A plastic rheology phenomenological 201 . model that explains the Andes evolution in northern Argentina

A plastic rheology, partially phenomenological model is presented to explain the isostatically compensated Andean relief formation. This model considers a combination of lithospheric heating with long period relaxation and successive crustal shortenings on a north section of Argentina located at 2...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Introcaso, Antonio, Giménez, Mario, Martínez, María Patricia, Ruiz, Francisco
Formato: artículo publishedVersion article
Lenguaje:Inglés
Publicado: Instituto de Fisiografía y Geología. Facultad de Ciencias Exactas, Ingeniería y Agrimensura. Universidad Nacional de Rosario 2012
Materias:
Andean relief
Crustal shortening
Andean root
Bouguer anomalies
Isostatic balance
Northern Argentina
Acceso en línea:http://hdl.handle.net/2133/2214
http://hdl.handle.net/2133/2214
Aporte de:
Repositorio Hipermedial de la Universidad Nacional de Rosario (UNR) de Universidad Nacional de Rosario
id I15-R121-2133-2214
record_format dspace
institution Universidad Nacional de Rosario
institution_str I-15
repository_str R-121
collection Repositorio Hipermedial de la Universidad Nacional de Rosario (UNR)
language Inglés
orig_language_str_mv eng
topic Andean relief
Crustal shortening
Andean root
Bouguer anomalies
Isostatic balance
Northern Argentina
spellingShingle Andean relief
Crustal shortening
Andean root
Bouguer anomalies
Isostatic balance
Northern Argentina
Introcaso, Antonio
Giménez, Mario
Martínez, María Patricia
Ruiz, Francisco
A plastic rheology phenomenological 201 . model that explains the Andes evolution in northern Argentina
topic_facet Andean relief
Crustal shortening
Andean root
Bouguer anomalies
Isostatic balance
Northern Argentina
description A plastic rheology, partially phenomenological model is presented to explain the isostatically compensated Andean relief formation. This model considers a combination of lithospheric heating with long period relaxation and successive crustal shortenings on a north section of Argentina located at 24°S latitude. The present size of the Andean root –related to the Andes construction– was obtained by inverting regionalized Bouguer anomalies, also consistent with geoid undulations. The relief of 1520 km is balanced both with a thermal root of 70.63 km located at the lithospheric mantle and 2 with an evolutionary crustal root originated by shortenings. A pretended contradiction must be noted: lateral compressive shortenings and side moving tending to squash and to widen the high relief. For better understanding the problem, a linear model is first presented. Then, a nonlinear model of plastic rheology is considered with a stability coefficient depending on width and elevation. We have assumed that isostatic balance keeps on the whole orogenic construction. We also impose an empirical stability relationship. If this relationship does not hold, there will be an extra relief and therefore an extra root that will plastically flow until reaching stability.
format artículo
publishedVersion
article
author Introcaso, Antonio
Giménez, Mario
Martínez, María Patricia
Ruiz, Francisco
author_facet Introcaso, Antonio
Giménez, Mario
Martínez, María Patricia
Ruiz, Francisco
author_sort Introcaso, Antonio
title A plastic rheology phenomenological 201 . model that explains the Andes evolution in northern Argentina
title_short A plastic rheology phenomenological 201 . model that explains the Andes evolution in northern Argentina
title_full A plastic rheology phenomenological 201 . model that explains the Andes evolution in northern Argentina
title_fullStr A plastic rheology phenomenological 201 . model that explains the Andes evolution in northern Argentina
title_full_unstemmed A plastic rheology phenomenological 201 . model that explains the Andes evolution in northern Argentina
title_sort plastic rheology phenomenological 201 . model that explains the andes evolution in northern argentina
publisher Instituto de Fisiografía y Geología. Facultad de Ciencias Exactas, Ingeniería y Agrimensura. Universidad Nacional de Rosario
publishDate 2012
url http://hdl.handle.net/2133/2214
http://hdl.handle.net/2133/2214
work_keys_str_mv AT introcasoantonio aplasticrheologyphenomenological201modelthatexplainstheandesevolutioninnorthernargentina
AT gimenezmario aplasticrheologyphenomenological201modelthatexplainstheandesevolutioninnorthernargentina
AT martinezmariapatricia aplasticrheologyphenomenological201modelthatexplainstheandesevolutioninnorthernargentina
AT ruizfrancisco aplasticrheologyphenomenological201modelthatexplainstheandesevolutioninnorthernargentina
AT introcasoantonio plasticrheologyphenomenological201modelthatexplainstheandesevolutioninnorthernargentina
AT gimenezmario plasticrheologyphenomenological201modelthatexplainstheandesevolutioninnorthernargentina
AT martinezmariapatricia plasticrheologyphenomenological201modelthatexplainstheandesevolutioninnorthernargentina
AT ruizfrancisco plasticrheologyphenomenological201modelthatexplainstheandesevolutioninnorthernargentina
bdutipo_str Repositorios
_version_ 1764820411958165506

Ejemplares similares