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dc.contributor.author
Ronda, Gonzalo
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dc.contributor.author
Ghiglione, Matias
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dc.contributor.author
Barberon, Vanesa
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dc.contributor.author
Coutand, Isabelle
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dc.contributor.author
Tobal, Jonathan Elías
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dc.date.available
2020-02-14T14:24:26Z
dc.date.issued
2019-08
dc.identifier.citation
Ronda, Gonzalo; Ghiglione, Matias; Barberon, Vanesa; Coutand, Isabelle; Tobal, Jonathan Elías; Mesozoic - Cenozoic evolution of the Southern Patagonian Andes fold and
thrust belt (47°-48°S): Influence of the Rocas Verdes basin inversion and
onset of Patagonian glaciations; Elsevier Science; Tectonophysics; 765; 8-2019; 83-101
dc.identifier.issn
0040-1951
dc.identifier.uri
http://hdl.handle.net/11336/97538
dc.description.abstract
The Southern Patagonian Andes (SPA)between 47°?48°S are characterized by relatively high elevations (1500?4000 m)and a 200-km-wide, largely exhumed, basement domain along the backbone of the Cordillera, bounded by a narrow 30-km-wide fold and thrust-belt to the east. The tectonic evolution of the SPA includes widespread Jurassic extension during the opening of the Austral-Magallanes basin and the Rocas Verdes back-arc oceanic basin (RVB), followed by Cretaceous to Cenozoic shortening. Although the main phases of deformation that affected this Andean segment have been the focus of previous studies, its finite geometry and step by step structural and kinematic evolution have not been quantitatively determined. In this work, we present kinematically restored cross sections, showing the variable geometry, trough time, of the eastern basement domain and the fold and thrust-belt. A regional westward-dipping listric decollement, interpreted as formed during the Jurassic extensional event, was reactivated during the Andean deformation constituting the main detachment surface of basement structures and the fold and thrust belt. West verging faults systems are considered a consequence of inversion of north-south trending extensional features as passive roof high-angle west-vergent faults. Using regional data such as field relations, unconformities, and existing ages to differentiate deformational stages, three main phases of contractional deformation are proposed for the area, starting with an Aptian - Cenomanian? phase related to inversion of the extensional depocenter in inmediate response to the closure of northernmost RVB. A second, Miocene phase responsible for most of the shortening occurred between 18 Ma and 10 Ma. Finally, the onset of glaciations and glacial erosion might have triggered out-of-sequence thrusting in the interior of the orogen after 7 Ma.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
AUTRAL-MAGALLANES\ROCAS VERDES BASIN INVERSION
dc.subject
BALANCED CROSS SECTIONS
dc.subject
CRETACEOUS DEFORMATION
dc.subject
PATAGONIAN ANDES
dc.subject
TECTONIC INVERSION
dc.subject.classification
Geociencias multidisciplinaria
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Mesozoic - Cenozoic evolution of the Southern Patagonian Andes fold and
thrust belt (47°-48°S): Influence of the Rocas Verdes basin inversion and
onset of Patagonian glaciations
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-01-06T17:04:48Z
dc.journal.volume
765
dc.journal.pagination
83-101
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Ámsterdam
dc.description.fil
Fil: Ronda, Gonzalo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
dc.description.fil
Fil: Ghiglione, Matias. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
dc.description.fil
Fil: Barberon, Vanesa. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
dc.description.fil
Fil: Coutand, Isabelle. Dalhousie University Halifax; Canadá
dc.description.fil
Fil: Tobal, Jonathan Elías. Universidad de Buenos Aires; Argentina
dc.journal.title
Tectonophysics
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1016/j.tecto.2019.05.009
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0040195119301933
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