Commodities
PrimaryGold
SecondarySilver
TertiaryLead, Zinc, Copper
Commodity typeM
Deposit
Deposit sizeS
WorkingsUnderground
Orebody formCHUTE , CHIMNEY-LIKE
Ore controlFissure
Materials
Ore mineralsArgentite, Chalcopyrite, Galena, Gold, Sphalerite
GangueChalcedony, Pyrite, Quartz
Geology
Host rockTuff
Associated rockTuff · Challis Volcanics-Tuff
AlterationHydrothermal Alteration
Economic & production
Development statusPast Producer
First production1877
Discovery year1877
Identification
Deposit ID10105694
MRDS IDW014280
Alternate namesOld Montana, Montana Group
RegionNA
Data scoreB
Coordinates44.44379, -114.70653
References
Umpleby, J. B., 1913, Some Ore Deposits In Northwestern Custer County, Idaho: USGS Bulletin 539, 104 P.Anderson, A. L., 1949, Silver - Gold Deposits Of The Yankee Fork District, Custer County, Idaho: Idaho Bureau Of Mines And Geology Pamphlet 83, 37 P.Bell, R. N., 1935, The Gold Resources Of Idaho: Mining And Contracting Review, V. 33, No. 37, P. 6 - 7.Stiles, C. A., 1976 , Geology And Alteration Of The West Fork Mayfield Creek Area, Custer County, Idaho: Moscow, Idaho, Univ. Of Idaho M.S. Thesis, P. 103 - 106 .5) Ross, C. P., 1927 , Ore Deposits In The Tertiary Lava In The Salmon River Mountains, Idaho: Idaho Bureau Of Mines And Geology Pamphlet 25 , 20 P.1913 Geolmap Umpleby, J. B., Bulletin 5391949 Recon Idaho Bureau Of Mines And Geology Pamphlet 83U.S. Bureau Of Mines Open-File Report MLA 6-91, 1991, Table A-3, No. 474, P. 218.Anderson, A. L., 1949, Idaho Bureau Of Mines And Geology Pamphlet 83; Item 2, Bell, R. N., 1935, Mining And Contracting Review, V. 33, No. 37