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Cotopaxi Mine (Cotopaxi lode; Gumaer Mine; Fannie lode; Fannie Mill), Mine Gulch, Cotopaxi, Cotopaxi District, Fremont Co., Colorado, USAi
Regional Level Types
Cotopaxi Mine (Cotopaxi lode; Gumaer Mine; Fannie lode; Fannie Mill)Mine
Mine GulchGulch
Cotopaxi- not defined -
Cotopaxi DistrictMining District
Fremont Co.County
ColoradoState
USACountry

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Key
Lock Map
Latitude & Longitude (WGS84): 38° 22' 48'' North , 105° 41' 54'' West
Latitude & Longitude (decimal): 38.38001,-105.69838
GeoHash:G#: 9wuf6fbgc
USGS MRDS Record:10087764
Locality type:Mine
Köppen climate type:BSk : Cold semi-arid (steppe) climate
Nearest Settlements:
PlacePopulationDistance
Coaldale255 (2011)5.4km
Howard723 (2011)14.2km
Salida5,467 (2017)31.3km
Smeltertown120 (2011)33.2km
Westcliffe577 (2017)34.0km


A Cu-Zn-Au-Ag-Pb-Mo-Fe-W occurrence/mine is located in the E½SE¼ sec. 25, T48N, R11E, NMM, 1.4 km (0.9 mile) NW of Cotopaxi (coordinates of reference), in Mine Gulch (about 0.5 mile NW of the bridge across the Arkansas River at Cotopaxi; 25 miles E of Salida via US Highway 50). Owned by Brown Mineral Research, Inc., Canon City, Colorado (1975- ). Operated by the Tombstone Mining Company, Canon City, Colorado (1975- ). MRDS database accuracy for this location is not stated. Lindgren (1908) visited the property in 1907 and noted that the Cotopaxi Mine had been idle for many years, but at one time was a "considerable shipper of ore."

Mineralization is a deposit (Mineral occurrence model information: Model code: 271; USGS model code: unassigned; Deposit model name: Stratabound Precambrian sulfide, Colorado and Wyoming) hosted in Paleoproterozoic amphibolite, biotite schist, schist, gneiss, skarn and granodiorite, on the W side of an anticline. The ore body is lenticular in form, strikes NE and dips N45W at a width of 15.24 meters and a length of 91.44 meters. Controls for ore emplacement included leucocratic bands and amphibolite. Cotopaxi is thought to be a metamorphosed massive sulfide deposit similar to the Sedalia Mine near Salida and the Betty (Lone Chimney) Mine near Guffey (Sheridan and Raymond, 1984). Gahnite, a zinc spinel, is present in large quantities. Zinc spinels are indicative of metamorphosed massive sulfide deposits (Heimann, 2002). Heinrich (1981) described the Cotopaxi deposit and the Sedalia deposit as skarns. Maps indicate that the strike of the deposit is generally NNE and the dip is about 45 degrees to the SE (Heinrich, 1981). Zinc occurs mainly as sphalerite and gahnite, a zinc spinel mineral. Copper occurs as chalcopyrite. Minor galena and molybdenite are present. Pyrite, pyrrhotite, and magnetite are locally common. Local alteration includes surficial oxidation. Local rocks include granitic rocks of 1700-m.y. age group.

Regional geologic structures include the Thirtynine Mile Volcanic Field. local structures include the Cotopaxi Fault; subsidiary N-, NNE & EW-trending faults.

Workings include surface and underground openings. The surface openings have an overall depth of 0 meters (??), overall length of 152.4 meters and
Overall width 42.67 meters. The underground openings have a length of 304.8M. The workings are comprised of an open pit, a lower adit and an upper adit. The adits access several hundred feet of drifts and stopes (Heinrich, 1981).

Production statistics: Year: 1950 (period: 1915-1950); ore (accurate): ore mined: 15,747.2 metric tons; grade: ^1.11% Cu, 0.58% Pb, 10.41% Zn, 0.97 Ounce Ag/ton, 0.01 ounce Au/ton.

Analytical data results: Sorted ore (1883): 58% Zn, 4.6% Cu, 10 ounces Ag/ton.

Mine dumps along the gulch at the west edge of town, near the cemetery, have yielded specimens.

Regions containing this locality

North America PlateTectonic Plate
Rocky Mountains, North AmericaMountain Range

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


50 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:

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.; Am Min 50:1179-1212
Albite
Formula: Na(AlSi3O8)
Reference: Minerals of Colorado (1997) Eckel, E. B.; Am Min 50:1179-1212
Albite var: Oligoclase
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
Reference: Am Min 50:1179-1212
Almandine
Formula: Fe2+3Al2(SiO4)3
Reference: "Minerals of Colorado, updated & revised", p. 14, by Eckel, Edwin B., 1997
Amesite
Formula: Mg2Al(AlSiO5)(OH)4
Reference: "Minerals of Colorado, updated & revised", p. 14, by Eckel, Edwin B., 1997
Anglesite
Formula: PbSO4
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Am Min 50:1179-1212
Anorthite
Formula: Ca(Al2Si2O8)
Reference: Am Min 50:1179-1212
Anthophyllite
Formula: ☐{Mg2}{Mg5}(Si8O22)(OH)2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Am Min 50:1179-1212; The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
'Apatite'
Reference: Am Min 50:1179-1212
Azurite
Formula: Cu3(CO3)2(OH)2
Reference: Am Min 50:1179-1212
'Biotite'
Reference: Pearl, 1958. Colorado Gem Trails & Mineral Guide; Am Min 50:1179-1212; USGS Prof Paper 223; The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
Calcite
Formula: CaCO3
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Am Min 50:1179-1212
Chalcopyrite
Formula: CuFeS2
Reference: Pearl, 1958. Colorado Gem Trails & Mineral Guide; Am Min 50:1179-1212; USGS Prof Paper 223; The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
'Chlorite Group'
Reference: Am Min 50:1179-1212
Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Reference: Am Min 50:1179-1212
Clinohumite
Formula: Mg9(SiO4)4F2
Reference: "Minerals of Colorado, updated & revised", p. 14, by Eckel, Edwin B., 1997; Am Min 50:1179-1212
Clinozoisite
Formula: {Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Reference: "Minerals of Colorado, updated & revised", p. 14, by Eckel, Edwin B., 1997; Am Min 50:1179-1212
Cordierite
Formula: (Mg,Fe)2Al3(AlSi5O18)
Reference: "Minerals of Colorado, updated & revised", p. 14, by Eckel, Edwin B., 1997; Am Min 50:1179-1212
Covellite
Formula: CuS
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Am Min 50:1179-1212; The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
Cuprite
Formula: Cu2O
Reference: "Minerals of Colorado, updated & revised", p. 14, by Eckel, Edwin B., 1997; Am Min 50:1179-1212
Diopside
Formula: CaMgSi2O6
Reference: "Minerals of Colorado, updated & revised", p. 14, by Eckel, Edwin B., 1997; Am Min 50:1179-1212
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: "Minerals of Colorado, updated & revised", p. 14, by Eckel, Edwin B., 1997; Am Min 50:1179-1212
Fluorite
Formula: CaF2
Reference: Am Min 50:1179-1212
Forsterite
Formula: Mg2SiO4
Reference: Minerals of Colorado (1997) Eckel, E. B.; Am Min 50:1179-1212
Gahnite
Formula: ZnAl2O4
Reference: "Minerals of Colorado, updated & revised", p. 14, by Eckel, Edwin B., 1997; Am Min 50:1179-1212; USGS Prof Paper 223; The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
Galena
Formula: PbS
Reference: Dana 7:I:695.; Am Min 50:1179-1212; USGS Prof Paper 223; The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Am Min 50:1179-1212; USGS Prof Paper 223; The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
Goethite
Formula: α-Fe3+O(OH)
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Am Min 50:1179-1212
Gypsum
Formula: CaSO4 · 2H2O
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Am Min 50:1179-1212
Hematite
Formula: Fe2O3
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Am Min 50:1179-1212
'Hornblende'
Reference: Am Min 50:1179-1212; The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
Ilmenite
Formula: Fe2+TiO3
Reference: The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
'Labradorite'
Formula: (Ca,Na)[Al(Al,Si)Si2O8]
Reference: Am Min 50:1179-1212
Leucoxene
Reference: Am Min 50:1179-1212
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Am Min 50:1179-1212
Linarite
Formula: PbCu(SO4)(OH)2
Reference: "Minerals of Colorado, updated & revised", p. 14, by Eckel, Edwin B., 1997
Magnetite
Formula: Fe2+Fe3+2O4
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Am Min 50:1179-1212; The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
Malachite
Formula: Cu2(CO3)(OH)2
Reference: Pearl, 1958. Colorado Gem Trails & Mineral Guide; Am Min 50:1179-1212
Marcasite
Formula: FeS2
Reference: Minerals of Colorado (1997) E.B. Eckel; Am Min 50:1179-1212; The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
Microcline
Formula: K(AlSi3O8)
Reference: "Minerals of Colorado, updated & revised", p. 14, by Eckel, Edwin B., 1997; Am Min 50:1179-1212
Microcline var: Amazonite
Formula: K(AlSi3O8)
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Am Min 50:1179-1212
Molybdenite
Formula: MoS2
Reference: "Minerals of Colorado, updated & revised", p. 14, by Eckel, Edwin B., 1997; Am Min 50:1179-1212
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Am Min 50:1179-1212
Muscovite var: Sericite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Am Min 50:1179-1212
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Am Min 50:1179-1212
Pyrite
Formula: FeS2
Reference: Pearl, 1958. Colorado Gem Trails & Mineral Guide; Am Min 50:1179-1212; The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
Pyrrhotite
Formula: Fe7S8
Reference: "Minerals of Colorado, updated & revised", p. 14, by Eckel, Edwin B., 1997; Am Min 50:1179-1212; The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
Quartz
Formula: SiO2
Reference: Pearl, 1958. Colorado Gem Trails & Mineral Guide; Am Min 50:1179-1212; USGS Prof Paper 223
Rutile
Formula: TiO2
Reference: The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
'Scapolite'
Reference: Am Min 50:1179-1212
Scheelite
Formula: Ca(WO4)
Reference: "Minerals of Colorado, updated & revised", p. 14, by Eckel, Edwin B., 1997; Am Min 50:1179-1212
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Reference: Minerals of Colorado (1997) E.B. Eckel
'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Reference: Am Min 50:1179-1212
Siderite
Formula: FeCO3
Reference: "Minerals of Colorado, updated & revised", p. 14, by Eckel, Edwin B., 1997; Am Min 50:1179-1212
Sillimanite
Formula: Al2(SiO4)O
Reference: "Minerals of Colorado, updated & revised", p. 14, by Eckel, Edwin B., 1997; Am Min 50:1179-1212; The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
Silver
Formula: Ag
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Sphalerite
Formula: ZnS
Reference: Dana 7:I:695.; Am Min 50:1179-1212; USGS Prof Paper 223; The Canadian Mineralogist Vol. 43, pp. 601-622 (2005)
Strontianite
Formula: SrCO3
Reference: "Minerals of Colorado, updated & revised", p. 14, by Eckel, Edwin B., 1997; Am Min 50:1179-1212
Tetrahedrite
Formula: Cu6[Cu4(Fe,Zn)2]Sb4S13
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Titanite
Formula: CaTi(SiO4)O
Reference: Am Min 50:1179-1212; Am Min 50:1179-1212
'Tourmaline'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Reference: "Minerals of Colorado, updated & revised", p. 14, by Eckel, Edwin B., 1997; Am Min 50:1179-1212
Zircon
Formula: Zr(SiO4)
Reference: Am Min 50:1179-1212
Zoisite
Formula: {Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Reference: Am Min 50:1179-1212
Zoisite var: Thulite
Formula: {Ca2}{Al,Mn3+3}(Si2O7)(SiO4)O(OH)
Reference: "Minerals of Colorado, updated & revised", p. 14, by Eckel, Edwin B., 1997

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Silver1.AA.05Ag
Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Covellite2.CA.05aCuS
Galena2.CD.10PbS
Marcasite2.EB.10aFeS2
Molybdenite2.EA.30MoS2
Pyrite2.EB.05aFeS2
Pyrrhotite2.CC.10Fe7S8
Sphalerite2.CB.05aZnS
Tetrahedrite2.GB.05Cu6[Cu4(Fe,Zn)2]Sb4S13
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Cuprite4.AA.10Cu2O
Gahnite4.BB.05ZnAl2O4
Goethite4.00.α-Fe3+O(OH)
Hematite4.CB.05Fe2O3
Ilmenite4.CB.05Fe2+TiO3
Magnetite4.BB.05Fe2+Fe3+2O4
Quartz4.DA.05SiO2
Rutile4.DB.05TiO2
Group 5 - Nitrates and Carbonates
Azurite5.BA.05Cu3(CO3)2(OH)2
Calcite5.AB.05CaCO3
Malachite5.BA.10Cu2(CO3)(OH)2
Siderite5.AB.05FeCO3
Strontianite5.AB.15SrCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Anglesite7.AD.35PbSO4
Gypsum7.CD.40CaSO4 · 2H2O
Linarite7.BC.65PbCu(SO4)(OH)2
Scheelite7.GA.05Ca(WO4)
Group 9 - Silicates
Actinolite9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Albite9.FA.35Na(AlSi3O8)
var: Oligoclase9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
Almandine9.AD.25Fe2+3Al2(SiO4)3
Amesite9.ED.15Mg2Al(AlSiO5)(OH)4
Anorthite9.FA.35Ca(Al2Si2O8)
Anthophyllite9.DD.05☐{Mg2}{Mg5}(Si8O22)(OH)2
Chrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Clinohumite9.AF.55Mg9(SiO4)4F2
Clinozoisite9.BG.05a{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Cordierite9.CJ.10(Mg,Fe)2Al3(AlSi5O18)
Diopside9.DA.15CaMgSi2O6
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Forsterite9.AC.05Mg2SiO4
'Labradorite'9.FA.35(Ca,Na)[Al(Al,Si)Si2O8]
Microcline9.FA.30K(AlSi3O8)
var: Amazonite9.FA.30K(AlSi3O8)
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var: Sericite9.EC.15KAl2(AlSi3O10)(OH)2
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Schorl9.CK.05Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Sillimanite9.AF.05Al2(SiO4)O
Titanite9.AG.15CaTi(SiO4)O
Zircon9.AD.30Zr(SiO4)
Zoisite9.BG.10{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
var: Thulite9.BG.10{Ca2}{Al,Mn3+3}(Si2O7)(SiO4)O(OH)
Unclassified Minerals, Rocks, etc.
'Apatite'-
'Biotite'-
'Chlorite Group'-
'Garnet Group'-X3Z2(SiO4)3
'Hornblende'-
Leucoxene-
'Limonite'-(Fe,O,OH,H2O)
'Scapolite'-
'Serpentine Subgroup'-D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z

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
Covellite2.8.12.1CuS
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 3 - SULFOSALTS
3 <ø < 4
Tetrahedrite3.3.6.1Cu6[Cu4(Fe,Zn)2]Sb4S13
Group 4 - SIMPLE OXIDES
A2X
Cuprite4.1.1.1Cu2O
A2X3
Hematite4.3.1.2Fe2O3
Ilmenite4.3.5.1Fe2+TiO3
AX2
Rutile4.4.1.1TiO2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Group 7 - MULTIPLE OXIDES
AB2X4
Gahnite7.2.1.4ZnAl2O4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Siderite14.1.1.3FeCO3
Strontianite14.1.3.3SrCO3
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Azurite16a.2.1.1Cu3(CO3)2(OH)2
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Anglesite28.3.1.3PbSO4
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
Group 30 - ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq
Linarite30.2.3.1PbCu(SO4)(OH)2
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Scheelite48.1.2.1Ca(WO4)
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with all cations in octahedral [6] coordination
Forsterite51.3.1.2Mg2SiO4
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Almandine51.4.3a.2Fe2+3Al2(SiO4)3
Insular SiO4 Groups Only with cations in >[6] coordination
Zircon51.5.2.1Zr(SiO4)
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [4] and >[4] coordination
Sillimanite52.2.2a.1Al2(SiO4)O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
Clinohumite52.3.2d.1Mg9(SiO4)4F2
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Titanite52.4.3.1CaTi(SiO4)O
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)
Zoisite58.2.1b.1{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with Al substituted rings
Cordierite61.2.1.1(Mg,Fe)2Al3(AlSi5O18)
Six-Membered Rings with borate groups
Schorl61.3.1.10Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Diopside65.1.3a.1CaMgSi2O6
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Anthophyllite66.1.2.1☐{Mg2}{Mg5}(Si8O22)(OH)2
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 1:1 layers
Amesite71.1.2c.1Mg2Al(AlSiO5)(OH)4
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Phlogopite71.2.2b.1KMg3(AlSi3O10)(OH)2
Group 74 - PHYLLOSILICATES Modulated Layers
Modulated Layers with joined strips
Chrysocolla74.3.2.1Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Microcline76.1.1.5K(AlSi3O8)
Unclassified Minerals, Mixtures, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Albite
var: Oligoclase
-(Na,Ca)[Al(Si,Al)Si2O8]
Anorthite-Ca(Al2Si2O8)
'Apatite'-
'Biotite'-
'Chlorite Group'-
'Garnet Group'-X3Z2(SiO4)3
'Hornblende'-
'Labradorite'-(Ca,Na)[Al(Al,Si)Si2O8]
Leucoxene-
'Limonite'-(Fe,O,OH,H2O)
Microcline
var: Amazonite
-K(AlSi3O8)
Muscovite
var: Sericite
-KAl2(AlSi3O10)(OH)2
'Scapolite'-
'Serpentine Subgroup'-D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z
Zoisite
var: Thulite
-{Ca2}{Al,Mn3+3}(Si2O7)(SiO4)O(OH)

List of minerals for each chemical element

HHydrogen
H AmesiteMg2Al(AlSiO5)(OH)4
H Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H LinaritePbCu(SO4)(OH)2
H Zoisite (var: Thulite){Ca2}{Al,Mn33+}(Si2O7)(SiO4)O(OH)
H MalachiteCu2(CO3)(OH)2
H Goethiteα-Fe3+O(OH)
H Limonite(Fe,O,OH,H2O)
H GypsumCaSO4 · 2H2O
H Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
H PhlogopiteKMg3(AlSi3O10)(OH)2
H SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
H MuscoviteKAl2(AlSi3O10)(OH)2
H Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
H Zoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
H Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
H ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
H AzuriteCu3(CO3)2(OH)2
BBoron
B TourmalineA(D3)G6(T6O18)(BO3)3X3Z
B SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
CCarbon
C SideriteFeCO3
C StrontianiteSrCO3
C MalachiteCu2(CO3)(OH)2
C CalciteCaCO3
C AzuriteCu3(CO3)2(OH)2
OOxygen
O AlmandineFe32+Al2(SiO4)3
O AmesiteMg2Al(AlSiO5)(OH)4
O ClinohumiteMg9(SiO4)4F2
O Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
O Cordierite(Mg,Fe)2Al3(AlSi5O18)
O CupriteCu2O
O DiopsideCaMgSi2O6
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O GahniteZnAl2O4
O LinaritePbCu(SO4)(OH)2
O MicroclineK(AlSi3O8)
O ScheeliteCa(WO4)
O SideriteFeCO3
O SillimaniteAl2(SiO4)O
O StrontianiteSrCO3
O TourmalineA(D3)G6(T6O18)(BO3)3X3Z
O Zoisite (var: Thulite){Ca2}{Al,Mn33+}(Si2O7)(SiO4)O(OH)
O MalachiteCu2(CO3)(OH)2
O QuartzSiO2
O Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
O AnglesitePbSO4
O MagnetiteFe2+Fe23+O4
O Goethiteα-Fe3+O(OH)
O HematiteFe2O3
O Limonite(Fe,O,OH,H2O)
O GypsumCaSO4 · 2H2O
O CalciteCaCO3
O Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O PhlogopiteKMg3(AlSi3O10)(OH)2
O Microcline (var: Amazonite)K(AlSi3O8)
O ForsteriteMg2SiO4
O AlbiteNa(AlSi3O8)
O SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
O MuscoviteKAl2(AlSi3O10)(OH)2
O ZirconZr(SiO4)
O Garnet GroupX3Z2(SiO4)3
O Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
O Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
O TitaniteCaTi(SiO4)O
O Zoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
O Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
O ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
O AzuriteCu3(CO3)2(OH)2
O RutileTiO2
O IlmeniteFe2+TiO3
O AnorthiteCa(Al2Si2O8)
FFluorine
F ClinohumiteMg9(SiO4)4F2
F FluoriteCaF2
NaSodium
Na Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Na AlbiteNa(AlSi3O8)
Na SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Na Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
MgMagnesium
Mg AmesiteMg2Al(AlSiO5)(OH)4
Mg ClinohumiteMg9(SiO4)4F2
Mg Cordierite(Mg,Fe)2Al3(AlSi5O18)
Mg DiopsideCaMgSi2O6
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 ForsteriteMg2SiO4
Mg Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
AlAluminium
Al AlmandineFe32+Al2(SiO4)3
Al AmesiteMg2Al(AlSiO5)(OH)4
Al Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Al Cordierite(Mg,Fe)2Al3(AlSi5O18)
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al GahniteZnAl2O4
Al MicroclineK(AlSi3O8)
Al SillimaniteAl2(SiO4)O
Al Zoisite (var: Thulite){Ca2}{Al,Mn33+}(Si2O7)(SiO4)O(OH)
Al Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Al PhlogopiteKMg3(AlSi3O10)(OH)2
Al Microcline (var: Amazonite)K(AlSi3O8)
Al AlbiteNa(AlSi3O8)
Al SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Al Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
Al Zoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Al Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Al ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Al AnorthiteCa(Al2Si2O8)
SiSilicon
Si AlmandineFe32+Al2(SiO4)3
Si AmesiteMg2Al(AlSiO5)(OH)4
Si ClinohumiteMg9(SiO4)4F2
Si Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Si Cordierite(Mg,Fe)2Al3(AlSi5O18)
Si DiopsideCaMgSi2O6
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si MicroclineK(AlSi3O8)
Si SillimaniteAl2(SiO4)O
Si Zoisite (var: Thulite){Ca2}{Al,Mn33+}(Si2O7)(SiO4)O(OH)
Si QuartzSiO2
Si Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
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 Microcline (var: Amazonite)K(AlSi3O8)
Si ForsteriteMg2SiO4
Si AlbiteNa(AlSi3O8)
Si SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si ZirconZr(SiO4)
Si Garnet GroupX3Z2(SiO4)3
Si Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Si Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
Si TitaniteCaTi(SiO4)O
Si Zoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Si Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Si ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Si AnorthiteCa(Al2Si2O8)
SSulfur
S ChalcopyriteCuFeS2
S LinaritePbCu(SO4)(OH)2
S MolybdeniteMoS2
S PyrrhotiteFe7S8
S GalenaPbS
S SphaleriteZnS
S PyriteFeS2
S AnglesitePbSO4
S CovelliteCuS
S TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
S GypsumCaSO4 · 2H2O
S MarcasiteFeS2
KPotassium
K MicroclineK(AlSi3O8)
K PhlogopiteKMg3(AlSi3O10)(OH)2
K Microcline (var: Amazonite)K(AlSi3O8)
K MuscoviteKAl2(AlSi3O10)(OH)2
K Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
CaCalcium
Ca Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Ca DiopsideCaMgSi2O6
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca ScheeliteCa(WO4)
Ca Zoisite (var: Thulite){Ca2}{Al,Mn33+}(Si2O7)(SiO4)O(OH)
Ca Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Ca GypsumCaSO4 · 2H2O
Ca CalciteCaCO3
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Ca Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
Ca TitaniteCaTi(SiO4)O
Ca Zoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Ca FluoriteCaF2
Ca AnorthiteCa(Al2Si2O8)
TiTitanium
Ti TitaniteCaTi(SiO4)O
Ti RutileTiO2
Ti IlmeniteFe2+TiO3
MnManganese
Mn Zoisite (var: Thulite){Ca2}{Al,Mn33+}(Si2O7)(SiO4)O(OH)
Mn Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
FeIron
Fe ChalcopyriteCuFeS2
Fe AlmandineFe32+Al2(SiO4)3
Fe Cordierite(Mg,Fe)2Al3(AlSi5O18)
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe PyrrhotiteFe7S8
Fe SideriteFeCO3
Fe PyriteFeS2
Fe MagnetiteFe2+Fe23+O4
Fe Goethiteα-Fe3+O(OH)
Fe TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
Fe HematiteFe2O3
Fe Limonite(Fe,O,OH,H2O)
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Fe MarcasiteFeS2
Fe SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Fe Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Fe IlmeniteFe2+TiO3
NiNickel
Ni Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
CuCopper
Cu ChalcopyriteCuFeS2
Cu CupriteCu2O
Cu LinaritePbCu(SO4)(OH)2
Cu MalachiteCu2(CO3)(OH)2
Cu CovelliteCuS
Cu TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
Cu ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Cu AzuriteCu3(CO3)2(OH)2
ZnZinc
Zn GahniteZnAl2O4
Zn SphaleriteZnS
Zn TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
Zn Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
SrStrontium
Sr StrontianiteSrCO3
ZrZirconium
Zr ZirconZr(SiO4)
MoMolybdenum
Mo MolybdeniteMoS2
AgSilver
Ag SilverAg
SbAntimony
Sb TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
WTungsten
W ScheeliteCa(WO4)
PbLead
Pb LinaritePbCu(SO4)(OH)2
Pb GalenaPbS
Pb AnglesitePbSO4

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

Paleoproterozoic
1600 - 2500 Ma



ID: 3186950
Paleoproterozoic crystalline metamorphic rocks

Age: Proterozoic (1600 - 2500 Ma)

Lithology: Orthogneiss/paragneiss

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]

Paleoproterozoic
1600 - 2500 Ma



ID: 2855906
Granitic rocks of 1700-m.y. age group

Age: Proterozoic (1600 - 2500 Ma)

Stratigraphic Name: Boulder Creek Granite; Cross Creek Granite; Denny Creek Granodiorite; Kroenke Granodiorite; Browns Pass Quartz Monzonite; Powderhorn Granite; Pitts Meadow Granodiorite; Bakers Bridge Granite; Tenmile Granite

Description: Includes Boulder Creek -M.Y. AGE GROUP (AGE 1650-1730 M.Y.)--Includes Boulder Creek, Cross Creek, Denny Creek, Kroenke, Browns Pass, Powderhorn, Pitts Meadow, Bakers Bridge, and Tenmile Granites, Quartz Monzonites, or Granodiorites; also, unnamed granitic rocks

Comments: Original map source: Green, G.N., 1992, The Digital Geologic Map of Colorado in ARC/INFO Format: U.S. Geological Survey Open-File Report 92-0507, 9 p., scale 1:500,000.

Lithology: Major:{granite}, Minor:{granodiorite,quartz monzonite}

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]

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)
Lindgren, Waldemar (1908), Notes on Copper Deposits in Chaffee, Fremont, and Jefferson Counties, Colorado, USGS Bulletin 340: 157-174.
Palache, C., Berman, H. & Frondel, C. (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged, 834pp.: 695.
Vanderwilt, J.W. (1947), Mineral Resources of Colorado, Colorado Mineral Resources Board: 161.
Lovering, T.S.and E.N. Goddard (1950), Geology and ore deposits of the Front Range, Colorado, USGS Professional Paper 223.
Pearl, Richard M. (1958), Colorado Gem Trails & Mineral Guide, Sage Books, Chicago, Illinois.
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.
Salotti, C.A. (1965), Mineralogy and Paragenesis of the Cotopaxi, Colorado, Copper-Zinc Skarn Deposit, American Mineralogist: 50(9): 1179-1212.
Taylor, R.B., Scott, G.R., Wobus, R.A., 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.
Coker, R.J. (1982), Mineral Resources of the Arkansas Canyon Planning Unit with Special Emphasis on the former Grape creek Wilderness Study Areas and the McIntyre Hills Wilderness Study Area, U.S. Bureau of Land Management Mineral Report: 50-52.
Coker, R.J. (1982), Colorado Division of Mines Inspection Records.
Sheridan, D.M., and Raymond, W.H. (1984), Precambrian deposits of zinc-copper-lead sulfides and zinc spinel (gahnite) in Colorado: USGS Bulletin 1550, 31 p.
Sheridan, D.M., and Raymond, W.H. (1984), Preliminary report on the geology of the Sedalia mine are 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.
Eckel, Edwin B. (1997), Minerals of Colorado, updated & revised: 14.
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.
The Canadian Mineralogist (2005): 43: 601-622.
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10087764.


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