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Transminas dike swarm, Brazil i
Regional Level Types
Transminas dike swarm Dike swarm
Brazil Country

Regional Level Types
Transminas dike swarm	Dike swarm
Brazil	Country

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Type:

Dike swarm

Mindat Locality ID:

474708

Long-form identifier:

mindat:1:2:474708:9

GUID (UUID V4):

The Transminas dikes stand out as two major giant dike swarms: (1) The Azimuth 125° swarm is a series of magnetic anomalies (1100 km-long) stretching from the southern region of Minas Gerais State to the western part of Goiás State in the central-western region of Brazil, following the Alto Paranaíba Lineament; (2) The Azimuth 170° extends from southeastern Minas Gerais State to central-southern Bahia State (800 km-long). The Transminas dikes derive their name from their extensive crosscutting of the state of Minas Gerais in southeastern Brazil, as evidenced by magnetometric survey. 40Ar/39Ar ages of some of these dikes in central Minas Gerais are Cretaceous. The dikes intrude Precambrian basement rocks belonging to the Mantiqueira and Tocantins provinces, as well as the São Francisco Craton.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

12 valid minerals.

Rock Types Recorded

Select Rock List Type

Alphabetical List Tree Diagram

ⓘ 'Microgabbro'

Detailed Mineral List:

ⓘ 'Alkali Feldspar'

References:

Macêdo Filho, Antomat A.; Janasi, Valdecir A.; Oliveira, Alisson L.; Hollanda, Maria Helena; Szymanowski, Dawid; Dantas, Elton L.; Ernst, Richard E.; Chaves, Alexandre O. (2026) The Transminas and Pirenópolis dike swarms: New evidence for the central and South Atlantic Magmatic Provinces in South America. Geoscience Frontiers, 17 (4). doi:10.1016/j.gsf.2026.102306

ⓘ 'Apatite'

Formula: Ca₅(PO₄)₃(Cl/F/OH)

References:

ⓘ Augite

Formula: (Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆

References:

ⓘ Augite var. Ferroaugite

Formula: (Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆

References:

ⓘ Baddeleyite

Formula: ZrO₂

References:

ⓘ Chalcocite

Formula: Cu₂S

References:

ⓘ Chalcopyrite

Formula: CuFeS₂

References:

ⓘ 'Chlorite Group'

References:

ⓘ 'Clinopyroxene Subgroup'

References:

ⓘ Diopside

Formula: CaMgSi₂O₆

References:

ⓘ Forsterite

Formula: Mg₂(SiO₄)

References:

ⓘ 'Iddingsite'

References:

ⓘ Ilmenite

Formula: Fe²⁺TiO₃

References:

ⓘ Magnetite

Formula: Fe²⁺Fe³⁺₂O₄

References:

ⓘ Magnetite var. Titanium-bearing Magnetite

Formula: Fe²⁺(Fe³⁺,Ti)₂O₄

References:

ⓘ 'Olivine Group'

Formula: M₂SiO₄

References:

ⓘ 'Plagioclase'

Formula: (Na,Ca)[(Si,Al)AlSi₂]O₈

References:

ⓘ Pyrite

Formula: FeS₂

References:

ⓘ 'Pyroxene Group'

Formula: ADSi₂O₆

References:

ⓘ Quartz

Formula: SiO₂

References:

ⓘ 'Serpentine Subgroup'

Formula: D₃[Si₂O₅](OH)₄

References:

ⓘ Zircon

Formula: Zr(SiO₄)

References:

ⓘ Zirconolite

Formula: CaZrTi₂O₇

References:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘ	Chalcocite	2.BA.05	Cu₂S
ⓘ	Chalcopyrite	2.CB.10a	CuFeS₂
ⓘ	Pyrite	2.EB.05a	FeS₂
Group 4 - Oxides and Hydroxides
ⓘ	Magnetite	4.BB.05	Fe²⁺Fe³⁺₂O₄
ⓘ	var. Titanium-bearing Magnetite	4.BB.05	Fe²⁺(Fe³⁺,Ti)₂O₄
ⓘ	Ilmenite	4.CB.05	Fe²⁺TiO₃
ⓘ	Quartz	4.DA.05	SiO₂
ⓘ	Baddeleyite	4.DE.35	ZrO₂
ⓘ	Zirconolite	4.DH.30	CaZrTi₂O₇
Group 9 - Silicates
ⓘ	Forsterite	9.AC.05	Mg₂(SiO₄)
ⓘ	Zircon	9.AD.30	Zr(SiO₄)
ⓘ	Augite	9.DA.15	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
ⓘ	Diopside	9.DA.15	CaMgSi₂O₆
ⓘ	Augite var. Ferroaugite	9.DA.15	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Unclassified
ⓘ	'Alkali Feldspar'	-
ⓘ	'Chlorite Group'	-
ⓘ	'Iddingsite'	-
ⓘ	'Clinopyroxene Subgroup'	-
ⓘ	'Plagioclase'	-	(Na,Ca)[(Si,Al)AlSi₂]O₈
ⓘ	'Pyroxene Group'	-	ADSi₂O₆
ⓘ	'Serpentine Subgroup'	-	D₃[Si₂O₅](OH)₄
ⓘ	'Apatite'	-	Ca₅(PO₄)₃(Cl/F/OH)
ⓘ	'Olivine Group'	-	M₂SiO₄

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Serpentine Subgroup	D₃[Si₂O₅](OH)₄
H	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
O	Oxygen
O	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
O	ⓘ Baddeleyite	ZrO₂
O	ⓘ Diopside	CaMgSi₂O₆
O	ⓘ Forsterite	Mg₂(SiO₄)
O	ⓘ Ilmenite	Fe²⁺TiO₃
O	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
O	ⓘ Quartz	SiO₂
O	ⓘ Magnetite var. Titanium-bearing Magnetite	Fe²⁺(Fe³⁺,Ti)₂O₄
O	ⓘ Zircon	Zr(SiO₄)
O	ⓘ Zirconolite	CaZrTi₂O₇
O	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
O	ⓘ Pyroxene Group	ADSi₂O₆
O	ⓘ Serpentine Subgroup	D₃[Si₂O₅](OH)₄
O	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
O	ⓘ Olivine Group	M₂SiO₄
O	ⓘ Augite var. Ferroaugite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
F	Fluorine
F	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
Na	Sodium
Na	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Mg	Magnesium
Mg	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Mg	ⓘ Diopside	CaMgSi₂O₆
Mg	ⓘ Forsterite	Mg₂(SiO₄)
Mg	ⓘ Augite var. Ferroaugite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Al	Aluminium
Al	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Si	Silicon
Si	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Si	ⓘ Diopside	CaMgSi₂O₆
Si	ⓘ Forsterite	Mg₂(SiO₄)
Si	ⓘ Quartz	SiO₂
Si	ⓘ Zircon	Zr(SiO₄)
Si	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Si	ⓘ Pyroxene Group	ADSi₂O₆
Si	ⓘ Serpentine Subgroup	D₃[Si₂O₅](OH)₄
Si	ⓘ Olivine Group	M₂SiO₄
Si	ⓘ Augite var. Ferroaugite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
P	Phosphorus
P	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
S	Sulfur
S	ⓘ Chalcopyrite	CuFeS₂
S	ⓘ Chalcocite	Cu₂S
S	ⓘ Pyrite	FeS₂
Cl	Chlorine
Cl	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
Ca	Calcium
Ca	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Ca	ⓘ Diopside	CaMgSi₂O₆
Ca	ⓘ Zirconolite	CaZrTi₂O₇
Ca	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Ca	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
Ca	ⓘ Augite var. Ferroaugite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Ti	Titanium
Ti	ⓘ Ilmenite	Fe²⁺TiO₃
Ti	ⓘ Magnetite var. Titanium-bearing Magnetite	Fe²⁺(Fe³⁺,Ti)₂O₄
Ti	ⓘ Zirconolite	CaZrTi₂O₇
Fe	Iron
Fe	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Fe	ⓘ Chalcopyrite	CuFeS₂
Fe	ⓘ Ilmenite	Fe²⁺TiO₃
Fe	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
Fe	ⓘ Pyrite	FeS₂
Fe	ⓘ Magnetite var. Titanium-bearing Magnetite	Fe²⁺(Fe³⁺,Ti)₂O₄
Fe	ⓘ Augite var. Ferroaugite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Cu	Copper
Cu	ⓘ Chalcopyrite	CuFeS₂
Cu	ⓘ Chalcocite	Cu₂S
Zr	Zirconium
Zr	ⓘ Baddeleyite	ZrO₂
Zr	ⓘ Zircon	Zr(SiO₄)
Zr	ⓘ Zirconolite	CaZrTi₂O₇

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

[1]Macêdo Filho, Antomat A.; Janasi, Valdecir A.; Oliveira, Alisson L.; Hollanda, Maria Helena; Szymanowski, Dawid; Dantas, Elton L.; Ernst, Richard E.; Chaves, Alexandre O. (2026) The Transminas and Pirenópolis dike swarms: New evidence for the central and South Atlantic Magmatic Provinces in South America. Geoscience Frontiers, 17 (4). doi:10.1016/j.gsf.2026.102306

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Select Mineral List Type

Mineral List

Rock Types Recorded

Select Rock List Type

Detailed Mineral List:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

List of minerals for each chemical element

References

Transminas dike swarm, Brazil i
Regional Level Types
Transminas dike swarm Dike swarm
Brazil Country