Artigo

Geology and petrology of the Salto do Céu Suite: tectonic and stratigraphic implications on the SW Amazonian Craton

The basic rocks of the Salto do Céu Suite outcrop as sills and flows in the southwestern Amazon Craton, Rondonian-San Ignacio Province, with an age of about 1.44 Ga. Sills are 2 to 30 m thick being hosted by pelites of the Aguapei Group. The flows are up to 5 m thick and cover this unit. Typical tex...

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Autor principal: MACAMBIRA, Moacir José Buenano
Outros Autores: SOUSA, Maria Zélia Aguiar de, RUIZ, Amarildo Salina, BATATA, Maria Elisa Fróes, PIEROSAN, Ronaldo
Grau: Artigo
Idioma: eng
Publicado em: Sociedade Brasileira de Geologia 2019
Assuntos:
Mafic flows and sills
Petrogenesis
Extensional tectonics
Amazonian Craton
Acesso em linha: http://repositorio.ufpa.br/jspui/handle/2011/11227
http://dx.doi.org/10.1590/2317-4889201820160088 
id ir-2011-11227
recordtype dspace
spelling ir-2011-112272019-09-30T13:55:53Z Geology and petrology of the Salto do Céu Suite: tectonic and stratigraphic implications on the SW Amazonian Craton MACAMBIRA, Moacir José Buenano SOUSA, Maria Zélia Aguiar de RUIZ, Amarildo Salina BATATA, Maria Elisa Fróes PIEROSAN, Ronaldo Mafic flows and sills Petrogenesis Extensional tectonics Amazonian Craton The basic rocks of the Salto do Céu Suite outcrop as sills and flows in the southwestern Amazon Craton, Rondonian-San Ignacio Province, with an age of about 1.44 Ga. Sills are 2 to 30 m thick being hosted by pelites of the Aguapei Group. The flows are up to 5 m thick and cover this unit. Typical textures of magma mingling are observed near the contact with granites of Rio Branco Suite. The Rio Branco Intrusive Suite is composed of basic and acid rocks, as well as hybrid rocks that indicate mixing processes between basic and acids magmas. U-Pb (TIMS zircon) results indicate ages around 1.4 Ga for both terms. The Salto do Céu Suite rocks have tholeiites affinity classified as subalkaline and iron-rich tholeiitic basalts, with mg# values between 0.30 and 0.51. They can be separated into two groups, based on La N ; one is richer in ETR with La N greater than 100, while the other one has La N less than 100. Rocks of the Salto do Céu Suite and Rio Branco Suite are interpreted as a bimodal suites showing magma mingling features such as those developed in continental intraplate settings, extensional regime associated to the Columbia/Nuna breakup. PETROBRAS LIMA, G. A; MACAMBIRA, M. J. B. Universidade Federal do Pará 2019-05-29T19:08:44Z 2019-05-29T19:08:44Z 2018-09 Artigo de Periódico MACAMBIRA, Moacir José Buenano et al. Geology and petrology of the Salto do Céu Suite: tectonic and stratigraphic implications on the SW Amazonian Craton. Brazilian Journal of Geology, São Paulo, v. 48, n. 3, p. 603- 622, jul./set. 2018. DOI: http://dx.doi.org/10.1590/2317-4889201820160088. Disponível em: http://repositorio.ufpa.br/jspui/handle/2011/11227. Acesso em:. 2317-4692 http://repositorio.ufpa.br/jspui/handle/2011/11227 http://dx.doi.org/10.1590/2317-4889201820160088  eng Brazilian Journal of Geology Acesso Aberto application/pdf Sociedade Brasileira de Geologia Brasil SBG http://ref.scielo.org/835pzb
institution Repositório Institucional - Universidade Federal do Pará
collection RI-UFPA
language eng
topic Mafic flows and sills
Petrogenesis
Extensional tectonics
Amazonian Craton
spellingShingle Mafic flows and sills
Petrogenesis
Extensional tectonics
Amazonian Craton
MACAMBIRA, Moacir José Buenano
Geology and petrology of the Salto do Céu Suite: tectonic and stratigraphic implications on the SW Amazonian Craton
topic_facet Mafic flows and sills
Petrogenesis
Extensional tectonics
Amazonian Craton
description The basic rocks of the Salto do Céu Suite outcrop as sills and flows in the southwestern Amazon Craton, Rondonian-San Ignacio Province, with an age of about 1.44 Ga. Sills are 2 to 30 m thick being hosted by pelites of the Aguapei Group. The flows are up to 5 m thick and cover this unit. Typical textures of magma mingling are observed near the contact with granites of Rio Branco Suite. The Rio Branco Intrusive Suite is composed of basic and acid rocks, as well as hybrid rocks that indicate mixing processes between basic and acids magmas. U-Pb (TIMS zircon) results indicate ages around 1.4 Ga for both terms. The Salto do Céu Suite rocks have tholeiites affinity classified as subalkaline and iron-rich tholeiitic basalts, with mg# values between 0.30 and 0.51. They can be separated into two groups, based on La N ; one is richer in ETR with La N greater than 100, while the other one has La N less than 100. Rocks of the Salto do Céu Suite and Rio Branco Suite are interpreted as a bimodal suites showing magma mingling features such as those developed in continental intraplate settings, extensional regime associated to the Columbia/Nuna breakup.
format Artigo
author MACAMBIRA, Moacir José Buenano
author2 SOUSA, Maria Zélia Aguiar de
RUIZ, Amarildo Salina
BATATA, Maria Elisa Fróes
PIEROSAN, Ronaldo
author2Str SOUSA, Maria Zélia Aguiar de
RUIZ, Amarildo Salina
BATATA, Maria Elisa Fróes
PIEROSAN, Ronaldo
title Geology and petrology of the Salto do Céu Suite: tectonic and stratigraphic implications on the SW Amazonian Craton
title_short Geology and petrology of the Salto do Céu Suite: tectonic and stratigraphic implications on the SW Amazonian Craton
title_full Geology and petrology of the Salto do Céu Suite: tectonic and stratigraphic implications on the SW Amazonian Craton
title_fullStr Geology and petrology of the Salto do Céu Suite: tectonic and stratigraphic implications on the SW Amazonian Craton
title_full_unstemmed Geology and petrology of the Salto do Céu Suite: tectonic and stratigraphic implications on the SW Amazonian Craton
title_sort geology and petrology of the salto do céu suite: tectonic and stratigraphic implications on the sw amazonian craton
publisher Sociedade Brasileira de Geologia
publishDate 2019
url http://repositorio.ufpa.br/jspui/handle/2011/11227
http://dx.doi.org/10.1590/2317-4889201820160088 
_version_ 1832603618476294144
score 11.755432

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