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Pea Ridge Mine, Washington Co., Missouri, USAi
Regional Level Types
Pea Ridge MineMine
Washington Co.County
MissouriState
USACountry

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Latitude & Longitude (WGS84): 38° 7' 33'' North , 91° 2' 51'' West
Latitude & Longitude (decimal): 38.12611,-91.04750
GeoHash:G#: 9yz2bhthx
Locality type:Mine
Köppen climate type:Cfa : Humid subtropical climate
Nearest Settlements:
PlacePopulationDistance
Miramiguoa Park119 (2017)12.7km
Sullivan7,135 (2017)13.4km
Oak Grove Village489 (2017)14.3km
West Sullivan119 (2017)14.7km
Bourbon1,621 (2017)17.5km


A former iron mine located near Meramec State Park and 13.8 km (8.6 miles) SE of Sullivan. Owned by the St. Joe Domestic Metals Corp, a subsidiary of the Fluor Corp. The Meramec Mining Company (which was a partnership between St Joe and Bethleham Steel Corporation) was the owner until 1978. Produced 1.3 million tons of ore pellets (1984). Mine was closed and flooded in 2001.

Rare earth elements (REE)−bearing breccia pipes cut through the Pea Ridge massive magnetite-iron orebody. The Pea Ridge deposit is hosted by Precambrian volcanic rocks of the St. Francois terrane of southeastern Missouri. The magnetite-rich orebody is interpreted as a high-temperature, magmatic-hydrothermal deposit (Sidder and others, 1993) in ash-flow tuffs and lavas, which may have formed in the root of a volcanic caldera (Nuelle and others, 1991). Four mapped REE-bearing breccia pipes steeply crosscut the magnetite-hematite orebody and its altered rhyolite host rock. Exposed portions of the breccia pipes are as much as 60 m (197 ft) in horizontal length and as much as 15 m (49 ft) in width; the pipes extend below the mined levels to an undetermined depth (Seeger and others, 2001). Rare earth elements–bearing minerals in the breccia pipes include monazite, xenotime, and minor bastnasite and britholite. The REE concentrations reported in the breccia pipes are consistently high but variable. Nuelle and others (1992, p. A1) state, “Total REE oxide content of samples of the groundmass material, which are not diluted with lithic fragments, average about 20 weight percent.” Seeger and others (2001, p. 2) state, “Total REE oxide concentrations of grab samples range from about 2.5 to 19 weight percent.” Bulk sampling by the U.S. Bureau of Mines found REE oxides concentrations ranging from 7 to 25 weight percent and an average of 12 weight percent (Vierrether and Cornell, 1993).

Regions containing this locality

North America PlateTectonic Plate

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Standard Detailed Strunz Dana Chemical Elements

Mineral List


53 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: R&M 73:2 pp 98-117; C. W. Whitten and R. J. Yancey (1991) Characterization of the Rare-earth Mineralogy at the Pea Ridge Deposit, Missouri. USBM Report of Investigations 9331.
Afwillite
Formula: Ca3(HSiO4)2 · 2H2O
Reference: R&M 73:2 pp 98-117
Albite
Formula: Na(AlSi3O8)
Reference: R&M 73:2 pp 98-117
'Allanite Group'
Formula: {A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
Reference: C. W. Whitten and R. J. Yancey (1991) Characterization of the Rare-earth Mineralogy at the Pea Ridge Deposit, Missouri. USBM Report of Investigations 9331.
Altaite
Formula: PbTe
Reference: R&M 73:2 pp 98-117
Anatase
Formula: TiO2
Reference: R&M 73:2 pp 98-117
Andradite
Formula: Ca3Fe3+2(SiO4)3
Reference: R&M 73:2 pp 98-117
Anhydrite
Formula: CaSO4
Reference: R&M 73:2 pp 98-117
Antigorite
Formula: Mg3(Si2O5)(OH)4
Reference: R&M 73:2 pp 98-117
'Apatite'
Reference: USGS Open File report 2010-5220; C. W. Whitten and R. J. Yancey (1991) Characterization of the Rare-earth Mineralogy at the Pea Ridge Deposit, Missouri. USBM Report of Investigations 9331.; U.S. Geological Survey,2005,Mineral Resources Data System ,U.S. Geological Survey,Reston, Virginia
Baryte
Formula: BaSO4
Reference: R&M 73:2 pp 98-117; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; USGS Open File report 2010-5220; C. W. Whitten and R. J. Yancey (1991) Characterization of the Rare-earth Mineralogy at the Pea Ridge Deposit, Missouri. USBM Report of Investigations 9331.; U.S. Geological Survey,2005,Mineral Resources Data System ,U.S. Geological Survey,Reston, Virginia
'Bastnäsite'
Reference: R&M 73:2 pp 98-117; USGS Open File report 2010-5220
Bazzite
Formula: Be3Sc2(Si6O18)
Reference: R&M 73:2 pp 98-117
'Biotite'
Reference: R&M 73:2 pp 98-117
Bornite
Formula: Cu5FeS4
Reference: R&M 73:2 pp 98-117
Britholite-(Ce)
Formula: (Ce,Ca)5(SiO4)3OH
Reference: USGS Open File report 2010-5220
Calcite
Formula: CaCO3
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; USGS Open File report 2010-5220; C. W. Whitten and R. J. Yancey (1991) Characterization of the Rare-earth Mineralogy at the Pea Ridge Deposit, Missouri. USBM Report of Investigations 9331.; U.S. Geological Survey,2005,Mineral Resources Data System ,U.S. Geological Survey,Reston, Virginia
Cassiterite
Formula: SnO2
Reference: R&M 73:2 pp 98-117; C. W. Whitten and R. J. Yancey (1991) Characterization of the Rare-earth Mineralogy at the Pea Ridge Deposit, Missouri. USBM Report of Investigations 9331.
Chalcocite
Formula: Cu2S
Reference: R&M 73:2 pp 98-117
Chalcopyrite
Formula: CuFeS2
Reference: C. W. Whitten and R. J. Yancey (1991) Characterization of the Rare-earth Mineralogy at the Pea Ridge Deposit, Missouri. USBM Report of Investigations 9331.
Chamosite
Formula: (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Reference: R&M 73:2 pp 98-117
'Chlorite Group'
Reference: R&M 73:2 pp 98-117; USGS Open File report 2010-5220
Cobaltite
Formula: CoAsS
Reference: R&M 73:2 pp 98-117
Covellite
Formula: CuS
Reference: C. W. Whitten and R. J. Yancey (1991) Characterization of the Rare-earth Mineralogy at the Pea Ridge Deposit, Missouri. USBM Report of Investigations 9331.
Dolomite
Formula: CaMg(CO3)2
Reference: R&M 73:2 pp 98-117
'Electrum'
Formula: (Au, Ag)
Reference: R&M 73:2 pp 98-117
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: R&M 73:2 pp 98-117
'Feldspar Group'
Reference: C. W. Whitten and R. J. Yancey (1991) Characterization of the Rare-earth Mineralogy at the Pea Ridge Deposit, Missouri. USBM Report of Investigations 9331.
Fluorapatite
Formula: Ca5(PO4)3F
Reference: Laurence Nuelle (2001) Mineral News, 17, #9, 5.
Fluorite
Formula: CaF2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; C. W. Whitten and R. J. Yancey (1991) Characterization of the Rare-earth Mineralogy at the Pea Ridge Deposit, Missouri. USBM Report of Investigations 9331.; U.S. Geological Survey,2005,Mineral Resources Data System ,U.S. Geological Survey,Reston, Virginia
Galena
Formula: PbS
Reference: R&M 73:2 pp 98-117; C. W. Whitten and R. J. Yancey (1991) Characterization of the Rare-earth Mineralogy at the Pea Ridge Deposit, Missouri. USBM Report of Investigations 9331.
Glauconite
Formula: (K,Na)(Mg,Fe2+,Fe3+)(Fe3+,Al)(Si,Al)4O10(OH)2
Reference: R&M 73:2 pp 98-117
Gold
Formula: Au
Reference: R&M 73:2 pp 98-117
Grunerite
Formula: ☐{Fe2+2}{Fe2+5}(Si8O22)(OH)2
Reference: R&M 73:2 pp 98-117
Gypsum
Formula: CaSO4 · 2H2O
Reference: R&M 73:2 pp 98-117
Hematite
Formula: Fe2O3
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; USGS Open File report 2010-5220; C. W. Whitten and R. J. Yancey (1991) Characterization of the Rare-earth Mineralogy at the Pea Ridge Deposit, Missouri. USBM Report of Investigations 9331.; U.S. Geological Survey,2005,Mineral Resources Data System ,U.S. Geological Survey,Reston, Virginia
Hematite var: Martite
Formula: Fe2O3
Reference: Rocks & Minerals, March 1998.
Hessite
Formula: Ag2Te
Reference: R&M 73:2 pp 98-117
'Hornblende'
Reference: R&M 73:2 pp 98-117
'Hypersthene'
Formula: (Mg,Fe)SiO3
Reference: R&M 73:2 pp 98-117
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Laurence Nuelle (2001) Mineral News, 17, #9, 5.; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; USGS Open File report 2010-5220; C. W. Whitten and R. J. Yancey (1991) Characterization of the Rare-earth Mineralogy at the Pea Ridge Deposit, Missouri. USBM Report of Investigations 9331.; U.S. Geological Survey,2005,Mineral Resources Data System ,U.S. Geological Survey,Reston, Virginia
Melonite
Formula: NiTe2
Reference: R&M 73:2 pp 98-117
Millerite
Formula: NiS
Reference: R&M 73:2 pp 98-117
Molybdenite
Formula: MoS2
Reference: R&M 73:2 pp 98-117
'Monazite'
Reference: R&M 73:2 pp 98-117; USGS Open File report 2010-5220; C. W. Whitten and R. J. Yancey (1991) Characterization of the Rare-earth Mineralogy at the Pea Ridge Deposit, Missouri. USBM Report of Investigations 9331.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: R&M 73:2 pp 98-117
Orthoclase
Formula: K(AlSi3O8)
Reference: R&M 73:2 pp 98-117
Palygorskite
Formula: (Mg,Al)5(Si,Al)8O20(OH)2 · 8H2O
Reference: R&M 73:2 pp 98-117
'Parisite'
Reference: R&M 73:2 pp 98-117
Pyrite
Formula: FeS2
Reference: R&M 73:2 pp 98-117; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; C. W. Whitten and R. J. Yancey (1991) Characterization of the Rare-earth Mineralogy at the Pea Ridge Deposit, Missouri. USBM Report of Investigations 9331.; U.S. Geological Survey,2005,Mineral Resources Data System ,U.S. Geological Survey,Reston, Virginia
Quartz
Formula: SiO2
Reference: R&M 73:2 pp 98-117; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; C. W. Whitten and R. J. Yancey (1991) Characterization of the Rare-earth Mineralogy at the Pea Ridge Deposit, Missouri. USBM Report of Investigations 9331.; U.S. Geological Survey,2005,Mineral Resources Data System ,U.S. Geological Survey,Reston, Virginia
Quartz var: Amethyst
Formula: SiO2
Reference: R&M 73:2 pp 98-117
Riebeckite
Formula: ◻[Na2][Fe2+3Fe3+2]Si8O22(OH)2
Reference: R&M 73:2 pp 98-117
Rutile
Formula: TiO2
Reference: R&M 73:2 pp 98-117; C. W. Whitten and R. J. Yancey (1991) Characterization of the Rare-earth Mineralogy at the Pea Ridge Deposit, Missouri. USBM Report of Investigations 9331.
Sepiolite
Formula: Mg4(Si6O15)(OH)2 · 6H2O
Reference: R&M 73:2 pp 98-117
'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Reference: R&M 73:2 pp 98-117
Sphalerite
Formula: ZnS
Reference: R&M 73:2 pp 98-117
Sylvanite
Formula: (Au,Ag)2Te4
Reference: R&M 73:2 pp 98-117
'Synchysite'
Reference: R&M 73:2 pp 98-117
Tengerite-(Y)
Formula: Y2(CO3)3 · 2-3H2O
Reference: R&M 73:2 pp 98-117
Thorite
Formula: Th(SiO4)
Reference: R&M 73:2 pp 98-117; C. W. Whitten and R. J. Yancey (1991) Characterization of the Rare-earth Mineralogy at the Pea Ridge Deposit, Missouri. USBM Report of Investigations 9331.
Titanite
Formula: CaTi(SiO4)O
Reference: R&M 73:2 pp 98-117
Topaz
Formula: Al2(SiO4)(F,OH)2
Reference: R&M 73:2 pp 98-117
'Tourmaline'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Reference: R&M 73:2 pp 98-117
Tremolite
Formula: ☐{Ca2}{Mg5}(Si8O22)(OH)2
Reference: R&M 73:2 pp 98-117
Vesuvianite
Formula: (Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Reference: R&M 73:2 pp 98-117
'Xenotime'
Reference: C. W. Whitten and R. J. Yancey (1991) Characterization of the Rare-earth Mineralogy at the Pea Ridge Deposit, Missouri. USBM Report of Investigations 9331.
Xenotime-(Y)
Formula: Y(PO4)
Reference: R&M 73:2 pp 98-117; USGS Open File report 2010-5220
Zircon
Formula: Zr(SiO4)
Reference: R&M 73:2 pp 98-117
Zoisite
Formula: {Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Reference: R&M 73:2 pp 98-117

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
'Electrum'1.AA.05(Au, Ag)
Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
Altaite2.CD.10PbTe
Bornite2.BA.15Cu5FeS4
Chalcocite2.BA.05Cu2S
Chalcopyrite2.CB.10aCuFeS2
Cobaltite2.EB.25CoAsS
Covellite2.CA.05aCuS
Galena2.CD.10PbS
Hessite2.BA.60Ag2Te
Melonite2.EA.20NiTe2
Millerite2.CC.20NiS
Molybdenite2.EA.30MoS2
Pyrite2.EB.05aFeS2
Sphalerite2.CB.05aZnS
Sylvanite2.EA.05(Au,Ag)2Te4
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Anatase4.DD.05TiO2
Cassiterite4.DB.05SnO2
Hematite4.CB.05Fe2O3
var: Martite4.CB.05Fe2O3
Magnetite4.BB.05Fe2+Fe3+2O4
Quartz4.DA.05SiO2
var: Amethyst4.DA.05SiO2
Rutile4.DB.05TiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Dolomite5.AB.10CaMg(CO3)2
Tengerite-(Y)5.CC.10Y2(CO3)3 · 2-3H2O
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Anhydrite7.AD.30CaSO4
Baryte7.AD.35BaSO4
Gypsum7.CD.40CaSO4 · 2H2O
Group 8 - Phosphates, Arsenates and Vanadates
Fluorapatite8.BN.05Ca5(PO4)3F
Xenotime-(Y)8.AD.35Y(PO4)
Group 9 - Silicates
Actinolite9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Afwillite9.AG.75Ca3(HSiO4)2 · 2H2O
Albite9.FA.35Na(AlSi3O8)
Andradite9.AD.25Ca3Fe3+2(SiO4)3
Antigorite9.ED.15Mg3(Si2O5)(OH)4
Bazzite9.CJ.05Be3Sc2(Si6O18)
Britholite-(Ce)9.AH.25(Ce,Ca)5(SiO4)3OH
Chamosite9.EC.55(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Grunerite9.DE.05☐{Fe2+2}{Fe2+5}(Si8O22)(OH)2
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Orthoclase9.FA.30K(AlSi3O8)
Palygorskite9.EE.20(Mg,Al)5(Si,Al)8O20(OH)2 · 8H2O
Riebeckite9.DE.25◻[Na2][Fe2+3Fe3+2]Si8O22(OH)2
Sepiolite9.EE.25Mg4(Si6O15)(OH)2 · 6H2O
Thorite9.AD.30Th(SiO4)
Titanite9.AG.15CaTi(SiO4)O
Topaz9.AF.35Al2(SiO4)(F,OH)2
Tremolite9.DE.10☐{Ca2}{Mg5}(Si8O22)(OH)2
Vesuvianite9.BG.35(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Zircon9.AD.30Zr(SiO4)
Zoisite9.BG.10{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Unclassified Minerals, Rocks, etc.
'Allanite Group'-{A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
'Apatite'-
'Bastnäsite'-
'Biotite'-
'Chlorite Group'-
'Feldspar Group'-
Glauconite-(K,Na)(Mg,Fe2+,Fe3+)(Fe3+,Al)(Si,Al)4O10(OH)2
'Hornblende'-
'Hypersthene'-(Mg,Fe)SiO3
'Monazite'-
'Parisite'-
'Serpentine Subgroup'-D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
'Synchysite'-
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z
'Xenotime'-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Gold1.1.1.1Au
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Chalcocite2.4.7.1Cu2S
Hessite2.4.2.1Ag2Te
AmBnXp, with (m+n):p = 3:2
Bornite2.5.2.1Cu5FeS4
AmXp, with m:p = 1:1
Altaite2.8.1.3PbTe
Covellite2.8.12.1CuS
Galena2.8.1.1PbS
Millerite2.8.16.1NiS
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Cobaltite2.12.3.1CoAsS
Melonite2.12.14.1NiTe2
Molybdenite2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Sylvanite2.12.13.3(Au,Ag)2Te4
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
AX2
Anatase4.4.4.1TiO2
Cassiterite4.4.1.5SnO2
Rutile4.4.1.1TiO2
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)
Calcite14.1.1.1CaCO3
AB(XO3)2
Dolomite14.2.1.1CaMg(CO3)2
Group 15 - HYDRATED NORMAL CARBONATES
AmBn(XO3)p·xH2O, with (m+n):p < 1:1
Tengerite-(Y)15.4.3.1Y2(CO3)3 · 2-3H2O
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Anhydrite28.3.2.1CaSO4
Baryte28.3.1.1BaSO4
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Andradite51.4.3b.1Ca3Fe3+2(SiO4)3
Insular SiO4 Groups Only with cations in >[6] coordination
Thorite51.5.2.3Th(SiO4)
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 [6] coordination only
Topaz52.3.1.1Al2(SiO4)(F,OH)2
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Afwillite52.4.7.1Ca3(HSiO4)2 · 2H2O
Britholite-(Ce)52.4.9.1(Ce,Ca)5(SiO4)3OH
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)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Vesuvianite58.2.4.1(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Zoisite58.2.1b.1{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Bazzite61.1.1.2Be3Sc2(Si6O18)
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Tremolite66.1.3a.1☐{Ca2}{Mg5}(Si8O22)(OH)2
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 1:1 layers
Antigorite71.1.2a.1Mg3(Si2O5)(OH)4
Sheets of 6-membered rings with 2:1 layers
Glauconite71.2.2a.5(K,Na)(Mg,Fe2+,Fe3+)(Fe3+,Al)(Si,Al)4O10(OH)2
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Sheets of 6-membered rings interlayered 1:1, 2:1, and octahedra
Chamosite71.4.1.7(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Group 74 - PHYLLOSILICATES Modulated Layers
Modulated Layers with joined strips
Palygorskite74.3.1a.1(Mg,Al)5(Si,Al)8O20(OH)2 · 8H2O
Sepiolite74.3.1b.1Mg4(Si6O15)(OH)2 · 6H2O
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)
Orthoclase76.1.1.1K(AlSi3O8)
Unclassified Minerals, Mixtures, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
'Allanite Group'-{A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
'Apatite'-
'Bastnäsite'-
'Biotite'-
'Chlorite Group'-
'Electrum'-(Au, Ag)
'Feldspar Group'-
Grunerite-☐{Fe2+2}{Fe2+5}(Si8O22)(OH)2
Hematite
var: Martite
-Fe2O3
'Hornblende'-
'Hypersthene'-(Mg,Fe)SiO3
'Monazite'-
'Parisite'-
Quartz
var: Amethyst
-SiO2
Riebeckite-◻[Na2][Fe2+3Fe3+2]Si8O22(OH)2
'Serpentine Subgroup'-D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
'Synchysite'-
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z
'Xenotime'-
Xenotime-(Y)-Y(PO4)

List of minerals for each chemical element

HHydrogen
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
H AfwilliteCa3(HSiO4)2 · 2H2O
H AntigoriteMg3(Si2O5)(OH)4
H BazziteBe3Sc2(Si6O18)
H Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H Glauconite(K,Na)(Mg,Fe2+,Fe3+)(Fe3+,Al)(Si,Al)4O10(OH)2
H Grunerite☐{Fe22+}{Fe52+}(Si8O22)(OH)2
H GypsumCaSO4 · 2H2O
H MuscoviteKAl2(AlSi3O10)(OH)2
H Palygorskite(Mg,Al)5(Si,Al)8O20(OH)2 · 8H2O
H Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
H SepioliteMg4(Si6O15)(OH)2 · 6H2O
H Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
H Tengerite-(Y)Y2(CO3)3 · 2-3H2O
H TopazAl2(SiO4)(F,OH)2
H Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
H Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
H Zoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
H Britholite-(Ce)(Ce,Ca)5(SiO4)3OH
H Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
BeBeryllium
Be BazziteBe3Sc2(Si6O18)
BBoron
B TourmalineA(D3)G6(T6O18)(BO3)3X3Z
B Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
CCarbon
C CalciteCaCO3
C DolomiteCaMg(CO3)2
C Tengerite-(Y)Y2(CO3)3 · 2-3H2O
OOxygen
O CalciteCaCO3
O HematiteFe2O3
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O AfwilliteCa3(HSiO4)2 · 2H2O
O AlbiteNa(AlSi3O8)
O AnataseTiO2
O AndraditeCa3Fe23+(SiO4)3
O AnhydriteCaSO4
O AntigoriteMg3(Si2O5)(OH)4
O BaryteBaSO4
O BazziteBe3Sc2(Si6O18)
O CassiteriteSnO2
O Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
O DolomiteCaMg(CO3)2
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O Glauconite(K,Na)(Mg,Fe2+,Fe3+)(Fe3+,Al)(Si,Al)4O10(OH)2
O Grunerite☐{Fe22+}{Fe52+}(Si8O22)(OH)2
O GypsumCaSO4 · 2H2O
O Hypersthene(Mg,Fe)SiO3
O MuscoviteKAl2(AlSi3O10)(OH)2
O OrthoclaseK(AlSi3O8)
O Palygorskite(Mg,Al)5(Si,Al)8O20(OH)2 · 8H2O
O QuartzSiO2
O Quartz (var: Amethyst)SiO2
O Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
O RutileTiO2
O SepioliteMg4(Si6O15)(OH)2 · 6H2O
O Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
O Tengerite-(Y)Y2(CO3)3 · 2-3H2O
O ThoriteTh(SiO4)
O TitaniteCaTi(SiO4)O
O TopazAl2(SiO4)(F,OH)2
O TourmalineA(D3)G6(T6O18)(BO3)3X3Z
O Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
O Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
O Xenotime-(Y)Y(PO4)
O ZirconZr(SiO4)
O Zoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
O Hematite (var: Martite)Fe2O3
O MagnetiteFe2+Fe23+O4
O FluorapatiteCa5(PO4)3F
O Britholite-(Ce)(Ce,Ca)5(SiO4)3OH
O Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
FFluorine
F FluoriteCaF2
F TopazAl2(SiO4)(F,OH)2
F Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
F FluorapatiteCa5(PO4)3F
NaSodium
Na AlbiteNa(AlSi3O8)
Na BazziteBe3Sc2(Si6O18)
Na Glauconite(K,Na)(Mg,Fe2+,Fe3+)(Fe3+,Al)(Si,Al)4O10(OH)2
Na Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
Na Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
MgMagnesium
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Mg AntigoriteMg3(Si2O5)(OH)4
Mg BazziteBe3Sc2(Si6O18)
Mg Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Mg DolomiteCaMg(CO3)2
Mg Glauconite(K,Na)(Mg,Fe2+,Fe3+)(Fe3+,Al)(Si,Al)4O10(OH)2
Mg Hypersthene(Mg,Fe)SiO3
Mg Palygorskite(Mg,Al)5(Si,Al)8O20(OH)2 · 8H2O
Mg SepioliteMg4(Si6O15)(OH)2 · 6H2O
Mg Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Mg Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Mg Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
AlAluminium
Al AlbiteNa(AlSi3O8)
Al Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al Glauconite(K,Na)(Mg,Fe2+,Fe3+)(Fe3+,Al)(Si,Al)4O10(OH)2
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al OrthoclaseK(AlSi3O8)
Al Palygorskite(Mg,Al)5(Si,Al)8O20(OH)2 · 8H2O
Al Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Al TopazAl2(SiO4)(F,OH)2
Al Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Al Zoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
SiSilicon
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Si AfwilliteCa3(HSiO4)2 · 2H2O
Si AlbiteNa(AlSi3O8)
Si AndraditeCa3Fe23+(SiO4)3
Si AntigoriteMg3(Si2O5)(OH)4
Si BazziteBe3Sc2(Si6O18)
Si Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si Glauconite(K,Na)(Mg,Fe2+,Fe3+)(Fe3+,Al)(Si,Al)4O10(OH)2
Si Grunerite☐{Fe22+}{Fe52+}(Si8O22)(OH)2
Si Hypersthene(Mg,Fe)SiO3
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si OrthoclaseK(AlSi3O8)
Si Palygorskite(Mg,Al)5(Si,Al)8O20(OH)2 · 8H2O
Si QuartzSiO2
Si Quartz (var: Amethyst)SiO2
Si Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
Si SepioliteMg4(Si6O15)(OH)2 · 6H2O
Si Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Si ThoriteTh(SiO4)
Si TitaniteCaTi(SiO4)O
Si TopazAl2(SiO4)(F,OH)2
Si Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Si Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Si ZirconZr(SiO4)
Si Zoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Si Britholite-(Ce)(Ce,Ca)5(SiO4)3OH
Si Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
PPhosphorus
P Xenotime-(Y)Y(PO4)
P FluorapatiteCa5(PO4)3F
SSulfur
S ChalcopyriteCuFeS2
S AnhydriteCaSO4
S BaryteBaSO4
S BorniteCu5FeS4
S ChalcociteCu2S
S CobaltiteCoAsS
S GalenaPbS
S GypsumCaSO4 · 2H2O
S MilleriteNiS
S MolybdeniteMoS2
S PyriteFeS2
S SphaleriteZnS
S CovelliteCuS
KPotassium
K Glauconite(K,Na)(Mg,Fe2+,Fe3+)(Fe3+,Al)(Si,Al)4O10(OH)2
K MuscoviteKAl2(AlSi3O10)(OH)2
K OrthoclaseK(AlSi3O8)
CaCalcium
Ca CalciteCaCO3
Ca FluoriteCaF2
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Ca AfwilliteCa3(HSiO4)2 · 2H2O
Ca AndraditeCa3Fe23+(SiO4)3
Ca AnhydriteCaSO4
Ca DolomiteCaMg(CO3)2
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca GypsumCaSO4 · 2H2O
Ca TitaniteCaTi(SiO4)O
Ca Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Ca Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Ca Zoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Ca FluorapatiteCa5(PO4)3F
Ca Britholite-(Ce)(Ce,Ca)5(SiO4)3OH
ScScandium
Sc BazziteBe3Sc2(Si6O18)
TiTitanium
Ti AnataseTiO2
Ti RutileTiO2
Ti TitaniteCaTi(SiO4)O
MnManganese
Mn Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
FeIron
Fe ChalcopyriteCuFeS2
Fe HematiteFe2O3
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Fe AndraditeCa3Fe23+(SiO4)3
Fe BazziteBe3Sc2(Si6O18)
Fe BorniteCu5FeS4
Fe Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe Glauconite(K,Na)(Mg,Fe2+,Fe3+)(Fe3+,Al)(Si,Al)4O10(OH)2
Fe Grunerite☐{Fe22+}{Fe52+}(Si8O22)(OH)2
Fe Hypersthene(Mg,Fe)SiO3
Fe PyriteFeS2
Fe Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
Fe Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Fe Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Fe Hematite (var: Martite)Fe2O3
Fe MagnetiteFe2+Fe23+O4
CoCobalt
Co CobaltiteCoAsS
NiNickel
Ni MeloniteNiTe2
Ni MilleriteNiS
Ni Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
CuCopper
Cu ChalcopyriteCuFeS2
Cu BorniteCu5FeS4
Cu ChalcociteCu2S
Cu CovelliteCuS
ZnZinc
Zn Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Zn SphaleriteZnS
AsArsenic
As CobaltiteCoAsS
YYttrium
Y Tengerite-(Y)Y2(CO3)3 · 2-3H2O
Y Xenotime-(Y)Y(PO4)
ZrZirconium
Zr ZirconZr(SiO4)
MoMolybdenum
Mo MolybdeniteMoS2
AgSilver
Ag Electrum(Au, Ag)
Ag HessiteAg2Te
Ag Sylvanite(Au,Ag)2Te4
SnTin
Sn CassiteriteSnO2
TeTellurium
Te AltaitePbTe
Te HessiteAg2Te
Te MeloniteNiTe2
Te Sylvanite(Au,Ag)2Te4
BaBarium
Ba BaryteBaSO4
CeCerium
Ce Britholite-(Ce)(Ce,Ca)5(SiO4)3OH
AuGold
Au GoldAu
Au Electrum(Au, Ag)
Au Sylvanite(Au,Ag)2Te4
PbLead
Pb AltaitePbTe
Pb GalenaPbS
ThThorium
Th ThoriteTh(SiO4)

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

Paleozoic
251.902 - 541 Ma



ID: 3187973
Paleozoic sedimentary rocks

Age: Phanerozoic (251.902 - 541 Ma)

Lithology: Sedimentary rocks

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]

Early Ordovician
470 - 485.4 Ma



ID: 2742491
Gasconade Dolomite

Age: Early Ordovician (470 - 485.4 Ma)

Stratigraphic Name: Gasconade Dolomite

Description: Coarse - crystalline cherty dolomite with a basal Gunter Sandstone Member.

Comments: IN SOUTHEAST MO-Gasconade Dolomite- (700 ft max) coarsely crystalline cherty dolomite with basal sandstone member; Gunter Sandstone Member- (30 ft. max) quartzose sandstone. Host to barite deposits on the northwest flank of Ozark Uplift. Original map source: Missouri Department of Natural Resources, Geological Survey and Resource Assessment Division, 2005, Bedrock geology, State of Missouri: Missouri Department of Natural Resources, scale 1:500,000.

Lithology: Major:{dolostone}, Minor:{sandstone}

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)
Mining Annual Review (1985) 325.
Whitten, C.W., Yancey, R.J. (1991) Characterization of the Rare-Earth Mineralogy at the Pea Ridge Deposit, Missouri. United States Department of the Interior, Bureau of Mines, Report of Investigations, RI 9331.
Vierrether, C.W., Cornell, W.L. (1993) Rare-Earth Occurrences in the Pea Ridge Tailings. United States Department of the Interior, Bureau of Mines, Report of Investigations RI 9453, 10 pages.
Nuelle, L.M. (1998) Minerals of the Pea Ridge Mine, Washington County, Missouri. Rocks & Minerals, 73:2, 90-97.
Long, K.R., Van Gosen, B.S., Foley, N.K., Cordier, D. (2010) The Principal Rare Earth Elements Deposits of the United States—A Summary of Domestic Deposits and a Global Perspective. United States Geological Survey Scientific Investigations, Report 2010–5220, 96 pages.
Grauch, R.I., Verplanck, P.L., Seeger, C.M., Budahn, J.R., Van Gosen, B.S. ()Chemistry of Selected Core Samples, Concentrate, Tailings, and Tailings Pond Waters: Pea Ridge Iron (-Lanthanide-Gold) Deposit, Washington County, Missouri. United States Department of the Interior, U.S. Geological Survey, Open-File Report 2010–1080.

External Links



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