Description
James J. Neihart
Commodities
PrimarySilver, Lead, Zinc
SecondaryGold, Copper
TertiaryBarium-Barite
Commodity typeB
Deposit
Deposit sizeY
WorkingsUnderground
Orebody formSHOOTS
Ore controlMineralization Concentrated At Junction Of Diagonal Split With Main Vein.
Materials
Ore mineralsChalcopyrite, Galena, Pyrite, Silver, Smithsonite, Sphalerite
GangueAnkerite, Barite, Quartz
Geology
Host rockGneiss · Belt, Neihart Quartzite;Gneiss And Schist
Associated rockDiorite,Rhyolite · Snow Creek Porphyry-Pluton And Dikes Of Rhyolite Porphyry;Pinto Diorite-Large Phenocrysts Of Feldspar And Hornblende
StructurePre-Mineral Moulton Fault, Domal Uplift Caused By Intrusion Of Snow Creek Porphyry, Zone Of Igneous Intrusions Covering Over 800 Square Km
Tectonic settingRocky Mountain Foreland
AlterationShallow Oxidation
Economic & production
Development statusPast Producer
Discovery year1881
Identification
Deposit ID10071379
MRDS IDW014724
Alternate namesQueen Mine, O'Brien Mine
RegionNA
Data scoreB
Coordinates46.9388, -110.74112
References
SCHAFER, P. A., 1935, GEOLOGY & ORE DEPOSITS - NEIHART MINING DIST., CASCADE COUNTY, MT, MT BUREAU MINES & GEOLOGY MEMOIR 13.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-837ROBERTSON, 1951, U.S.B.M. INF. CIRC. 7589