Episodios de reactivación del sistema de fallas del Romeral en la parte Nor-Occidental de los Andes Centrales de Colombia a través de resultados 39AR-40AR y K-AR.

Direct dating of reactivation of the San Jerónimo Fault (SJF), easternmost limit of the Romeral fault system (RFS), is presented through 39Ar-40Ar and K-Ar results in neo-formed micas and mylonitic bands of strongly hidrothermalized gabbros. Published cooling and crystallization ages from sin-tecton...

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Autores:
Vinasco Vallejo, Cesar
Cordani, Umberto
Tipo de recurso:
Article of journal
Fecha de publicación:
2012
Institución:
Universidad Nacional de Colombia
Repositorio:
Universidad Nacional de Colombia
Idioma:
spa
OAI Identifier:
oai:repositorio.unal.edu.co:unal/12045
Acceso en línea:
https://repositorio.unal.edu.co/handle/unal/12045
http://bdigital.unal.edu.co/9652/
Palabra clave:
55 Ciencias de la tierra / Earth sciences and geology
Falla Romeral
Cordillera Centra de los Andes (Colombia)
Rights
openAccess
License
Atribución-NoComercial 4.0 Internacional
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network_name_str Universidad Nacional de Colombia
repository_id_str
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_abf2Vinasco Vallejo, Cesareda79740-c062-4b63-94da-0d1d16864de5300Cordani, Umberto18bb8a56-ce5b-44d5-a6b4-604f4e1984613002019-06-25T00:35:49Z2019-06-25T00:35:49Z2012-12ISSN: 0120-3630https://repositorio.unal.edu.co/handle/unal/12045http://bdigital.unal.edu.co/9652/Direct dating of reactivation of the San Jerónimo Fault (SJF), easternmost limit of the Romeral fault system (RFS), is presented through 39Ar-40Ar and K-Ar results in neo-formed micas and mylonitic bands of strongly hidrothermalized gabbros. Published cooling and crystallization ages from sin-tectonic magmatic rocks exposed in the western fl ank of the Central Cordillera have suggest that tectonic evolution of the paleo-fault system began since Triassic and Lower Jurassic before the installation of Central Cordillera in its present position relative to the South American margin (SOAM). The Sabaletas greenchists (Arquía complex) yields 39Ar-40Ar plateau age of 127±5 Ma and integrated ages between 102-115 Ma eventually recording the initial accommodation of the Albian-Aptian volcanosedimentary sequence of the Quebradagrande Complex to the continental margin. Direct dating of fault reactivation of SJF through 39Ar-40Ar analysis in neo-formed micas in mylonitic bands and K-Ar ages in a hidrothermalized gabbro belonging to the Quebradagrande volcanic rocks shows plateau ages ranging from 87-90 Ma in biotite and 72-81 Ma in sericite, whereas K-Ar whole rock ages in samples collected in the area of infl uence of the SJF range between 91-102 Ma. The predominance of Upper Cretaceous ages suggest that activity of the fault system rich the major and most important peak during this time spam. This age interval is most likely related to the oblique arrival and collision of the Caribbean-Colombian Oceanic Plateau (CCOP) episodically during the upper cretaceous. Final deformational episodes in the Central Cordillera and RFS are related to the collision of the Panamá-Chocó block in Early Mioceneearly Pliocene, and are recorded by 39Ar-40Ar and K-Ar ages in Mio-Pliocene intrusives along the Cauca depression.application/pdfspaUniversidad Nacional de Colombia Sede Medellín. Facultad de Minas. Escuela de Geociencias y Medio AmbienteUniversidad Nacional de Colombia Sede Medellín Facultad de Minas Escuela de Geociencias y Medio AmbienteEscuela de Geociencias y Medio AmbienteVinasco Vallejo, Cesar and Cordani, Umberto (2012) Episodios de reactivación del sistema de fallas del Romeral en la parte Nor-Occidental de los Andes Centrales de Colombia a través de resultados 39AR-40AR y K-AR. Boletín de Ciencias de la Tierra (32). pp. 111-124. ISSN 0120-363055 Ciencias de la tierra / Earth sciences and geologyFalla RomeralCordillera Centra de los Andes (Colombia)Episodios de reactivación del sistema de fallas del Romeral en la parte Nor-Occidental de los Andes Centrales de Colombia a través de resultados 39AR-40AR y K-AR.Artículo 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/ARTORIGINALBolt. Cien. Tierra No. 32-111.pdfapplication/pdf728159https://repositorio.unal.edu.co/bitstream/unal/12045/1/Bolt.%20Cien.%20Tierra%20No.%2032-111.pdf6729a77f23e14f1f1d895402a3e3775bMD51THUMBNAILBolt. Cien. Tierra No. 32-111.pdf.jpgBolt. Cien. Tierra No. 32-111.pdf.jpgGenerated Thumbnailimage/jpeg9443https://repositorio.unal.edu.co/bitstream/unal/12045/2/Bolt.%20Cien.%20Tierra%20No.%2032-111.pdf.jpga15486c8605f873823ce5a1a9af00643MD52unal/12045oai:repositorio.unal.edu.co:unal/120452022-09-29 23:05:28.157Repositorio Institucional Universidad Nacional de Colombiarepositorio_nal@unal.edu.co
dc.title.spa.fl_str_mv Episodios de reactivación del sistema de fallas del Romeral en la parte Nor-Occidental de los Andes Centrales de Colombia a través de resultados 39AR-40AR y K-AR.
title Episodios de reactivación del sistema de fallas del Romeral en la parte Nor-Occidental de los Andes Centrales de Colombia a través de resultados 39AR-40AR y K-AR.
spellingShingle Episodios de reactivación del sistema de fallas del Romeral en la parte Nor-Occidental de los Andes Centrales de Colombia a través de resultados 39AR-40AR y K-AR.
55 Ciencias de la tierra / Earth sciences and geology
Falla Romeral
Cordillera Centra de los Andes (Colombia)
title_short Episodios de reactivación del sistema de fallas del Romeral en la parte Nor-Occidental de los Andes Centrales de Colombia a través de resultados 39AR-40AR y K-AR.
title_full Episodios de reactivación del sistema de fallas del Romeral en la parte Nor-Occidental de los Andes Centrales de Colombia a través de resultados 39AR-40AR y K-AR.
title_fullStr Episodios de reactivación del sistema de fallas del Romeral en la parte Nor-Occidental de los Andes Centrales de Colombia a través de resultados 39AR-40AR y K-AR.
title_full_unstemmed Episodios de reactivación del sistema de fallas del Romeral en la parte Nor-Occidental de los Andes Centrales de Colombia a través de resultados 39AR-40AR y K-AR.
title_sort Episodios de reactivación del sistema de fallas del Romeral en la parte Nor-Occidental de los Andes Centrales de Colombia a través de resultados 39AR-40AR y K-AR.
dc.creator.fl_str_mv Vinasco Vallejo, Cesar
Cordani, Umberto
dc.contributor.author.spa.fl_str_mv Vinasco Vallejo, Cesar
Cordani, Umberto
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
Falla Romeral
Cordillera Centra de los Andes (Colombia)
dc.subject.proposal.spa.fl_str_mv Falla Romeral
Cordillera Centra de los Andes (Colombia)
description Direct dating of reactivation of the San Jerónimo Fault (SJF), easternmost limit of the Romeral fault system (RFS), is presented through 39Ar-40Ar and K-Ar results in neo-formed micas and mylonitic bands of strongly hidrothermalized gabbros. Published cooling and crystallization ages from sin-tectonic magmatic rocks exposed in the western fl ank of the Central Cordillera have suggest that tectonic evolution of the paleo-fault system began since Triassic and Lower Jurassic before the installation of Central Cordillera in its present position relative to the South American margin (SOAM). The Sabaletas greenchists (Arquía complex) yields 39Ar-40Ar plateau age of 127±5 Ma and integrated ages between 102-115 Ma eventually recording the initial accommodation of the Albian-Aptian volcanosedimentary sequence of the Quebradagrande Complex to the continental margin. Direct dating of fault reactivation of SJF through 39Ar-40Ar analysis in neo-formed micas in mylonitic bands and K-Ar ages in a hidrothermalized gabbro belonging to the Quebradagrande volcanic rocks shows plateau ages ranging from 87-90 Ma in biotite and 72-81 Ma in sericite, whereas K-Ar whole rock ages in samples collected in the area of infl uence of the SJF range between 91-102 Ma. The predominance of Upper Cretaceous ages suggest that activity of the fault system rich the major and most important peak during this time spam. This age interval is most likely related to the oblique arrival and collision of the Caribbean-Colombian Oceanic Plateau (CCOP) episodically during the upper cretaceous. Final deformational episodes in the Central Cordillera and RFS are related to the collision of the Panamá-Chocó block in Early Mioceneearly Pliocene, and are recorded by 39Ar-40Ar and K-Ar ages in Mio-Pliocene intrusives along the Cauca depression.
publishDate 2012
dc.date.issued.spa.fl_str_mv 2012-12
dc.date.accessioned.spa.fl_str_mv 2019-06-25T00:35:49Z
dc.date.available.spa.fl_str_mv 2019-06-25T00:35:49Z
dc.type.spa.fl_str_mv Artículo de revista
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dc.type.content.spa.fl_str_mv Text
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format http://purl.org/coar/resource_type/c_6501
status_str publishedVersion
dc.identifier.issn.spa.fl_str_mv ISSN: 0120-3630
dc.identifier.uri.none.fl_str_mv https://repositorio.unal.edu.co/handle/unal/12045
dc.identifier.eprints.spa.fl_str_mv http://bdigital.unal.edu.co/9652/
identifier_str_mv ISSN: 0120-3630
url https://repositorio.unal.edu.co/handle/unal/12045
http://bdigital.unal.edu.co/9652/
dc.language.iso.spa.fl_str_mv spa
language spa
dc.relation.ispartof.spa.fl_str_mv Universidad Nacional de Colombia Sede Medellín Facultad de Minas Escuela de Geociencias y Medio Ambiente
Escuela de Geociencias y Medio Ambiente
dc.relation.references.spa.fl_str_mv Vinasco Vallejo, Cesar and Cordani, Umberto (2012) Episodios de reactivación del sistema de fallas del Romeral en la parte Nor-Occidental de los Andes Centrales de Colombia a través de resultados 39AR-40AR y K-AR. Boletín de Ciencias de la Tierra (32). pp. 111-124. ISSN 0120-3630
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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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institution Universidad Nacional de Colombia
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