Documenting Translation and Vertical-Axis Rotations using Paleomagnetic Techniques along the Panama Isthmus: Preliminary Results

Along the Isthmus of Panama 23 paleomagnetic sites were sampled in order to determine preliminary block rotations and paleolatitudinal movements. The lithology selected for this research corresponds to volcanic and sedimentary rocks with ages ranging from Upper Cretaceous to Pleistocene. Countercloc...

Descripción completa

Detalles Bibliográficos
Autores principales:	Silva, César, Bayona, Germán, Osorio, Abraham, Montes, Camilo, Jaramillo, Carlos, Santamaría, Luis
Formato:	Online
Idioma:	spa
Publicado:	Universidad Tecnológica de Panamá, Panamá 2012
Acceso en línea:	https://revistas.utp.ac.pa/index.php/id-tecnologico/article/view/98

id	IDTEC98
record_format	ojs
spelling	IDTEC982019-04-26T15:07:33Z Documenting Translation and Vertical-Axis Rotations using Paleomagnetic Techniques along the Panama Isthmus: Preliminary Results Silva, César Bayona, Germán Osorio, Abraham Montes, Camilo Jaramillo, Carlos Santamaría, Luis Along the Isthmus of Panama 23 paleomagnetic sites were sampled in order to determine preliminary block rotations and paleolatitudinal movements. The lithology selected for this research corresponds to volcanic and sedimentary rocks with ages ranging from Upper Cretaceous to Pleistocene. Counterclockwise vertical axis rotations were uncovered in Paleocene and Oligocene units separated by a sinistral fault. Mean directions of two sites collected in Cenozoic rocks to the north of the fault are westerly (D 275.4, I -20.8, k 20.46, a95 10.9; D 264.6, I 5.3, k 292.35, a95 3.5), whereas the mean direction uncovered in one site collected in Oligocene rocks to the south of the fault yields a northward declination and positive inclination (D 346.3, I 14.3, k 18.43, a95 14.4). Vertical axis rotation of 81.7º ± 13.3º, of the Paleocene rocks with respect to the Oligocene rock. Cenozoic sites record the northward path of the trailing edge of the Caribbean plate, from 10.8ºS for Paleocene to 6.6ºN for Oligocene. However, more sites are needed to be collected in order to better constraint this northward translation. Components isolated in El Valle volcano and Canal areas using Middle Miocene to Pleistocene rocks, indicate normal and reverse directions similar to the current direction of the Earth magnetic field. Therefore, no major latitudinal displacement of the Panama Isthmus has occurred during the Neogene. Northward migration of the Panama arc is consistent with the Pacific origin of the Caribbean plate and counter-clockwise vertical axis rotation of several blocks in Panama could be related with the South American Plate collision since Pliocene. Universidad Tecnológica de Panamá, Panamá 2012-06-29 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf text/html https://revistas.utp.ac.pa/index.php/id-tecnologico/article/view/98 I+D Tecnológico; Vol. 8 Núm. 1 (2012): Revista I+D Tecnológico; 43-48 2219-6714 1680-8894 spa https://revistas.utp.ac.pa/index.php/id-tecnologico/article/view/98/pdf https://revistas.utp.ac.pa/index.php/id-tecnologico/article/view/98/html Derechos de autor 2016 César Silva, Germán Bayona, Camilo Montes, Carlos Jaramillo, Luis Santamaría
institution	Universidad Tecnológica de Panamá
collection	I+D Tecnológico
language	spa
format	Online
author	Silva, César Bayona, Germán Osorio, Abraham Montes, Camilo Jaramillo, Carlos Santamaría, Luis
spellingShingle	Silva, César Bayona, Germán Osorio, Abraham Montes, Camilo Jaramillo, Carlos Santamaría, Luis Documenting Translation and Vertical-Axis Rotations using Paleomagnetic Techniques along the Panama Isthmus: Preliminary Results
author_facet	Silva, César Bayona, Germán Osorio, Abraham Montes, Camilo Jaramillo, Carlos Santamaría, Luis
author_sort	Silva, César
description	Along the Isthmus of Panama 23 paleomagnetic sites were sampled in order to determine preliminary block rotations and paleolatitudinal movements. The lithology selected for this research corresponds to volcanic and sedimentary rocks with ages ranging from Upper Cretaceous to Pleistocene. Counterclockwise vertical axis rotations were uncovered in Paleocene and Oligocene units separated by a sinistral fault. Mean directions of two sites collected in Cenozoic rocks to the north of the fault are westerly (D 275.4, I -20.8, k 20.46, a95 10.9; D 264.6, I 5.3, k 292.35, a95 3.5), whereas the mean direction uncovered in one site collected in Oligocene rocks to the south of the fault yields a northward declination and positive inclination (D 346.3, I 14.3, k 18.43, a95 14.4). Vertical axis rotation of 81.7º ± 13.3º, of the Paleocene rocks with respect to the Oligocene rock. Cenozoic sites record the northward path of the trailing edge of the Caribbean plate, from 10.8ºS for Paleocene to 6.6ºN for Oligocene. However, more sites are needed to be collected in order to better constraint this northward translation. Components isolated in El Valle volcano and Canal areas using Middle Miocene to Pleistocene rocks, indicate normal and reverse directions similar to the current direction of the Earth magnetic field. Therefore, no major latitudinal displacement of the Panama Isthmus has occurred during the Neogene. Northward migration of the Panama arc is consistent with the Pacific origin of the Caribbean plate and counter-clockwise vertical axis rotation of several blocks in Panama could be related with the South American Plate collision since Pliocene.
title	Documenting Translation and Vertical-Axis Rotations using Paleomagnetic Techniques along the Panama Isthmus: Preliminary Results
title_short	Documenting Translation and Vertical-Axis Rotations using Paleomagnetic Techniques along the Panama Isthmus: Preliminary Results
title_full	Documenting Translation and Vertical-Axis Rotations using Paleomagnetic Techniques along the Panama Isthmus: Preliminary Results
title_fullStr	Documenting Translation and Vertical-Axis Rotations using Paleomagnetic Techniques along the Panama Isthmus: Preliminary Results
title_full_unstemmed	Documenting Translation and Vertical-Axis Rotations using Paleomagnetic Techniques along the Panama Isthmus: Preliminary Results
title_sort	documenting translation and vertical-axis rotations using paleomagnetic techniques along the panama isthmus: preliminary results
publisher	Universidad Tecnológica de Panamá, Panamá
publishDate	2012
url	https://revistas.utp.ac.pa/index.php/id-tecnologico/article/view/98
work_keys_str_mv	AT silvacesar documentingtranslationandverticalaxisrotationsusingpaleomagnetictechniquesalongthepanamaisthmuspreliminaryresults AT bayonagerman documentingtranslationandverticalaxisrotationsusingpaleomagnetictechniquesalongthepanamaisthmuspreliminaryresults AT osorioabraham documentingtranslationandverticalaxisrotationsusingpaleomagnetictechniquesalongthepanamaisthmuspreliminaryresults AT montescamilo documentingtranslationandverticalaxisrotationsusingpaleomagnetictechniquesalongthepanamaisthmuspreliminaryresults AT jaramillocarlos documentingtranslationandverticalaxisrotationsusingpaleomagnetictechniquesalongthepanamaisthmuspreliminaryresults AT santamarialuis documentingtranslationandverticalaxisrotationsusingpaleomagnetictechniquesalongthepanamaisthmuspreliminaryresults
_version_	1811817957556224000

Documenting Translation and Vertical-Axis Rotations using Paleomagnetic Techniques along the Panama Isthmus: Preliminary Results

Ejemplares similares