Gravity map of the Isla Grande de Tierra del Fuego, and morphology of Lago Fagnano

Autores
Lodolo, Emanuele; Lippai, Horacio Francisco; Tassone, Alejandro Alberto; Zanolla, Marianela; Menichetti, Marco; Hormaechea, José Luis
Año de publicación
2007
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A complete Bouguer gravity map of the central-eastern part of the Isla Grande de Tierra del Fuego, and a general bathymetric chart of the Lago Fagnano have been realized, on the basis of a series of field geophysical surveys carried out on the Island since 1998. The regional gravity anomaly trend onshore shows a progressive negative gradient from N to S. Distinct, broadly E-W-trending gravity minima are superimposed on this regional negative gradient. They follow the main trace of the Magallanes-Fagnano fault system, which represents the western segment of the left-lateral South America-Scotia transform plate boundary. The gravity minima reflect the presence in the subsurface of restricted and elongated basins developed within the principal displacement zone of the fault system. A relative positive gravity maximum is located just at the SE corner of the Lago Fagnano, and represents the response of a partially exposed crystalline body, occupying an area 3 x 3 km wide. A 2D vertical crustal model has been constructed, combining gravity data inversion and geological information available for the central-eastern region of Lago Fagnano. The bathymetric map of the Lago Fagnano delineates the main morphological features of this 110-km-long, 7-km-wide lake, the largest of Isla Grande. The floor is divided into distinct parts, which suggests that the basin is composed of different sub-basins. In most areas, the basin floor is highly asymmetric in shape, with flat depocentral areas. The most pronounced asymmetry of the basin is seen in the eastern end of the lake, where there is also the deepest depression. The steeper slope of the basin, along the northern shore of the Lago Fagnano, also coincides with the most pronounced regional topographic gradient. The general gravimetric and morphological features of the investigated region are here discussed.
Fil: Lodolo, Emanuele. No especifíca;
Fil: Lippai, Horacio Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Instituto de Geofísica "Daniel Valencio"; Argentina
Fil: Tassone, Alejandro Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Instituto de Geofísica "Daniel Valencio"; Argentina
Fil: Zanolla, Marianela. No especifíca;
Fil: Menichetti, Marco. Università Degli Studi Di Urbino Carlo Bo; Italia
Fil: Hormaechea, José Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Materia
Tierra del Fuego
Bouguer
Lago Fagnano
Gravity model
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/156231
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/156231
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Gravity map of the Isla Grande de Tierra del Fuego, and morphology of Lago FagnanoLodolo, EmanueleLippai, Horacio FranciscoTassone, Alejandro AlbertoZanolla, MarianelaMenichetti, MarcoHormaechea, José LuisTierra del FuegoBouguerLago FagnanoGravity modelhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1A complete Bouguer gravity map of the central-eastern part of the Isla Grande de Tierra del Fuego, and a general bathymetric chart of the Lago Fagnano have been realized, on the basis of a series of field geophysical surveys carried out on the Island since 1998. The regional gravity anomaly trend onshore shows a progressive negative gradient from N to S. Distinct, broadly E-W-trending gravity minima are superimposed on this regional negative gradient. They follow the main trace of the Magallanes-Fagnano fault system, which represents the western segment of the left-lateral South America-Scotia transform plate boundary. The gravity minima reflect the presence in the subsurface of restricted and elongated basins developed within the principal displacement zone of the fault system. A relative positive gravity maximum is located just at the SE corner of the Lago Fagnano, and represents the response of a partially exposed crystalline body, occupying an area 3 x 3 km wide. A 2D vertical crustal model has been constructed, combining gravity data inversion and geological information available for the central-eastern region of Lago Fagnano. The bathymetric map of the Lago Fagnano delineates the main morphological features of this 110-km-long, 7-km-wide lake, the largest of Isla Grande. The floor is divided into distinct parts, which suggests that the basin is composed of different sub-basins. In most areas, the basin floor is highly asymmetric in shape, with flat depocentral areas. The most pronounced asymmetry of the basin is seen in the eastern end of the lake, where there is also the deepest depression. The steeper slope of the basin, along the northern shore of the Lago Fagnano, also coincides with the most pronounced regional topographic gradient. The general gravimetric and morphological features of the investigated region are here discussed.Fil: Lodolo, Emanuele. No especifíca;Fil: Lippai, Horacio Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Instituto de Geofísica "Daniel Valencio"; ArgentinaFil: Tassone, Alejandro Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Instituto de Geofísica "Daniel Valencio"; ArgentinaFil: Zanolla, Marianela. No especifíca;Fil: Menichetti, Marco. Università Degli Studi Di Urbino Carlo Bo; ItaliaFil: Hormaechea, José Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaUniversidad de Barcelona2007-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/156231Lodolo, Emanuele; Lippai, Horacio Francisco; Tassone, Alejandro Alberto; Zanolla, Marianela; Menichetti, Marco; et al.; Gravity map of the Isla Grande de Tierra del Fuego, and morphology of Lago Fagnano; Universidad de Barcelona; Geologica Acta; 5; 4; 12-2007; 307-3141695-6133CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://raco.cat/index.php/GeologicaActa/article/view/82438info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:29:28Zoai:ri.conicet.gov.ar:11336/156231instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:29:29.026CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Gravity map of the Isla Grande de Tierra del Fuego, and morphology of Lago Fagnano
title Gravity map of the Isla Grande de Tierra del Fuego, and morphology of Lago Fagnano
spellingShingle Gravity map of the Isla Grande de Tierra del Fuego, and morphology of Lago Fagnano
Lodolo, Emanuele
Tierra del Fuego
Bouguer
Lago Fagnano
Gravity model
title_short Gravity map of the Isla Grande de Tierra del Fuego, and morphology of Lago Fagnano
title_full Gravity map of the Isla Grande de Tierra del Fuego, and morphology of Lago Fagnano
title_fullStr Gravity map of the Isla Grande de Tierra del Fuego, and morphology of Lago Fagnano
title_full_unstemmed Gravity map of the Isla Grande de Tierra del Fuego, and morphology of Lago Fagnano
title_sort Gravity map of the Isla Grande de Tierra del Fuego, and morphology of Lago Fagnano
dc.creator.none.fl_str_mv Lodolo, Emanuele
Lippai, Horacio Francisco
Tassone, Alejandro Alberto
Zanolla, Marianela
Menichetti, Marco
Hormaechea, José Luis
author Lodolo, Emanuele
author_facet Lodolo, Emanuele
Lippai, Horacio Francisco
Tassone, Alejandro Alberto
Zanolla, Marianela
Menichetti, Marco
Hormaechea, José Luis
author_role author
author2 Lippai, Horacio Francisco
Tassone, Alejandro Alberto
Zanolla, Marianela
Menichetti, Marco
Hormaechea, José Luis
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Tierra del Fuego
Bouguer
Lago Fagnano
Gravity model
topic Tierra del Fuego
Bouguer
Lago Fagnano
Gravity model
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv A complete Bouguer gravity map of the central-eastern part of the Isla Grande de Tierra del Fuego, and a general bathymetric chart of the Lago Fagnano have been realized, on the basis of a series of field geophysical surveys carried out on the Island since 1998. The regional gravity anomaly trend onshore shows a progressive negative gradient from N to S. Distinct, broadly E-W-trending gravity minima are superimposed on this regional negative gradient. They follow the main trace of the Magallanes-Fagnano fault system, which represents the western segment of the left-lateral South America-Scotia transform plate boundary. The gravity minima reflect the presence in the subsurface of restricted and elongated basins developed within the principal displacement zone of the fault system. A relative positive gravity maximum is located just at the SE corner of the Lago Fagnano, and represents the response of a partially exposed crystalline body, occupying an area 3 x 3 km wide. A 2D vertical crustal model has been constructed, combining gravity data inversion and geological information available for the central-eastern region of Lago Fagnano. The bathymetric map of the Lago Fagnano delineates the main morphological features of this 110-km-long, 7-km-wide lake, the largest of Isla Grande. The floor is divided into distinct parts, which suggests that the basin is composed of different sub-basins. In most areas, the basin floor is highly asymmetric in shape, with flat depocentral areas. The most pronounced asymmetry of the basin is seen in the eastern end of the lake, where there is also the deepest depression. The steeper slope of the basin, along the northern shore of the Lago Fagnano, also coincides with the most pronounced regional topographic gradient. The general gravimetric and morphological features of the investigated region are here discussed.
Fil: Lodolo, Emanuele. No especifíca;
Fil: Lippai, Horacio Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Instituto de Geofísica "Daniel Valencio"; Argentina
Fil: Tassone, Alejandro Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Instituto de Geofísica "Daniel Valencio"; Argentina
Fil: Zanolla, Marianela. No especifíca;
Fil: Menichetti, Marco. Università Degli Studi Di Urbino Carlo Bo; Italia
Fil: Hormaechea, José Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
description A complete Bouguer gravity map of the central-eastern part of the Isla Grande de Tierra del Fuego, and a general bathymetric chart of the Lago Fagnano have been realized, on the basis of a series of field geophysical surveys carried out on the Island since 1998. The regional gravity anomaly trend onshore shows a progressive negative gradient from N to S. Distinct, broadly E-W-trending gravity minima are superimposed on this regional negative gradient. They follow the main trace of the Magallanes-Fagnano fault system, which represents the western segment of the left-lateral South America-Scotia transform plate boundary. The gravity minima reflect the presence in the subsurface of restricted and elongated basins developed within the principal displacement zone of the fault system. A relative positive gravity maximum is located just at the SE corner of the Lago Fagnano, and represents the response of a partially exposed crystalline body, occupying an area 3 x 3 km wide. A 2D vertical crustal model has been constructed, combining gravity data inversion and geological information available for the central-eastern region of Lago Fagnano. The bathymetric map of the Lago Fagnano delineates the main morphological features of this 110-km-long, 7-km-wide lake, the largest of Isla Grande. The floor is divided into distinct parts, which suggests that the basin is composed of different sub-basins. In most areas, the basin floor is highly asymmetric in shape, with flat depocentral areas. The most pronounced asymmetry of the basin is seen in the eastern end of the lake, where there is also the deepest depression. The steeper slope of the basin, along the northern shore of the Lago Fagnano, also coincides with the most pronounced regional topographic gradient. The general gravimetric and morphological features of the investigated region are here discussed.
publishDate 2007
dc.date.none.fl_str_mv 2007-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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://hdl.handle.net/11336/156231
Lodolo, Emanuele; Lippai, Horacio Francisco; Tassone, Alejandro Alberto; Zanolla, Marianela; Menichetti, Marco; et al.; Gravity map of the Isla Grande de Tierra del Fuego, and morphology of Lago Fagnano; Universidad de Barcelona; Geologica Acta; 5; 4; 12-2007; 307-314
1695-6133
CONICET Digital
CONICET
url http://hdl.handle.net/11336/156231
identifier_str_mv Lodolo, Emanuele; Lippai, Horacio Francisco; Tassone, Alejandro Alberto; Zanolla, Marianela; Menichetti, Marco; et al.; Gravity map of the Isla Grande de Tierra del Fuego, and morphology of Lago Fagnano; Universidad de Barcelona; Geologica Acta; 5; 4; 12-2007; 307-314
1695-6133
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://raco.cat/index.php/GeologicaActa/article/view/82438
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Universidad de Barcelona
publisher.none.fl_str_mv Universidad de Barcelona
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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