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Prairie Divide Mining District (St. Cloud Mining District), Larimer Co., Colorado, USAi
Regional Level Types
Prairie Divide Mining District (St. Cloud Mining District)Mining District
Larimer Co.County
ColoradoState
USACountry

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Key
Latitude & Longitude (WGS84):
40° North , 105° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~72km
Locality type:


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Regions containing this locality

North America PlateTectonic Plate
Rocky Mountains, North AmericaMountain Range

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Standard Detailed Strunz Dana 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

24 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!

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

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Alphabetical List Tree Diagram

Detailed Mineral List:

Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Anthophyllite
Formula: ☐{Mg2}{Mg5}(Si8O22)(OH)2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Azurite
Formula: Cu3(CO3)2(OH)2
Reference: Minerals of Colorado (1997) Eckel, E. B.
Beryl
Formula: Be3Al2(Si6O18)
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Chalcopyrite
Formula: CuFeS2
Clinozoisite
Formula: {Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Reference: Minerals of Colorado (1997) Eckel, E. B.
Coffinite
Formula: U(SiO4) · nH2O
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'Columbite-(Fe)-Columbite-(Mn) Series'
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Cummingtonite
Formula: ☐{Mg2}{Mg5}(Si8O22)(OH)2
Reference: Minerals of Colorado (1997) Eckel, E. B.
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: Minerals of Colorado (1997) Eckel, E. B.
Fluorite
Formula: CaF2
Galena
Formula: PbS
Reference: Page, L. R.; Stocking, H. E.; Smith, H. B. (1956) Contributions to the geology of uranium and thorium by the United States Geological Survey and Atomic Energy Commission for the United Nations International Conference on Peaceful Uses of Atomic Energy, Geneva, Switzerland, 1955. USGS Professional Paper 300 pp97-103
Goethite
Formula: α-Fe3+O(OH)
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Hematite
Formula: Fe2O3
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'Hornblende'
Reference: Minerals of Colorado (1997) E.B. Eckel
Magnetite
Formula: Fe2+Fe3+2O4
Marcasite
Formula: FeS2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Molybdenite
Formula: MoS2
'Monazite'
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Reference: 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.; Page, L. R.; Stocking, H. E.; Smith, H. B. (1956) Contributions to the geology of uranium and thorium by the United States Geological Survey and Atomic Energy Commission for the United Nations International Conference on Peaceful Uses of Atomic Energy, Geneva, Switzerland, 1955. USGS Professional Paper 300 pp97-103
Pyrrhotite
Formula: Fe7S8
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Quartz
Formula: SiO2
Reference: Minerals of Colorado (1997) Eckel, E. B.; Page, L. R.; Stocking, H. E.; Smith, H. B. (1956) Contributions to the geology of uranium and thorium by the United States Geological Survey and Atomic Energy Commission for the United Nations International Conference on Peaceful Uses of Atomic Energy, Geneva, Switzerland, 1955. USGS Professional Paper 300 pp97-103
Siderite
Formula: FeCO3
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Page, L. R.; Stocking, H. E.; Smith, H. B. (1956) Contributions to the geology of uranium and thorium by the United States Geological Survey and Atomic Energy Commission for the United Nations International Conference on Peaceful Uses of Atomic Energy, Geneva, Switzerland, 1955. USGS Professional Paper 300 pp97-103
Sphalerite
Formula: ZnS
'Tantalite'
Formula: (Mn,Fe)(Ta,Nb)2O6
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Topaz
Formula: Al2(SiO4)(F,OH)2
Reference: Minerals of Colorado (1997) E.B. Eckel
Uraninite
Formula: UO2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Page, L. R.; Stocking, H. E.; Smith, H. B. (1956) Contributions to the geology of uranium and thorium by the United States Geological Survey and Atomic Energy Commission for the United Nations International Conference on Peaceful Uses of Atomic Energy, Geneva, Switzerland, 1955. USGS Professional Paper 300 pp97-103
Uraninite var: Pitchblende
Formula: UO2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Page, L. R.; Stocking, H. E.; Smith, H. B. (1956) Contributions to the geology of uranium and thorium by the United States Geological Survey and Atomic Energy Commission for the United Nations International Conference on Peaceful Uses of Atomic Energy, Geneva, Switzerland, 1955. USGS Professional Paper 300 pp97-103

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Galena2.CD.10PbS
Marcasite2.EB.10aFeS2
Molybdenite2.EA.30MoS2
Pyrite2.EB.05aFeS2
Pyrrhotite2.CC.10Fe7S8
Sphalerite2.CB.05aZnS
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Goethite4.00.α-Fe3+O(OH)
Hematite4.CB.05Fe2O3
Magnetite4.BB.05Fe2+Fe3+2O4
Quartz4.DA.05SiO2
Uraninite4.DL.05UO2
var: Pitchblende4.DL.05UO2
Group 5 - Nitrates and Carbonates
Azurite5.BA.05Cu3(CO3)2(OH)2
Siderite5.AB.05FeCO3
Group 9 - Silicates
Actinolite9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Anthophyllite9.DD.05☐{Mg2}{Mg5}(Si8O22)(OH)2
Beryl9.CJ.05Be3Al2(Si6O18)
Clinozoisite9.BG.05a{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Coffinite9.AD.30U(SiO4) · nH2O
Cummingtonite9.DE.05☐{Mg2}{Mg5}(Si8O22)(OH)2
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Topaz9.AF.35Al2(SiO4)(F,OH)2
Unclassified Minerals, Rocks, etc.
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Columbite-(Fe)-Columbite-(Mn) Series'-
'Hornblende'-
'Monazite'-
'Tantalite'-(Mn,Fe)(Ta,Nb)2O6

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Pyrrhotite2.8.10.1Fe7S8
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Marcasite2.12.2.1FeS2
Molybdenite2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Group 5 - OXIDES CONTAINING URANIUM OR THORIUM
AXO2·xH2O
Uraninite5.1.1.1UO2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Siderite14.1.1.3FeCO3
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Azurite16a.2.1.1Cu3(CO3)2(OH)2
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in >[6] coordination
Coffinite51.5.2.4U(SiO4) · nH2O
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
Topaz52.3.1.1Al2(SiO4)(F,OH)2
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Clinozoisite58.2.1a.4{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Beryl61.1.1.1Be3Al2(Si6O18)
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Anthophyllite66.1.2.1☐{Mg2}{Mg5}(Si8O22)(OH)2
Cummingtonite66.1.1.1☐{Mg2}{Mg5}(Si8O22)(OH)2
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Phlogopite71.2.2b.1KMg3(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Columbite-(Fe)-Columbite-(Mn) Series'-
'Hornblende'-
'Monazite'-
'Tantalite'-(Mn,Fe)(Ta,Nb)2O6
Uraninite
var: Pitchblende
-UO2

List of minerals for each chemical element

HHydrogen
H CoffiniteU(SiO4) · nH2O
H Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
H ApatiteCa5(PO4)3(Cl/F/OH)
H Goethiteα-Fe3+O(OH)
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
H PhlogopiteKMg3(AlSi3O10)(OH)2
H AzuriteCu3(CO3)2(OH)2
H Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H Cummingtonite☐{Mg2}{Mg5}(Si8O22)(OH)2
H TopazAl2(SiO4)(F,OH)2
BeBeryllium
Be BerylBe3Al2(Si6O18)
CCarbon
C SideriteFeCO3
C AzuriteCu3(CO3)2(OH)2
OOxygen
O Uraninite (var: Pitchblende)UO2
O CoffiniteU(SiO4) · nH2O
O MagnetiteFe2+Fe23+O4
O Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
O ApatiteCa5(PO4)3(Cl/F/OH)
O Goethiteα-Fe3+O(OH)
O HematiteFe2O3
O SideriteFeCO3
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O PhlogopiteKMg3(AlSi3O10)(OH)2
O BerylBe3Al2(Si6O18)
O Tantalite(Mn,Fe)(Ta,Nb)2O6
O AzuriteCu3(CO3)2(OH)2
O Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O Cummingtonite☐{Mg2}{Mg5}(Si8O22)(OH)2
O QuartzSiO2
O TopazAl2(SiO4)(F,OH)2
O UraniniteUO2
FFluorine
F ApatiteCa5(PO4)3(Cl/F/OH)
F FluoriteCaF2
F TopazAl2(SiO4)(F,OH)2
MgMagnesium
Mg Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
Mg Cummingtonite☐{Mg2}{Mg5}(Si8O22)(OH)2
AlAluminium
Al PhlogopiteKMg3(AlSi3O10)(OH)2
Al BerylBe3Al2(Si6O18)
Al Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al TopazAl2(SiO4)(F,OH)2
SiSilicon
Si CoffiniteU(SiO4) · nH2O
Si Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Si PhlogopiteKMg3(AlSi3O10)(OH)2
Si BerylBe3Al2(Si6O18)
Si Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si Cummingtonite☐{Mg2}{Mg5}(Si8O22)(OH)2
Si QuartzSiO2
Si TopazAl2(SiO4)(F,OH)2
PPhosphorus
P ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
S SphaleriteZnS
S PyrrhotiteFe7S8
S PyriteFeS2
S ChalcopyriteCuFeS2
S MolybdeniteMoS2
S MarcasiteFeS2
S GalenaPbS
ClChlorine
Cl ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
K PhlogopiteKMg3(AlSi3O10)(OH)2
CaCalcium
Ca ApatiteCa5(PO4)3(Cl/F/OH)
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Ca FluoriteCaF2
Ca Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
MnManganese
Mn Tantalite(Mn,Fe)(Ta,Nb)2O6
FeIron
Fe PyrrhotiteFe7S8
Fe PyriteFeS2
Fe ChalcopyriteCuFeS2
Fe MagnetiteFe2+Fe23+O4
Fe MarcasiteFeS2
Fe Goethiteα-Fe3+O(OH)
Fe HematiteFe2O3
Fe SideriteFeCO3
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Fe Tantalite(Mn,Fe)(Ta,Nb)2O6
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
CuCopper
Cu ChalcopyriteCuFeS2
Cu AzuriteCu3(CO3)2(OH)2
ZnZinc
Zn SphaleriteZnS
NbNiobium
Nb Tantalite(Mn,Fe)(Ta,Nb)2O6
MoMolybdenum
Mo MolybdeniteMoS2
TaTantalum
Ta Tantalite(Mn,Fe)(Ta,Nb)2O6
PbLead
Pb GalenaPbS
UUranium
U Uraninite (var: Pitchblende)UO2
U CoffiniteU(SiO4) · nH2O
U UraniniteUO2

Localities in this Region


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