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
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/159476

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network_name_str SEDICI (UNLP)
spelling 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
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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
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv 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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