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O'Toole deposit, Fortaleza de Minas, Minas Gerais, Brazil i
Regional Level Types
O'Toole deposit Deposit
Fortaleza de Minas Municipality
Minas Gerais State
Brazil Country

Regional Level Types
O'Toole deposit	Deposit
Fortaleza de Minas	Municipality
Minas Gerais	State
Brazil	Country

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Open pit

O'Toole deposit, Fortaleza de Minas, Minas Gerais, Brazil

Hematite

O'Toole deposit, Fortaleza de Minas, Minas Gerais, Brazil

Open pit

O'Toole deposit, Fortaleza de Minas, Minas Gerais, Brazil

Hematite

O'Toole deposit, Fortaleza de Minas, Minas Gerais, Brazil

Open pit

O'Toole deposit, Fortaleza de Minas, Minas Gerais, Brazil

Hematite

O'Toole deposit, Fortaleza de Minas, Minas Gerais, Brazil

Latitude & Longitude (WGS84):

20° 53' 55'' South , 46° 42' 45'' West

Latitude & Longitude (decimal):

G#: 6uqc158bq

Type:

Köppen climate type:

Cwa : Monsoon-influenced humid subtropical climate

Nearest Settlements:

Place	Population	Distance
Itaú de Minas	14,888 (2012)	18.2km
Passos	98,752 (2012)	22.7km
São Sebastião do Paraíso	68,654 (2013)	29.0km
Alpinópolis	13,286 (2012)	33.9km
Cássia	14,391 (2012)	41.3km

Mindat Locality ID:

159621

Long-form identifier:

mindat:1:2:159621:5

GUID (UUID V4):

8c15b819-62b3-45dd-a342-9ffc418ad2ec

A suspended Ni mine, 6 km SW of Fortaleza de Minas.

This Ni-Cu-PGE sulfide deposit is hosted by Archean komatiitic rocks of the Morro do Ferro greenstone belt.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

33 valid minerals.

Detailed Mineral List:

ⓘ Actinolite

Formula: ◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂

References:

Brenner, T.L., Teixeira, N.A., Oliveira, J.A.L., Franke, N.D., Thompson, J.F.H. (1990) The O'Toole nickel deposit, Morro do Ferro greenstone belt, Brazil. Economic Geology: 85: 904-920.

ⓘ Arsenopyrite

Formula: FeAsS

References:

Marchetto (1990) Econ Geol 85:921-927

ⓘ Bismuth

Formula: Bi

References:

Marchetto (1990) Econ Geol 85:921-927

ⓘ Chalcopyrite

Formula: CuFeS₂

References:

Brenner, T.L., Teixeira, N.A., Oliveira, J.A.L., Franke, N.D., Thompson, J.F.H. (1990) The O'Toole nickel deposit, Morro do Ferro greenstone belt, Brazil. Economic Geology: 85: 904-920.

ⓘ 'Chlorite Group'

References:

Brenner, T.L., Teixeira, N.A., Oliveira, J.A.L., Franke, N.D., Thompson, J.F.H. (1990) The O'Toole nickel deposit, Morro do Ferro greenstone belt, Brazil. Economic Geology: 85: 904-920.

ⓘ Cobaltite

Formula: CoAsS

References:

Brenner, T.L., Teixeira, N.A., Oliveira, J.A.L., Franke, N.D., Thompson, J.F.H. (1990) The O'Toole nickel deposit, Morro do Ferro greenstone belt, Brazil. Economic Geology: 85: 904-920.

ⓘ Gersdorffite

Formula: NiAsS

References:

Brenner, T.L., Teixeira, N.A., Oliveira, J.A.L., Franke, N.D., Thompson, J.F.H. (1990) The O'Toole nickel deposit, Morro do Ferro greenstone belt, Brazil. Economic Geology: 85: 904-920.

ⓘ Gold

Formula: Au

References:

Brenner, T.L., Teixeira, N.A., Oliveira, J.A.L., Franke, N.D., Thompson, J.F.H. (1990) The O'Toole nickel deposit, Morro do Ferro greenstone belt, Brazil. Economic Geology: 85: 904-920.

ⓘ Graphite

Formula: C

References:

Brenner, T.L., Teixeira, N.A., Oliveira, J.A.L., Franke, N.D., Thompson, J.F.H. (1990) The O'Toole nickel deposit, Morro do Ferro greenstone belt, Brazil. Economic Geology: 85: 904-920.

ⓘ Hematite

Formula: Fe₂O₃

References:

Brenner, T.L., Teixeira, N.A., Oliveira, J.A.L., Franke, N.D., Thompson, J.F.H. (1990) The O'Toole nickel deposit, Morro do Ferro greenstone belt, Brazil. Economic Geology: 85: 904-920.

ⓘ Ilmenite

Formula: Fe²⁺TiO₃

References:

Brenner, T.L., Teixeira, N.A., Oliveira, J.A.L., Franke, N.D., Thompson, J.F.H. (1990) The O'Toole nickel deposit, Morro do Ferro greenstone belt, Brazil. Economic Geology: 85: 904-920.

ⓘ Irarsite

Formula: (Ir,Ru,Rh,Pt)AsS

References:

Brenner et al (1990) Econ Geol 85:904-920

ⓘ Kotulskite

Formula: Pd(Te,Bi)_2-x (x ≈ 0.4)

References:

Brenner, T.L., Teixeira, N.A., Oliveira, J.A.L., Franke, N.D., Thompson, J.F.H. (1990) The O'Toole nickel deposit, Morro do Ferro greenstone belt, Brazil. Economic Geology: 85: 904-920.

ⓘ Mackinawite

Formula: FeS

References:

Marchetto (1990) Econ Geol 85:921-927

ⓘ Magnetite

Formula: Fe²⁺Fe³⁺₂O₄

References:

Brenner, T.L., Teixeira, N.A., Oliveira, J.A.L., Franke, N.D., Thompson, J.F.H. (1990) The O'Toole nickel deposit, Morro do Ferro greenstone belt, Brazil. Economic Geology: 85: 904-920.

ⓘ Marcasite

Formula: FeS₂

References:

Brenner, T.L., Teixeira, N.A., Oliveira, J.A.L., Franke, N.D., Thompson, J.F.H. (1990) The O'Toole nickel deposit, Morro do Ferro greenstone belt, Brazil. Economic Geology: 85: 904-920.

ⓘ Maucherite

Formula: Ni₁₁As₈

References:

Marchetto (1990) Econ Geol 85:921-927

ⓘ Melonite

Formula: NiTe₂

References:

Brenner, T.L., Teixeira, N.A., Oliveira, J.A.L., Franke, N.D., Thompson, J.F.H. (1990) The O'Toole nickel deposit, Morro do Ferro greenstone belt, Brazil. Economic Geology: 85: 904-920.

ⓘ Nickeline

Formula: NiAs

References:

Marchetto (1990) Econ Geol 85:921-927

ⓘ Omeiite

Formula: (Os,Ru)As₂

References:

Marchetto (1990) Econ Geol 85:921-927

ⓘ Osarsite

Formula: (Os,Ru)AsS

References:

Marchetto (1990) Econ Geol 85:921-927

ⓘ Pentlandite

Formula: (Ni_xFe_y)_Σ9S₈

References:

Brenner, T.L., Teixeira, N.A., Oliveira, J.A.L., Franke, N.D., Thompson, J.F.H. (1990) The O'Toole nickel deposit, Morro do Ferro greenstone belt, Brazil. Economic Geology: 85: 904-920.

ⓘ Platinum

Formula: Pt

References:

Marchetto (1990) Econ Geol 85:921-927

ⓘ Pyrite

Formula: FeS₂

References:

Brenner, T.L., Teixeira, N.A., Oliveira, J.A.L., Franke, N.D., Thompson, J.F.H. (1990) The O'Toole nickel deposit, Morro do Ferro greenstone belt, Brazil. Economic Geology: 85: 904-920.

ⓘ Pyrite var. Bravoite

Formula: (Fe,Ni)S₂

References:

Brenner, T.L., Teixeira, N.A., Oliveira, J.A.L., Franke, N.D., Thompson, J.F.H. (1990) The O'Toole nickel deposit, Morro do Ferro greenstone belt, Brazil. Economic Geology: 85: 904-920.

ⓘ Pyrrhotite

Formula: Fe_1-xS

References:

Brenner, T.L., Teixeira, N.A., Oliveira, J.A.L., Franke, N.D., Thompson, J.F.H. (1990) The O'Toole nickel deposit, Morro do Ferro greenstone belt, Brazil. Economic Geology: 85: 904-920.

ⓘ Rheniite

Formula: ReS₂

References:

Marchetto (1990) Econ Geol 85:921-927

ⓘ Silver

Formula: Ag

References:

Marchetto (1990) Econ Geol 85:921-927

ⓘ Sperrylite

Formula: PtAs₂

References:

Brenner, T.L., Teixeira, N.A., Oliveira, J.A.L., Franke, N.D., Thompson, J.F.H. (1990) The O'Toole nickel deposit, Morro do Ferro greenstone belt, Brazil. Economic Geology: 85: 904-920.

ⓘ Sphalerite

Formula: ZnS

References:

Brenner, T.L., Teixeira, N.A., Oliveira, J.A.L., Franke, N.D., Thompson, J.F.H. (1990) The O'Toole nickel deposit, Morro do Ferro greenstone belt, Brazil. Economic Geology: 85: 904-920.

ⓘ Talc

Formula: Mg₃Si₄O₁₀(OH)₂

References:

Brenner, T.L., Teixeira, N.A., Oliveira, J.A.L., Franke, N.D., Thompson, J.F.H. (1990) The O'Toole nickel deposit, Morro do Ferro greenstone belt, Brazil. Economic Geology: 85: 904-920.

ⓘ Titanite

Formula: CaTi(SiO₄)O

References:

Brenner, T.L., Teixeira, N.A., Oliveira, J.A.L., Franke, N.D., Thompson, J.F.H. (1990) The O'Toole nickel deposit, Morro do Ferro greenstone belt, Brazil. Economic Geology: 85: 904-920.

ⓘ Tremolite

Formula: ◻Ca₂Mg₅(Si₈O₂₂)(OH)₂

References:

Brenner, T.L., Teixeira, N.A., Oliveira, J.A.L., Franke, N.D., Thompson, J.F.H. (1990) The O'Toole nickel deposit, Morro do Ferro greenstone belt, Brazil. Economic Geology: 85: 904-920.

ⓘ Valleriite

Formula: (Fe²⁺,Cu)₄(Mg,Al)₃S₄(OH,O)₆

References:

Marchetto (1990) Econ Geol 85:921-927

ⓘ Violarite

Formula: Fe²⁺Ni³⁺₂S₄

References:

Brenner et al (1990) Econ Geol 85:904-920

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Gold	1.AA.05	Au
ⓘ	Silver	1.AA.05	Ag
ⓘ	Platinum	1.AF.10	Pt
ⓘ	Bismuth	1.CA.05	Bi
ⓘ	Graphite	1.CB.05a	C
Group 2 - Sulphides and Sulfosalts
ⓘ	Maucherite	2.AB.15	Ni₁₁As₈
ⓘ	Pentlandite	2.BB.15	(Ni_xFe_y)_Σ9S₈
ⓘ	Sphalerite	2.CB.05a	ZnS
ⓘ	Chalcopyrite	2.CB.10a	CuFeS₂
ⓘ	Nickeline	2.CC.05	NiAs
ⓘ	Kotulskite	2.CC.05	Pd(Te,Bi)_2-x (x ≈ 0.4)
ⓘ	Pyrrhotite	2.CC.10	Fe_1-xS
ⓘ	Mackinawite	2.CC.25	FeS
ⓘ	Violarite	2.DA.05	Fe²⁺Ni³⁺₂S₄
ⓘ	Melonite	2.EA.20	NiTe₂
ⓘ	Pyrite	2.EB.05a	FeS₂
ⓘ	Sperrylite	2.EB.05a	PtAs₂
ⓘ	Pyrite var. Bravoite	2.EB.05a	(Fe,Ni)S₂
ⓘ	Marcasite	2.EB.10a	FeS₂
ⓘ	Omeiite	2.EB.15a	(Os,Ru)As₂
ⓘ	Arsenopyrite	2.EB.20	FeAsS
ⓘ	Osarsite	2.EB.20	(Os,Ru)AsS
ⓘ	Gersdorffite	2.EB.25	NiAsS
ⓘ	Cobaltite	2.EB.25	CoAsS
ⓘ	Irarsite	2.EB.25	(Ir,Ru,Rh,Pt)AsS
ⓘ	Rheniite	2.EB.35	ReS₂
ⓘ	Valleriite	2.FD.30	(Fe²⁺,Cu)₄(Mg,Al)₃S₄(OH,O)₆
Group 4 - Oxides and Hydroxides
ⓘ	Magnetite	4.BB.05	Fe²⁺Fe³⁺₂O₄
ⓘ	Ilmenite	4.CB.05	Fe²⁺TiO₃
ⓘ	Hematite	4.CB.05	Fe₂O₃
Group 9 - Silicates
ⓘ	Titanite	9.AG.15	CaTi(SiO₄)O
ⓘ	Tremolite	9.DE.10	◻Ca₂Mg₅(Si₈O₂₂)(OH)₂
ⓘ	Actinolite	9.DE.10	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
ⓘ	Talc	9.EC.05	Mg₃Si₄O₁₀(OH)₂
Unclassified
ⓘ	'Chlorite Group'	-

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
H	ⓘ Talc	Mg₃Si₄O₁₀(OH)₂
H	ⓘ Tremolite	◻Ca₂Mg₅(Si₈O₂₂)(OH)₂
H	ⓘ Valleriite	(Fe²⁺,Cu)₄(Mg,Al)₃S₄(OH,O)₆
C	Carbon
C	ⓘ Graphite	C
O	Oxygen
O	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
O	ⓘ Hematite	Fe₂O₃
O	ⓘ Ilmenite	Fe²⁺TiO₃
O	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
O	ⓘ Talc	Mg₃Si₄O₁₀(OH)₂
O	ⓘ Titanite	CaTi(SiO₄)O
O	ⓘ Tremolite	◻Ca₂Mg₅(Si₈O₂₂)(OH)₂
O	ⓘ Valleriite	(Fe²⁺,Cu)₄(Mg,Al)₃S₄(OH,O)₆
Mg	Magnesium
Mg	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
Mg	ⓘ Talc	Mg₃Si₄O₁₀(OH)₂
Mg	ⓘ Tremolite	◻Ca₂Mg₅(Si₈O₂₂)(OH)₂
Mg	ⓘ Valleriite	(Fe²⁺,Cu)₄(Mg,Al)₃S₄(OH,O)₆
Al	Aluminium
Al	ⓘ Valleriite	(Fe²⁺,Cu)₄(Mg,Al)₃S₄(OH,O)₆
Si	Silicon
Si	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
Si	ⓘ Talc	Mg₃Si₄O₁₀(OH)₂
Si	ⓘ Titanite	CaTi(SiO₄)O
Si	ⓘ Tremolite	◻Ca₂Mg₅(Si₈O₂₂)(OH)₂
S	Sulfur
S	ⓘ Arsenopyrite	FeAsS
S	ⓘ Pyrite var. Bravoite	(Fe,Ni)S₂
S	ⓘ Chalcopyrite	CuFeS₂
S	ⓘ Cobaltite	CoAsS
S	ⓘ Gersdorffite	NiAsS
S	ⓘ Irarsite	(Ir,Ru,Rh,Pt)AsS
S	ⓘ Mackinawite	FeS
S	ⓘ Marcasite	FeS₂
S	ⓘ Osarsite	(Os,Ru)AsS
S	ⓘ Pentlandite	(Ni_xFe_y)_Σ9S₈
S	ⓘ Pyrite	FeS₂
S	ⓘ Pyrrhotite	Fe_1-xS
S	ⓘ Sphalerite	ZnS
S	ⓘ Valleriite	(Fe²⁺,Cu)₄(Mg,Al)₃S₄(OH,O)₆
S	ⓘ Violarite	Fe²⁺Ni₂³⁺S₄
S	ⓘ Rheniite	ReS₂
Ca	Calcium
Ca	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
Ca	ⓘ Titanite	CaTi(SiO₄)O
Ca	ⓘ Tremolite	◻Ca₂Mg₅(Si₈O₂₂)(OH)₂
Ti	Titanium
Ti	ⓘ Ilmenite	Fe²⁺TiO₃
Ti	ⓘ Titanite	CaTi(SiO₄)O
Fe	Iron
Fe	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
Fe	ⓘ Arsenopyrite	FeAsS
Fe	ⓘ Pyrite var. Bravoite	(Fe,Ni)S₂
Fe	ⓘ Chalcopyrite	CuFeS₂
Fe	ⓘ Hematite	Fe₂O₃
Fe	ⓘ Ilmenite	Fe²⁺TiO₃
Fe	ⓘ Mackinawite	FeS
Fe	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
Fe	ⓘ Marcasite	FeS₂
Fe	ⓘ Pentlandite	(Ni_xFe_y)_Σ9S₈
Fe	ⓘ Pyrite	FeS₂
Fe	ⓘ Pyrrhotite	Fe_1-xS
Fe	ⓘ Valleriite	(Fe²⁺,Cu)₄(Mg,Al)₃S₄(OH,O)₆
Fe	ⓘ Violarite	Fe²⁺Ni₂³⁺S₄
Co	Cobalt
Co	ⓘ Cobaltite	CoAsS
Ni	Nickel
Ni	ⓘ Pyrite var. Bravoite	(Fe,Ni)S₂
Ni	ⓘ Gersdorffite	NiAsS
Ni	ⓘ Maucherite	Ni₁₁As₈
Ni	ⓘ Melonite	NiTe₂
Ni	ⓘ Nickeline	NiAs
Ni	ⓘ Pentlandite	(Ni_xFe_y)_Σ9S₈
Ni	ⓘ Violarite	Fe²⁺Ni₂³⁺S₄
Cu	Copper
Cu	ⓘ Chalcopyrite	CuFeS₂
Cu	ⓘ Valleriite	(Fe²⁺,Cu)₄(Mg,Al)₃S₄(OH,O)₆
Zn	Zinc
Zn	ⓘ Sphalerite	ZnS
As	Arsenic
As	ⓘ Arsenopyrite	FeAsS
As	ⓘ Cobaltite	CoAsS
As	ⓘ Gersdorffite	NiAsS
As	ⓘ Irarsite	(Ir,Ru,Rh,Pt)AsS
As	ⓘ Maucherite	Ni₁₁As₈
As	ⓘ Nickeline	NiAs
As	ⓘ Omeiite	(Os,Ru)As₂
As	ⓘ Osarsite	(Os,Ru)AsS
As	ⓘ Sperrylite	PtAs₂
Ru	Ruthenium
Ru	ⓘ Irarsite	(Ir,Ru,Rh,Pt)AsS
Ru	ⓘ Omeiite	(Os,Ru)As₂
Ru	ⓘ Osarsite	(Os,Ru)AsS
Rh	Rhodium
Rh	ⓘ Irarsite	(Ir,Ru,Rh,Pt)AsS
Pd	Palladium
Pd	ⓘ Kotulskite	Pd(Te,Bi)_2-x (x ≈ 0.4)
Ag	Silver
Ag	ⓘ Silver	Ag
Te	Tellurium
Te	ⓘ Kotulskite	Pd(Te,Bi)_2-x (x ≈ 0.4)
Te	ⓘ Melonite	NiTe₂
Re	Rhenium
Re	ⓘ Rheniite	ReS₂
Os	Osmium
Os	ⓘ Omeiite	(Os,Ru)As₂
Os	ⓘ Osarsite	(Os,Ru)AsS
Ir	Iridium
Ir	ⓘ Irarsite	(Ir,Ru,Rh,Pt)AsS
Pt	Platinum
Pt	ⓘ Irarsite	(Ir,Ru,Rh,Pt)AsS
Pt	ⓘ Platinum	Pt
Pt	ⓘ Sperrylite	PtAs₂
Au	Gold
Au	ⓘ Gold	Au
Bi	Bismuth
Bi	ⓘ Bismuth	Bi
Bi	ⓘ Kotulskite	Pd(Te,Bi)_2-x (x ≈ 0.4)

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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

Taufen, P. M., & Marchetto, C. M. (1989): Tropical weathering control of Ni, Cu, Co, and platinum group element distributions at the O'Toole Ni-Cu sulphide deposit, Minas Gerais, Brazil. Journal of Geochemical Exploration, 32(1-3), 185-197.

Brenner, T. L.; Teixeira, N. A.; Oliveira, J. A. L.; Franke, N. D.; Thompson, J. F. H. (1990): The O'Toole nickel deposit, Morro do Ferro greenstone belt, Brazil. Economic Geology 85, 904-920.

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O'Toole deposit, Fortaleza de Minas, Minas Gerais, BraziliRegional Level TypesO'Toole depositDeposit Fortaleza de MinasMunicipality Minas GeraisState BrazilCountry function showexplain() { $("#locexplain").toggle(); if (typeof movemap === "function") movemap(); }

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Mineral List

Detailed Mineral List:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

List of minerals for each chemical element

Other Regions, Features and Areas containing this locality

References

O'Toole deposit, Fortaleza de Minas, Minas Gerais, Brazil i
Regional Level Types
O'Toole deposit Deposit
Fortaleza de Minas Municipality
Minas Gerais State
Brazil Country