRISES FOR 1975, MONTANA BUREAU MINES & GEOLOGY BULL. 100.ROBERTSON, A. F., 1951, MINES & MINERAL DEPOSITS - CASCADE COUNTY, U.S. BUREAU MINES INF. CIRC. 7589.KLEINKOPF, M. D., WITKIND, I. J., AND KEEFER, W. R., 1972, AEROMAGNETIC, BOUGUER GRAVITY, AND GENERALIZED GEOLOGIC MAPS OF THE CENTRAL PART OF THE LITTLE BELT MOUNTAINS, MONTANA: U.S. GEOLOGICAL SURVEY MAP GP-837.ROBERTSON, 1951, U.S.B.M. INF. CIRC. 7589.