Mine detail: Moulton Mine

<< Back to the map

<< Back to browsing

Location:	Cascade County, Montana, United States, North America
Lat / long:	46.93935, -110.73445
dep_id:	10071389
mrds_id:	W014736
Commodity type:	metallic
Major mineral:	Silver
Minor mineral:	Lead, Zinc
Operation type:	Unknown
Production size:	Production occurred
Development status:	Producer
ore:	Polybasite, Proustite, Pyrite
gangue:	Barite, Rhodochrosite
orebody_fm:	TABULAR
work_type:	Underground
alteration:	Sericitization & Carbonatization
conc_proc:	Supergene & Hypogene Enrichment
ore_ctrl:	Ore Localized In Shoots Caused By Intersection Of Main Vein With Gneiss Banding - Ore Also Improves As Vein Nears Fault
Reporter:	Mlynarczyk, Meg S.
hrock_unit:	Belt, Neihart Quartzite;Gneiss And Schist
hrock_type:	Gneiss
arock_unit:	Snow Creek Porphyry-Pluton And Dikes Of Rhyolite Porphyry;Pinto Diorite-Large Phenocrysts Of Feldspar & Hornblende
arock_type:	Diorite,Rhyolite
Structure:	Zone Of Igneous Intrusions Covering Over 800 Square Km, Moulton Fault - With N 70 Deg W Strike And Steep 85 Deg N Dip. - Suggested To Be Pre-Mineral
tectonic:	Rocky Mountain Foreland
Year first produced:	1895
disc_yr:	1882
discr:	Jonathan Mcassey
References:	Deposit:: SCHAFER, 1935, GEOLOGY & ORE DEPOSIT S - NEIHART MINING DISTRICT, CASCADE COUNTY, MONTANA, MT BUREAU MINES & GEOLOGY MEMOIR 13. Deposit:: LAWSON, D. C., 1976, DIRECTORY OF MINING ENTEPRISES FOR 1975, MONTANA BUREAU MINES & GEOLOGY BULL. 100. Deposit:: ROBERTSON, A. F., 1951, MINES & MINERAL DEPOSITS - CASCADE COUNTY, U. S. BUREAU MINES INF. CIRC. 7589. Deposit:: 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 Production:: ROBERTSON, 1951, U.S.B.M. INF. CIRC. 7589