New SHRIMP U-Pb data from the Famatina Complex: constraining Early-Mid Ordovician Famatinian magmatism in the Sierras Pampeanas, Argentina

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dc.contributor.authorDahlquist, Juan A.
dc.contributor.authorPankhurst, R.J.
dc.contributor.authorRapela, Carlos W.
dc.contributor.authorGalindo Francisco, María Del Carmen
dc.contributor.authorAlasino, Pablo H.
dc.contributor.authorFanning, C.M.
dc.contributor.authorSaavedra, Julio
dc.contributor.authorBaldo, Edgardo G.
dc.date.accessioned2023-06-20T09:26:27Z
dc.date.available2023-06-20T09:26:27Z
dc.date.issued2008
dc.description.abstractNew SHRIMP U-Pb zircon ages are reported for igneous and sedimentary rocks of the Famatina Complex, constraining the age of the magmatism and the ensialic basins. Together with whole-rock and isotope geochemistry for the igneous rocks from the complex, these ages indicate that the voluminous parental magmas of metaluminous composition were derived by partial melting of an older lithosphere without significant asthenospheric contribution. This magmatism was initiated in the Early Ordovician (481 Ma). During the Mid-Late Ordovician, the magmatism ceased (463 Ma), resulting in a short-lived (no more than ~20 Ma) and relatively narrow (~100-150 km) magmatic belt, in contrast to the long-lived cordilleran magmatism of the Andes. The exhumation rate of the Famatina Complex was considerably high and the erosional stripping and deposition of Ordovician sediments occurred soon after of the emplacement of the igneous source rocks during the Early to mid-Ordovician. During the upper Mid Ordovician the clastic contribution was mainly derived from plutonic rocks. Magmatism was completely extinguished in the Mid Ordovician and the sedimentary basins closed in the early Late Ordovician.
dc.description.departmentDepto. de Mineralogía y Petrología
dc.description.facultyFac. de Ciencias Geológicas
dc.description.refereedTRUE
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/12133
dc.identifier.doi10.1344/105.000000260
dc.identifier.issn1695-6133
dc.identifier.officialurlhttp://www.geologica-acta.com
dc.identifier.urihttps://hdl.handle.net/20.500.14352/49536
dc.issue.number4
dc.journal.titleGeologica acta
dc.language.isoeng
dc.page.final333
dc.page.initial319
dc.publisherInstituto de Ciencias de la Tierra "Jaume Almera" (Barcelona)
dc.rights.accessRightsopen access
dc.subject.cdu552.3(82)
dc.subject.keywordFamatina Complex
dc.subject.keywordSHRIMP U-Pb data
dc.subject.keywordMagmatism
dc.subject.keywordEnsialic Basins
dc.subject.ucmPetrología
dc.titleNew SHRIMP U-Pb data from the Famatina Complex: constraining Early-Mid Ordovician Famatinian magmatism in the Sierras Pampeanas, Argentina
dc.typejournal article
dc.volume.number6
dspace.entity.typePublication
relation.isAuthorOfPublicationf2fb71b6-b7fd-4fc6-bf39-d4de3ba5a67c
relation.isAuthorOfPublication.latestForDiscoveryf2fb71b6-b7fd-4fc6-bf39-d4de3ba5a67c
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