Geology, geochemistry and petrology of basalts from Paraná Continental Magmatic Province in the Araguari, Uberlândia, Uberaba and Sacramento regions, Minas Gerais state, Brazil
Abstract: This study covers the region between the cities of Sacramento and Araguari/Uberlândia (Minas Gerais State, Brazil), where basalt flows from the Paraná Continental Magmatic Province outcrop. The investigated rocks present tholeiitic signature, with high titanium content, and are classified...
Main Authors: | , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Sociedade Brasileira de Geologia
2018-02-01
|
Series: | Brazilian Journal of Geology |
Subjects: | |
Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892018005001102&lng=en&tlng=en |
id |
doaj-9efefcb7b9cb4080976340a16eff82ce |
---|---|
record_format |
Article |
spelling |
doaj-9efefcb7b9cb4080976340a16eff82ce2020-11-24T21:36:13ZengSociedade Brasileira de GeologiaBrazilian Journal of Geology2317-46922018-02-01010.1590/2317-4889201820170091S2317-48892018005001102Geology, geochemistry and petrology of basalts from Paraná Continental Magmatic Province in the Araguari, Uberlândia, Uberaba and Sacramento regions, Minas Gerais state, BrazilLucia Castanheira de MoraesHildor José SeerLeila Soares MarquesAbstract: This study covers the region between the cities of Sacramento and Araguari/Uberlândia (Minas Gerais State, Brazil), where basalt flows from the Paraná Continental Magmatic Province outcrop. The investigated rocks present tholeiitic signature, with high titanium content, and are classified as Pitanga magma-type. The preserved basalt thickness is between 10 and 200 meters and individual flows do not exceed 15 meters thick. Flows were identified as sheet lobes, smaller and thinner flows units - stacked laterally and vertically forming compound lavas -, or frontal, centimetric lobes. The basalt flows show decimetric to metric intercalations of clastic sedimentary rock, with depositional characteristics that can vary from aeolian to lacustrine, and are important markers on prevailing environmental conditions. The plagioclases are dominantly labradorite and pyroxene is augite, whereas olivine can be hyalosiderite or hortonolite/ferrohortonolite. The behavior of the major, minor and trace elements is compatible with the presence of at least two parental magmas, which were subjected to fractional crystallization mainly of plagioclase, clinopyroxene, ilmenite and magnetite. There is a chemistry distinction between basalts from Sacramento to those from Araguari/Uberlândia region, the former one showing more evolved than the last one. The high (La/Lu)N values are indicative of partial melting of a garnet peridotite, while the Rare Earth Elements (REE) values are indicative of fractional crystallization.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892018005001102&lng=en&tlng=enParaná-Etendeka ProvinceLithostratigraphyPetrographyLithochemistryMineral chemistry |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Lucia Castanheira de Moraes Hildor José Seer Leila Soares Marques |
spellingShingle |
Lucia Castanheira de Moraes Hildor José Seer Leila Soares Marques Geology, geochemistry and petrology of basalts from Paraná Continental Magmatic Province in the Araguari, Uberlândia, Uberaba and Sacramento regions, Minas Gerais state, Brazil Brazilian Journal of Geology Paraná-Etendeka Province Lithostratigraphy Petrography Lithochemistry Mineral chemistry |
author_facet |
Lucia Castanheira de Moraes Hildor José Seer Leila Soares Marques |
author_sort |
Lucia Castanheira de Moraes |
title |
Geology, geochemistry and petrology of basalts from Paraná Continental Magmatic Province in the Araguari, Uberlândia, Uberaba and Sacramento regions, Minas Gerais state, Brazil |
title_short |
Geology, geochemistry and petrology of basalts from Paraná Continental Magmatic Province in the Araguari, Uberlândia, Uberaba and Sacramento regions, Minas Gerais state, Brazil |
title_full |
Geology, geochemistry and petrology of basalts from Paraná Continental Magmatic Province in the Araguari, Uberlândia, Uberaba and Sacramento regions, Minas Gerais state, Brazil |
title_fullStr |
Geology, geochemistry and petrology of basalts from Paraná Continental Magmatic Province in the Araguari, Uberlândia, Uberaba and Sacramento regions, Minas Gerais state, Brazil |
title_full_unstemmed |
Geology, geochemistry and petrology of basalts from Paraná Continental Magmatic Province in the Araguari, Uberlândia, Uberaba and Sacramento regions, Minas Gerais state, Brazil |
title_sort |
geology, geochemistry and petrology of basalts from paraná continental magmatic province in the araguari, uberlândia, uberaba and sacramento regions, minas gerais state, brazil |
publisher |
Sociedade Brasileira de Geologia |
series |
Brazilian Journal of Geology |
issn |
2317-4692 |
publishDate |
2018-02-01 |
description |
Abstract: This study covers the region between the cities of Sacramento and Araguari/Uberlândia (Minas Gerais State, Brazil), where basalt flows from the Paraná Continental Magmatic Province outcrop. The investigated rocks present tholeiitic signature, with high titanium content, and are classified as Pitanga magma-type. The preserved basalt thickness is between 10 and 200 meters and individual flows do not exceed 15 meters thick. Flows were identified as sheet lobes, smaller and thinner flows units - stacked laterally and vertically forming compound lavas -, or frontal, centimetric lobes. The basalt flows show decimetric to metric intercalations of clastic sedimentary rock, with depositional characteristics that can vary from aeolian to lacustrine, and are important markers on prevailing environmental conditions. The plagioclases are dominantly labradorite and pyroxene is augite, whereas olivine can be hyalosiderite or hortonolite/ferrohortonolite. The behavior of the major, minor and trace elements is compatible with the presence of at least two parental magmas, which were subjected to fractional crystallization mainly of plagioclase, clinopyroxene, ilmenite and magnetite. There is a chemistry distinction between basalts from Sacramento to those from Araguari/Uberlândia region, the former one showing more evolved than the last one. The high (La/Lu)N values are indicative of partial melting of a garnet peridotite, while the Rare Earth Elements (REE) values are indicative of fractional crystallization. |
topic |
Paraná-Etendeka Province Lithostratigraphy Petrography Lithochemistry Mineral chemistry |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892018005001102&lng=en&tlng=en |
work_keys_str_mv |
AT luciacastanheirademoraes geologygeochemistryandpetrologyofbasaltsfromparanacontinentalmagmaticprovinceinthearaguariuberlandiauberabaandsacramentoregionsminasgeraisstatebrazil AT hildorjoseseer geologygeochemistryandpetrologyofbasaltsfromparanacontinentalmagmaticprovinceinthearaguariuberlandiauberabaandsacramentoregionsminasgeraisstatebrazil AT leilasoaresmarques geologygeochemistryandpetrologyofbasaltsfromparanacontinentalmagmaticprovinceinthearaguariuberlandiauberabaandsacramentoregionsminasgeraisstatebrazil |
_version_ |
1725942447793504256 |