Commodities
PrimaryLead, Silver
SecondaryCopper
Commodity typeM
Deposit
Deposit sizeN
WorkingsUnderground
Ore controlOsburn Fault Zone
Materials
Ore mineralsChalcopyrite, Galena
GangueHematite, Pyrite, Quartz, Siderite
Geology
Host rockQuartzite · Burke Formation;Revett Formation
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 Folds To The North Showing Signs Of More Intense Structural Deformation Than Those To The South., Owing To Its Proximity To The Osborn Fault Beds Are Greatly Deformed And Are In Tight, Overturned, Nearly Isoclinal Folds
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 statusOccurrence
Identification
Deposit ID10019047
MRDS IDDC08403
RegionNA
Data scoreB
Coordinates47.41765, -115.33294
References
SRC.REF: WALLACE, R. E. AND HOSTERMAN, J. W., 1956 : US GEOLOGICAL SURVEY BULL. 1027-MWALLACE, R. E. AND HOSTERMAN, J. W., 1956 , RECONNAISSANCE GEOLOGY OF WESTERN MINERAL COUNTY MONTANA: US GEOLOGICAL SURVEY BULL. 1027-M, P. 607 .CONSV. DIV. COMP. DATE, 02-15-1963