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dc.contributor.author
Dahlquist, Juan Andres
dc.contributor.author
Alasino, Pablo Horacio
dc.contributor.author
Bello, Carina
dc.date.available
2017-01-27T20:06:11Z
dc.date.issued
2014-06
dc.identifier.citation
Dahlquist, Juan Andres; Alasino, Pablo Horacio; Bello, Carina; Devonian F-rich peraluminous A-type magmatism in the proto-Andean foreland (Sierras Pampeanas, Argentina): geochemical constraints and petrogenesis from the western-central region of the Achala batholith; Springer; Mineralogy and Petrology; 108; 3; 6-2014; 391-417
dc.identifier.issn
0930-0708
dc.identifier.uri
http://hdl.handle.net/11336/12093
dc.description.abstract
A new LA-ICP-MS crystallization age of 370 ± 8 Ma is presented for monzogranite from the Achala batholith, the largest Devonian igneous body in the Sierras Pampeanas, confirming previous U-Pb zircon ages and indicating emplacement within a relatively short episode. Granitic rocks from the central area of the batholith display restricted high SiO2 contents (69.8–74.5 wt.%). Major element plots show ferroan and alkaline-calcic to calc-alkaline compositions with an A-type signature. High concentrations of the high field-strength elements such as Y, Nb, Ga, Ta, U, Th, and flat REE patterns with significant negative Eu anomalies, are also typical of A-type granites. The aluminium saturation index (1.10–1.37) indicates aluminous parent magmas which are further characterised by high FeO/MgO ratios (2.6–3.3) and F contents of igneous biotites (0.9–1.5 wt%), as well as relatively high AlIV (2.39–2.58 a.p.f.u.) in biotites and the occurrence of primary muscovite. Petrogenetic modelling supports a source enriched in plagioclase and progressive fractional crystallization of feldspar. The central area of the batholith displays small-scale bodies composed predominantly of biotite (80 %), muscovite (10 %) and apatite (10 %), yielding rock compositions with 2.3–5.4 wt. % P2O5, and 6–7 wt.% F, together with anomalous contents of U (88–1,866 ppm), Zr (1081–2,581 ppm), Nb (257–1,395 ppm) and ΣREE (1,443–4,492 ppm). Previous studies rule out an origin of these bodies as metasedimentary xenoliths and they have been interpreted as cumulates from the granitic magma. An alternative flow segregation process is discussed here.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Late Devonian
dc.subject
Granites
dc.subject
Geochemistry
dc.subject
Nd-Isotopes
dc.subject
Geochronology
dc.subject.classification
Geociencias multidisciplinaria
dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Devonian F-rich peraluminous A-type magmatism in the proto-Andean foreland (Sierras Pampeanas, Argentina): geochemical constraints and petrogenesis from the western-central region of the Achala batholith
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-01-27T14:16:32Z
dc.journal.volume
108
dc.journal.number
3
dc.journal.pagination
391-417
dc.journal.pais
Alemania
dc.journal.ciudad
Berlín
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
dc.description.fil
Fil: Alasino, Pablo Horacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Regional de Investigaciones Cientificas y Transferencia Tecnológica de Anillaco; Argentina. Universidad Nacional de la Rioja; Argentina
dc.description.fil
Fil: Bello, Carina. Comisión Nacional de Energía Atómica; Argentina
dc.journal.title
Mineralogy and Petrology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1007%2Fs00710-013-0308-0
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s00710-013-0308-0


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Comunidades y colecciones

  • Articulos(CRILAR) [275]
    Articulos de CENTRO REGIONAL DE INV. CIENTIFICAS Y TRANSFERENCIA TECNOLOGICA DE ANILLACO
  • Articulos(CICTERRA) [482]
    Articulos de CENTRO DE INVEST.EN CS.DE LA TIERRA

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