A geological and geophysical crustal section across the Magallanes–Fagnano fault in Tierra del Fuego
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 a...
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| Formato: | Articulo |
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2005
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/159476 |
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I19-R120-10915-1594762023-10-27T20:31:05Z http://sedici.unlp.edu.ar/handle/10915/159476 A geological and geophysical crustal section across the Magallanes–Fagnano fault in Tierra del Fuego Tassone, Alejandro Lippai, Horacio Francisco Lodolo, Emanuele Menichetti, Marco Comba, A. Hormaechea, José Luis Vilas, Juan Francisco 2005 2023-10-27T14:03:28Z en Geofísica Geología Gravity Magnetic Tierra del Fuego Transtensive tectonics 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 Articulo Articulo http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf 99-109 |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Geofísica Geología Gravity Magnetic Tierra del Fuego Transtensive tectonics |
| spellingShingle |
Geofísica Geología Gravity Magnetic Tierra del Fuego Transtensive tectonics Tassone, Alejandro Lippai, Horacio Francisco Lodolo, Emanuele Menichetti, Marco Comba, A. Hormaechea, José Luis Vilas, Juan Francisco A geological and geophysical crustal section across the Magallanes–Fagnano fault in Tierra del Fuego |
| topic_facet |
Geofísica Geología Gravity Magnetic Tierra del Fuego Transtensive tectonics |
| 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. |
| format |
Articulo Articulo |
| author |
Tassone, Alejandro Lippai, Horacio Francisco Lodolo, Emanuele Menichetti, Marco Comba, A. Hormaechea, José Luis Vilas, Juan Francisco |
| author_facet |
Tassone, Alejandro Lippai, Horacio Francisco Lodolo, Emanuele Menichetti, Marco Comba, A. Hormaechea, José Luis Vilas, Juan Francisco |
| author_sort |
Tassone, Alejandro |
| title |
A geological and geophysical crustal section across the Magallanes–Fagnano fault in Tierra del Fuego |
| 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 |
geological and geophysical crustal section across the magallanes–fagnano fault in tierra del fuego |
| publishDate |
2005 |
| url |
http://sedici.unlp.edu.ar/handle/10915/159476 |
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1807221678592229376 |