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Bear Lodge Mining District, Crook County, Wyoming, USAi
Regional Level Types
Bear Lodge Mining DistrictMining District
Crook CountyCounty
WyomingState
USACountry

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PhotosMapsSearch
00908340017361080615104.jpg
Overview.

Bock Mine, Bear Lodge Mining District, Crook County, Wyoming, USA
06585910017361080617784.jpg
Dump View.

Lytle 5 Claim, Bear Lodge Mining District, Crook County, Wyoming, USA
03422160017361080624292.jpg
Overview

Lytle 5 Claim, Bear Lodge Mining District, Crook County, Wyoming, USA
00908340017361080615104.jpg
Overview.

Bock Mine, Bear Lodge Mining District, Crook County, Wyoming, USA
06585910017361080617784.jpg
Dump View.

Lytle 5 Claim, Bear Lodge Mining District, Crook County, Wyoming, USA
03422160017361080624292.jpg
Overview

Lytle 5 Claim, Bear Lodge Mining District, Crook County, Wyoming, USA
00908340017361080615104.jpg
Overview.

Bock Mine, Bear Lodge Mining District, Crook County, Wyoming, USA
06585910017361080617784.jpg
Dump View.

Lytle 5 Claim, Bear Lodge Mining District, Crook County, Wyoming, USA
Latitude & Longitude (WGS84):
44° North , 104° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~62km
GRN:
N30W55
Type:
Mining District
Köppen climate type:
BSk : Cold semi-arid (steppe) climate
Mindat Locality ID:
7172
Long-form identifier:
mindat:1:2:7172:0
GUID (UUID V4):
0


10 miles N of Sundance (T. 51-52 N., R. 63 W.), includes Petersen deposits (secs. 15 & 22, T. 52 N., R. 63 W.), Hutchinson prospect, and Royal Purple Nos. 1 & 2 claims (sec. 30, T. 52 N., R. 63 W. & sec. 25, T. 52 N., R. 64 W.); siliceous fluorite veins and limestone replacement associated with andesite sills intruded into limestone.
The REE-thorium deposits and nearby gold mineralization of the southern Bear Lodge Mountains are hosted by middle Tertiary alkaline intrusions. These intrusions are Eocene (38.3−50 million years old) and consist primarily of phonolite and trachyte (Staatz, 1983). They intruded Paleozoic and Mesozoic sedimentary rocks, forming a dome about 13 km (8 mi) long by 10 km (6 mi) wide. Breccia bodies are associated with the igneous intrusions, such as a heterolithic diatreme breccia near Bull Hill. Rare earth elements–bearing carbonatite dikes intruded near the Bull Hill diatreme; the dikes are surrounded by a large zone of low-grade REE mineralization that fills thin, narrow stockwork fractures within the large alkaline intrusions. These thorium and REE deposits crop out throughout an area of about 16 km2 (6 mi2) (Staatz, 1983). The igneous core of the dome is microfractured and altered, thereby forming disseminated deposits. The REE and thorium mineralization precipitated within thin fractures as coatings and veinlets as much as 6 mm thick. The coatings and veinlets consist predominantly of iron and manganese oxide minerals, along with potassium feldspar and quartz. The REE and thorium are incorporated into the minerals monazite, thorite, and brockite.

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Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

Mineral list contains entries from the region specified including sub-localities

25 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Rock list contains entries from the region specified including sub-localities

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Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ 'Ancylite'
ⓘ Ancylite-(Ce)
Formula: CeSr(CO3)2(OH) · H2O
ⓘ 'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
ⓘ Baryte
Formula: BaSO4
ⓘ 'Bastnäsite'
Formula: (Ce/Nd/Y/REE)(CO3)F
ⓘ Brockite
Formula: (Ca,Th,Ce)PO4 · H2O
ⓘ Burbankite
Formula: (Na,Ca)3(Sr,Ba,Ce)3(CO3)5
ⓘ 'Calcioancylite'
ⓘ Calcite
Formula: CaCO3
ⓘ Carbocernaite
Formula: (Ca,Na)(Sr,Ce,Ba)(CO3)2
ⓘ Cerianite-(Ce)
Formula: (Ce4+,Th)O2
ⓘ Fluorapatite
Formula: Ca5(PO4)3F
ⓘ Fluorite
Formula: CaF2
ⓘ Galena
Formula: PbS
ⓘ Goethite
Formula: Fe3+O(OH)
References:
Frank KarastiIdentified by Frank Karasti: Visual Identification, Optical Analysis
ⓘ Gypsum
Formula: CaSO4 · 2H2O
ⓘ Hematite
Formula: Fe2O3
ⓘ Jarosite
Formula: KFe3+3(SO4)2(OH)6
ⓘ 'K Feldspar'
ⓘ 'Limonite'
ⓘ Marcasite
Formula: FeS2
ⓘ 'Monazite Group'
Formula: REE(PO4)
ⓘ Native Gold
Formula: Au
Description: Native
ⓘ Opal
Formula: SiO2 · nH2O
References:
Frank KarastiIdentified by Frank Karasti: Visual Identification, Optical Analysis
ⓘ Opal var. Hyalite
Formula: SiO2 · nH2O
References:
Frank KarastiIdentified by Frank Karasti: Visual Identification, Optical Analysis
ⓘ 'Parisite'
Formula: Ca(Ce/La/Nd/REE)2(CO3)3F2
ⓘ Pseudorutile
Formula: Fe2Ti3O9
ⓘ 'Psilomelane'
ⓘ Pyrite
Formula: FeS2
ⓘ Pyrolusite
Formula: Mn4+O2
ⓘ Quartz
Formula: SiO2
ⓘ 'Rhabdophane'
ⓘ Rutile
Formula: TiO2
ⓘ Siderite
Formula: FeCO3
ⓘ Strontianite
Formula: SrCO3
ⓘ 'Synchysite'
Formula: Ca(Ce/Nd/Y/REE)(CO3)2F
ⓘ Thorite
Formula: Th(SiO4)
ⓘ 'Wad'

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
ⓘGalena2.CD.10PbS
ⓘPyrite2.EB.05aFeS2
ⓘMarcasite2.EB.10aFeS2
Group 3 - Halides
ⓘFluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
ⓘGoethite4.00.Fe3+O(OH)
ⓘHematite4.CB.05Fe2O3
ⓘPseudorutile4.CB.25Fe2Ti3O9
ⓘQuartz4.DA.05SiO2
ⓘOpal4.DA.10SiO2 · nH2O
ⓘvar. Hyalite4.DA.10SiO2 · nH2O
ⓘPyrolusite4.DB.05Mn4+O2
ⓘRutile4.DB.05TiO2
ⓘCerianite-(Ce)4.DL.05(Ce4+,Th)O2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘSiderite5.AB.05FeCO3
ⓘStrontianite5.AB.15SrCO3
ⓘCarbocernaite5.AB.50(Ca,Na)(Sr,Ce,Ba)(CO3)2
ⓘBurbankite5.AC.30(Na,Ca)3(Sr,Ba,Ce)3(CO3)5
ⓘAncylite-(Ce)5.DC.05CeSr(CO3)2(OH) · H2O
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘBaryte7.AD.35BaSO4
ⓘJarosite7.BC.10KFe3+3(SO4)2(OH)6
ⓘGypsum7.CD.40CaSO4 · 2H2O
Group 8 - Phosphates, Arsenates and Vanadates
ⓘFluorapatite8.BN.05Ca5(PO4)3F
ⓘBrockite8.CJ.45(Ca,Th,Ce)PO4 · H2O
Group 9 - Silicates
ⓘThorite9.AD.30Th(SiO4)
Unclassified
ⓘ'Bastnäsite'-(Ce/Nd/Y/REE)(CO3)F
ⓘ'Limonite'-
ⓘ'Monazite Group'-REE(PO4)
ⓘ'Psilomelane'-
ⓘ'Rhabdophane'-
ⓘ'Wad'-
ⓘ'Parisite'-Ca(Ce/La/Nd/REE)2(CO3)3F2
ⓘ'Synchysite'-Ca(Ce/Nd/Y/REE)(CO3)2F
ⓘ'Ancylite'-
ⓘ'K Feldspar'-
ⓘ'Calcioancylite'-
ⓘ'Apatite'-Ca5(PO4)3(Cl/F/OH)

List of minerals for each chemical element

HHydrogen
Hⓘ Ancylite-(Ce)CeSr(CO3)2(OH) · H2O
Hⓘ Brockite(Ca,Th,Ce)PO4 · H2O
Hⓘ GoethiteFe3+O(OH)
Hⓘ GypsumCaSO4 · 2H2O
Hⓘ JarositeKFe33+(SO4)2(OH)6
Hⓘ OpalSiO2 · nH2O
Hⓘ ApatiteCa5(PO4)3(Cl/F/OH)
Hⓘ Opal var. HyaliteSiO2 · nH2O
CCarbon
Cⓘ Ancylite-(Ce)CeSr(CO3)2(OH) · H2O
Cⓘ Bastnäsite(Ce/Nd/Y/REE)(CO3)F
Cⓘ Burbankite(Na,Ca)3(Sr,Ba,Ce)3(CO3)5
Cⓘ CalciteCaCO3
Cⓘ Carbocernaite(Ca,Na)(Sr,Ce,Ba)(CO3)2
Cⓘ SideriteFeCO3
Cⓘ StrontianiteSrCO3
Cⓘ ParisiteCa(Ce/La/Nd/REE)2(CO3)3F2
Cⓘ SynchysiteCa(Ce/Nd/Y/REE)(CO3)2F
OOxygen
Oⓘ Ancylite-(Ce)CeSr(CO3)2(OH) · H2O
Oⓘ BaryteBaSO4
Oⓘ Bastnäsite(Ce/Nd/Y/REE)(CO3)F
Oⓘ Brockite(Ca,Th,Ce)PO4 · H2O
Oⓘ Burbankite(Na,Ca)3(Sr,Ba,Ce)3(CO3)5
Oⓘ CalciteCaCO3
Oⓘ Carbocernaite(Ca,Na)(Sr,Ce,Ba)(CO3)2
Oⓘ Cerianite-(Ce)(Ce4+,Th)O2
Oⓘ FluorapatiteCa5(PO4)3F
Oⓘ GoethiteFe3+O(OH)
Oⓘ GypsumCaSO4 · 2H2O
Oⓘ HematiteFe2O3
Oⓘ JarositeKFe33+(SO4)2(OH)6
Oⓘ Monazite GroupREE(PO4)
Oⓘ OpalSiO2 · nH2O
Oⓘ PseudorutileFe2Ti3O9
Oⓘ PyrolusiteMn4+O2
Oⓘ QuartzSiO2
Oⓘ RutileTiO2
Oⓘ SideriteFeCO3
Oⓘ StrontianiteSrCO3
Oⓘ ThoriteTh(SiO4)
Oⓘ ParisiteCa(Ce/La/Nd/REE)2(CO3)3F2
Oⓘ SynchysiteCa(Ce/Nd/Y/REE)(CO3)2F
Oⓘ ApatiteCa5(PO4)3(Cl/F/OH)
Oⓘ Opal var. HyaliteSiO2 · nH2O
FFluorine
Fⓘ Bastnäsite(Ce/Nd/Y/REE)(CO3)F
Fⓘ FluorapatiteCa5(PO4)3F
Fⓘ FluoriteCaF2
Fⓘ ParisiteCa(Ce/La/Nd/REE)2(CO3)3F2
Fⓘ SynchysiteCa(Ce/Nd/Y/REE)(CO3)2F
Fⓘ ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Naⓘ Burbankite(Na,Ca)3(Sr,Ba,Ce)3(CO3)5
Naⓘ Carbocernaite(Ca,Na)(Sr,Ce,Ba)(CO3)2
SiSilicon
Siⓘ OpalSiO2 · nH2O
Siⓘ QuartzSiO2
Siⓘ ThoriteTh(SiO4)
Siⓘ Opal var. HyaliteSiO2 · nH2O
PPhosphorus
Pⓘ Brockite(Ca,Th,Ce)PO4 · H2O
Pⓘ FluorapatiteCa5(PO4)3F
Pⓘ Monazite GroupREE(PO4)
Pⓘ ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
Sⓘ BaryteBaSO4
Sⓘ GalenaPbS
Sⓘ GypsumCaSO4 · 2H2O
Sⓘ JarositeKFe33+(SO4)2(OH)6
Sⓘ MarcasiteFeS2
Sⓘ PyriteFeS2
ClChlorine
Clⓘ ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
Kⓘ JarositeKFe33+(SO4)2(OH)6
CaCalcium
Caⓘ Brockite(Ca,Th,Ce)PO4 · H2O
Caⓘ Burbankite(Na,Ca)3(Sr,Ba,Ce)3(CO3)5
Caⓘ CalciteCaCO3
Caⓘ Carbocernaite(Ca,Na)(Sr,Ce,Ba)(CO3)2
Caⓘ FluorapatiteCa5(PO4)3F
Caⓘ FluoriteCaF2
Caⓘ GypsumCaSO4 · 2H2O
Caⓘ ParisiteCa(Ce/La/Nd/REE)2(CO3)3F2
Caⓘ SynchysiteCa(Ce/Nd/Y/REE)(CO3)2F
Caⓘ ApatiteCa5(PO4)3(Cl/F/OH)
TiTitanium
Tiⓘ PseudorutileFe2Ti3O9
Tiⓘ RutileTiO2
MnManganese
Mnⓘ PyrolusiteMn4+O2
FeIron
Feⓘ GoethiteFe3+O(OH)
Feⓘ HematiteFe2O3
Feⓘ JarositeKFe33+(SO4)2(OH)6
Feⓘ MarcasiteFeS2
Feⓘ PseudorutileFe2Ti3O9
Feⓘ PyriteFeS2
Feⓘ SideriteFeCO3
SrStrontium
Srⓘ Ancylite-(Ce)CeSr(CO3)2(OH) · H2O
Srⓘ Burbankite(Na,Ca)3(Sr,Ba,Ce)3(CO3)5
Srⓘ Carbocernaite(Ca,Na)(Sr,Ce,Ba)(CO3)2
Srⓘ StrontianiteSrCO3
YYttrium
Yⓘ Bastnäsite(Ce/Nd/Y/REE)(CO3)F
Yⓘ SynchysiteCa(Ce/Nd/Y/REE)(CO3)2F
BaBarium
Baⓘ BaryteBaSO4
Baⓘ Burbankite(Na,Ca)3(Sr,Ba,Ce)3(CO3)5
Baⓘ Carbocernaite(Ca,Na)(Sr,Ce,Ba)(CO3)2
LaLanthanum
Laⓘ ParisiteCa(Ce/La/Nd/REE)2(CO3)3F2
CeCerium
Ceⓘ Ancylite-(Ce)CeSr(CO3)2(OH) · H2O
Ceⓘ Bastnäsite(Ce/Nd/Y/REE)(CO3)F
Ceⓘ Brockite(Ca,Th,Ce)PO4 · H2O
Ceⓘ Burbankite(Na,Ca)3(Sr,Ba,Ce)3(CO3)5
Ceⓘ Carbocernaite(Ca,Na)(Sr,Ce,Ba)(CO3)2
Ceⓘ Cerianite-(Ce)(Ce4+,Th)O2
Ceⓘ ParisiteCa(Ce/La/Nd/REE)2(CO3)3F2
Ceⓘ SynchysiteCa(Ce/Nd/Y/REE)(CO3)2F
NdNeodymium
Ndⓘ Bastnäsite(Ce/Nd/Y/REE)(CO3)F
Ndⓘ ParisiteCa(Ce/La/Nd/REE)2(CO3)3F2
Ndⓘ SynchysiteCa(Ce/Nd/Y/REE)(CO3)2F
AuGold
Auⓘ Native GoldAu
PbLead
Pbⓘ GalenaPbS
ThThorium
Thⓘ Brockite(Ca,Th,Ce)PO4 · H2O
Thⓘ Cerianite-(Ce)(Ce4+,Th)O2
Thⓘ ThoriteTh(SiO4)

Localities in this Region

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USA

Other Regions, Features and Areas containing this locality

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North America PlateTectonic Plate

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, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

USGS Open File report 2010-5220
Hausel, W. Dan, Jacobson, Mark (2001) Wyoming Mineral Locality Index. Rocks & Minerals, 76 (6) 380-393 doi:10.1080/00357520109603245p.385
Andersen, Allen K.; Clark, James G.; Larson, Peter B.; Donovan, John J. (2017) REE fractionation, mineral speciation, and supergene enrichment of the Bear Lodge carbonatites, Wyoming, USA. Ore Geology Reviews, 89. doi:10.1016/j.oregeorev.2017.06.025
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