Structural evolution of the Andes in a transitional zone between flat and normal subduction (33°30′-33°45′S), Argentina and Chile

dc.creatorGiambiagi, Laura Beatriz
dc.creatorRamos, Victor Alberto
dc.date2002-12
dc.date.accessioned2023-08-30T23:54:31Z
dc.date.available2023-08-30T23:54:31Z
dc.identifierhttp://hdl.handle.net/11336/40028
dc.identifierGiambiagi, Laura Beatriz; Ramos, Victor Alberto; Structural evolution of the Andes in a transitional zone between flat and normal subduction (33°30′-33°45′S), Argentina and Chile; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 15; 1; 12-2002; 101-116
dc.identifier0895-9811
dc.identifierCONICET Digital
dc.identifierCONICET
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8542899
dc.descriptionThe sector of the Andes studied in this paper (33°30′-33°45′S) presents a key region to study the relationship between tectonic setting and deformation history in a transitional zone between flat (north of 33°S) and normal (south of 33°45′S) subduction segments. The Andes at these latitudes are primarily composed of the Neogene Aconcagua fold-and-thrust belt and the basement-block uplift of the Cordillera Frontal. Detailed mapping has revealed that the structure within the inner part of the fold-and-thrust belt resulted from both thin-and thick-skinned tectonic interactions. In the outer part, displacement is transferred to Mesozoic décollement levels, accounting for a thin-skinned architecture. Geographically, the switch from thick- to -thin skinned tectonics occurs near the border between Chile and Argentina. Although the geometry of the subducted Nazca Plate may have influenced the timing and style of deformation in the foreland, plate geometry alone does not adequately explain the style of deformation within the fold-and-thrust belt. Here it is shown that the change in deformation style in the fold-and-thrust belt correlates with the location of pre-existing Mesozoic structure, and specifically that Neogene-age thick-skinned thrusting was controlled by the presence of Mesozoic margin-boundary normal faults. Deformation in this region of the Andean fold-and-thrust belt was thus controlled by a combination of tectonic setting and pre-existing extensional structure. © 2002 Elsevier Science Ltd. All rights reserved.
dc.descriptionFil: Giambiagi, Laura Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Laboratorio de Tectónica Andina; Argentina
dc.descriptionFil: Ramos, Victor Alberto. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Laboratorio de Tectónica Andina; Argentina
dc.formatapplication/pdf
dc.formatapplication/pdf
dc.languageeng
dc.publisherPergamon-Elsevier Science Ltd
dc.relationinfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0895981102000081
dc.relationinfo:eu-repo/semantics/altIdentifier/doi/10.1016/S0895-9811(02)00008-1
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subjectAndes
dc.subjectFold-And-Thrust Belt
dc.subjectMesozoic Anisotropy
dc.subjectNeogene Deformation
dc.subjectSubduction
dc.subjecthttps://purl.org/becyt/ford/1.5
dc.subjecthttps://purl.org/becyt/ford/1
dc.titleStructural evolution of the Andes in a transitional zone between flat and normal subduction (33°30′-33°45′S), Argentina and Chile
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:ar-repo/semantics/artículo
dc.typeinfo:eu-repo/semantics/publishedVersion


Este ítem pertenece a la siguiente institución