Commodities
PrimaryCopper, Gold, Silver
SecondaryPalladium, Platinum
Commodity typeM
Deposit
Deposit sizeS
WorkingsSurface/Underground
Orebody formFRACTURE FILLING, BRECCIA ZONES, VEINS
Ore controlAlong Diorite Quartzite Contact, Faulting And Shear Zones In Diorite
Materials
Ore mineralsBornite, Chalcopyrite, Chrysocolla, Cuprite, Gold, Malachite, Pyrite, Pyrrhotite, Sperrylite, Tenorite
GangueChlorite, Hematite, Limonite, Quartz
Geology
Host rockDiorite,Gabbro,Quartzite,Argillite · Belt Supergroup
Associated rockHornblendite
StructureDike Lies Along East Limb Of A Broad Anticline. Northwest Folds And Faults, Some Northeast Faulting, North Striking Faults And Shears
Tectonic settingBelt Basin In Prot, Now Part Of Rocky Mountains
AlterationArgillic Alteration In Shears, Diorite Altered To Serpentine And Talc. Regional Greenschist To Epidote-Amphibolite Facies
Economic & production
Development statusPast Producer
Identification
Deposit ID10048516
MRDS IDMP00106
Alternate namesBrown Tunnel
RegionNA
Data scoreB
Coordinates47.2746, -114.40347
References
VAN LOENEN, R.E., HAFFTY, JOSEPH, AND EARHART, R.L., 1984, PLATINUM AND PALLADIUM IN A MAFIC DIKE, SANDERS COUNTY, MONTANA: U.S. GEOLOGICAL SURVEY BULLETIN 1694-G, P. 83-89.INGERSOLL, R.G., JR., GALLOWAY, GARY, AND DUNN, MICHAEL, 1982, FIELD INVENTORY OF MINERAL RESOURCES, FLATHEAD INDIAN RESERVATION, MONTANA: U.S. BUREAU OF MINES REPORT BIA 22-II, 38 P. + APPENDIX.CROWLEY, F.A., 1963, MINES AND MINERAL DEPOSITS (EXCEPT FUELS), SANDERS COUNTY, MONTANA: MONTANA BUREAU OF MINES AND GEOLOGY BULLETIN 34, 58 P.