Commodities
PrimaryCopper, Lead, Zinc
Commodity typeM
Deposit
Deposit sizeS
WorkingsUnderground
Orebody formPOD/LENS
Ore controlOsburn Fault Zone
Materials
Ore mineralsChalcopyrite, Chrysocolla, Galena, Malachite, Sphalerite
GangueLimonite, Pyrite, Pyrrhotite, Quartz
Geology
Host rockArgillite
StructureA Major Structural Grain Trends Nw And Consists Of Subparallel Faults And Folds. Major Fault Is The Osburn. This Fault Seems To Demarcate A Change In Folding Form With Fold To The North Showing Signs Of More Intense Structural Deformation Than Those To The South
Tectonic settingBelt Basin
AlterationHydrothermal Bleaching Is Common Within A Belt Approx 1 Mi Wide Along The North Side Of The Osburn Fault Zone. It Has Been Used As A Guide To Ore Deposits.
Economic & production
Development statusPast Producer
Identification
Deposit ID10102024
MRDS IDDC11300
RegionNA
Data scoreB
Coordinates47.43348, -115.30628
References
WALLACE, R. E. AND HOSTERMAN, J. W., 1956 , RECONNAISSANCE GEOLOGY OF WESTERN MINERAL COUNTY, MONTANA: US GEOLOGICAL SURVEY BULL. 1027-M, P. 605 .YOUNG, F. M., CROWLEY, F. A., AND SAHINEN, U. M., 1962 , MARKETING PROBLEMS OF SMALL BUSINESS ENTERPRISES ENGAGED IN LEAD AND ZINC MINING: MONTANA BUREAU OF MINES AND GEOLOGY BULL. 30 , P. 31 .CONSV. DIV. COMP. DATE, 01-09-1963WALLACE, R. E. AND HOSTERMAN, J. W., 1956 : US GEOLOGICAL SURVEY BULL. 1027-M, P. 605 .