Structural and geochronological constraints on the evolution of the Juréia Massif, Registro Domain, State of São Paulo, Brazil
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| Format: | Artículo científico |
| Language: | en |
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Academia Brasileira de Ciências
2007
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| _version_ | 1876436030752555008 |
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| author | Cláudia R. Passarelli |
| author_facet | Cláudia R. Passarelli |
| contents | Structural and geochronological constraints on the evolution of the Juréia Massif, Registro Domain, State of São Paulo, Brazil Cláudia R. Passarelli Hélcio J. Prazeres Oswaldo Siga Gergely A.J. Szabó Miguel A. S. Basei Joaquim Marco Multidisciplinaria (Ciencias Naturales y Exactas) shear zone gneissic rocks tectonic domain Pb geochronology The Juréia Massif, southeastern São Paulo State (Brazil), is part of the Registro Domain, limited to the north by theCubatão-Itariri Shear System and to the south by the Serrinha Shear Zone. Mostly composed of migmatitic granitegneissrocks, represents a Paleoproterozoic terrane (1.92.2 Ga) strongly deformed during the Neoproterozoic (750580 Ma). The present tectonic scenario was established at the end of the Neoproterozoic, as a result of collagesassociated with the formation of Western Gondwana. The Ponta da Juréia, our study area within the Juréia Massif,is constituted by paragneisses (garnet-muscovite-biotite gneisses). The monazite U-Pb age of 750 Ma is related to amain regional metamorphic event that reached the high amphibolite facies, recorded in rocks from the Itatins Complexand Cachoeira Sequence as well, which also belongs to the Registro Domain. The paragneissic rocks of this study areaffected by the E-W-trending Serrinha Shear Zone, registering a predominantly dextral movement. Biotite K-Ar agesof 482 ± 12 Ma may represent later movements and reflect the younger ages of reactivation of the major lineamentsand juxtaposition of the tectonic blocks involved. 2007 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32779308 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.3 Vol.79 |
| format | Artículo científico |
| id | redalyc_32779308 |
| institution | Redalyc |
| language | en |
| publishDate | 2007 |
| publisher | Academia Brasileira de Ciências |
| spellingShingle | Structural and geochronological constraints on the evolution of the Juréia Massif, Registro Domain, State of São Paulo, Brazil Cláudia R. Passarelli Multidisciplinaria (Ciencias Naturales y Exactas) shear zone gneissic rocks tectonic domain Pb geochronology Structural and geochronological constraints on the evolution of the Juréia Massif, Registro Domain, State of São Paulo, Brazil Cláudia R. Passarelli Hélcio J. Prazeres Oswaldo Siga Gergely A.J. Szabó Miguel A. S. Basei Joaquim Marco Multidisciplinaria (Ciencias Naturales y Exactas) shear zone gneissic rocks tectonic domain Pb geochronology The Juréia Massif, southeastern São Paulo State (Brazil), is part of the Registro Domain, limited to the north by theCubatão-Itariri Shear System and to the south by the Serrinha Shear Zone. Mostly composed of migmatitic granitegneissrocks, represents a Paleoproterozoic terrane (1.92.2 Ga) strongly deformed during the Neoproterozoic (750580 Ma). The present tectonic scenario was established at the end of the Neoproterozoic, as a result of collagesassociated with the formation of Western Gondwana. The Ponta da Juréia, our study area within the Juréia Massif,is constituted by paragneisses (garnet-muscovite-biotite gneisses). The monazite U-Pb age of 750 Ma is related to amain regional metamorphic event that reached the high amphibolite facies, recorded in rocks from the Itatins Complexand Cachoeira Sequence as well, which also belongs to the Registro Domain. The paragneissic rocks of this study areaffected by the E-W-trending Serrinha Shear Zone, registering a predominantly dextral movement. Biotite K-Ar agesof 482 ± 12 Ma may represent later movements and reflect the younger ages of reactivation of the major lineamentsand juxtaposition of the tectonic blocks involved. 2007 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32779308 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.3 Vol.79 |
| title | Structural and geochronological constraints on the evolution of the Juréia Massif, Registro Domain, State of São Paulo, Brazil |
| topic | Multidisciplinaria (Ciencias Naturales y Exactas) shear zone gneissic rocks tectonic domain Pb geochronology |
| url | https://www.redalyc.org/articulo.oa?id=32779308 |