Mesozoic magmatism in east uruguay: petrological constraints related to the sierra san miguel region

This work presents new results of a detailed geological and structural investigation focusing the easternmost Uruguayan Mesozoic magmatic occurrences related to the south Atlantic opening. Lithological descriptions, their stratigraphic relationships and complimentary lithochemical characterizations...

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Autores:
Muzio, Rossana
Peel, Elena
Morales, Ethel
Veroslavsky, Gerardo
Conti, Bruno
Tipo de recurso:
Article of journal
Fecha de publicación:
2009
Institución:
Universidad Nacional de Colombia
Repositorio:
Universidad Nacional de Colombia
Idioma:
spa
OAI Identifier:
oai:repositorio.unal.edu.co:unal/33934
Acceso en línea:
https://repositorio.unal.edu.co/handle/unal/33934
http://bdigital.unal.edu.co/24014/
http://bdigital.unal.edu.co/24014/2/
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openAccess
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Atribución-NoComercial 4.0 Internacional
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spelling Atribución-NoComercial 4.0 InternacionalDerechos reservados - Universidad Nacional de Colombiahttp://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Muzio, Rossana828b3b40-71c5-4d2c-b43d-151553d796eb300Peel, Elena830b78be-398e-455b-ad64-597acf5d13ce300Morales, Ethel8160163f-4c81-4906-b0e4-8d5a5c028fb9300Veroslavsky, Gerardo7dde886a-27e6-406c-8e3a-87bce8cc450a300Conti, Bruno23ac9fc4-251b-43a1-a28e-b175f12524663002019-06-27T23:07:28Z2019-06-27T23:07:28Z2009https://repositorio.unal.edu.co/handle/unal/33934http://bdigital.unal.edu.co/24014/http://bdigital.unal.edu.co/24014/2/This work presents new results of a detailed geological and structural investigation focusing the easternmost Uruguayan Mesozoic magmatic occurrences related to the south Atlantic opening. Lithological descriptions, their stratigraphic relationships and complimentary lithochemical characterizations carried out in the San Miguel region (East Uruguay) are presented. Three volcanic/sub-volcanic units have been recognized. The felsic volcanic association is composed by rhyolitic - dacitic flows, mainly with porphyritic textures and sub-alkalinenature and related pyroclastic rocks. The felsic sub-volcanic association is characterized by granophyres of about 25 km2 of exposed area, cross- cut by mafic and felsic dykes. Finally, a mafic association has been identified characterized by dykes and a small intrusion of gabbroic composition.All these units are Mesozoic in age (130 - 127 Ma) and according to their chemical nature they correspond tosub-alkaline to weak peralkaline magmas.application/pdfspaUNIVERSIDAD NACIONAL DE COLOMBIAhttp://revistas.unal.edu.co/index.php/esrj/article/view/21114Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research JournalEarth Sciences Research JournalEarth Sciences Research Journal; Vol. 13, núm. 1 (2009); 16-29 Earth Sciences Research Journal; Vol. 13, núm. 1 (2009); 16-29 2339-3459 1794-6190Muzio, Rossana and Peel, Elena and Morales, Ethel and Veroslavsky, Gerardo and Conti, Bruno (2009) Mesozoic magmatism in east uruguay: petrological constraints related to the sierra san miguel region. Earth Sciences Research Journal; Vol. 13, núm. 1 (2009); 16-29 Earth Sciences Research Journal; Vol. 13, núm. 1 (2009); 16-29 2339-3459 1794-6190 .Mesozoic magmatism in east uruguay: petrological constraints related to the sierra san miguel regionArtículo de revistainfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501http://purl.org/coar/resource_type/c_2df8fbb1http://purl.org/coar/version/c_970fb48d4fbd8a85Texthttp://purl.org/redcol/resource_type/ARTORIGINAL21114-71593-1-PB.pdfapplication/pdf421568https://repositorio.unal.edu.co/bitstream/unal/33934/1/21114-71593-1-PB.pdf5760f67c0686e256cbadc319b2c46f8aMD51THUMBNAIL21114-71593-1-PB.pdf.jpg21114-71593-1-PB.pdf.jpgGenerated Thumbnailimage/jpeg6908https://repositorio.unal.edu.co/bitstream/unal/33934/2/21114-71593-1-PB.pdf.jpgd95eddd51f09d539faa38f6f0aca3e99MD52unal/33934oai:repositorio.unal.edu.co:unal/339342022-12-28 23:03:43.406Repositorio Institucional Universidad Nacional de Colombiarepositorio_nal@unal.edu.co
dc.title.spa.fl_str_mv Mesozoic magmatism in east uruguay: petrological constraints related to the sierra san miguel region
title Mesozoic magmatism in east uruguay: petrological constraints related to the sierra san miguel region
spellingShingle Mesozoic magmatism in east uruguay: petrological constraints related to the sierra san miguel region
title_short Mesozoic magmatism in east uruguay: petrological constraints related to the sierra san miguel region
title_full Mesozoic magmatism in east uruguay: petrological constraints related to the sierra san miguel region
title_fullStr Mesozoic magmatism in east uruguay: petrological constraints related to the sierra san miguel region
title_full_unstemmed Mesozoic magmatism in east uruguay: petrological constraints related to the sierra san miguel region
title_sort Mesozoic magmatism in east uruguay: petrological constraints related to the sierra san miguel region
dc.creator.fl_str_mv Muzio, Rossana
Peel, Elena
Morales, Ethel
Veroslavsky, Gerardo
Conti, Bruno
dc.contributor.author.spa.fl_str_mv Muzio, Rossana
Peel, Elena
Morales, Ethel
Veroslavsky, Gerardo
Conti, Bruno
description This work presents new results of a detailed geological and structural investigation focusing the easternmost Uruguayan Mesozoic magmatic occurrences related to the south Atlantic opening. Lithological descriptions, their stratigraphic relationships and complimentary lithochemical characterizations carried out in the San Miguel region (East Uruguay) are presented. Three volcanic/sub-volcanic units have been recognized. The felsic volcanic association is composed by rhyolitic - dacitic flows, mainly with porphyritic textures and sub-alkalinenature and related pyroclastic rocks. The felsic sub-volcanic association is characterized by granophyres of about 25 km2 of exposed area, cross- cut by mafic and felsic dykes. Finally, a mafic association has been identified characterized by dykes and a small intrusion of gabbroic composition.All these units are Mesozoic in age (130 - 127 Ma) and according to their chemical nature they correspond tosub-alkaline to weak peralkaline magmas.
publishDate 2009
dc.date.issued.spa.fl_str_mv 2009
dc.date.accessioned.spa.fl_str_mv 2019-06-27T23:07:28Z
dc.date.available.spa.fl_str_mv 2019-06-27T23:07:28Z
dc.type.spa.fl_str_mv Artículo de revista
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url https://repositorio.unal.edu.co/handle/unal/33934
http://bdigital.unal.edu.co/24014/
http://bdigital.unal.edu.co/24014/2/
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dc.relation.spa.fl_str_mv http://revistas.unal.edu.co/index.php/esrj/article/view/21114
dc.relation.ispartof.spa.fl_str_mv Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal
Earth Sciences Research Journal
dc.relation.ispartofseries.none.fl_str_mv Earth Sciences Research Journal; Vol. 13, núm. 1 (2009); 16-29 Earth Sciences Research Journal; Vol. 13, núm. 1 (2009); 16-29 2339-3459 1794-6190
dc.relation.references.spa.fl_str_mv Muzio, Rossana and Peel, Elena and Morales, Ethel and Veroslavsky, Gerardo and Conti, Bruno (2009) Mesozoic magmatism in east uruguay: petrological constraints related to the sierra san miguel region. Earth Sciences Research Journal; Vol. 13, núm. 1 (2009); 16-29 Earth Sciences Research Journal; Vol. 13, núm. 1 (2009); 16-29 2339-3459 1794-6190 .
dc.rights.spa.fl_str_mv Derechos reservados - Universidad Nacional de Colombia
dc.rights.coar.fl_str_mv http://purl.org/coar/access_right/c_abf2
dc.rights.license.spa.fl_str_mv Atribución-NoComercial 4.0 Internacional
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rights_invalid_str_mv Atribución-NoComercial 4.0 Internacional
Derechos reservados - Universidad Nacional de Colombia
http://creativecommons.org/licenses/by-nc/4.0/
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eu_rights_str_mv openAccess
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dc.publisher.spa.fl_str_mv UNIVERSIDAD NACIONAL DE COLOMBIA
institution Universidad Nacional de Colombia
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