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dc.contributor.author
Dahlquist, Juan Andres
dc.contributor.author
Pankhurst, Robert J.
dc.contributor.author
Gaschnig, Richard M.
dc.contributor.author
Rapela, Carlos Washington
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Casquet, César
dc.contributor.author
Alasino, Pablo Horacio
dc.contributor.author
Galindo, Carmen
dc.contributor.author
Baldo, Edgardo Gaspar Agustin
dc.date.available
2017-03-29T21:44:36Z
dc.date.issued
2013-05
dc.identifier.citation
Dahlquist, Juan Andres; Pankhurst, Robert J.; Gaschnig, Richard M.; Rapela, Carlos Washington; Casquet, César; et al.; Hf and Nd isotopes in Early Ordovician to Early Carboniferous granites as monitors of crustal growth in the Proto-Andean margin of Gondwana; Elsevier Science; Gondwana Research; 23; 4; 5-2013; 1617-1630
dc.identifier.issn
1342-937X
dc.identifier.uri
http://hdl.handle.net/11336/14486
dc.description.abstract
We report the first study integrating in situ U–Pb and Hf isotope data from magmatic zircon and whole-rock Sm–Nd isotope data for granitic rocks of the Sierras Pampeanas, Argentina, in order to evaluate the Palaeozoic growth of the proto-Andean margin of Gondwana. Early–Middle Ordovician granitic magmatism is by far the most voluminous of the Sierras Pampeanas and represents the most significant magmatic event. These calc-alkaline granitoids were intruded at an active continental margin. εHft values range from − 3.3 to − 14.7 and εNdt from − 3.3 to − 6.3 (t = 473 Ma), with average TDM Hf and TDM Nd ranging from 1.5 to 2.2 Ga and 1.4 to 1.7 Ga, respectively. Middle–Late Devonian magmatism occurred in the foreland, away from the orogenic front in the west, and included F-U-REE rich A-type granites. The Achala granite, the largest batholith in the Sierras Pampeanas, has εHft and εNdt values ranging from − 3.6 to − 5.8 and − 4.0 to − 6.5, respectively (t = 369 Ma). Small scattered Early Carboniferous A-type granite plutons were intruded in a dominantly extensional setting and have εHft and εNdt values ranging from − 6.7 to + 2.2 and − 0.5 to − 3.6, respectively (t = 341 Ma). The generation of Ordovician and Devonian magmas dominantly involved crustal reworking and stabilization rather than the formation of new continental crust by juvenile material accretion, whereas Carboniferous magmatism resulted in part from reworking of supracrustal material, but with variable addition of juvenile magmas.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject
Upb Dating
dc.subject
Hf And Nd Isotopes
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Zircon
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Crustal Growth
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Proto-Andean Margin of Gondwana
dc.subject.classification
Geoquímica y Geofísica
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Hf and Nd isotopes in Early Ordovician to Early Carboniferous granites as monitors of crustal growth in the Proto-Andean margin of Gondwana
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-01-27T13:28:37Z
dc.journal.volume
23
dc.journal.number
4
dc.journal.pagination
1617-1630
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Dahlquist, Juan Andres. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Centro de Investigaciones en Ciencias de la Tierra; Argentina. Universidad Nacional de Córdoba; Argentina. Universidad Nacional de la Rioja; Argentina
dc.description.fil
Fil: Pankhurst, Robert J.. British Geological Survey; Reino Unido
dc.description.fil
Fil: Gaschnig, Richard M.. University of Maryland; Estados Unidos
dc.description.fil
Fil: Rapela, Carlos Washington. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Centro de Investigaciones Geológicas (i); Argentina. Universidad Nacional de La Plata; Argentina
dc.description.fil
Fil: Casquet, César. Universidad Complutense de Madrid; España
dc.description.fil
Fil: Alasino, Pablo Horacio. Universidad Nacional de la Rioja; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Regional de Investigaciones Cientificas y Transferencia Tecnológica de Anillaco; Argentina; Argentina
dc.description.fil
Fil: Galindo, Carmen. Universidad Complutense de Madrid; España
dc.description.fil
Fil: Baldo, Edgardo Gaspar Agustin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Centro de Investigaciones en Ciencias de la Tierra; Argentina. Universidad Nacional de Córdoba; Argentina
dc.journal.title
Gondwana Research
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.gr.2012.08.013
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S1342937X12002900


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