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Jervois Idaho Cobalt Operations Mine, Blackbird Mining District, Lemhi County, Idaho, USAi
Regional Level Types
Jervois Idaho Cobalt Operations MineMine (Active)
Blackbird Mining DistrictMining District
Lemhi CountyCounty
IdahoState
USACountry

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Latitude & Longitude (WGS84):
45° 8' 26'' North , 114° 20' 59'' West
Latitude & Longitude (decimal):
45.14064,-114.34997
GeoHash:
G#:c2n8vcsgk
GRN:
N31W58
Type:
Mine (Active) - last checked 2024
Age:
2500 to 541 ± 1.0 Ma
Geologic Time:
Proterozoic
Köppen climate type:
Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Salmon3,036(2017)35.8km
Mindat Locality ID:
443182
Long-form identifier:
mindat:1:2:443182:7
GUID (UUID V4):
e7274b8c-7d32-4bc7-9946-f0405bab3790


The Idaho Cobalt Mine Property is owned by Jervois Mining USA, a wholly owned subsidiary of Jervois, and consists of 163 contiguous unpatented lode mining claims located in east central Idaho, approximately 25.8 miles (ca. 42 km) west of the town of Salmon. The property covers 2,520 acres and encircles the inactive Blackbird mine and encompasses the Ram, Sunshine, and East Sunshine deposits and more than a dozen under-explored prospects and exploration targets.

The Idaho Cobalt Mine is hosted in Proterozoic age metasediments found on the east side of the central Idaho Batholith, comprising granitic-to-granodioritic rocks. The host sedimentary rocks are believed to have been part of a large fault-bounded marine sedimentary basin in which dominantly clastic sediments were deposited. The basin is now part of a supergroup of dominantly quartzite and argillite metasedimentary rock, the base of which is referred to as the Apple Creek Formation. All significant copper-cobalt deposits and occurrences are found in the Apple Creek Formation in a 30 to 35-mile-long linear belt known as the Idaho Cobalt Belt. The deposits are tabular/stratiform, strike north-northwest, with gentle dips of between 50 and 60 degrees to the west. Aside from the Ram deposit, there are two other sub-parallel deposits, namely the Sunshine and East Sunshine, which are located about 1 mile (1.61 km) to the south of the Ram. Mineralization at the Idaho Cobalt Mine is closely associated with the mafic sequences of the middle unit of the Apple Creek Formation. Dominant ore minerals include cobaltite and chalcopyrite, with lesser, variable occurrences of gold. Other minerals present in small quantities are pyrite, pyrrhotite, arsenopyrite, linnaeite, löllingite, safflorite, enargite, and marcasite.

Select Mineral List Type

StandardDetailedGalleryStrunzChemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


11 valid minerals.

Detailed Mineral List:

ⓘArsenopyrite
Formula:FeAsS
ⓘChalcopyrite
Formula:CuFeS2
ⓘCobaltite
Formula:CoAsS
ⓘEnargite
Formula:Cu3AsS4
ⓘGold
Formula:Au
ⓘLinnaeite
Formula:Co2+Co3+2S4
ⓘLöllingite
Formula:FeAs2
ⓘMarcasite
Formula:FeS2
ⓘPyrite
Formula:FeS2
ⓘPyrrhotite
Formula:Fe1-xS
ⓘSafflorite
Formula:(Co,Ni,Fe)As2

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘGold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘPyrrhotite2.CC.10Fe1-xS
ⓘLinnaeite2.DA.05Co2+Co3+2S4
ⓘPyrite2.EB.05aFeS2
ⓘMarcasite2.EB.10aFeS2
ⓘLöllingite2.EB.15aFeAs2
ⓘSafflorite2.EB.15a(Co,Ni,Fe)As2
ⓘArsenopyrite2.EB.20FeAsS
ⓘCobaltite2.EB.25CoAsS
ⓘEnargite2.KA.05Cu3AsS4

List of minerals for each chemical element

SSulfur
SⓘArsenopyriteFeAsS
SⓘChalcopyriteCuFeS2
SⓘCobaltiteCoAsS
SⓘEnargiteCu3AsS4
SⓘLinnaeiteCo2+Co23+S4
SⓘMarcasiteFeS2
SⓘPyriteFeS2
SⓘPyrrhotiteFe1-xS
FeIron
FeⓘArsenopyriteFeAsS
FeⓘChalcopyriteCuFeS2
FeⓘLöllingiteFeAs2
FeⓘMarcasiteFeS2
FeⓘPyriteFeS2
FeⓘPyrrhotiteFe1-xS
FeⓘSafflorite(Co,Ni,Fe)As2
CoCobalt
CoⓘCobaltiteCoAsS
CoⓘLinnaeiteCo2+Co23+S4
CoⓘSafflorite(Co,Ni,Fe)As2
NiNickel
NiⓘSafflorite(Co,Ni,Fe)As2
CuCopper
CuⓘChalcopyriteCuFeS2
CuⓘEnargiteCu3AsS4
AsArsenic
AsⓘArsenopyriteFeAsS
AsⓘCobaltiteCoAsS
AsⓘEnargiteCu3AsS4
AsⓘLöllingiteFeAs2
AsⓘSafflorite(Co,Ni,Fe)As2
AuGold
AuⓘGoldAu

Other Regions, Features and Areas containing this locality

North America
North America PlateTectonic Plate
North America Plate
USA

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, pleaseregister so you can add to our database. This locality information is for reference purposes only. You should never attempt tovisit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holdersfor access and that you are aware of all safety precautions necessary.

References

M. Sletten, S. Zelligan, D. Frost, N. Yugo, C. Charbonneau, D. Cameron, Idaho Cobalt Operations, Form 43-101F1 Technical Report - Feasibility Study, (M3-PN190348), Effective Date: January 20, 2020, Issue Date: November 13, 2020, Revision 0.
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