A geological and geophysical crustal section across the Magallanes–Fagnano fault in Tierra del Fuego
- Autores
- Tassone, Alejandro; Lippai, Horacio Francisco; Lodolo, Emanuele; Menichetti, Marco; Comba, A.; Hormaechea, José Luis; Vilas, Juan Francisco
- Año de publicación
- 2005
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Geophysical and geological field surveys carried out in the central and eastern part of the Argentinean Tierra del Fuego Island on the Magallanes–Fagnano fault system (MFS) delineate its main structural features and tectonic setting. Gravity and magnetic data provide critical information for those areas lacking good exposures and support a present-day transtensional tectonic regime for the MFS. In the surveyed area, the MFS segments have a clear morphological expression and are associated with localized gravity minima interpreted as pullapart basins. In the southeastern corner of Lago Fagnano, the magnetic data suggest a prominent crystalline body in the subsurface, partially exposed in Cerro Hewhoepen. The shape and position of this intrusive body suggest that its emplacement was localized in a releasing bend. Two-dimensional density modeling along a 40 km long N–S section east of Lago Fagnano suggests a deep duplex similar to that exposed in the western part of the island. The obtained model, combined with available surface data, implies the subsurface configuration of geological units and structures, in which the structure of the deep duplex is similar to that exposed in the western part of the Island. The model indicates the southward deepening of the basement from 5 to 7 km and provides further support for the piston shape of the Hewhoepen intrusive.
Facultad de Ciencias Astronómicas y Geofísicas - Materia
-
Geofísica
Geología
Gravity
Magnetic
Tierra del Fuego
Transtensive tectonics - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/159476
Ver los metadatos del registro completo
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A geological and geophysical crustal section across the Magallanes–Fagnano fault in Tierra del FuegoTassone, AlejandroLippai, Horacio FranciscoLodolo, EmanueleMenichetti, MarcoComba, A.Hormaechea, José LuisVilas, Juan FranciscoGeofísicaGeologíaGravityMagneticTierra del FuegoTranstensive tectonicsGeophysical and geological field surveys carried out in the central and eastern part of the Argentinean Tierra del Fuego Island on the Magallanes–Fagnano fault system (MFS) delineate its main structural features and tectonic setting. Gravity and magnetic data provide critical information for those areas lacking good exposures and support a present-day transtensional tectonic regime for the MFS. In the surveyed area, the MFS segments have a clear morphological expression and are associated with localized gravity minima interpreted as pullapart basins. In the southeastern corner of Lago Fagnano, the magnetic data suggest a prominent crystalline body in the subsurface, partially exposed in Cerro Hewhoepen. The shape and position of this intrusive body suggest that its emplacement was localized in a releasing bend. Two-dimensional density modeling along a 40 km long N–S section east of Lago Fagnano suggests a deep duplex similar to that exposed in the western part of the island. The obtained model, combined with available surface data, implies the subsurface configuration of geological units and structures, in which the structure of the deep duplex is similar to that exposed in the western part of the Island. The model indicates the southward deepening of the basement from 5 to 7 km and provides further support for the piston shape of the Hewhoepen intrusive.Facultad de Ciencias Astronómicas y Geofísicas2005info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf99-109http://sedici.unlp.edu.ar/handle/10915/159476enginfo:eu-repo/semantics/altIdentifier/issn/1873-0647info:eu-repo/semantics/altIdentifier/issn/0895-9811info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2004.12.003info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:41:41Zoai:sedici.unlp.edu.ar:10915/159476Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:41:41.536SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
A geological and geophysical crustal section across the Magallanes–Fagnano fault in Tierra del Fuego |
title |
A geological and geophysical crustal section across the Magallanes–Fagnano fault in Tierra del Fuego |
spellingShingle |
A geological and geophysical crustal section across the Magallanes–Fagnano fault in Tierra del Fuego Tassone, Alejandro Geofísica Geología Gravity Magnetic Tierra del Fuego Transtensive tectonics |
title_short |
A geological and geophysical crustal section across the Magallanes–Fagnano fault in Tierra del Fuego |
title_full |
A geological and geophysical crustal section across the Magallanes–Fagnano fault in Tierra del Fuego |
title_fullStr |
A geological and geophysical crustal section across the Magallanes–Fagnano fault in Tierra del Fuego |
title_full_unstemmed |
A geological and geophysical crustal section across the Magallanes–Fagnano fault in Tierra del Fuego |
title_sort |
A geological and geophysical crustal section across the Magallanes–Fagnano fault in Tierra del Fuego |
dc.creator.none.fl_str_mv |
Tassone, Alejandro Lippai, Horacio Francisco Lodolo, Emanuele Menichetti, Marco Comba, A. Hormaechea, José Luis Vilas, Juan Francisco |
author |
Tassone, Alejandro |
author_facet |
Tassone, Alejandro Lippai, Horacio Francisco Lodolo, Emanuele Menichetti, Marco Comba, A. Hormaechea, José Luis Vilas, Juan Francisco |
author_role |
author |
author2 |
Lippai, Horacio Francisco Lodolo, Emanuele Menichetti, Marco Comba, A. Hormaechea, José Luis Vilas, Juan Francisco |
author2_role |
author author author author author author |
dc.subject.none.fl_str_mv |
Geofísica Geología Gravity Magnetic Tierra del Fuego Transtensive tectonics |
topic |
Geofísica Geología Gravity Magnetic Tierra del Fuego Transtensive tectonics |
dc.description.none.fl_txt_mv |
Geophysical and geological field surveys carried out in the central and eastern part of the Argentinean Tierra del Fuego Island on the Magallanes–Fagnano fault system (MFS) delineate its main structural features and tectonic setting. Gravity and magnetic data provide critical information for those areas lacking good exposures and support a present-day transtensional tectonic regime for the MFS. In the surveyed area, the MFS segments have a clear morphological expression and are associated with localized gravity minima interpreted as pullapart basins. In the southeastern corner of Lago Fagnano, the magnetic data suggest a prominent crystalline body in the subsurface, partially exposed in Cerro Hewhoepen. The shape and position of this intrusive body suggest that its emplacement was localized in a releasing bend. Two-dimensional density modeling along a 40 km long N–S section east of Lago Fagnano suggests a deep duplex similar to that exposed in the western part of the island. The obtained model, combined with available surface data, implies the subsurface configuration of geological units and structures, in which the structure of the deep duplex is similar to that exposed in the western part of the Island. The model indicates the southward deepening of the basement from 5 to 7 km and provides further support for the piston shape of the Hewhoepen intrusive. Facultad de Ciencias Astronómicas y Geofísicas |
description |
Geophysical and geological field surveys carried out in the central and eastern part of the Argentinean Tierra del Fuego Island on the Magallanes–Fagnano fault system (MFS) delineate its main structural features and tectonic setting. Gravity and magnetic data provide critical information for those areas lacking good exposures and support a present-day transtensional tectonic regime for the MFS. In the surveyed area, the MFS segments have a clear morphological expression and are associated with localized gravity minima interpreted as pullapart basins. In the southeastern corner of Lago Fagnano, the magnetic data suggest a prominent crystalline body in the subsurface, partially exposed in Cerro Hewhoepen. The shape and position of this intrusive body suggest that its emplacement was localized in a releasing bend. Two-dimensional density modeling along a 40 km long N–S section east of Lago Fagnano suggests a deep duplex similar to that exposed in the western part of the island. The obtained model, combined with available surface data, implies the subsurface configuration of geological units and structures, in which the structure of the deep duplex is similar to that exposed in the western part of the Island. The model indicates the southward deepening of the basement from 5 to 7 km and provides further support for the piston shape of the Hewhoepen intrusive. |
publishDate |
2005 |
dc.date.none.fl_str_mv |
2005 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://sedici.unlp.edu.ar/handle/10915/159476 |
url |
http://sedici.unlp.edu.ar/handle/10915/159476 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/issn/1873-0647 info:eu-repo/semantics/altIdentifier/issn/0895-9811 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2004.12.003 |
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openAccess |
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http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
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