Estratigrafia do batólito Florianópolis, cinturão Dom Feliciano, na região de Garopaba-Paulo Lopes, SC
Autor(a) principal: | |
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Data de Publicação: | 2008 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/22647 |
Resumo: | In southern Brazil, the Florianopolis Batholith results from prolonged, mainly granitic magmatism, as part of the Neoproterozoic Dom Feliciano Belt. Plutonic associations in this belt are related to transpressive tectonism (650-580 Ma) in post-collisional setting, where the translithospheric discontinuities of the Southern Brazilian Shear Belt have triggered magmatism, acting as channels for melts originated in deep crustal or mantle sources. In the region of Garopaba-Paulo Lopes, a fraction of this magmatism was studied, resulting in a formal proposition for its stratigraphic organization in igneous suites. A small volume of gneissic host rocks is found as roof pendants. The Paulo Lopes Suite comprises the foliated Paulo Lopes Granite, Garopaba Granitoids and Silveira Gabbro. It is characterized as porphyritic granitoids of high-K tholeiitic affinity, coeval with mafic, tholeiitic magmatism.It is followed by metaluminous, alkaline series granitoids of the Pedras Grandes Suite, namely the Vila da Penha Granite, comprising heterogranular and porphyritic facies, and the Serra do Tabuleiro Granite, comprising heterogranular, equigranular and porphyritic facies. The Cambirela Suite, last magmatic episode in the study area, encompasses alkaline plutonic, volcanic and subvolcanic rock types, as the Ilha Granite, the Cambirela Rhyolite and the Itacorumbi Granite. Hypabissal rocks are also part of this suite, and result from recurrent acid and basic magma pulses emplaced either as idividual dykes or composite ones. The magmatic associations described in this region attest to magma emplacement under a moderate to low stress field, possibly extinguished by the time the Cambirela Suite crystallized. Their age values indicate that they are mostly contemporaneous to the post-collisional, syntectonic magmatism of the Southern Brazilian Shear Belt, and the preservation of magmatic structures such as modal layering, relatively uncomon in granitoids, may also be attributed to their emplacement far from the main deformation sites. Features indicative of coeval mafic and felsic magmas are described in all three magmatic associations, and are especially significant in the Paulo Lopes and Cambirela suites. They attest to continuous mantle participation in the batholith construction. |
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Bitencourt, Maria de Fatima Aparecida SaraivaBongiolo, Everton MarquesPhilipp, Ruy PauloMorales, Luiz Fernando GrafulhaRubert, Rogério RoqueMelo, Clarissa LovattoLuft Júnior, João Luiz2010-05-20T04:16:31Z20081518-2398http://hdl.handle.net/10183/22647000671498In southern Brazil, the Florianopolis Batholith results from prolonged, mainly granitic magmatism, as part of the Neoproterozoic Dom Feliciano Belt. Plutonic associations in this belt are related to transpressive tectonism (650-580 Ma) in post-collisional setting, where the translithospheric discontinuities of the Southern Brazilian Shear Belt have triggered magmatism, acting as channels for melts originated in deep crustal or mantle sources. In the region of Garopaba-Paulo Lopes, a fraction of this magmatism was studied, resulting in a formal proposition for its stratigraphic organization in igneous suites. A small volume of gneissic host rocks is found as roof pendants. The Paulo Lopes Suite comprises the foliated Paulo Lopes Granite, Garopaba Granitoids and Silveira Gabbro. It is characterized as porphyritic granitoids of high-K tholeiitic affinity, coeval with mafic, tholeiitic magmatism.It is followed by metaluminous, alkaline series granitoids of the Pedras Grandes Suite, namely the Vila da Penha Granite, comprising heterogranular and porphyritic facies, and the Serra do Tabuleiro Granite, comprising heterogranular, equigranular and porphyritic facies. The Cambirela Suite, last magmatic episode in the study area, encompasses alkaline plutonic, volcanic and subvolcanic rock types, as the Ilha Granite, the Cambirela Rhyolite and the Itacorumbi Granite. Hypabissal rocks are also part of this suite, and result from recurrent acid and basic magma pulses emplaced either as idividual dykes or composite ones. The magmatic associations described in this region attest to magma emplacement under a moderate to low stress field, possibly extinguished by the time the Cambirela Suite crystallized. Their age values indicate that they are mostly contemporaneous to the post-collisional, syntectonic magmatism of the Southern Brazilian Shear Belt, and the preservation of magmatic structures such as modal layering, relatively uncomon in granitoids, may also be attributed to their emplacement far from the main deformation sites. Features indicative of coeval mafic and felsic magmas are described in all three magmatic associations, and are especially significant in the Paulo Lopes and Cambirela suites. They attest to continuous mantle participation in the batholith construction.application/pdfporPesquisas em Geociências. Vol.35, n. 1 (2008), p. 109-136EstratigrafiaGranitoid stratigraphyPost-collisional magmatismPlutonic suitesEstratigrafia do batólito Florianópolis, cinturão Dom Feliciano, na região de Garopaba-Paulo Lopes, SCinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000671498.pdf000671498.pdfTexto completoapplication/pdf3742091http://www.lume.ufrgs.br/bitstream/10183/22647/1/000671498.pdfe12c847969e7755f5effcb91ee5783edMD51TEXT000671498.pdf.txt000671498.pdf.txtExtracted Texttext/plain97255http://www.lume.ufrgs.br/bitstream/10183/22647/2/000671498.pdf.txt58f1b543600d82ae7aaec31b93d68195MD52THUMBNAIL000671498.pdf.jpg000671498.pdf.jpgGenerated Thumbnailimage/jpeg1939http://www.lume.ufrgs.br/bitstream/10183/22647/3/000671498.pdf.jpg1df312c01b7db4126cea68d041b234b1MD5310183/226472018-10-18 07:18:43.84oai:www.lume.ufrgs.br:10183/22647Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-18T10:18:43Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Estratigrafia do batólito Florianópolis, cinturão Dom Feliciano, na região de Garopaba-Paulo Lopes, SC |
title |
Estratigrafia do batólito Florianópolis, cinturão Dom Feliciano, na região de Garopaba-Paulo Lopes, SC |
spellingShingle |
Estratigrafia do batólito Florianópolis, cinturão Dom Feliciano, na região de Garopaba-Paulo Lopes, SC Bitencourt, Maria de Fatima Aparecida Saraiva Estratigrafia Granitoid stratigraphy Post-collisional magmatism Plutonic suites |
title_short |
Estratigrafia do batólito Florianópolis, cinturão Dom Feliciano, na região de Garopaba-Paulo Lopes, SC |
title_full |
Estratigrafia do batólito Florianópolis, cinturão Dom Feliciano, na região de Garopaba-Paulo Lopes, SC |
title_fullStr |
Estratigrafia do batólito Florianópolis, cinturão Dom Feliciano, na região de Garopaba-Paulo Lopes, SC |
title_full_unstemmed |
Estratigrafia do batólito Florianópolis, cinturão Dom Feliciano, na região de Garopaba-Paulo Lopes, SC |
title_sort |
Estratigrafia do batólito Florianópolis, cinturão Dom Feliciano, na região de Garopaba-Paulo Lopes, SC |
author |
Bitencourt, Maria de Fatima Aparecida Saraiva |
author_facet |
Bitencourt, Maria de Fatima Aparecida Saraiva Bongiolo, Everton Marques Philipp, Ruy Paulo Morales, Luiz Fernando Grafulha Rubert, Rogério Roque Melo, Clarissa Lovatto Luft Júnior, João Luiz |
author_role |
author |
author2 |
Bongiolo, Everton Marques Philipp, Ruy Paulo Morales, Luiz Fernando Grafulha Rubert, Rogério Roque Melo, Clarissa Lovatto Luft Júnior, João Luiz |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Bitencourt, Maria de Fatima Aparecida Saraiva Bongiolo, Everton Marques Philipp, Ruy Paulo Morales, Luiz Fernando Grafulha Rubert, Rogério Roque Melo, Clarissa Lovatto Luft Júnior, João Luiz |
dc.subject.por.fl_str_mv |
Estratigrafia |
topic |
Estratigrafia Granitoid stratigraphy Post-collisional magmatism Plutonic suites |
dc.subject.eng.fl_str_mv |
Granitoid stratigraphy Post-collisional magmatism Plutonic suites |
description |
In southern Brazil, the Florianopolis Batholith results from prolonged, mainly granitic magmatism, as part of the Neoproterozoic Dom Feliciano Belt. Plutonic associations in this belt are related to transpressive tectonism (650-580 Ma) in post-collisional setting, where the translithospheric discontinuities of the Southern Brazilian Shear Belt have triggered magmatism, acting as channels for melts originated in deep crustal or mantle sources. In the region of Garopaba-Paulo Lopes, a fraction of this magmatism was studied, resulting in a formal proposition for its stratigraphic organization in igneous suites. A small volume of gneissic host rocks is found as roof pendants. The Paulo Lopes Suite comprises the foliated Paulo Lopes Granite, Garopaba Granitoids and Silveira Gabbro. It is characterized as porphyritic granitoids of high-K tholeiitic affinity, coeval with mafic, tholeiitic magmatism.It is followed by metaluminous, alkaline series granitoids of the Pedras Grandes Suite, namely the Vila da Penha Granite, comprising heterogranular and porphyritic facies, and the Serra do Tabuleiro Granite, comprising heterogranular, equigranular and porphyritic facies. The Cambirela Suite, last magmatic episode in the study area, encompasses alkaline plutonic, volcanic and subvolcanic rock types, as the Ilha Granite, the Cambirela Rhyolite and the Itacorumbi Granite. Hypabissal rocks are also part of this suite, and result from recurrent acid and basic magma pulses emplaced either as idividual dykes or composite ones. The magmatic associations described in this region attest to magma emplacement under a moderate to low stress field, possibly extinguished by the time the Cambirela Suite crystallized. Their age values indicate that they are mostly contemporaneous to the post-collisional, syntectonic magmatism of the Southern Brazilian Shear Belt, and the preservation of magmatic structures such as modal layering, relatively uncomon in granitoids, may also be attributed to their emplacement far from the main deformation sites. Features indicative of coeval mafic and felsic magmas are described in all three magmatic associations, and are especially significant in the Paulo Lopes and Cambirela suites. They attest to continuous mantle participation in the batholith construction. |
publishDate |
2008 |
dc.date.issued.fl_str_mv |
2008 |
dc.date.accessioned.fl_str_mv |
2010-05-20T04:16:31Z |
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info:eu-repo/semantics/article info:eu-repo/semantics/other |
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publishedVersion |
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http://hdl.handle.net/10183/22647 |
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1518-2398 |
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000671498 |
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1518-2398 000671498 |
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http://hdl.handle.net/10183/22647 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.ispartof.pt_BR.fl_str_mv |
Pesquisas em Geociências. Vol.35, n. 1 (2008), p. 109-136 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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