Crustal structure and tectonic setting of the south central Andes from gravimetric analysis

Based on terrestrial gravity data, in this paper we prepared a map of Bouguer anomalies, which was filtered to separate shallow and deep gravity sources. Based on a density model and gravimetric inversion techniques, the discontinuous crust-mantle boundary and the top of crystalline basement were mo...

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Detalles Bibliográficos
Autores: Weidmann, Cecilia, Spagnotto, Silvana, Giménez, Mario, Álvarez, Orlando, Sánchez, Marcos, Lince Klinger, Federico
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2013
País:México
Institución:UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO
Repositorio:Geofísica Internacional
Idioma:español
inglés
OAI Identifier:oai:revistagi.geofisica.unam.mx:article/413
Acceso en línea:http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/413
Access Level:acceso abierto
Palabra clave:gravedad
isostasia
espesor elástico equivalente
Andes centrales
modelo cortical
Sierras Pampeanas
gravity
isostasy
equivalent elastic thickness
southern Andes
crustal model
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spelling Crustal structure and tectonic setting of the south central Andes from gravimetric analysisCrustal structure and tectonic setting of the south central Andes from gravimetric analysisWeidmann, Cecilia Spagnotto, Silvana Giménez, Mario Álvarez, Orlando Sánchez, Marcos Lince Klinger, Federico gravedadisostasiaespesor elástico equivalenteAndes centralesmodelo corticalSierras Pampeanasgravityisostasyequivalent elastic thicknesssouthern Andescrustal modelSierras PampeanasBased on terrestrial gravity data, in this paper we prepared a map of Bouguer anomalies, which was filtered to separate shallow and deep gravity sources. Based on a density model and gravimetric inversion techniques, the discontinuous crust-mantle boundary and the top of crystalline basement were modeled. Subsequently, the equivalent elastic thickness (Te) was evaluated, considering information from the crust-mantle discontinuity and topographic load, finding high Te values in the eastern Andean foothills and west of the Velasco range. These results are consistent with the positive isostatic and residual Bouguer anomaly values, which suggest the presence of high-density rocks in the mid-to upper crust. In addition, petrographic and geochemical analysis conducted in surface outcrops suggest a mantle origin.En el presente trabajo, a partir de datos gravimétricos terrestres, se preparó una carta de anomalías de Bouguer, la cual fue adecuadamente filtrada a fin de separar efectos gravimétricos someros y profundos. Con base en un modelo de densidad, mediante de técnicas de inversión gravimétrica, se modeló la discontinuidad corteza-manto y el basamento cristalino, respectivamente. De forma posterior, se evaluó el espesor elástico equivalente considerando la información de la discontinuidad de la corteza-manto y la carga topográfica. Se encontraron valores altos de espesor elástico Te, al este de la precordillera Andina y al oeste de la sierra Pampeana de Velasco. Estos resultados son consistentes con los valores positivos de anomalía residual de Bouguer e isotáticos, lo que estaría indicando la presencia de rocas de alta densidad en corteza media a superior. Además, los análisis petrográficos y geoquímicos realizados en afloramientos en superficie indican un origen mantélico.Universidad Nacional Autónoma de México. Instituto de Geofísica2013-07-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://revistagi.geofisica.unam.mx/index.php/RGI/article/view/41310.1016/S0016-7169(13)71472-7Geofisica Internacional; Vol. 52 No. 3 (2013): July 1, 2013; 197-208Geofísica Internacional; Vol. 52 Núm. 3 (2013): Julio 1, 2013; 197-2082954-436X0016-716910.22201/igeof.00167169p.2013.52.3reponame:Geofísica Internacionalinstname:UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICOinstacron:UNAMspaenghttp://revistagi.geofisica.unam.mx/index.php/RGI/article/view/413/426http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/413/2196Derechos de autor 2022 Geofisica Internacionalhttps://creativecommons.org/licenses/by-nc-sa/4.0/info:eu-repo/semantics/openAccessoai:revistagi.geofisica.unam.mx:article/4132024-08-16T17:31:52Z
dc.title.none.fl_str_mv Crustal structure and tectonic setting of the south central Andes from gravimetric analysis
Crustal structure and tectonic setting of the south central Andes from gravimetric analysis
title Crustal structure and tectonic setting of the south central Andes from gravimetric analysis
spellingShingle Crustal structure and tectonic setting of the south central Andes from gravimetric analysis
Weidmann, Cecilia
gravedad
isostasia
espesor elástico equivalente
Andes centrales
modelo cortical
Sierras Pampeanas
gravity
isostasy
equivalent elastic thickness
southern Andes
crustal model
Sierras Pampeanas
title_short Crustal structure and tectonic setting of the south central Andes from gravimetric analysis
title_full Crustal structure and tectonic setting of the south central Andes from gravimetric analysis
title_fullStr Crustal structure and tectonic setting of the south central Andes from gravimetric analysis
title_full_unstemmed Crustal structure and tectonic setting of the south central Andes from gravimetric analysis
title_sort Crustal structure and tectonic setting of the south central Andes from gravimetric analysis
dc.creator.none.fl_str_mv Weidmann, Cecilia
Spagnotto, Silvana
Giménez, Mario
Álvarez, Orlando
Sánchez, Marcos
Lince Klinger, Federico
author Weidmann, Cecilia
author_facet Weidmann, Cecilia
Spagnotto, Silvana
Giménez, Mario
Álvarez, Orlando
Sánchez, Marcos
Lince Klinger, Federico
author_role author
author2 Spagnotto, Silvana
Giménez, Mario
Álvarez, Orlando
Sánchez, Marcos
Lince Klinger, Federico
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv gravedad
isostasia
espesor elástico equivalente
Andes centrales
modelo cortical
Sierras Pampeanas
gravity
isostasy
equivalent elastic thickness
southern Andes
crustal model
Sierras Pampeanas
topic gravedad
isostasia
espesor elástico equivalente
Andes centrales
modelo cortical
Sierras Pampeanas
gravity
isostasy
equivalent elastic thickness
southern Andes
crustal model
Sierras Pampeanas
description Based on terrestrial gravity data, in this paper we prepared a map of Bouguer anomalies, which was filtered to separate shallow and deep gravity sources. Based on a density model and gravimetric inversion techniques, the discontinuous crust-mantle boundary and the top of crystalline basement were modeled. Subsequently, the equivalent elastic thickness (Te) was evaluated, considering information from the crust-mantle discontinuity and topographic load, finding high Te values in the eastern Andean foothills and west of the Velasco range. These results are consistent with the positive isostatic and residual Bouguer anomaly values, which suggest the presence of high-density rocks in the mid-to upper crust. In addition, petrographic and geochemical analysis conducted in surface outcrops suggest a mantle origin.
publishDate 2013
dc.date.none.fl_str_mv 2013-07-01
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/413
10.1016/S0016-7169(13)71472-7
url http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/413
identifier_str_mv 10.1016/S0016-7169(13)71472-7
dc.language.none.fl_str_mv spa
eng
language spa
eng
dc.relation.none.fl_str_mv http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/413/426
http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/413/2196
dc.rights.none.fl_str_mv Derechos de autor 2022 Geofisica Internacional
https://creativecommons.org/licenses/by-nc-sa/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Derechos de autor 2022 Geofisica Internacional
https://creativecommons.org/licenses/by-nc-sa/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidad Nacional Autónoma de México. Instituto de Geofísica
publisher.none.fl_str_mv Universidad Nacional Autónoma de México. Instituto de Geofísica
dc.source.none.fl_str_mv Geofisica Internacional; Vol. 52 No. 3 (2013): July 1, 2013; 197-208
Geofísica Internacional; Vol. 52 Núm. 3 (2013): Julio 1, 2013; 197-208
2954-436X
0016-7169
10.22201/igeof.00167169p.2013.52.3
reponame:Geofísica Internacional
instname:UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO
instacron:UNAM
instname_str UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO
instacron_str UNAM
institution UNAM
reponame_str Geofísica Internacional
collection Geofísica Internacional
repository.name.fl_str_mv
repository.mail.fl_str_mv
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