Log InRegister
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreOur ScienceMindat Newsletter [Free Download]Contact Us
Donate to MindatSponsor a PageCorporate SponsorshipSponsored Pages
Learning CenterWhat Is a Mineral?The Most Common Minerals on EarthInformation for EducatorsMindat ArticlesMindat Newsletter [Free Download]The ElementsThe Mineral Quiz
Search FormMinerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDMinerals by CountryAlphabetical Mineral IndexAlphabetical Locality SearchMineral Association SearchList of CountriesLocalities Near MePhoto SearchSearch ArticlesSearch GlossaryThe Rock H. Currier Digital LibraryMore Search Options
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
MineralsPetrologyFossilsMeteoritesGeologic Time
Mining CompaniesStatisticsMineral MuseumsClubs & OrganizationsMineral Shows & EventsDevice SettingsTime Machine
Read DiscussionsIdentification Request
Photo SearchPhoto GalleriesSearch by ColourPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Cotopaxi Mining District, Fremont County, Colorado, USAi
Regional Level Types
Cotopaxi Mining DistrictMining District
Fremont CountyCounty
ColoradoState
USACountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearchMineralogy
00803550017272022844933.jpg
Geological Map

Cotopaxi Feldspar Mine, Cotopaxi Pegmatite area, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA
00878420017272022845688.jpg
view of mine shaft

Cotopaxi Mine, Mine Gulch, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA
04022910017272022852933.jpg
view of the mine entrance

Cotopaxi Mine, Mine Gulch, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA
00803550017272022844933.jpg
Geological Map

Cotopaxi Feldspar Mine, Cotopaxi Pegmatite area, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA
00878420017272022845688.jpg
view of mine shaft

Cotopaxi Mine, Mine Gulch, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA
04022910017272022852933.jpg
view of the mine entrance

Cotopaxi Mine, Mine Gulch, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA
09214460017272022911910.jpg
Geological Map

Cotopaxi Feldspar Mine, Cotopaxi Pegmatite area, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA
00878420017272022845688.jpg
view of mine shaft

Cotopaxi Mine, Mine Gulch, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA
Latitude & Longitude (WGS84):
38° 22' 55'' North , 105° 41' 43'' West
Latitude & Longitude (decimal):
38.38195,-105.69530
GRN:
N26W60
Type:
Mining District
Köppen climate type:
BSk : Cold semi-arid (steppe) climate
Mindat Locality ID:
112943
Long-form identifier:
mindat:1:2:112943:7
GUID (UUID V4):
0


A Zn-Cu-Ag-Au-Pb mining district located in secs. 07, 08, 17, 18 & 25, T48N, R12E and in T48N, R11E, NMM, near Cotopaxi, on Bureau of Land Management administered land. NOTE: locational point is near Cotopaxi Mine, which is 0.5 mile NW of the small town of Cotopaxi on the Arkansas River. Two smaller Proterozoic base-metal sulfide occurrences, the Sand Gulch No. 2 and the Carson Mining Company prospect, are located in similar rocks about 3 miles NNE of the Cotopaxi Mine.

Mineralization is hosted in biotite gneiss and skarn (tactite). Controls for ore emplacement included leucocratic lenses within host rock. Local rocks include Granitic rocks of 1700-m.y. age group.

Related Tectonic Structures: Central Colorado (Southern Rocky Mountains).

Select Mineral List Type

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

62 valid minerals. 1 erroneous literature entry.

Rock Types Recorded


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

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Actinolite
Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
ⓘ Albite
Formula: Na(AlSi3O8)
ⓘ Albite var. Oligoclase
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
ⓘ Allanite-(Ce)
Formula: (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
ⓘ 'Allanite Group'
Formula: (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
ⓘ Almandine
Formula: Fe2+3Al2(SiO4)3
ⓘ Amesite
Formula: Mg2Al(AlSiO5)(OH)4
ⓘ Anglesite
Formula: PbSO4
ⓘ Anorthite
Formula: Ca(Al2Si2O8)
ⓘ Anorthite var. Labradorite
Formula: (Ca,Na)[Al(Al,Si)Si2O8]
ⓘ Anthophyllite
Formula: ◻Mg2Mg5(Si8O22)(OH)2
ⓘ 'Apatite'
Formula: Ca5(PO4)3A
ⓘ Azurite
Formula: Cu3(CO3)2(OH)2
ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Localities: Reported from at least 9 localities in this region.
ⓘ Calcite
Formula: CaCO3
ⓘ Chalcopyrite
Formula: CuFeS2
ⓘ 'Chlorite Group'
ⓘ Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
ⓘ Clinohumite
Formula: Mg9(SiO4)4F2
ⓘ Clinozoisite
Formula: (CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
ⓘ 'Columbite-(Fe)-Columbite-(Mn) Series'
ⓘ Cordierite
Formula: Mg2Al4Si5O18
ⓘ Covellite
Formula: CuS
ⓘ Cummingtonite
Formula: ◻Mg2Mg5(Si8O22)(OH)2
ⓘ Cuprite
Formula: Cu2O
ⓘ Diopside
Formula: CaMgSi2O6
ⓘ Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ⓘ Euxenite-(Y)
Formula: (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
ⓘ 'Feldspar Group'
ⓘ Fluorite
Formula: CaF2
ⓘ Forsterite
Formula: Mg2(SiO4)
ⓘ 'Gadolinite'
ⓘ Gadolinite-(Y)
Formula: Y2Fe2+Be2Si2O10
ⓘ Gahnite
Formula: ZnAl2O4
ⓘ Galena
Formula: PbS
ⓘ 'Garnet Group'
Formula: X3Z2(SiO4)3
ⓘ Goethite
Formula: Fe3+O(OH)
ⓘ Gypsum
Formula: CaSO4 · 2H2O
ⓘ Hematite
Formula: Fe2O3
ⓘ 'Hornblende Root Name Group'
Formula: ◻Ca2(C2+4C3+)(AlSi7O22)W2
Localities: Reported from at least 6 localities in this region.
ⓘ Ilmenite
Formula: Fe2+TiO3
ⓘ Kainosite-(Y)
Formula: Ca2Y2(SiO3)4(CO3) · H2O
ⓘ Kaolinite
Formula: Al2(Si2O5)(OH)4
ⓘ 'K Feldspar'
ⓘ 'Leucoxene'
ⓘ 'Limonite'
ⓘ Linarite
Formula: PbCu(SO4)(OH)2
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
Localities: Reported from at least 7 localities in this region.
ⓘ Malachite
Formula: Cu2(CO3)(OH)2
ⓘ Marcasite
Formula: FeS2
ⓘ 'Mica Group'
ⓘ Microcline
Formula: K(AlSi3O8)
Localities: Reported from at least 13 localities in this region.
ⓘ Microcline var. Amazonite
Formula: K(AlSi3O8)
ⓘ Molybdenite
Formula: MoS2
ⓘ Monazite-(Ce)
Formula: Ce(PO4)
Description: Reidentified as crytolite
ⓘ 'Monazite Group'
Formula: REE(PO4)
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Localities: Reported from at least 9 localities in this region.
ⓘ Muscovite var. Sericite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Native Copper
Formula: Cu
ⓘ Native Gold
Formula: Au
ⓘ Native Silver
Formula: Ag
ⓘ Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
ⓘ 'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
ⓘ Pyrite
Formula: FeS2
ⓘ Pyrrhotite
Formula: Fe1-xS
ⓘ Quartz
Formula: SiO2
Localities: Reported from at least 14 localities in this region.
ⓘ Rutile
Formula: TiO2
ⓘ Samarskite-(Y)
Formula: YFe3+Nb2O8
ⓘ 'Scapolite'
ⓘ Scheelite
Formula: Ca(WO4)
ⓘ Schorl
Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
ⓘ 'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4
ⓘ Siderite
Formula: FeCO3
ⓘ Sillimanite
Formula: Al2(SiO4)O
ⓘ Sphalerite
Formula: ZnS
ⓘ Strontianite
Formula: SrCO3
ⓘ Synchysite-(Y)
Formula: CaY(CO3)2F
ⓘ 'Tetrahedrite Subgroup'
Formula: Cu6(Cu4C2+2)Sb4S12S
ⓘ Titanite
Formula: CaTiO(SiO4)
ⓘ 'Tourmaline'
Formula: AD3G6(T6O18)(BO3)3X3Z
ⓘ Tremolite
Formula: ◻Ca2Mg5(Si8O22)(OH)2
ⓘ Trilithionite
Formula: K(Li1.5Al1.5)(AlSi3O10)(F,OH)2
ⓘ Uraninite
Formula: UO2
ⓘ 'Xenotime'
ⓘ Xenotime-(Y)
Formula: Y(PO4)
ⓘ Zircon
Formula: Zr(SiO4)
ⓘ Zircon var. Cyrtolite
Formula: Zr[(SiO4),(OH)4]
ⓘ Zoisite
Formula: (CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
ⓘ Zoisite var. Thulite
Formula: {Ca2}{Al,Mn3+3}(Si2O7)(SiO4)O(OH)

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Copper1.AA.05Cu
ⓘNative Gold1.AA.05Au
ⓘNative Silver1.AA.05Ag
Group 2 - Sulphides and Sulfosalts
ⓘCovellite2.CA.05aCuS
ⓘSphalerite2.CB.05aZnS
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘPyrrhotite2.CC.10Fe1-xS
ⓘGalena2.CD.10PbS
ⓘMolybdenite2.EA.30MoS2
ⓘPyrite2.EB.05aFeS2
ⓘMarcasite2.EB.10aFeS2
ⓘ'Tetrahedrite Subgroup'2.GB.05Cu6(Cu4C2+2)Sb4S12S
Group 3 - Halides
ⓘFluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
ⓘGoethite4.00.Fe3+O(OH)
ⓘCuprite4.AA.10Cu2O
ⓘGahnite4.BB.05ZnAl2O4
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
ⓘHematite4.CB.05Fe2O3
ⓘIlmenite4.CB.05Fe2+TiO3
ⓘQuartz4.DA.05SiO2
ⓘRutile4.DB.05TiO2
ⓘSamarskite-(Y)4.DB.25YFe3+Nb2O8
ⓘEuxenite-(Y)4.DG.05(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
ⓘUraninite4.DL.05UO2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘSiderite5.AB.05FeCO3
ⓘStrontianite5.AB.15SrCO3
ⓘAzurite5.BA.05Cu3(CO3)2(OH)2
ⓘMalachite5.BA.10Cu2(CO3)(OH)2
ⓘSynchysite-(Y)5.BD.20cCaY(CO3)2F
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘAnglesite7.AD.35PbSO4
ⓘLinarite7.BC.65PbCu(SO4)(OH)2
ⓘGypsum7.CD.40CaSO4 · 2H2O
ⓘScheelite7.GA.05Ca(WO4)
Group 8 - Phosphates, Arsenates and Vanadates
ⓘXenotime-(Y)8.AD.35Y(PO4)
ⓘMonazite-(Ce) ?8.AD.50Ce(PO4)
Group 9 - Silicates
ⓘForsterite9.AC.05Mg2(SiO4)
ⓘAlmandine9.AD.25Fe2+3Al2(SiO4)3
ⓘZircon9.AD.30Zr(SiO4)
ⓘvar. Cyrtolite9.AD.30Zr[(SiO4),(OH)4]
ⓘSillimanite9.AF.05Al2(SiO4)O
ⓘClinohumite9.AF.55Mg9(SiO4)4F2
ⓘTitanite9.AG.15CaTiO(SiO4)
ⓘGadolinite-(Y)9.AJ.20Y2Fe2+Be2Si2O10
ⓘClinozoisite9.BG.05a(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
ⓘEpidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ⓘAllanite-(Ce)9.BG.05b(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
ⓘZoisite
var. Thulite		9.BG.10{Ca2}{Al,Mn3+3}(Si2O7)(SiO4)O(OH)
ⓘ9.BG.10(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
ⓘKainosite-(Y)9.CF.10Ca2Y2(SiO3)4(CO3) · H2O
ⓘCordierite9.CJ.10Mg2Al4Si5O18
ⓘSchorl9.CK.05NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
ⓘDiopside9.DA.15CaMgSi2O6
ⓘAnthophyllite9.DD.05◻Mg2Mg5(Si8O22)(OH)2
ⓘCummingtonite9.DE.05◻Mg2Mg5(Si8O22)(OH)2
ⓘActinolite9.DE.10◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
ⓘTremolite9.DE.10◻Ca2Mg5(Si8O22)(OH)2
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘvar. Sericite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘPhlogopite9.EC.20KMg3(AlSi3O10)(OH)2
ⓘTrilithionite9.EC.20K(Li1.5Al1.5)(AlSi3O10)(F,OH)2
ⓘKaolinite9.ED.05Al2(Si2O5)(OH)4
ⓘAmesite9.ED.15Mg2Al(AlSiO5)(OH)4
ⓘChrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
ⓘMicrocline
var. Amazonite		9.FA.30K(AlSi3O8)
ⓘ9.FA.30K(AlSi3O8)
ⓘAlbite9.FA.35Na(AlSi3O8)
ⓘAnorthite9.FA.35Ca(Al2Si2O8)
ⓘvar. Labradorite9.FA.35(Ca,Na)[Al(Al,Si)Si2O8]
ⓘAlbite
var. Oligoclase		9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
Unclassified
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ'Chlorite Group'-
ⓘ'Feldspar Group'-
ⓘ'Limonite'-
ⓘ'Monazite Group'-REE(PO4)
ⓘ'Tourmaline'-AD3G6(T6O18)(BO3)3X3Z
ⓘ'Leucoxene'-
ⓘ'Xenotime'-
ⓘ'Mica Group'-
ⓘ'Columbite-(Fe)-Columbite-(Mn) Series'-
ⓘ'Scapolite'-
ⓘ'Hornblende Root Name Group'-◻Ca2(C2+4C3+)(AlSi7O22)W2
ⓘ'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8
ⓘ'K Feldspar'-
ⓘ'Garnet Group'-X3Z2(SiO4)3
ⓘ'Gadolinite'-
ⓘ'Serpentine Subgroup'-D3[Si2O5](OH)4
ⓘ'Apatite'-Ca5(PO4)3A
ⓘ'Allanite Group'-(A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)

List of minerals for each chemical element

HHydrogen
Hⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Hⓘ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Hⓘ AmesiteMg2Al(AlSiO5)(OH)4
Hⓘ Anthophyllite◻Mg2Mg5(Si8O22)(OH)2
Hⓘ AzuriteCu3(CO3)2(OH)2
Hⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Hⓘ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Hⓘ Cummingtonite◻Mg2Mg5(Si8O22)(OH)2
Hⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Hⓘ GoethiteFe3+O(OH)
Hⓘ GypsumCaSO4 · 2H2O
Hⓘ Kainosite-(Y)Ca2Y2(SiO3)4(CO3) · H2O
Hⓘ KaoliniteAl2(Si2O5)(OH)4
Hⓘ LinaritePbCu(SO4)(OH)2
Hⓘ MalachiteCu2(CO3)(OH)2
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Hⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Hⓘ Zoisite var. Thulite{Ca2}{Al,Mn33+}(Si2O7)(SiO4)O(OH)
Hⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Hⓘ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Hⓘ TrilithioniteK(Li1.5Al1.5)(AlSi3O10)(F,OH)2
Hⓘ Zircon var. CyrtoliteZr[(SiO4),(OH)4]
Hⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Hⓘ Serpentine SubgroupD3[Si2O5](OH)4
Hⓘ Allanite Group(A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
LiLithium
Liⓘ TrilithioniteK(Li1.5Al1.5)(AlSi3O10)(F,OH)2
BeBeryllium
Beⓘ Gadolinite-(Y)Y2Fe2+Be2Si2O10
BBoron
Bⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Bⓘ TourmalineAD3G6(T6O18)(BO3)3X3Z
CCarbon
Cⓘ AzuriteCu3(CO3)2(OH)2
Cⓘ CalciteCaCO3
Cⓘ Kainosite-(Y)Ca2Y2(SiO3)4(CO3) · H2O
Cⓘ MalachiteCu2(CO3)(OH)2
Cⓘ SideriteFeCO3
Cⓘ StrontianiteSrCO3
Cⓘ Synchysite-(Y)CaY(CO3)2F
OOxygen
Oⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Oⓘ Microcline var. AmazoniteK(AlSi3O8)
Oⓘ AmesiteMg2Al(AlSiO5)(OH)4
Oⓘ AnglesitePbSO4
Oⓘ AnorthiteCa(Al2Si2O8)
Oⓘ Anthophyllite◻Mg2Mg5(Si8O22)(OH)2
Oⓘ AzuriteCu3(CO3)2(OH)2
Oⓘ AlmandineFe32+Al2(SiO4)3
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ CalciteCaCO3
Oⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Oⓘ ClinohumiteMg9(SiO4)4F2
Oⓘ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Oⓘ CordieriteMg2Al4Si5O18
Oⓘ Cummingtonite◻Mg2Mg5(Si8O22)(OH)2
Oⓘ CupriteCu2O
Oⓘ DiopsideCaMgSi2O6
Oⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Oⓘ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Oⓘ ForsteriteMg2(SiO4)
Oⓘ Gadolinite-(Y)Y2Fe2+Be2Si2O10
Oⓘ GahniteZnAl2O4
Oⓘ GoethiteFe3+O(OH)
Oⓘ GypsumCaSO4 · 2H2O
Oⓘ HematiteFe2O3
Oⓘ IlmeniteFe2+TiO3
Oⓘ Kainosite-(Y)Ca2Y2(SiO3)4(CO3) · H2O
Oⓘ KaoliniteAl2(Si2O5)(OH)4
Oⓘ Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Oⓘ LinaritePbCu(SO4)(OH)2
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ MalachiteCu2(CO3)(OH)2
Oⓘ MicroclineK(AlSi3O8)
Oⓘ Monazite GroupREE(PO4)
Oⓘ Monazite-(Ce)Ce(PO4)
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Oⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Oⓘ QuartzSiO2
Oⓘ RutileTiO2
Oⓘ Samarskite-(Y)YFe3+Nb2O8
Oⓘ ScheeliteCa(WO4)
Oⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Oⓘ SideriteFeCO3
Oⓘ SillimaniteAl2(SiO4)O
Oⓘ StrontianiteSrCO3
Oⓘ Synchysite-(Y)CaY(CO3)2F
Oⓘ Zoisite var. Thulite{Ca2}{Al,Mn33+}(Si2O7)(SiO4)O(OH)
Oⓘ TitaniteCaTiO(SiO4)
Oⓘ TourmalineAD3G6(T6O18)(BO3)3X3Z
Oⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Oⓘ UraniniteUO2
Oⓘ Xenotime-(Y)Y(PO4)
Oⓘ ZirconZr(SiO4)
Oⓘ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Oⓘ TrilithioniteK(Li1.5Al1.5)(AlSi3O10)(F,OH)2
Oⓘ Zircon var. CyrtoliteZr[(SiO4),(OH)4]
Oⓘ Columbite-(Fe)-Columbite-(Mn) Series
Oⓘ Hornblende Root Name Group◻Ca2(C42+C3+)(AlSi7O22)W2
Oⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Oⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Oⓘ Garnet GroupX3Z2(SiO4)3
Oⓘ Serpentine SubgroupD3[Si2O5](OH)4
Oⓘ ApatiteCa5(PO4)3A
Oⓘ Allanite Group(A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
FFluorine
Fⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Fⓘ ClinohumiteMg9(SiO4)4F2
Fⓘ FluoriteCaF2
Fⓘ Synchysite-(Y)CaY(CO3)2F
Fⓘ TrilithioniteK(Li1.5Al1.5)(AlSi3O10)(F,OH)2
NaSodium
Naⓘ AlbiteNa(AlSi3O8)
Naⓘ Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Naⓘ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Naⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Naⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
MgMagnesium
Mgⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Mgⓘ AmesiteMg2Al(AlSiO5)(OH)4
Mgⓘ Anthophyllite◻Mg2Mg5(Si8O22)(OH)2
Mgⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mgⓘ ClinohumiteMg9(SiO4)4F2
Mgⓘ CordieriteMg2Al4Si5O18
Mgⓘ Cummingtonite◻Mg2Mg5(Si8O22)(OH)2
Mgⓘ DiopsideCaMgSi2O6
Mgⓘ ForsteriteMg2(SiO4)
Mgⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Mgⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
AlAluminium
Alⓘ AlbiteNa(AlSi3O8)
Alⓘ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Alⓘ Microcline var. AmazoniteK(AlSi3O8)
Alⓘ AmesiteMg2Al(AlSiO5)(OH)4
Alⓘ AnorthiteCa(Al2Si2O8)
Alⓘ AlmandineFe32+Al2(SiO4)3
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Alⓘ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Alⓘ CordieriteMg2Al4Si5O18
Alⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Alⓘ GahniteZnAl2O4
Alⓘ KaoliniteAl2(Si2O5)(OH)4
Alⓘ Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Alⓘ MicroclineK(AlSi3O8)
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Alⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Alⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Alⓘ SillimaniteAl2(SiO4)O
Alⓘ Zoisite var. Thulite{Ca2}{Al,Mn33+}(Si2O7)(SiO4)O(OH)
Alⓘ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Alⓘ TrilithioniteK(Li1.5Al1.5)(AlSi3O10)(F,OH)2
Alⓘ Hornblende Root Name Group◻Ca2(C42+C3+)(AlSi7O22)W2
Alⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Alⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiSilicon
Siⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Siⓘ AlbiteNa(AlSi3O8)
Siⓘ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Siⓘ Microcline var. AmazoniteK(AlSi3O8)
Siⓘ AmesiteMg2Al(AlSiO5)(OH)4
Siⓘ AnorthiteCa(Al2Si2O8)
Siⓘ Anthophyllite◻Mg2Mg5(Si8O22)(OH)2
Siⓘ AlmandineFe32+Al2(SiO4)3
Siⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Siⓘ ClinohumiteMg9(SiO4)4F2
Siⓘ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Siⓘ CordieriteMg2Al4Si5O18
Siⓘ Cummingtonite◻Mg2Mg5(Si8O22)(OH)2
Siⓘ DiopsideCaMgSi2O6
Siⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Siⓘ ForsteriteMg2(SiO4)
Siⓘ Gadolinite-(Y)Y2Fe2+Be2Si2O10
Siⓘ Kainosite-(Y)Ca2Y2(SiO3)4(CO3) · H2O
Siⓘ KaoliniteAl2(Si2O5)(OH)4
Siⓘ Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Siⓘ MicroclineK(AlSi3O8)
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Siⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Siⓘ QuartzSiO2
Siⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Siⓘ SillimaniteAl2(SiO4)O
Siⓘ Zoisite var. Thulite{Ca2}{Al,Mn33+}(Si2O7)(SiO4)O(OH)
Siⓘ TitaniteCaTiO(SiO4)
Siⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Siⓘ ZirconZr(SiO4)
Siⓘ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Siⓘ TrilithioniteK(Li1.5Al1.5)(AlSi3O10)(F,OH)2
Siⓘ Zircon var. CyrtoliteZr[(SiO4),(OH)4]
Siⓘ Hornblende Root Name Group◻Ca2(C42+C3+)(AlSi7O22)W2
Siⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Siⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Siⓘ Garnet GroupX3Z2(SiO4)3
Siⓘ Serpentine SubgroupD3[Si2O5](OH)4
Siⓘ Allanite Group(A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
PPhosphorus
Pⓘ Monazite GroupREE(PO4)
Pⓘ Monazite-(Ce)Ce(PO4)
Pⓘ Xenotime-(Y)Y(PO4)
Pⓘ ApatiteCa5(PO4)3A
SSulfur
Sⓘ AnglesitePbSO4
Sⓘ ChalcopyriteCuFeS2
Sⓘ CovelliteCuS
Sⓘ GalenaPbS
Sⓘ GypsumCaSO4 · 2H2O
Sⓘ LinaritePbCu(SO4)(OH)2
Sⓘ MarcasiteFeS2
Sⓘ MolybdeniteMoS2
Sⓘ PyriteFeS2
Sⓘ PyrrhotiteFe1-xS
Sⓘ SphaleriteZnS
Sⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
KPotassium
Kⓘ Microcline var. AmazoniteK(AlSi3O8)
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kⓘ MicroclineK(AlSi3O8)
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Kⓘ TrilithioniteK(Li1.5Al1.5)(AlSi3O10)(F,OH)2
Kⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
CaCalcium
Caⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Caⓘ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Caⓘ AnorthiteCa(Al2Si2O8)
Caⓘ CalciteCaCO3
Caⓘ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Caⓘ DiopsideCaMgSi2O6
Caⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Caⓘ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Caⓘ FluoriteCaF2
Caⓘ GypsumCaSO4 · 2H2O
Caⓘ Kainosite-(Y)Ca2Y2(SiO3)4(CO3) · H2O
Caⓘ Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Caⓘ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Caⓘ ScheeliteCa(WO4)
Caⓘ Synchysite-(Y)CaY(CO3)2F
Caⓘ Zoisite var. Thulite{Ca2}{Al,Mn33+}(Si2O7)(SiO4)O(OH)
Caⓘ TitaniteCaTiO(SiO4)
Caⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Caⓘ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Caⓘ Hornblende Root Name Group◻Ca2(C42+C3+)(AlSi7O22)W2
Caⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Caⓘ ApatiteCa5(PO4)3A
TiTitanium
Tiⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Tiⓘ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Tiⓘ IlmeniteFe2+TiO3
Tiⓘ RutileTiO2
Tiⓘ TitaniteCaTiO(SiO4)
MnManganese
Mnⓘ Zoisite var. Thulite{Ca2}{Al,Mn33+}(Si2O7)(SiO4)O(OH)
Mnⓘ Columbite-(Fe)-Columbite-(Mn) Series
FeIron
Feⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Feⓘ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Feⓘ AlmandineFe32+Al2(SiO4)3
Feⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feⓘ ChalcopyriteCuFeS2
Feⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Feⓘ Gadolinite-(Y)Y2Fe2+Be2Si2O10
Feⓘ GoethiteFe3+O(OH)
Feⓘ HematiteFe2O3
Feⓘ IlmeniteFe2+TiO3
Feⓘ MagnetiteFe2+Fe23+O4
Feⓘ MarcasiteFeS2
Feⓘ PyriteFeS2
Feⓘ PyrrhotiteFe1-xS
Feⓘ Samarskite-(Y)YFe3+Nb2O8
Feⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Feⓘ SideriteFeCO3
Feⓘ Columbite-(Fe)-Columbite-(Mn) Series
CuCopper
Cuⓘ AzuriteCu3(CO3)2(OH)2
Cuⓘ ChalcopyriteCuFeS2
Cuⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Cuⓘ CovelliteCuS
Cuⓘ CupriteCu2O
Cuⓘ Native CopperCu
Cuⓘ LinaritePbCu(SO4)(OH)2
Cuⓘ MalachiteCu2(CO3)(OH)2
Cuⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
ZnZinc
Znⓘ GahniteZnAl2O4
Znⓘ SphaleriteZnS
SrStrontium
Srⓘ StrontianiteSrCO3
YYttrium
Yⓘ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Yⓘ Gadolinite-(Y)Y2Fe2+Be2Si2O10
Yⓘ Kainosite-(Y)Ca2Y2(SiO3)4(CO3) · H2O
Yⓘ Samarskite-(Y)YFe3+Nb2O8
Yⓘ Synchysite-(Y)CaY(CO3)2F
Yⓘ Xenotime-(Y)Y(PO4)
ZrZirconium
Zrⓘ ZirconZr(SiO4)
Zrⓘ Zircon var. CyrtoliteZr[(SiO4),(OH)4]
NbNiobium
Nbⓘ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Nbⓘ Samarskite-(Y)YFe3+Nb2O8
Nbⓘ Columbite-(Fe)-Columbite-(Mn) Series
MoMolybdenum
Moⓘ MolybdeniteMoS2
AgSilver
Agⓘ Native SilverAg
SbAntimony
Sbⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
CeCerium
Ceⓘ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Ceⓘ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Ceⓘ Monazite-(Ce)Ce(PO4)
TaTantalum
Taⓘ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
WTungsten
Wⓘ ScheeliteCa(WO4)
AuGold
Auⓘ Native GoldAu
PbLead
Pbⓘ AnglesitePbSO4
Pbⓘ GalenaPbS
Pbⓘ LinaritePbCu(SO4)(OH)2
ThThorium
Thⓘ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
UUranium
Uⓘ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Uⓘ UraniniteUO2

Other Databases

Link to USGS MRDS:10101797

Localities in this Region

USA
USA

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic 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, 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

Lindgren, Waldemar (1908), Notes on Copper Deposits in Chaffee, Fremont, and Jefferson Counties, Colorado, USGS Bulletin 340: 157-174.
Vanderwilt, J.W. (1947) Mineral Resources of Colorado. Colorado Mineral Resources Board: 83-85.
Harrer, C.M., and Tesch, W.J., Jr. (1959), Reconnaissance of Iron Occurrences in Colorado, U.S. Bureau of Mines Information circular 7918, 82 p.
Taylor, R.B., Scott, G.R., Wobus, R.A., and Epis, R.C. (1975), Reconnaissance Geologic Map of the Cotopaxi 15-minute quadrangle, Fremont and Custer Counties, Colorado. USGS Map I-900, 1:62,500.
Heinrich, E.W. (1981), Precambrian Tungsten and Copper-Zinc Skarn Deposits of South-Central Colorado, Colorado Geological Survey Resource Series 21, 115 pp.
Sheridan, D.M. and Raymond, W.H. (1984) Preliminary report on the geology of the Sedalia mine area and its Proterozoic deposits of base-metal sulfides and gahnite, Chaffee County, Colorado. USGS Open-File Report 84-0800, 27 p., 1 plate.
Sheridan, D.M., Raymond, W.H., Taylor, R.B., and Hasler, J.W. (1990), Metallogenic map of stratabound exhalative and related occurrences in Colorado: USGS Miscellaneous Investigations Series Map I-1971, scale 1:1,000,000.
Heimann, Adriana (2002), The composition of zinc-rich spinels associated with metamorphosed massive sulfide deposits - a reexamination, Society of Economic Geologists Abstracts, 2002 Denver Annual Meeting.
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Quick NavTopCommoditiesMineral ListRock TypesOther DatabasesLocalities in RegionOther RegionsReferences
 
and/or  
Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: October 21, 2026 13:36:51 Page updated: July 27, 2026 07:38:08
Go to top of page