Petrography, geochemistry and age of Cerro Frontino Gabro

The Gabro de Cerro Frontino was emplaced in the Cañasgordas Block, located in the Northern Segment of the Colombian Western Cordillera. It corresponds to a pluton composed of at least three magmatic pulses, emplaced during a short period of time. Gabbros and diorites are more common in the unit than...

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Autores:
Rodríguez-García, Gabriel
Bermúdez-Cordero, Jose Gilberto
Tipo de recurso:
Article of journal
Fecha de publicación:
2015
Institución:
Universidad Nacional de Colombia
Repositorio:
Universidad Nacional de Colombia
Idioma:
spa
OAI Identifier:
oai:repositorio.unal.edu.co:unal/61855
Acceso en línea:
https://repositorio.unal.edu.co/handle/unal/61855
http://bdigital.unal.edu.co/60667/
Palabra clave:
55 Ciencias de la tierra / Earth sciences and geology
Gabro de Cerro Frontino
Western Cordillera
Botón Arc
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openAccess
License
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_abf2Rodríguez-García, Gabrieledc4ce74-d0de-4f47-b16b-e10b5b753bb9300Bermúdez-Cordero, Jose Gilberto9561c144-cb3d-4ab4-bff8-43d8be5b49da3002019-07-02T20:46:29Z2019-07-02T20:46:29Z2015-07-01ISSN: 2357-3740https://repositorio.unal.edu.co/handle/unal/61855http://bdigital.unal.edu.co/60667/The Gabro de Cerro Frontino was emplaced in the Cañasgordas Block, located in the Northern Segment of the Colombian Western Cordillera. It corresponds to a pluton composed of at least three magmatic pulses, emplaced during a short period of time. Gabbros and diorites are more common in the unit than clinopiroxenites, monzodiorites and monzonites. These rocks are composed of calcic to intermediate plagioclase, augite-egerine type clinopyroxene and biotite; olivine and flogopite may be present in some mafic rocks and alkali feldspar and quartz may be present in some felsic rocks. Sphene, magnetite and apatite are common accessory minerals. The silica content in the rocks varies between 37.08% and 54.4%, with constant values of MnO (0.1% 0.4%), impoverishment of Fe2O3, MgO, CaO, TiO2 and P2O5 as SiO2 increases, and enrichment of K2O, Na2O and Al2O3 as SiO2 increases. The basic and ultrabasic rocks fall in the subalkaline series, the rest of the samples fall in the medium to K-rich calc-alkaline series and in the shoshonitic series. The Gabro de Cerro Frontino corresponds to magmas impoverished on heavy rare earth elements with respect to light rare earth elements, which suggests the contribution of a subduction component in the magma genesis. The LILE (Sr, K, Rb, Pb, Ba) are enriched with respect to the HFSE values that are relatively flat and impoverished; the unit also exhibits a negative anomaly of Nb with respect to Th and Ce, being a magmatic arc the environment of generation. The ages obtained in biotite using the Ar-Ar method fall between 9.87±0.18 Ma and 11.44±0.36 Ma, Middle to upper Miocene (Tortonian-Serravallian), similar to age of other plutons that are part of the Botón Arc.application/pdfspaUniversidad Nacional de Colombia - Sede Medellín - Facultad de Minashttps://revistas.unal.edu.co/index.php/rbct/article/view/46053Universidad Nacional de Colombia Revistas electrónicas UN Boletín Ciencias de la TierraBoletín Ciencias de la TierraRodríguez-García, Gabriel and Bermúdez-Cordero, Jose Gilberto (2015) Petrography, geochemistry and age of Cerro Frontino Gabro. Boletín de Ciencias de la Tierra (38). pp. 25-40. ISSN 2357-374055 Ciencias de la tierra / Earth sciences and geologyGabro de Cerro FrontinoWestern CordilleraBotón ArcPetrography, geochemistry and age of Cerro Frontino GabroArtículo 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/ARTORIGINAL46053-255391-1-PB.pdfapplication/pdf9954521https://repositorio.unal.edu.co/bitstream/unal/61855/1/46053-255391-1-PB.pdfde19dc07f2462113be385747fac32dfdMD51THUMBNAIL46053-255391-1-PB.pdf.jpg46053-255391-1-PB.pdf.jpgGenerated Thumbnailimage/jpeg9431https://repositorio.unal.edu.co/bitstream/unal/61855/2/46053-255391-1-PB.pdf.jpg3a71ac35254af0b810e131f4dd5339bfMD52unal/61855oai:repositorio.unal.edu.co:unal/618552024-04-20 23:26:08.587Repositorio Institucional Universidad Nacional de Colombiarepositorio_nal@unal.edu.co
dc.title.spa.fl_str_mv Petrography, geochemistry and age of Cerro Frontino Gabro
title Petrography, geochemistry and age of Cerro Frontino Gabro
spellingShingle Petrography, geochemistry and age of Cerro Frontino Gabro
55 Ciencias de la tierra / Earth sciences and geology
Gabro de Cerro Frontino
Western Cordillera
Botón Arc
title_short Petrography, geochemistry and age of Cerro Frontino Gabro
title_full Petrography, geochemistry and age of Cerro Frontino Gabro
title_fullStr Petrography, geochemistry and age of Cerro Frontino Gabro
title_full_unstemmed Petrography, geochemistry and age of Cerro Frontino Gabro
title_sort Petrography, geochemistry and age of Cerro Frontino Gabro
dc.creator.fl_str_mv Rodríguez-García, Gabriel
Bermúdez-Cordero, Jose Gilberto
dc.contributor.author.spa.fl_str_mv Rodríguez-García, Gabriel
Bermúdez-Cordero, Jose Gilberto
dc.subject.ddc.spa.fl_str_mv 55 Ciencias de la tierra / Earth sciences and geology
topic 55 Ciencias de la tierra / Earth sciences and geology
Gabro de Cerro Frontino
Western Cordillera
Botón Arc
dc.subject.proposal.spa.fl_str_mv Gabro de Cerro Frontino
Western Cordillera
Botón Arc
description The Gabro de Cerro Frontino was emplaced in the Cañasgordas Block, located in the Northern Segment of the Colombian Western Cordillera. It corresponds to a pluton composed of at least three magmatic pulses, emplaced during a short period of time. Gabbros and diorites are more common in the unit than clinopiroxenites, monzodiorites and monzonites. These rocks are composed of calcic to intermediate plagioclase, augite-egerine type clinopyroxene and biotite; olivine and flogopite may be present in some mafic rocks and alkali feldspar and quartz may be present in some felsic rocks. Sphene, magnetite and apatite are common accessory minerals. The silica content in the rocks varies between 37.08% and 54.4%, with constant values of MnO (0.1% 0.4%), impoverishment of Fe2O3, MgO, CaO, TiO2 and P2O5 as SiO2 increases, and enrichment of K2O, Na2O and Al2O3 as SiO2 increases. The basic and ultrabasic rocks fall in the subalkaline series, the rest of the samples fall in the medium to K-rich calc-alkaline series and in the shoshonitic series. The Gabro de Cerro Frontino corresponds to magmas impoverished on heavy rare earth elements with respect to light rare earth elements, which suggests the contribution of a subduction component in the magma genesis. The LILE (Sr, K, Rb, Pb, Ba) are enriched with respect to the HFSE values that are relatively flat and impoverished; the unit also exhibits a negative anomaly of Nb with respect to Th and Ce, being a magmatic arc the environment of generation. The ages obtained in biotite using the Ar-Ar method fall between 9.87±0.18 Ma and 11.44±0.36 Ma, Middle to upper Miocene (Tortonian-Serravallian), similar to age of other plutons that are part of the Botón Arc.
publishDate 2015
dc.date.issued.spa.fl_str_mv 2015-07-01
dc.date.accessioned.spa.fl_str_mv 2019-07-02T20:46:29Z
dc.date.available.spa.fl_str_mv 2019-07-02T20:46:29Z
dc.type.spa.fl_str_mv Artículo de revista
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dc.identifier.issn.spa.fl_str_mv ISSN: 2357-3740
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identifier_str_mv ISSN: 2357-3740
url https://repositorio.unal.edu.co/handle/unal/61855
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language spa
dc.relation.spa.fl_str_mv https://revistas.unal.edu.co/index.php/rbct/article/view/46053
dc.relation.ispartof.spa.fl_str_mv Universidad Nacional de Colombia Revistas electrónicas UN Boletín Ciencias de la Tierra
Boletín Ciencias de la Tierra
dc.relation.references.spa.fl_str_mv Rodríguez-García, Gabriel and Bermúdez-Cordero, Jose Gilberto (2015) Petrography, geochemistry and age of Cerro Frontino Gabro. Boletín de Ciencias de la Tierra (38). pp. 25-40. ISSN 2357-3740
dc.rights.spa.fl_str_mv Derechos reservados - Universidad Nacional de Colombia
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dc.rights.license.spa.fl_str_mv Atribución-NoComercial 4.0 Internacional
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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 - Sede Medellín - Facultad de Minas
institution Universidad Nacional de Colombia
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