Paleomagnetic reconnaissance of the grupo diábasico western andes (colombia)

A paleomagnetic reconnaissance has been carried out on the Grupo Diabásico of the western Cordillera from the Colombian Andes, between El Tambo and El Penol, Departamento Nariño. The Grupo Diabásico wich is of Cretaceous age is thought to be of submarine origin and to have undergone a low grade meta...

Full description

Autores:: Espinosa, A.
Hedley, I.
Wagner, J. J.

Tipo de recurso:: Article of journal

Fecha de publicación:: 1986

Institución:: Universidad Nacional de Colombia

Repositorio:: Universidad Nacional de Colombia

Idioma:: spa

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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_abf2Espinosa, A.6c8550e3-ea8d-46c7-8b3c-856bc7579536300Hedley, I.40de94c9-e1bb-4b7b-bfb0-fbcb8fe31215300Wagner, J. J.f74406af-4ff7-4d6b-8c45-a8afb3d187ea3002019-06-28T09:57:08Z2019-06-28T09:57:08Z1986https://repositorio.unal.edu.co/handle/unal/41326http://bdigital.unal.edu.co/31423/A paleomagnetic reconnaissance has been carried out on the Grupo Diabásico of the western Cordillera from the Colombian Andes, between El Tambo and El Penol, Departamento Nariño. The Grupo Diabásico wich is of Cretaceous age is thought to be of submarine origin and to have undergone a low grade metamorphism. The geometric mean of the natural remanent magnetization JNRM = 8.8 x 10-5 G. The low field magnetic susceptibility geometric mean X= 8.87 x 10-4G/Oe gives a Koenigsberger ratio of 0.28 indicating that the dominant magnetization is a induced one.Some pilot samples have been progressively demagnetized by alternating fields up to 600 O°. A viscous remanence test was applied to reject unstable sample. Despite the non ideal quality of the remanent magnetization a virtual geomagnetic pole has been calculated: pole latitude: 65° S; pole longitude: 186° E.A paleomagnetic reconnaissance has been carried out on the Grupo Diabásico of the western Cordillera from the Colombian Andes, between El Tambo and El Penol, Departamento Nariño. The Grupo Diabásico wich is of Cretaceous age is thought to be of submarine origin and to have undergone a low grade metamorphism. The geometric mean of the natural remanent magnetization JNRM = 8.8 x 10-5 G. The low field magnetic susceptibility geometric mean X= 8.87 x 10-4G/Oe gives a Koenigsberger ratio of 0.28 indicating that the dominant magnetization is a induced one.Some pilot samples have been progressively demagnetized by alternating fields up to 600 O°. A viscous remanence test was applied to reject unstable sample. Despite the non ideal quality of the remanent magnetization a virtual geomagnetic pole has been calculated: pole latitude: 65° S; pole longitude: 186° E.application/pdfspaDepartamento de Geocienciashttp://revistas.unal.edu.co/index.php/geocol/article/view/30593Universidad Nacional de Colombia Revistas electrónicas UN Geología ColombianaGeología ColombianaGeología Colombiana - An International Journal on Geosciences; Vol. 15 (1986); 149-153 Geología Colombiana; Vol. 15 (1986); 149-153 2357-3767 0072-0992Espinosa, A. and Hedley, I. and Wagner, J. J. (1986) Paleomagnetic reconnaissance of the grupo diábasico western andes (colombia). Geología Colombiana - An International Journal on Geosciences; Vol. 15 (1986); 149-153 Geología Colombiana; Vol. 15 (1986); 149-153 2357-3767 0072-0992 .Paleomagnetic reconnaissance of the grupo diábasico western andes (colombia)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/ARTGeologyEarth SciencesPaleomagnetic reconnaissanceGrupo DiabásicoCretaceousKoenigsberger ratioGeologíaCiencias de la tierraGeocienciasPaleomagnetic reconnaissanceGrupo DiabásicoCretaceousKoenigsberger ratioORIGINAL30593-110752-1-PB.pdfapplication/pdf2108636https://repositorio.unal.edu.co/bitstream/unal/41326/1/30593-110752-1-PB.pdf0e24d2af1e58ef592cabf2e3b091692eMD51THUMBNAIL30593-110752-1-PB.pdf.jpg30593-110752-1-PB.pdf.jpgGenerated Thumbnailimage/jpeg4015https://repositorio.unal.edu.co/bitstream/unal/41326/2/30593-110752-1-PB.pdf.jpg87c796f58a67211bd9bf5d7ce39ed4d8MD52unal/41326oai:repositorio.unal.edu.co:unal/413262024-01-29 23:07:09.571Repositorio Institucional Universidad Nacional de Colombiarepositorio_nal@unal.edu.co
dc.title.spa.fl_str_mv	Paleomagnetic reconnaissance of the grupo diábasico western andes (colombia)
title	Paleomagnetic reconnaissance of the grupo diábasico western andes (colombia)
spellingShingle	Paleomagnetic reconnaissance of the grupo diábasico western andes (colombia) Geology Earth Sciences Paleomagnetic reconnaissance Grupo Diabásico Cretaceous Koenigsberger ratio Geología Ciencias de la tierra Geociencias Paleomagnetic reconnaissance Grupo Diabásico Cretaceous Koenigsberger ratio
title_short	Paleomagnetic reconnaissance of the grupo diábasico western andes (colombia)
title_full	Paleomagnetic reconnaissance of the grupo diábasico western andes (colombia)
title_fullStr	Paleomagnetic reconnaissance of the grupo diábasico western andes (colombia)
title_full_unstemmed	Paleomagnetic reconnaissance of the grupo diábasico western andes (colombia)
title_sort	Paleomagnetic reconnaissance of the grupo diábasico western andes (colombia)
dc.creator.fl_str_mv	Espinosa, A. Hedley, I. Wagner, J. J.
dc.contributor.author.spa.fl_str_mv	Espinosa, A. Hedley, I. Wagner, J. J.
dc.subject.proposal.spa.fl_str_mv	Geology Earth Sciences Paleomagnetic reconnaissance Grupo Diabásico Cretaceous Koenigsberger ratio Geología Ciencias de la tierra Geociencias Paleomagnetic reconnaissance Grupo Diabásico Cretaceous Koenigsberger ratio
topic	Geology Earth Sciences Paleomagnetic reconnaissance Grupo Diabásico Cretaceous Koenigsberger ratio Geología Ciencias de la tierra Geociencias Paleomagnetic reconnaissance Grupo Diabásico Cretaceous Koenigsberger ratio
description	A paleomagnetic reconnaissance has been carried out on the Grupo Diabásico of the western Cordillera from the Colombian Andes, between El Tambo and El Penol, Departamento Nariño. The Grupo Diabásico wich is of Cretaceous age is thought to be of submarine origin and to have undergone a low grade metamorphism. The geometric mean of the natural remanent magnetization JNRM = 8.8 x 10-5 G. The low field magnetic susceptibility geometric mean X= 8.87 x 10-4G/Oe gives a Koenigsberger ratio of 0.28 indicating that the dominant magnetization is a induced one.Some pilot samples have been progressively demagnetized by alternating fields up to 600 O°. A viscous remanence test was applied to reject unstable sample. Despite the non ideal quality of the remanent magnetization a virtual geomagnetic pole has been calculated: pole latitude: 65° S; pole longitude: 186° E.
publishDate	1986
dc.date.issued.spa.fl_str_mv	1986
dc.date.accessioned.spa.fl_str_mv	2019-06-28T09:57:08Z
dc.date.available.spa.fl_str_mv	2019-06-28T09:57:08Z
dc.type.spa.fl_str_mv	Artículo de revista
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url	https://repositorio.unal.edu.co/handle/unal/41326 http://bdigital.unal.edu.co/31423/
dc.language.iso.spa.fl_str_mv	spa
language	spa
dc.relation.spa.fl_str_mv	http://revistas.unal.edu.co/index.php/geocol/article/view/30593
dc.relation.ispartof.spa.fl_str_mv	Universidad Nacional de Colombia Revistas electrónicas UN Geología Colombiana Geología Colombiana
dc.relation.ispartofseries.none.fl_str_mv	Geología Colombiana - An International Journal on Geosciences; Vol. 15 (1986); 149-153 Geología Colombiana; Vol. 15 (1986); 149-153 2357-3767 0072-0992
dc.relation.references.spa.fl_str_mv	Espinosa, A. and Hedley, I. and Wagner, J. J. (1986) Paleomagnetic reconnaissance of the grupo diábasico western andes (colombia). Geología Colombiana - An International Journal on Geosciences; Vol. 15 (1986); 149-153 Geología Colombiana; Vol. 15 (1986); 149-153 2357-3767 0072-0992 .
dc.rights.spa.fl_str_mv	Derechos reservados - Universidad Nacional de Colombia
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dc.publisher.spa.fl_str_mv	Departamento de Geociencias
institution	Universidad Nacional de Colombia
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Paleomagnetic reconnaissance of the grupo diábasico western andes (colombia)

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