Plutonismo proterozoico en Antártida: el Granito Bertrab y su cortejo de diques
Bertrab Nunatak is located in the Vahsel Bay area, Weddell Sea, Antarctica. It is composed of a granitic body, «Granito Bertrab», cut by acid aplite/rhyolite and quartz veins) and basic dyke-swarms. Granito Bertrab is a coarse-grained, granophyric quartz-feldspar biotite granite with minor normativ...
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ftconicet:oai:ri.conicet.gov.ar:11336/156199 2023-10-09T21:45:32+02:00 Plutonismo proterozoico en Antártida: el Granito Bertrab y su cortejo de diques Acevedo, Rogelio Daniel Linares, Enrique Alberdi Valin, Maria Luz Ostera, Hector Adolfo Martín Izard, Agustín application/pdf http://hdl.handle.net/11336/156199 spa spa Asociación Geológica Argentina info:eu-repo/semantics/altIdentifier/url/https://revista.geologica.org.ar/raga/issue/view/23 http://hdl.handle.net/11336/156199 Acevedo, Rogelio Daniel; Linares, Enrique; Alberdi Valin, Maria Luz; Ostera, Hector Adolfo; Martín Izard, Agustín; Plutonismo proterozoico en Antártida: el Granito Bertrab y su cortejo de diques; Asociación Geológica Argentina; Revista de la Asociación Geológica Argentina; 55; 3; 12-2000; 179-187 0004-4822 1851-8249 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc/2.5/ar/ GRANITO BERTRAB EDAD ISOTÓPICA ANTÁRTIDA https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet 2023-09-24T18:51:49Z Bertrab Nunatak is located in the Vahsel Bay area, Weddell Sea, Antarctica. It is composed of a granitic body, «Granito Bertrab», cut by acid aplite/rhyolite and quartz veins) and basic dyke-swarms. Granito Bertrab is a coarse-grained, granophyric quartz-feldspar biotite granite with minor normative corundum (1%) that indicates peraluminous affinities. Melanocratic calc-alkaline dykes, with labradorite-andesine and amphibole megacrysts, have a lamprophyric character. One of these is cut by a leucocratic dike, that represents the final stage in the magmatic activity. Petrological evidence indicates that there is a temporally, spatially and genetically intimate association bewteen the granite and the dykes. K-Ar data on samples of the granite give an age of 996 ± 40 Ma, and the Rb-Sr isochron age recalculated using the published data of Eastin and Faure give an age of 971 ± 8 Ma using five samples, and 992 ± 12 Ma when the aplitic member is not included. These results are in good agreement with the K-Ar age and mean that the Granito Bertrab was emplaced in the late Mesoproterozoic. Fil: Acevedo, Rogelio Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina Fil: Linares, Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geocronología y Geología Isotópica. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geocronología y Geología Isotópica; Argentina Fil: Alberdi Valin, Maria Luz. Universidad de Oviedo; España Fil: Ostera, Hector Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geocronología y Geología Isotópica. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geocronología y Geología Isotópica; Argentina Fil: Martín Izard, Agustín. Universidad de Oviedo; España Article in Journal/Newspaper Antarc* Antarctica Antártida Vahsel Bay Weddell Sea CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Argentina Austral Bertrab ENVELOPE(-34.533,-34.533,-77.917,-77.917) Bertrab nunatak ENVELOPE(-34.633,-34.633,-77.883,-77.883) Faure ENVELOPE(-68.871,-68.871,-68.093,-68.093) Granito ENVELOPE(-60.783,-60.783,-62.450,-62.450) Hector ENVELOPE(-63.376,-63.376,-64.579,-64.579) Vahsel ENVELOPE(-35.117,-35.117,-77.817,-77.817) Vahsel Bay ENVELOPE(-35.166,-35.166,-77.816,-77.816) Weddell Weddell Sea |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
Spanish |
topic |
GRANITO BERTRAB EDAD ISOTÓPICA ANTÁRTIDA https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
GRANITO BERTRAB EDAD ISOTÓPICA ANTÁRTIDA https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Acevedo, Rogelio Daniel Linares, Enrique Alberdi Valin, Maria Luz Ostera, Hector Adolfo Martín Izard, Agustín Plutonismo proterozoico en Antártida: el Granito Bertrab y su cortejo de diques |
topic_facet |
GRANITO BERTRAB EDAD ISOTÓPICA ANTÁRTIDA https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
Bertrab Nunatak is located in the Vahsel Bay area, Weddell Sea, Antarctica. It is composed of a granitic body, «Granito Bertrab», cut by acid aplite/rhyolite and quartz veins) and basic dyke-swarms. Granito Bertrab is a coarse-grained, granophyric quartz-feldspar biotite granite with minor normative corundum (1%) that indicates peraluminous affinities. Melanocratic calc-alkaline dykes, with labradorite-andesine and amphibole megacrysts, have a lamprophyric character. One of these is cut by a leucocratic dike, that represents the final stage in the magmatic activity. Petrological evidence indicates that there is a temporally, spatially and genetically intimate association bewteen the granite and the dykes. K-Ar data on samples of the granite give an age of 996 ± 40 Ma, and the Rb-Sr isochron age recalculated using the published data of Eastin and Faure give an age of 971 ± 8 Ma using five samples, and 992 ± 12 Ma when the aplitic member is not included. These results are in good agreement with the K-Ar age and mean that the Granito Bertrab was emplaced in the late Mesoproterozoic. Fil: Acevedo, Rogelio Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina Fil: Linares, Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geocronología y Geología Isotópica. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geocronología y Geología Isotópica; Argentina Fil: Alberdi Valin, Maria Luz. Universidad de Oviedo; España Fil: Ostera, Hector Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geocronología y Geología Isotópica. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geocronología y Geología Isotópica; Argentina Fil: Martín Izard, Agustín. Universidad de Oviedo; España |
format |
Article in Journal/Newspaper |
author |
Acevedo, Rogelio Daniel Linares, Enrique Alberdi Valin, Maria Luz Ostera, Hector Adolfo Martín Izard, Agustín |
author_facet |
Acevedo, Rogelio Daniel Linares, Enrique Alberdi Valin, Maria Luz Ostera, Hector Adolfo Martín Izard, Agustín |
author_sort |
Acevedo, Rogelio Daniel |
title |
Plutonismo proterozoico en Antártida: el Granito Bertrab y su cortejo de diques |
title_short |
Plutonismo proterozoico en Antártida: el Granito Bertrab y su cortejo de diques |
title_full |
Plutonismo proterozoico en Antártida: el Granito Bertrab y su cortejo de diques |
title_fullStr |
Plutonismo proterozoico en Antártida: el Granito Bertrab y su cortejo de diques |
title_full_unstemmed |
Plutonismo proterozoico en Antártida: el Granito Bertrab y su cortejo de diques |
title_sort |
plutonismo proterozoico en antártida: el granito bertrab y su cortejo de diques |
publisher |
Asociación Geológica Argentina |
url |
http://hdl.handle.net/11336/156199 |
long_lat |
ENVELOPE(-34.533,-34.533,-77.917,-77.917) ENVELOPE(-34.633,-34.633,-77.883,-77.883) ENVELOPE(-68.871,-68.871,-68.093,-68.093) ENVELOPE(-60.783,-60.783,-62.450,-62.450) ENVELOPE(-63.376,-63.376,-64.579,-64.579) ENVELOPE(-35.117,-35.117,-77.817,-77.817) ENVELOPE(-35.166,-35.166,-77.816,-77.816) |
geographic |
Argentina Austral Bertrab Bertrab nunatak Faure Granito Hector Vahsel Vahsel Bay Weddell Weddell Sea |
geographic_facet |
Argentina Austral Bertrab Bertrab nunatak Faure Granito Hector Vahsel Vahsel Bay Weddell Weddell Sea |
genre |
Antarc* Antarctica Antártida Vahsel Bay Weddell Sea |
genre_facet |
Antarc* Antarctica Antártida Vahsel Bay Weddell Sea |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://revista.geologica.org.ar/raga/issue/view/23 http://hdl.handle.net/11336/156199 Acevedo, Rogelio Daniel; Linares, Enrique; Alberdi Valin, Maria Luz; Ostera, Hector Adolfo; Martín Izard, Agustín; Plutonismo proterozoico en Antártida: el Granito Bertrab y su cortejo de diques; Asociación Geológica Argentina; Revista de la Asociación Geológica Argentina; 55; 3; 12-2000; 179-187 0004-4822 1851-8249 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc/2.5/ar/ |
_version_ |
1779319616298811392 |