Mine detail: Northfield Prospect

Previously called 'StevensonMerle 3 and 4'

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Location

Lat / long: 45.12657, -114.33211

Resource(M)

Primary: Copper, Cobalt
Tertiary: Nickel
Ore: Chalcocite, Chalcopyrite, Cobaltite, Copper, Covellite, Safflorite
Gangue: Apatite, Goethite, Pyrite, Pyrrhotite, Quartz
Orebody form: STRINGERS, IRREGULAR
Discovery year: 1951

Production

Operation type: Surface-Underground
Deposit type: Blackbird Co Cu
Production size: None
Development status: Prospect

Geology

Host rock:Banded siltite unit of Apple Creek Formation, Belt Supergroup
Host type:Quartzite
Alteration processes:Tourmaline, Iron Oxides

References

MRDSW000725
MAS160590418
DEP10067853
Reference{Deposit:: Vhay, J.S., 1948, Cobalt-Copper Deposits In The Blackbird District, Lemhi County, Idaho: USGS Strategic Minerals Inv. Prelim. Rept. 3-219, 26 P.}{Deposit:: Shockey, P.N., 1957, Reconnaissance Geology Of The Leesburg Quadrangle, Lemhi County, Idaho: Idaho Bureau Of Mines And Geology Pamphlet 113, 42 P.}{Deposit:: Umpleby, J.B., 1913, Geology And Ore Deposits Of Lemhi County, Idaho: USGS Bulletin 528, 182 P.}{Deposit:: Anderson, A.L., 1943, A Preliminary Report On The Cobalt Deposits In The Blackbird District, Idaho: Idaho Bureau Of Mines And Geology Pamph 61, P. 34}{Deposit:: Johnson, Rick, Close, Terry, and McHugh, Ed, 1998, Mineral resource appraisal of the Salmon National Forest: U.S. Geological Survey Open-File Report 98-478, 277 p. (Stevenson Prospect Area p. 170-171)}{Reserve-Resource:: Unpublished Cobalt Report}
ReporterCoury, Anny B., Duncan, Daniel G. (Miller, Pat), Western Field Operations Center (WFOC), Causey, J. Douglas