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dc.contributor.author
Acocella, V.
dc.contributor.author
Gioncada, A.
dc.contributor.author
Omarini, Ricardo Hector
dc.contributor.author
Riller, U.
dc.contributor.author
Mazzuoli, R.
dc.contributor.author
Vezzoli, L.
dc.date.available
2017-02-16T15:05:25Z
dc.date.issued
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.identifier.uri
http://hdl.handle.net/11336/13093
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
fra
dc.publisher
American Geophysical Union
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
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
dc.date.updated
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/http://dx.doi.org/10.1029/2010TC002854
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1029/2010TC002854/abstract


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