Ordovician metamorphism and magmatism preserved in the Ossa Morena Complex: SHRIMP geochronology, geochemistry and Srsingle bondNd isotopic signatures of the Sierra Albarrana Domain (SW Iberian Massif)

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dc.contributor.authorSolís Alulima, B.E.
dc.contributor.authorLópez Carmona, Alicia
dc.contributor.authorAbati Gómez, Jacobo
dc.date.accessioned2023-06-16T15:23:28Z
dc.date.available2023-06-16T15:23:28Z
dc.date.issued2020-11
dc.description.abstractThis study integrates SHRIMP Usingle bondPb zircon geochronology and whole-rock and Srsingle bondNd isotope geochemistry data from migmatites and granitic rocks of the Sierra Albarrana Domain. We provide new information on the magmatic and metamorphic events of this domain of the Ossa-Morena Complex. The metasedimentary succession, nowadays corresponding to a migmatite dome, was probably deposited during the Ediacaran and Cambrian. SHRIMP Usingle bondPb ages of magmatic and zoned metamorphic zircon grains indicate that the main tectono-magmatic event in the Sierra Albarrana Domain is Late Cambrian (granite emplacement; 481.2 ± 2.3 Ma) to early Ordovician (migmatization; 477.8 ± 2.4 Ma), supported by the intrusion of La Cardenchosa Pluton, by the low-pressure partial melting and by the ductile deformation of the host metasedimentary rocks. We suggest that the granitic magmatism, the migmatization and the main regional fabrics are part of a single Ordovician event, only slightly modified by Variscan reworking. Geochemical and isotopic data are compatible with an extensional environment in the middle-upper crustal levels, related to a continental rift development. This setting and timing are compatible with the latest magmatic event of the Early Paleozoic rifting (535–460 Ma), well documented in the Ossa Morena Complex. The geochemical characteristics of the subalkaline rift-related rocks of the Ossa Morena Complex and of the Central Iberian Zone partly coincide. As a result, it is not possible to discriminate between them and favor a correlation between both terranes based on the geochemical affinities of magmatic rocks of similar age.
dc.description.departmentDepto. de Mineralogía y Petrología
dc.description.facultyFac. de Ciencias Geológicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Economía y Competitividad (MINECO)
dc.description.sponsorshipUniversidad Complutense de Madrid
dc.description.sponsorshipMICIU
dc.description.sponsorshipRussian Federation
dc.description.sponsorshipUniversity of Salamanca
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/62203
dc.identifier.doi10.1016/j.lithos.2020.105700
dc.identifier.issn0024-4937
dc.identifier.officialurlhttps://www.sciencedirect.com/science/article/abs/pii/S0024493720303376#!
dc.identifier.urihttps://hdl.handle.net/20.500.14352/6557
dc.issue.number105700
dc.journal.titleLithos
dc.language.isoeng
dc.publisherElsevier
dc.relation.projectIDCGL2016-76438-P
dc.relation.projectIDCT17/17-CT18/17
dc.relation.projectIDPGC2018-096534-B-I00
dc.relation.projectID14.Y26.31.0012
dc.relation.projectIDPOSDOC2018_USAL02
dc.rights.accessRightsrestricted access
dc.subject.cdu552.3(460)
dc.subject.cdu552.4(460)
dc.subject.keywordU-Pb geochronology
dc.subject.keywordSr-Nd isotopes
dc.subject.keywordOssa-Morena Complex
dc.subject.keywordSierra Albarrana Domain
dc.subject.keywordCambro-Ordovician magmatism
dc.subject.ucmGeoquímica
dc.subject.ucmPetrología
dc.subject.unesco2503 Geoquímica
dc.titleOrdovician metamorphism and magmatism preserved in the Ossa Morena Complex: SHRIMP geochronology, geochemistry and Srsingle bondNd isotopic signatures of the Sierra Albarrana Domain (SW Iberian Massif)
dc.typejournal article
dc.volume.number374
dspace.entity.typePublication
relation.isAuthorOfPublicationc3a6c522-f2ad-449a-a709-f4e723b6fbdd
relation.isAuthorOfPublication6cb07e41-d685-424f-9bd7-48e62c3dc87f
relation.isAuthorOfPublication.latestForDiscoveryc3a6c522-f2ad-449a-a709-f4e723b6fbdd
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