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Coeur Mine (Rainbow; Mineral Point), Osburn, Coeur d'Alene District, Shoshone Co., Idaho, USAi
Regional Level Types
Coeur Mine (Rainbow; Mineral Point)Mine
Osburn- not defined -
Coeur d'Alene DistrictMining District
Shoshone Co.County
IdahoState
USACountry

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Key
Lock Map
Latitude & Longitude (WGS84):
47° 29' 24'' North , 115° 59' 22'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
Osburn1,510 (2017)1.9km
Wallace761 (2017)5.0km
Kellogg2,069 (2017)11.1km
Wardner186 (2017)11.4km
Mullan675 (2017)14.3km


Southeast of Osburn
Structure: Osburn Fault, 1.5 km north of Coeur shaft, N75W 60-80SW Placer Creek Fault, 3.5 km south of Coeur shaft Big Creek Anticline, north overturned limb strikes N55W, axial plunge 10 to 20 N, axial plane dips 55SW. Polaris Fault, N55W 50-75SW, cuts north limb of Big Creek anticline, a tension fracture extending from the Osburn to the Placer Creek faults. St. Elmo Fault, N50W 60SW, shows reverse movement. Mineral Point Fault Fort Wayne Fault, N60W 60-70SW, shows normal displacement. Silver Standard Fault, N60W 65SW, shows normal movement.

Tectonics: Belt Basin

Deposit: 16 of the patented claims were leased from the coeur d'alene mines corp and 22 of the patented claims were leased from the rainbo W min. And mill. Co. In 1966 ; these 2 companies merged in 1968

Deposit type: Polymetallic veins

Development: 38 PATENTED, 4 UNPATENTED CLAIMS. ABOUT 53299 FT TOTAL DIAMOND DRILLING. CALADAY CROSSCUT TO HALFWAY POINT OVER 2000 FT FROM PORTAL. ; TOTAL$: 20 ; MILL$: 10 ; MILL.CAP: 502 TPD ; ECON.YEAR: 1976 ; ECON.COM: EXPLORATION AND DEVELOPMENT WORK TOTALED $10 MILLION The Siderite vein, the main vein of the Mineral Point mining operation was discovered by Coeur d'Alene Mines Corp in 1935. The Commodore Truxton vein was discovered in 1945 and the Wire Silver vein in 1950 in the course of mine development and exploration. The first orebody in the modern Coeur mine operations was discovered in 1969 by Asarco, Inc.

Geology: St. Regis - revett transition zone extends near surface to 3700 ft level

Rock formation(s): St. Regis Formation
Revett Formation


Ore(s): Orebodies (massive siderite veins) occur in a wedge of Revett Formation quartzite in the footwall of the Polaris Fault. Revett Formation rocks have been uplifted here over 1 kilometer. Veins pinch out rapidly when they pass into argilite. Boundaries of veins at the intersection of fractures and bedding. Clean Revett Formation quartizite is the best host rock, sericitic quartzite in the St. Regis Formation is a relatively poor host rock. Mineralized fractures occupy fractures of five orientations, one parallel to the Osburn and Placer Creek Faults, and two sets of conjugate fractures related to left-lateral and right-lateral movement on the Osburn and Placer Creek Faults.

Regions containing this locality

North America PlateTectonic Plate
Rocky Mountains, North AmericaMountain Range

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

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


Mineral List


13 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Ankerite
Formula: Ca(Fe2+,Mg)(CO3)2
Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Arsenopyrite
Formula: FeAsS
Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Boulangerite
Formula: Pb5Sb4S11
Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Chalcopyrite
Formula: CuFeS2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Galena
Formula: PbS
Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Jamesonite
Formula: Pb4FeSb6S14
Reference: R&M 70:4 pp 242-263; U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Pyrite
Formula: FeS2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Quartz
Formula: SiO2
Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Siderite
Formula: FeCO3
Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Silver
Formula: Ag
Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Sphalerite
Formula: ZnS
Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Stibnite
Formula: Sb2S3
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Tetrahedrite
Formula: Cu6[Cu4(Fe,Zn)2]Sb4S13
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Econ Geol (1984) 79:448-460; U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Silver1.AA.05Ag
Group 2 - Sulphides and Sulfosalts
Arsenopyrite2.EB.20FeAsS
Boulangerite2.HC.15Pb5Sb4S11
Chalcopyrite2.CB.10aCuFeS2
Galena2.CD.10PbS
Jamesonite2.HB.15Pb4FeSb6S14
Pyrite2.EB.05aFeS2
Sphalerite2.CB.05aZnS
Stibnite2.DB.05Sb2S3
Tetrahedrite2.GB.05Cu6[Cu4(Fe,Zn)2]Sb4S13
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Ankerite5.AB.10Ca(Fe2+,Mg)(CO3)2
Siderite5.AB.05FeCO3

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Silver1.1.1.2Ag
Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 2:3
Stibnite2.11.2.1Sb2S3
AmBnXp, with (m+n):p = 1:2
Arsenopyrite2.12.4.1FeAsS
Pyrite2.12.1.1FeS2
Group 3 - SULFOSALTS
3 <ø < 4
Tetrahedrite3.3.6.1Cu6[Cu4(Fe,Zn)2]Sb4S13
2.5 < ø < 3
Boulangerite3.5.2.1Pb5Sb4S11
2 < ø < 2.49
Jamesonite3.6.7.1Pb4FeSb6S14
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Siderite14.1.1.3FeCO3
AB(XO3)2
Ankerite14.2.1.2Ca(Fe2+,Mg)(CO3)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2

List of minerals for each chemical element

CCarbon
C SideriteFeCO3
C AnkeriteCa(Fe2+,Mg)(CO3)2
OOxygen
O SideriteFeCO3
O QuartzSiO2
O AnkeriteCa(Fe2+,Mg)(CO3)2
MgMagnesium
Mg AnkeriteCa(Fe2+,Mg)(CO3)2
SiSilicon
Si QuartzSiO2
SSulfur
S JamesonitePb4FeSb6S14
S PyriteFeS2
S StibniteSb2S3
S ChalcopyriteCuFeS2
S TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
S GalenaPbS
S SphaleriteZnS
S ArsenopyriteFeAsS
S BoulangeritePb5Sb4S11
CaCalcium
Ca AnkeriteCa(Fe2+,Mg)(CO3)2
FeIron
Fe JamesonitePb4FeSb6S14
Fe PyriteFeS2
Fe ChalcopyriteCuFeS2
Fe TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
Fe SideriteFeCO3
Fe ArsenopyriteFeAsS
Fe AnkeriteCa(Fe2+,Mg)(CO3)2
CuCopper
Cu ChalcopyriteCuFeS2
Cu TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
ZnZinc
Zn TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
Zn SphaleriteZnS
AsArsenic
As ArsenopyriteFeAsS
AgSilver
Ag SilverAg
SbAntimony
Sb JamesonitePb4FeSb6S14
Sb StibniteSb2S3
Sb TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
Sb BoulangeritePb5Sb4S11
PbLead
Pb JamesonitePb4FeSb6S14
Pb GalenaPbS
Pb BoulangeritePb5Sb4S11

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Mesoproterozoic
1000 - 1600 Ma



ID: 2088579
Wallace Formation, middle and lower members, undivided

Age: Mesoproterozoic (1000 - 1600 Ma)

Stratigraphic Name: Wallace Formation

Lithology: Major:: {argillite, quartzite, green argillite}

Reference: Zientek, M.L., P.D. Derkey, R.J. Miller, J.D. Causet et al. Spatial Databases for the Geology of the Northern Rocky Mountains - Idaho, Montana, and Washington. U.S. Geological Survey Open-File Report 2005-1235 Version 1.0. [25]

Mesoproterozoic
1000 - 1600 Ma



ID: 2922354
Piegan Group

Age: Mesoproterozoic (1000 - 1600 Ma)

Stratigraphic Name: Piegan Group

Description: Calcareous and dolomitic siltite, quartzite, and subordinate argillite of the Helena and Wallace formations in northern Idaho; south of St. Joe River, correlative rocks include garnet grade feldspathic quartzite and calc-silicate gneiss. (Mesoproterozoic Belt Supergroup).

Comments: Original map source: Lewis, Reed S., Link, Paul K., Stanford, Loudon R., and Long, Sean P., Geologic Map of Idaho, 2012, Idaho Geological Survey, Geologic Map 9 (M-9); Scale 1:750,000.

Lithology: Major:{metasiltstone,quartzite}, Minor:{argillite,calc silicate gneiss}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Mesoproterozoic
1000 - 1600 Ma



ID: 3186914
Mesoproterozoic sedimentary and volcanic rocks

Age: Mesoproterozoic (1000 - 1600 Ma)

Stratigraphic Name: Purcell Group

Comments: Omineca Belt

Lithology: Mafic-intermediate volcanic rocks; limestone,shale,argillite,quartzite,dolomite,siltstone; turbidite

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
ENG. MINING JOUR., (1976) , ASARCO'S NEWLY DEDICATED COEUR SILVER MINE WILL BE FOURTH LARGEST IN US: ENG. MINING JOUR., V. 177 , NO. 7 , P. 23 - 27
CARTER, R. A., AND LI, TAM., (1976) , IDAHO'S COEUR D'ALENE DISTRICT SETS SIGHTS ON RECORD PRODUCTION: MINING ENG., V. 28 , NO. 7 , P. 49 - 64
Fryklund, V.C., Jr., (1964), Ore deposits of the Coeur d'Alene district, Shoshone County, Idaho: U.S. Geological Survey Professional Paper 445, 103 p.
Robinson, Robert Blair, (1980), Structural geology and structural origin of the veins of the Coeur mine, Coeur d'Alene mining district, Shoshone County, Idaho: Moscow, University of Idaho, MS thesis, 98 p.
Hackbarth, C.J., and Petersen, U., (1982), Zoning in veins of the Galena and Coeur mines, Coeur d'Alene mining district, Idaho: Geological Society of America Abstracts with Programs, v. 14, no. 6, p. 314.
Dahl, Mary Katherine, (1981), Structural and stratigraphic control of ore through the Crescent, Sunshine, Silver Summit, Coeur and Galena mines, Coeur d'Alene mining district, Idaho: Moscow, Univeristy of Idaho, MS thesis, 97 p.
Hobbs, S. W., And Others, (1965) , Geology Of The Coeur D'Alene District, Shoshone County, Idaho: USGS Prof. Paper 478 , 139 P.

USGS MRDS Record:10107346
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