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Constraints on the magnitude of strike-slip displacement along the Fagnano Transform System, Tierra del Fuego, Argentina

dc.contributoren-US
dc.contributores-ES
dc.creatorTorres-Carbonell, Pablo J.
dc.creatorOlivero, Eduardo B.
dc.creatorDimieri, Luis V.
dc.date2010-06-21
dc.date.accessioned2019-05-17T13:05:17Z
dc.date.available2019-05-17T13:05:17Z
dc.identifierhttp://www.andeangeology.cl/index.php/revista1/article/view/V35n1-a03
dc.identifier10.5027/andgeoV35n1-a03
dc.identifier.urihttps://revistaschilenas.uchile.cl/handle/2250/95629
dc.descriptionNuevos datos de campo, especialmente el hallazgo del contacto entre el Cretacico Superior-Paleoceno en un area previamente desconocida en el sector suroriental de la Isla Grande de Tierra del Fuego, permiten controlar con gran precision el desplazamiento de rumbo del Sistema Transformante Fagnano (STF). El citado contacto estratigrafico se encuentra al norte y sur del STF, y esta deformado por una estructura compresiva regional NO-SE que forma parte de la faja corrida y plegada Fueguina, llamada aqui Corrimiento Cerro Piramide-Cerro Malvinera (CPM). Esta estructura ha sido desplazada por el STF, por lo tanto el mapeo preciso de la misma y del contacto Cretacico Superior-Paleoceno posibilita definir el rechazo horizontal del sistema transformante en la Isla Grande de Tierra del Fuego, obteniendose un valor de ca. 48 km para el mismo. El valor obtenido, sumado a los datos existentes en la bibliografia sobre velocidad de desplazamiento a lo largo del STF en Tierra del Fuego, permite estimar en ~7 Ma la edad maxima de inicio de la transcurrencia en este sector. Dicha edad (Mioceno tardio) coincide con el nacimiento del limite constructivo entre las placas Sandwich y Scotia, que a su vez ha sido postulado como responsable del comienzo de la actividad transformante entre las placas Sudamericana y ScotiaABSTRACT:Newfield data, specially the discovery of the contact between Upper Cretaceous-Paleocene rock units in a previously unexplored area in southeast Tierra del Fuego, allowed us to estimate the amount of strike-slip displacement accommodated by the Fagnano Transform System (FTS). This stratigraphic contact is exposed both to the north and south of the FTS and it is deformed by aNW-SE compressive regional structure that forms part of the Fuegian thrust-fold belt, called the Cerro Piramide-Cerro Malvinera Thrust (PMT). The compressive structure is laterally offset by the FTS. The precise mapping of the PMT and the Upper Cretaceous-Paleocene contact shows a horizontal offset of ca. 48 km along the transform system in the Isla Grande de Tierra del Fuego. A maximum age of ~7 Ma for the beginning of the strike-slip in this sector is estimated by combining the obtained offset with published data on the slip-rate along the FTS in Tierra del Fuego. This Late Miocene age coincides with the creation of the divergent plate boundary between Sandwich and Scotia Plates, which has been proposed as responsible for the beginning of the strike-slip activity between South America and Scotia Plates.es-ES
dc.descriptionNew field data, specially the discovery of the contact between Upper Cretaceous-Paleocene rock units in a previously unexplored area in southeast Tierra del Fuego, allowed us to estimate the amount of strike-slip displacement accommodated by the Fagnano Transform System (FTS). This stratigraphic contact is exposed both to the north and south of the FTS and it is deformed by aNW-SE compressive regional structure that forms part of the Fuegian thrust-fold belt, called the Cerro Pirámide-Cerro Malvinera Thrust (PMT). The compressive structure is laterally offset by the FTS. The precise mapping of the PMT and the Upper Cretaceous-Paleocene contact shows a horizontal offset of ca. 48 km along the transform system in the Isla Grande de Tierra del Fuego. A maximum age of ~7 Ma for the beginning of the strike-slip in this sector is estimated by combining the obtained offset with published data on the slip-rate along the FTS in Tierra del Fuego. This Late Miocene age coincides with the creation of the divergent plate boundary between Sandwich and Scotia Plates, which has been proposed as responsible for the beginning of the strike-slip activity between South America and Scotia Plates.en-US
dc.formatapplication/pdf
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dc.languagespa
dc.publisherServicio Nacional de Geología y Mineríaen-US
dc.relationhttp://www.andeangeology.cl/index.php/revista1/article/view/V35n1-a03/403
dc.relationhttp://www.andeangeology.cl/index.php/revista1/article/view/V35n1-a03/html
dc.sourceAndean Geology; Vol 35, No 1 (2008)es-ES
dc.sourceAndean Geology; Vol 35, No 1 (2008)en-US
dc.source0718-7106
dc.source0718-7092
dc.titleControl en la magnitud de desplazamiento de rumbo del Sistema Transformante Fagnano, Tierra del Fuego, ArgentinaConstraints on the magnitude of strike-slip displacement along the Fagnano Transform System, Tierra del Fuego, Argentina.es-ES
dc.titleConstraints on the magnitude of strike-slip displacement along the Fagnano Transform System, Tierra del Fuego, Argentinaen-US
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion
dc.typees-ES
dc.typeen-US


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