Mármores da região de Itaoca (ES) e escarnitos no contato com diques máficos e félsicos : mineralogia e petrogênese.
Autor(a) principal: | |
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Data de Publicação: | 2000 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFOP |
Texto Completo: | http://www.repositorio.ufop.br/handle/123456789/8232 https://doi.org/10.18285/geonomos.v8i2.158 |
Resumo: | Skarns at the contact of marbles and mafic as well as felsic dikes located in the Itaoca region (Espírito Santo State, eastern Brazil) were investigated in terms of mineralogy and genesis. Marbles and the older mafic dykes were affected by high grade metamorphism of Brasiliano age, as comproved by the presence of spinel. The undeformed younger granitic dykes are post-tectonic. Skarns related to the granite dykes were formed as outcomes of silica addition in marble layers during the intrusion, generating zones composed of i)olivine + carbonate + pyroxene + amphibole ± phlogopite; ii)pyroxene + amphibole ± phlogopite ± scapolite, and iii)pyroxene ± phlogopite. The last mineral association occurs close to the granite and shows the maximum silica enrichment. Evidence of Ca-metassomatism in the granite is shown by the strongly zoned plagioclase crystals, which show central portions with An17 and border zone with An43. Skarns generated at the contact with amphibolite dykes are wider than the former, probably because the original contact metamorphic reaction zones generated during the intusion were reinforced by granulite facies metamorphism. The reaction aureoles display the following mineral associations: i) carbonate ± olivine, ii) carbonate + diopside ± scapolite ± epidote, iii) plagioclase + diopside ± scapolite ± epidote, and iv) amphibole + plagioclase ± phlogopite ± hercinite ± grossularite. The first association belongs to the marble at the contact, and the last to the amphibolite. There are mineralogical and textural evidences for metamorphic and metassomatic reactions due to the migration of Ca, Mg and Si, leading, for example, to the scapolitization of the plagioclase. |
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Evangelista, Hanna JordtViana, Deiwys José2017-07-13T13:02:05Z2017-07-13T13:02:05Z2000EVANGELISTA, H. J.; VIANA, D. J. Mármores da região de Itaoca (ES) e escarnitos no contato com diques máficos e félsicos: mineralogia e petrogênese. Geonomos, Belo Horizonte, v. 8, n.2, p. 61-67, 2000. Disponível em: <https://periodicos.ufmg.br/index.php/revistageonomos/article/view/11574>. Acesso em: 20 jun. 2017.0104-4486http://www.repositorio.ufop.br/handle/123456789/8232https://doi.org/10.18285/geonomos.v8i2.158Skarns at the contact of marbles and mafic as well as felsic dikes located in the Itaoca region (Espírito Santo State, eastern Brazil) were investigated in terms of mineralogy and genesis. Marbles and the older mafic dykes were affected by high grade metamorphism of Brasiliano age, as comproved by the presence of spinel. The undeformed younger granitic dykes are post-tectonic. Skarns related to the granite dykes were formed as outcomes of silica addition in marble layers during the intrusion, generating zones composed of i)olivine + carbonate + pyroxene + amphibole ± phlogopite; ii)pyroxene + amphibole ± phlogopite ± scapolite, and iii)pyroxene ± phlogopite. The last mineral association occurs close to the granite and shows the maximum silica enrichment. Evidence of Ca-metassomatism in the granite is shown by the strongly zoned plagioclase crystals, which show central portions with An17 and border zone with An43. Skarns generated at the contact with amphibolite dykes are wider than the former, probably because the original contact metamorphic reaction zones generated during the intusion were reinforced by granulite facies metamorphism. The reaction aureoles display the following mineral associations: i) carbonate ± olivine, ii) carbonate + diopside ± scapolite ± epidote, iii) plagioclase + diopside ± scapolite ± epidote, and iv) amphibole + plagioclase ± phlogopite ± hercinite ± grossularite. The first association belongs to the marble at the contact, and the last to the amphibolite. There are mineralogical and textural evidences for metamorphic and metassomatic reactions due to the migration of Ca, Mg and Si, leading, for example, to the scapolitization of the plagioclase.Os direitos autorais dos trabalhos publicados na Geonomos são do autor, com direitos de primeira publicação para a revista. Fonte: Geonomos <https://periodicos.ufmg.br/index.php/revistageonomos/about/submissions>. Acesso em: 24 set. 2019.info:eu-repo/semantics/openAccessMármores da região de Itaoca (ES) e escarnitos no contato com diques máficos e félsicos : mineralogia e petrogênese.info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleporreponame:Repositório Institucional da UFOPinstname:Universidade Federal de Ouro Preto (UFOP)instacron:UFOPLICENSElicense.txtlicense.txttext/plain; charset=utf-8924http://www.repositorio.ufop.br/bitstream/123456789/8232/2/license.txt62604f8d955274beb56c80ce1ee5dcaeMD52ORIGINALARTIGO_MarmoresRegiãoItaoca.pdfARTIGO_MarmoresRegiãoItaoca.pdfapplication/pdf250528http://www.repositorio.ufop.br/bitstream/123456789/8232/1/ARTIGO_MarmoresRegi%c3%a3oItaoca.pdf590adf76684b05f98555aa93affef2b2MD51123456789/82322019-12-13 11:42:37.856oai:localhost: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ório InstitucionalPUBhttp://www.repositorio.ufop.br/oai/requestrepositorio@ufop.edu.bropendoar:32332019-12-13T16:42:37Repositório Institucional da UFOP - Universidade Federal de Ouro Preto (UFOP)false |
dc.title.pt_BR.fl_str_mv |
Mármores da região de Itaoca (ES) e escarnitos no contato com diques máficos e félsicos : mineralogia e petrogênese. |
title |
Mármores da região de Itaoca (ES) e escarnitos no contato com diques máficos e félsicos : mineralogia e petrogênese. |
spellingShingle |
Mármores da região de Itaoca (ES) e escarnitos no contato com diques máficos e félsicos : mineralogia e petrogênese. Evangelista, Hanna Jordt |
title_short |
Mármores da região de Itaoca (ES) e escarnitos no contato com diques máficos e félsicos : mineralogia e petrogênese. |
title_full |
Mármores da região de Itaoca (ES) e escarnitos no contato com diques máficos e félsicos : mineralogia e petrogênese. |
title_fullStr |
Mármores da região de Itaoca (ES) e escarnitos no contato com diques máficos e félsicos : mineralogia e petrogênese. |
title_full_unstemmed |
Mármores da região de Itaoca (ES) e escarnitos no contato com diques máficos e félsicos : mineralogia e petrogênese. |
title_sort |
Mármores da região de Itaoca (ES) e escarnitos no contato com diques máficos e félsicos : mineralogia e petrogênese. |
author |
Evangelista, Hanna Jordt |
author_facet |
Evangelista, Hanna Jordt Viana, Deiwys José |
author_role |
author |
author2 |
Viana, Deiwys José |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Evangelista, Hanna Jordt Viana, Deiwys José |
description |
Skarns at the contact of marbles and mafic as well as felsic dikes located in the Itaoca region (Espírito Santo State, eastern Brazil) were investigated in terms of mineralogy and genesis. Marbles and the older mafic dykes were affected by high grade metamorphism of Brasiliano age, as comproved by the presence of spinel. The undeformed younger granitic dykes are post-tectonic. Skarns related to the granite dykes were formed as outcomes of silica addition in marble layers during the intrusion, generating zones composed of i)olivine + carbonate + pyroxene + amphibole ± phlogopite; ii)pyroxene + amphibole ± phlogopite ± scapolite, and iii)pyroxene ± phlogopite. The last mineral association occurs close to the granite and shows the maximum silica enrichment. Evidence of Ca-metassomatism in the granite is shown by the strongly zoned plagioclase crystals, which show central portions with An17 and border zone with An43. Skarns generated at the contact with amphibolite dykes are wider than the former, probably because the original contact metamorphic reaction zones generated during the intusion were reinforced by granulite facies metamorphism. The reaction aureoles display the following mineral associations: i) carbonate ± olivine, ii) carbonate + diopside ± scapolite ± epidote, iii) plagioclase + diopside ± scapolite ± epidote, and iv) amphibole + plagioclase ± phlogopite ± hercinite ± grossularite. The first association belongs to the marble at the contact, and the last to the amphibolite. There are mineralogical and textural evidences for metamorphic and metassomatic reactions due to the migration of Ca, Mg and Si, leading, for example, to the scapolitization of the plagioclase. |
publishDate |
2000 |
dc.date.issued.fl_str_mv |
2000 |
dc.date.accessioned.fl_str_mv |
2017-07-13T13:02:05Z |
dc.date.available.fl_str_mv |
2017-07-13T13:02:05Z |
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info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
EVANGELISTA, H. J.; VIANA, D. J. Mármores da região de Itaoca (ES) e escarnitos no contato com diques máficos e félsicos: mineralogia e petrogênese. Geonomos, Belo Horizonte, v. 8, n.2, p. 61-67, 2000. Disponível em: <https://periodicos.ufmg.br/index.php/revistageonomos/article/view/11574>. Acesso em: 20 jun. 2017. |
dc.identifier.uri.fl_str_mv |
http://www.repositorio.ufop.br/handle/123456789/8232 |
dc.identifier.issn.none.fl_str_mv |
0104-4486 |
dc.identifier.doi.none.fl_str_mv |
https://doi.org/10.18285/geonomos.v8i2.158 |
identifier_str_mv |
EVANGELISTA, H. J.; VIANA, D. J. Mármores da região de Itaoca (ES) e escarnitos no contato com diques máficos e félsicos: mineralogia e petrogênese. Geonomos, Belo Horizonte, v. 8, n.2, p. 61-67, 2000. Disponível em: <https://periodicos.ufmg.br/index.php/revistageonomos/article/view/11574>. Acesso em: 20 jun. 2017. 0104-4486 |
url |
http://www.repositorio.ufop.br/handle/123456789/8232 https://doi.org/10.18285/geonomos.v8i2.158 |
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