Show simple item record Acocella, V. Gioncada, A. Omarini, Ricardo Hector Riller, U. Mazzuoli, R. Vezzoli, L. 2017-02-16T15:05:25Z 2011-06
dc.identifier.citation Acocella, V.; Gioncada, A.; Omarini, Ricardo Hector; Riller, U.; Mazzuoli, R.; et al.; Tectonomagmatic characteristics of the back‐arc portion of the Calama–Olacapato–El Toro Fault Zone, Central Andes; American Geophysical Union; Tectonics; 30; 3; 6-2011; 1-19; TC3005
dc.identifier.issn 0278-7407
dc.description.abstract Post–20 Ma magmatism in the Central Andes is either localized in the magmatic arc or distributed east of it, on the Altiplano-Puna Plateau. Here there is a distinct concentration of magmatic centers on NW–SE trending lineaments, such as the Calama–Olacapato–El Toro (COT), that extends into the Eastern Cordillera to the east of the Puna. Understanding the possible genetic relationship between prominent structures and magmatic centers on these lineaments is important to elucidate the tectonomagmatic evolution of the Central Andes. We investigated the back-arc area of the COT using remote sensing, geological, structural, and petrochemical data. Our study demonstrates that this portion of the COT consists of NW–SE striking faults, formed under overall left-lateral transtension that decreases in activity toward the COT termini. Deformation on the COT occurred during and after activity of prominent N–S striking transpressive fault systems and is coeval with magmatism, which is focused on the central COT. The most evolved magmatic rocks, with an upper crustal imprint, are exposed on the central COT, whereas more primitive, mantle-derived mafic to moderately evolved magmatic rocks, are found toward the COT termini. This points to a genetic relationship between upper crustal deformation and magmatic activity that led to enhanced magma storage in the central COT. COT magmas may result either from slab steepening or episodic delamination of the asthenospheric mantle.
dc.format application/pdf
dc.language.iso fr
dc.publisher American Geophysical Union
dc.rights info:eu-repo/semantics/openAccess
dc.subject Tectonic
dc.subject Volcanology
dc.subject Central Andes
dc.subject.classification Geología
dc.subject.classification Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification CIENCIAS NATURALES Y EXACTAS
dc.title Tectonomagmatic characteristics of the back‐arc portion of the Calama–Olacapato–El Toro Fault Zone, Central Andes
dc.type info:eu-repo/semantics/article
dc.type info:ar-repo/semantics/artículo
dc.type info:eu-repo/semantics/publishedVersion 2017-02-15T14:13:31Z
dc.journal.volume 30
dc.journal.number 3
dc.journal.pagination 1-19; TC3005
dc.journal.pais Estados Unidos
dc.journal.ciudad Washington DC
dc.description.fil Fil: Acocella, V.. Università Roma Tre; Italia
dc.description.fil Fil: Gioncada, A.. Universita Degli Studi Di Pisa; Italia
dc.description.fil Fil: Omarini, Ricardo Hector. Universidad Nacional de Salta. Facultad de Ciencias Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Salta; Argentina
dc.description.fil Fil: Riller, U.. McMaster University; Canadá
dc.description.fil Fil: Mazzuoli, R.. Universita Degli Studi Di Pisa; Italia
dc.description.fil Fil: Vezzoli, L.. Università dell’Insubria; Italia
dc.journal.title Tectonics
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/doi/
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/url/

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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)