Igneous rock associations 25. Pre-pliocene andean magmatism in chile

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datacite.alternateIdentifier.citationGeoscience Canada, 47 (1), 82-65, 2020
datacite.alternateIdentifier.doi10.12789/geocanj.2020.47.158
datacite.alternateIdentifier.issn1911-4850
datacite.creatorOliveros, Veronica
datacite.creatorMoreno-Yaeger, Pablo
datacite.creatorFlores, Laura
datacite.date2020
datacite.rightsRegistro bibliográfico
datacite.subjectIsotopes
datacite.subjectStructural Geology
datacite.subjectTrace Elements
datacite.subjectVolcanic Rocks
datacite.subjectVolcanoes
datacite.subjectConvergence Rates
datacite.subjectConvergent Margin
datacite.subjectIsotopic Signatures
datacite.subjectMajor And Trace Elements
datacite.subjectOceanic Lithosphere
datacite.subjectPetrographic Characteristics
datacite.subjectPhysical Parameters
datacite.subjectSubducting Slabs
datacite.subjectSedimentary Rocks
datacite.subjectAndesite
datacite.subjectContinental Arc
datacite.subjectConvergent Margin
datacite.subjectEocene
datacite.subjectHettangian
datacite.subjectIgneous Rock
datacite.subjectMagmatism
datacite.subjectOceanic Lithosphere
datacite.subjectPetrography
datacite.subjectPliocene
datacite.subjectRhaetian
datacite.subjectSedimentary Rock
datacite.subjectSlab
datacite.subjectSubduction Zone
datacite.subjectVolcanic Rock
datacite.subjectAndes
datacite.subjectChile
datacite.subjectCoastal Cordillera
datacite.subjectPacific Coast [chile]
datacite.subjectPacific Coast [south America]
datacite.subjectSouth America
datacite.titleIgneous rock associations 25. Pre-pliocene andean magmatism in chile
dc.description.abstractAndean-type magmatism and the term andesite are often used as the norm for the results of subduction of oceanic lithosphere under a continent, and the typical rock formed. Although the Andes chain occupies the whole western margin of South America, the most comprehensively studied rocks occur in the present-day Chilean territory and are the focus of this paper. Andean magmatism in this region developed from the Rhaetian-Hettangian boundary (ca. 200 Ma) to the present and represents the activity of a long-lived continental magmatic arc. This paper discusses Pre-Pleistocene volcanic, plu-tonic, and volcano-sedimentary rocks related to the arc that cover most of the continental mass of Chile (between the Pacific coast and the High Andes) between the latitudes of 18° and 50°S. They comprise most of the range of sub-alkaline igneous rocks, from gabbro to monzogranite and from basalt to rhyolite, but are dominated by the tonalite-granodiorite and andesite example members. Variations in the petrographic characteristics, major and trace element composition and isotopic signature of the igneous rocks can be correlated to changes in the physical parameters of the subduction zone, such as dip angle of the subducting slab, convergence rate and angle of convergence. Early Andean magmatic products (Jurassic to Early Cretaceous) are found along the Coastal Cordillera in the westernmost part of the Andes. The rock record of the subsequent stages (Late Cretaceous, Pale-ocene Early Eocene, Middle Eocene Oligocene, Miocene) is progressively shifted to the east, reflecting migration of the magmatic front towards the continent. Tectonic segmentation of the convergent margin, as attested by the magmatic record, may have occurred throughout the Andean life span but it is particularly evident from the Eocene onwards, where the evolution of the northern part of the Chilean Andes (north of 27°S latitude) is very different to that of the southern segment (south of 27°S latitude). © 2020 Elsevier B.V., All rights reserved.
dc.description.ia_keywordandean, andes, rocks, magmatic, magmatism, rock, most
dc.identifier.issn0315-0941
dc.identifier.urihttps://repositoriodigital.uct.cl/handle/10925/4439
dc.language.isoen
dc.publisherGeological Association of Canada
dc.relationinstname: ANID
dc.relationreponame: Repositorio Digital RI2.0
dc.rights.driverinfo:eu-repo/semantics/openAccess
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/
dc.sourceGeoscience Canada
dc.type.driverinfo:eu-repo/semantics/article
dc.type.driverhttp://purl.org/coar/resource_type/c_2df8fbb1
dc.type.openaireinfo:eu-repo/semantics/publishedVersion
dspace.entity.typePublication
oaire.citationEdition2020
oaire.citationEndPage82
oaire.citationIssue1
oaire.citationStartPage65
oaire.citationTitleGeoscience Canada
oaire.citationVolume47
oaire.fundingReferenceUdeC ENLACE 2018.025.041
oaire.fundingReferenceANID FONDECYT 1120715
oaire.licenseConditionCopyright © The Geological Association of Canada, 2020
oaire.resourceTypeArtículo
oaire.resourceType.enArticle
uct.catalogadorjvu
uct.comunidadIngenieríaen_US
uct.departamentoDepartamento de Obras Civiles y Geología
uct.facultadFacultad de Ingeniería
uct.indizacionScopus
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