Artículo
3D litho-constrained inversion model of southern Sierra Grande de San Luis: New insights into the Famatinian tectonic setting
Christiansen, Rodolfo Omar
; Morosini, Augusto Francisco
; Enriquez, Eliel
; Muñoz, Brian Lucas
; Lince Klinger, Federico Gustavo
; Martínez, Myriam Patricia
; Ortiz Suarez, Ariel Emilio; Kostadinoff, Jose
Fecha de publicación:
05/04/2019
Editorial:
Elsevier Science
Revista:
Tectonophysics
ISSN:
0040-1951
e-ISSN:
1879-3266
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Unravelling the orogenic structure of the Sierra Grande de San Luis (Argentina) is essential to understand the geological evolution of the Famatinian orogen and the western margin of Gondwana. However, its structural organization is still poorly known and widely debated. In this contribution, a new interpretation of the complex geological structures in the southern sector of the Sierra Grande de San Luis is presented. This work is based on a litho-constrained joint inversion of gravity and magnetic datasets combining lithological, structural and rock properties information. Results are consistent with a large-scale doubly-vergent structure caused by a compressional tectonic setting as a consequence of the collision between an allochthonous terrane (Cuyania/Precordillera) and the proto margin of Western Gondwana. A convex morphology of the indenter is proposed to be responsible for producing a significant clockwise rotation of the horizontal deviatoric stresses. This stress field caused a small sinistral component of movement and gave rise to the doubly-vergent transpressive mega-structure.
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Articulos(CCT - SAN JUAN)
Articulos de CENTRO CIENTIFICO TECNOLOGICO CONICET - SAN JUAN
Articulos de CENTRO CIENTIFICO TECNOLOGICO CONICET - SAN JUAN
Articulos(CCT - SAN LUIS)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - SAN LUIS
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - SAN LUIS
Citación
Christiansen, Rodolfo Omar; Morosini, Augusto Francisco; Enriquez, Eliel; Muñoz, Brian Lucas; Lince Klinger, Federico Gustavo; et al.; 3D litho-constrained inversion model of southern Sierra Grande de San Luis: New insights into the Famatinian tectonic setting; Elsevier Science; Tectonophysics; 756; 5-4-2019; 1-24
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