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Campo Formoso ultramafic complex, Bahia, Brazili
Regional Level Types
Campo Formoso ultramafic complexComplex
BahiaState
BrazilCountry

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Latitude & Longitude (WGS84):
10° 32' 48'' South , 40° 22' 4'' West
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:


The Campo Formoso stratiform intrusive is part of the Jacurici Complex of Paleoproterozoic age and consists of a tabular body of ultramafic rocks about 40 km long and 100-1100 m wide. It hosts the most prominent chromite deposits of Brazil. At least seven chromitite layers, up to more than 10 m thick, have been discovered in the SW limb of the intrusion, and have been mined at several places.

Regions containing this locality

South America PlateTectonic Plate
South AmericaContinent

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


26 valid minerals.

Detailed Mineral List:

Antimony
Formula: Sb
Reference: F. Zaccarini, G. Garuti and R.F. Martin (2006): Exotic accessory minerals in layered chromitites of the Campo Formoso complex (Brazil). Geologica Acta 4, 461-469. [http://www.geologica-acta.com/pdf/vol0404a04.pdf]
'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
Reference: F. Zaccarini, G. Garuti and R.F. Martin (2006): Exotic accessory minerals in layered chromitites of the Campo Formoso complex (Brazil). Geologica Acta 4, 461-469. [http://www.geologica-acta.com/pdf/vol0404a04.pdf]
Bismuthinite
Formula: Bi2S3
Reference: F. Zaccarini, G. Garuti and R.F. Martin (2006): Exotic accessory minerals in layered chromitites of the Campo Formoso complex (Brazil). Geologica Acta 4, 461-469. [http://www.geologica-acta.com/pdf/vol0404a04.pdf]
Chromite
Formula: Fe2+Cr3+2O4
Reference: Sauer, J.R. (1982) Brazil, Paradise of Gemstones. Gemological Institute of America, 135 pp. (p. 24).; Zaccarini, F., Garuti, G., and Martin, R.F. (2006) Exotic accessory minerals in layered chromitites of the Campo Formoso complex (Brazil). Geologica Acta, 4, 461-469. [http://www.geologica-acta.com/pdf/vol0404a04.pdf]; 33rd International Geological Congress (2008) session MPM-04 Platinum-group mineralogy: Diversity of Platinum group minerals (PGM) in chromitites from Brazil, preliminary results.;
Chrysotile
Formula: Mg3(Si2O5)(OH)4
Reference: F. Zaccarini, G. Garuti and R.F. Martin (2006): Exotic accessory minerals in layered chromitites of the Campo Formoso complex (Brazil). Geologica Acta 4, 461-469. [http://www.geologica-acta.com/pdf/vol0404a04.pdf]
Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
Reference: F. Zaccarini, G. Garuti and R.F. Martin (2006): Exotic accessory minerals in layered chromitites of the Campo Formoso complex (Brazil). Geologica Acta 4, 461-469. [http://www.geologica-acta.com/pdf/vol0404a04.pdf]
Dolomite
Formula: CaMg(CO3)2
Reference: F. Zaccarini, G. Garuti and R.F. Martin (2006): Exotic accessory minerals in layered chromitites of the Campo Formoso complex (Brazil). Geologica Acta 4, 461-469. [http://www.geologica-acta.com/pdf/vol0404a04.pdf]
Erlichmanite
Formula: OsS2
Reference: 33rd International Geological Congress (2008) session MPM-04 Platinum-group mineralogy: Diversity of Platinum group minerals (PGM) in chromitites from Brazil, preliminary results
Galena
Formula: PbS
Reference: F. Zaccarini, G. Garuti and R.F. Martin (2006): Exotic accessory minerals in layered chromitites of the Campo Formoso complex (Brazil). Geologica Acta 4, 461-469. [http://www.geologica-acta.com/pdf/vol0404a04.pdf]
Goethite
Formula: α-Fe3+O(OH)
Reference: F. Zaccarini, G. Garuti and R.F. Martin (2006): Exotic accessory minerals in layered chromitites of the Campo Formoso complex (Brazil). Geologica Acta 4, 461-469. [http://www.geologica-acta.com/pdf/vol0404a04.pdf]
Hollingworthite
Formula: (Rh,Pt,Pd)AsS
Reference: 33rd International Geological Congress (2008) session MPM-04 Platinum-group mineralogy: Diversity of Platinum group minerals (PGM) in chromitites from Brazil, preliminary results
Irarsite
Formula: (Ir,Ru,Rh,Pt)AsS
Reference: 33rd International Geological Congress (2008) session MPM-04 Platinum-group mineralogy: Diversity of Platinum group minerals (PGM) in chromitites from Brazil, preliminary results
Kaolinite
Formula: Al2(Si2O5)(OH)4
Reference: F. Zaccarini, G. Garuti and R.F. Martin (2006): Exotic accessory minerals in layered chromitites of the Campo Formoso complex (Brazil). Geologica Acta 4, 461-469. [http://www.geologica-acta.com/pdf/vol0404a04.pdf]
Laurite
Formula: RuS2
Reference: 33rd International Geological Congress (2008) session MPM-04 Platinum-group mineralogy: Diversity of Platinum group minerals (PGM) in chromitites from Brazil, preliminary results
Lizardite
Formula: Mg3(Si2O5)(OH)4
Reference: F. Zaccarini, G. Garuti and R.F. Martin (2006): Exotic accessory minerals in layered chromitites of the Campo Formoso complex (Brazil). Geologica Acta 4, 461-469. [http://www.geologica-acta.com/pdf/vol0404a04.pdf]
Magnesite
Formula: MgCO3
Reference: F. Zaccarini, G. Garuti and R.F. Martin (2006): Exotic accessory minerals in layered chromitites of the Campo Formoso complex (Brazil). Geologica Acta 4, 461-469. [http://www.geologica-acta.com/pdf/vol0404a04.pdf]
Monazite-(Ce)
Formula: Ce(PO4)
Reference: F. Zaccarini, G. Garuti and R.F. Martin (2006): Exotic accessory minerals in layered chromitites of the Campo Formoso complex (Brazil). Geologica Acta 4, 461-469. [http://www.geologica-acta.com/pdf/vol0404a04.pdf]
Monazite-(La)
Formula: La(PO4)
Reference: F. Zaccarini, G. Garuti and R.F. Martin (2006): Exotic accessory minerals in layered chromitites of the Campo Formoso complex (Brazil). Geologica Acta 4, 461-469. [http://www.geologica-acta.com/pdf/vol0404a04.pdf]
Nontronite
Formula: Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Reference: F. Zaccarini, G. Garuti and R.F. Martin (2006): Exotic accessory minerals in layered chromitites of the Campo Formoso complex (Brazil). Geologica Acta 4, 461-469. [http://www.geologica-acta.com/pdf/vol0404a04.pdf]
Opal
Formula: SiO2 · nH2O
Reference: F. Zaccarini, G. Garuti and R.F. Martin (2006): Exotic accessory minerals in layered chromitites of the Campo Formoso complex (Brazil). Geologica Acta 4, 461-469. [http://www.geologica-acta.com/pdf/vol0404a04.pdf]
Osmium
Formula: (Os,Ir,Ru)
Reference: 33rd International Geological Congress (2008) session MPM-04 Platinum-group mineralogy: Diversity of Platinum group minerals (PGM) in chromitites from Brazil, preliminary results
Pentlandite
Formula: (FexNiy)Σ9S8
Reference: F. Zaccarini, G. Garuti and R.F. Martin (2006): Exotic accessory minerals in layered chromitites of the Campo Formoso complex (Brazil). Geologica Acta 4, 461-469. [http://www.geologica-acta.com/pdf/vol0404a04.pdf]
Quartz
Formula: SiO2
Reference: F. Zaccarini, G. Garuti and R.F. Martin (2006): Exotic accessory minerals in layered chromitites of the Campo Formoso complex (Brazil). Geologica Acta 4, 461-469. [http://www.geologica-acta.com/pdf/vol0404a04.pdf]
Ruarsite
Formula: (Ru,Os)AsS
Reference: 33rd International Geological Congress (2008) session MPM-04 Platinum-group mineralogy: Diversity of Platinum group minerals (PGM) in chromitites from Brazil, preliminary results
Stichtite
Formula: Mg6Cr3+2(OH)16[CO3] · 4H2O
Reference: Boukili, H., Novikoff, A., Besnus, Y., Soubies, F., and Queiroz, C. (1983): Sciences Géologiques 72, 19-28.; F. Zaccarini, G. Garuti and R.F. Martin (2006): Exotic accessory minerals in layered chromitites of the Campo Formoso complex (Brazil). Geologica Acta 4, 461-469. [http://www.geologica-acta.com/pdf/vol0404a04.pdf]
Talc
Formula: Mg3Si4O10(OH)2
Reference: F. Zaccarini, G. Garuti and R.F. Martin (2006): Exotic accessory minerals in layered chromitites of the Campo Formoso complex (Brazil). Geologica Acta 4, 461-469. [http://www.geologica-acta.com/pdf/vol0404a04.pdf]
'Unnamed (Pb-Sb Alloy)'
Formula: Pb-Sb
Reference: F. Zaccarini, G. Garuti and R.F. Martin (2006): Exotic accessory minerals in layered chromitites of the Campo Formoso complex (Brazil). Geologica Acta 4, 461-469. [http://www.geologica-acta.com/pdf/vol0404a04.pdf]
Volkonskoite
Formula: Ca0.3(Cr,Mg,Fe)2((Si,Al)4O10)(OH)2 · 4H2O
Reference: F. Zaccarini, G. Garuti and R.F. Martin (2006): Exotic accessory minerals in layered chromitites of the Campo Formoso complex (Brazil). Geologica Acta 4, 461-469. [http://www.geologica-acta.com/pdf/vol0404a04.pdf]

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Antimony1.CA.05Sb
Osmium1.AF.05(Os,Ir,Ru)
Group 2 - Sulphides and Sulfosalts
Bismuthinite2.DB.05Bi2S3
Erlichmanite2.EB.05aOsS2
Galena2.CD.10PbS
Hollingworthite2.EB.25(Rh,Pt,Pd)AsS
Irarsite2.EB.25(Ir,Ru,Rh,Pt)AsS
Laurite2.EB.05aRuS2
Pentlandite2.BB.15(FexNiy)Σ9S8
Ruarsite2.EB.20(Ru,Os)AsS
Group 4 - Oxides and Hydroxides
Chromite4.BB.05Fe2+Cr3+2O4
Goethite4.00.α-Fe3+O(OH)
Opal4.DA.10SiO2 · nH2O
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Dolomite5.AB.10CaMg(CO3)2
Magnesite5.AB.05MgCO3
Stichtite5.DA.50Mg6Cr3+2(OH)16[CO3] · 4H2O
Group 8 - Phosphates, Arsenates and Vanadates
Monazite-(Ce)8.AD.50Ce(PO4)
Monazite-(La)8.AD.50La(PO4)
Group 9 - Silicates
Chrysotile9.ED.15Mg3(Si2O5)(OH)4
Clinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
Kaolinite9.ED.05Al2(Si2O5)(OH)4
Lizardite9.ED.15Mg3(Si2O5)(OH)4
Nontronite9.EC.40Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Talc9.EC.05Mg3Si4O10(OH)2
Volkonskoite9.EC.40Ca0.3(Cr,Mg,Fe)2((Si,Al)4O10)(OH)2 · 4H2O
Unclassified Minerals, Rocks, etc.
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Unnamed (Pb-Sb Alloy)'-Pb-Sb

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Platinum Group Metals and Alloys
Osmium1.2.2.1(Os,Ir,Ru)
Semi-metals and non-metals
Antimony1.3.1.2Sb
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 9:8
Pentlandite2.7.1.1(FexNiy)Σ9S8
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
AmBnXp, with (m+n):p = 2:3
Bismuthinite2.11.2.3Bi2S3
AmBnXp, with (m+n):p = 1:2
Erlichmanite2.12.1.16OsS2
Hollingworthite2.12.3.8(Rh,Pt,Pd)AsS
Irarsite2.12.3.7(Ir,Ru,Rh,Pt)AsS
Laurite2.12.1.10RuS2
Ruarsite2.12.4.4(Ru,Os)AsS
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Group 7 - MULTIPLE OXIDES
AB2X4
Chromite7.2.3.3Fe2+Cr3+2O4
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Magnesite14.1.1.2MgCO3
AB(XO3)2
Dolomite14.2.1.1CaMg(CO3)2
Group 16b - HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
Stichtite16b.6.2.2Mg6Cr3+2(OH)16[CO3] · 4H2O
Group 38 - ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
AXO4
Monazite-(Ce)38.4.3.1Ce(PO4)
Monazite-(La)38.4.3.2La(PO4)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 1:1 layers
Chrysotile71.1.5.1Mg3(Si2O5)(OH)4
Lizardite71.1.2b.2Mg3(Si2O5)(OH)4
Sheets of 6-membered rings with 2:1 layers
Talc71.2.1.3Mg3Si4O10(OH)2
Sheets of 6-membered rings with 2:1 clays
Nontronite71.3.1a.3Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Volkonskoite71.3.1a.4Ca0.3(Cr,Mg,Fe)2((Si,Al)4O10)(OH)2 · 4H2O
Sheets of 6-membered rings interlayered 1:1, 2:1, and octahedra
Clinochlore71.4.1.4Mg5Al(AlSi3O10)(OH)8
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Si Tetrahedral Frameworks - SiO2 with H2O and organics
Opal75.2.1.1SiO2 · nH2O
Unclassified Minerals, Mixtures, etc.
'Apatite'-Ca5(PO4)3(Cl/F/OH)
Kaolinite-Al2(Si2O5)(OH)4
'Unnamed (Pb-Sb Alloy)'-Pb-Sb

List of minerals for each chemical element

HHydrogen
H StichtiteMg6Cr23+(OH)16[CO3] · 4H2O
H ApatiteCa5(PO4)3(Cl/F/OH)
H ClinochloreMg5Al(AlSi3O10)(OH)8
H ChrysotileMg3(Si2O5)(OH)4
H LizarditeMg3(Si2O5)(OH)4
H TalcMg3Si4O10(OH)2
H OpalSiO2 · nH2O
H VolkonskoiteCa0.3(Cr,Mg,Fe)2((Si,Al)4O10)(OH)2 · 4H2O
H NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
H KaoliniteAl2(Si2O5)(OH)4
H Goethiteα-Fe3+O(OH)
CCarbon
C StichtiteMg6Cr23+(OH)16[CO3] · 4H2O
C MagnesiteMgCO3
C DolomiteCaMg(CO3)2
OOxygen
O ChromiteFe2+Cr23+O4
O StichtiteMg6Cr23+(OH)16[CO3] · 4H2O
O Monazite-(La)La(PO4)
O Monazite-(Ce)Ce(PO4)
O ApatiteCa5(PO4)3(Cl/F/OH)
O ClinochloreMg5Al(AlSi3O10)(OH)8
O ChrysotileMg3(Si2O5)(OH)4
O LizarditeMg3(Si2O5)(OH)4
O MagnesiteMgCO3
O TalcMg3Si4O10(OH)2
O DolomiteCaMg(CO3)2
O OpalSiO2 · nH2O
O QuartzSiO2
O VolkonskoiteCa0.3(Cr,Mg,Fe)2((Si,Al)4O10)(OH)2 · 4H2O
O NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
O KaoliniteAl2(Si2O5)(OH)4
O Goethiteα-Fe3+O(OH)
FFluorine
F ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Na NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
MgMagnesium
Mg StichtiteMg6Cr23+(OH)16[CO3] · 4H2O
Mg ClinochloreMg5Al(AlSi3O10)(OH)8
Mg ChrysotileMg3(Si2O5)(OH)4
Mg LizarditeMg3(Si2O5)(OH)4
Mg MagnesiteMgCO3
Mg TalcMg3Si4O10(OH)2
Mg DolomiteCaMg(CO3)2
Mg VolkonskoiteCa0.3(Cr,Mg,Fe)2((Si,Al)4O10)(OH)2 · 4H2O
AlAluminium
Al ClinochloreMg5Al(AlSi3O10)(OH)8
Al VolkonskoiteCa0.3(Cr,Mg,Fe)2((Si,Al)4O10)(OH)2 · 4H2O
Al NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Al KaoliniteAl2(Si2O5)(OH)4
SiSilicon
Si ClinochloreMg5Al(AlSi3O10)(OH)8
Si ChrysotileMg3(Si2O5)(OH)4
Si LizarditeMg3(Si2O5)(OH)4
Si TalcMg3Si4O10(OH)2
Si OpalSiO2 · nH2O
Si QuartzSiO2
Si VolkonskoiteCa0.3(Cr,Mg,Fe)2((Si,Al)4O10)(OH)2 · 4H2O
Si NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Si KaoliniteAl2(Si2O5)(OH)4
PPhosphorus
P Monazite-(La)La(PO4)
P Monazite-(Ce)Ce(PO4)
P ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
S LauriteRuS2
S ErlichmaniteOsS2
S Irarsite(Ir,Ru,Rh,Pt)AsS
S Ruarsite(Ru,Os)AsS
S Hollingworthite(Rh,Pt,Pd)AsS
S GalenaPbS
S BismuthiniteBi2S3
S Pentlandite(FexNiy)Σ9S8
ClChlorine
Cl ApatiteCa5(PO4)3(Cl/F/OH)
CaCalcium
Ca ApatiteCa5(PO4)3(Cl/F/OH)
Ca DolomiteCaMg(CO3)2
Ca VolkonskoiteCa0.3(Cr,Mg,Fe)2((Si,Al)4O10)(OH)2 · 4H2O
CrChromium
Cr ChromiteFe2+Cr23+O4
Cr StichtiteMg6Cr23+(OH)16[CO3] · 4H2O
Cr VolkonskoiteCa0.3(Cr,Mg,Fe)2((Si,Al)4O10)(OH)2 · 4H2O
FeIron
Fe ChromiteFe2+Cr23+O4
Fe NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Fe Goethiteα-Fe3+O(OH)
Fe Pentlandite(FexNiy)Σ9S8
NiNickel
Ni Pentlandite(FexNiy)Σ9S8
AsArsenic
As Irarsite(Ir,Ru,Rh,Pt)AsS
As Ruarsite(Ru,Os)AsS
As Hollingworthite(Rh,Pt,Pd)AsS
RuRuthenium
Ru LauriteRuS2
Ru Irarsite(Ir,Ru,Rh,Pt)AsS
Ru Ruarsite(Ru,Os)AsS
RhRhodium
Rh Irarsite(Ir,Ru,Rh,Pt)AsS
Rh Hollingworthite(Rh,Pt,Pd)AsS
SbAntimony
Sb AntimonySb
Sb Unnamed (Pb-Sb Alloy)Pb-Sb
LaLanthanum
La Monazite-(La)La(PO4)
CeCerium
Ce Monazite-(Ce)Ce(PO4)
OsOsmium
Os ErlichmaniteOsS2
Os Ruarsite(Ru,Os)AsS
Os Osmium(Os,Ir,Ru)
IrIridium
Ir Irarsite(Ir,Ru,Rh,Pt)AsS
PtPlatinum
Pt Irarsite(Ir,Ru,Rh,Pt)AsS
PbLead
Pb GalenaPbS
Pb Unnamed (Pb-Sb Alloy)Pb-Sb
BiBismuth
Bi BismuthiniteBi2S3

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Sauer, J.R. (1982) Brazil, Paradise of Gemstones. Gemological Institute of America, 135 pp. (pp. 22, 24).
Zaccarini, F., Garuti, G., and Martin, R.F. (2006) Exotic accessory minerals in layered chromitites of the Campo Formoso complex (Brazil). Geologica Acta, 4, 461-469. [http://www.geologica-acta.com/pdf/vol0404a04.pdf]
33rd International Geological Congress (2008) session MPM-04 Platinum-group mineralogy: Diversity of Platinum group minerals (PGM) in chromitites from Brazil, preliminary results.


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