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Tracking magmatism and oceanic change through the early Aptian Anoxic Event (OAE 1a) to the late Aptian: insights from osmium isotopes from the westernmost Tethys (SE Spain) Cau Core

dc.contributor.authorMartínez-Rodríguez, R.
dc.contributor.authorSelby, D.
dc.contributor.authorCastro, J.M.
dc.contributor.authorde Gea, G.A.
dc.contributor.authorNieto, L.M.
dc.contributor.authorRuiz-Ortiz, P.A.
dc.date.accessioned2024-10-14T08:59:33Z
dc.date.available2024-10-14T08:59:33Z
dc.date.issued2021-09-29
dc.description.abstractSome of the major Carbon cycle perturbations of the Phanerozoic occurred during the Aptian, in relation to magmatism. The highest temperatures reconstructed for the Cretaceous Period correspond to the Oceanic Anoxic Event of the early Aptian (OAE 1a), an episode of accelerated global change. Here we present a chemostratigraphic study based on osmium isotopes integrated with high-resolution Carbon-Oxygen stable isotope data from the Cau Core (Western Tethys, SE Spain), including a 6.4 Ma record from the early to the late Aptian. This high resolution study of the continuous and expanded Cau section permits a thorough understanding of the duration of the Aptian events, as well as an evaluation of the mechanisms triggering the abrupt changes of the global carbon and osmium cycles and their interdependence. Here we show that the Large Igneous Province (LIP) Aptian magmatism initiated 550–750 kyr prior to the OAE 1a, and persisted for 1.4 Myr after the event, influencing the composition of seawater for 2.8 Myr. We show a continuous Os isotope record encompassing the OAE 1a and the late Aptian for the first time, and demonstrate that the recovery from the exceptionally unradiogenic composition of seawater Os produced by the dominance of the Ontong Java Plateau volcanism, was slow. Our results demonstrate the different time duration of some events, and the asynchronous relationship between the carbon and osmium cycleses_ES
dc.description.sponsorshipResearch project CGL2014-55274-P), Research Group RNM-200 (Junta de Andalucía), and University of Jaen (FEDER-UJA 1265149).es_ES
dc.identifier.citationMartínez-Rodríguez et al. 2021. Global and Planetary Change, 207:103652es_ES
dc.identifier.issn1872-6364es_ES
dc.identifier.otherhttps://doi.org/10.1016/j.gloplacha.2021.103652es_ES
dc.identifier.urihttps://hdl.handle.net/10953/3283
dc.language.isoenges_ES
dc.publisherElsevieres_ES
dc.relation.ispartofGlobal and Planetary Changees_ES
dc.rightsCC0 1.0 Universal*
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses_ES
dc.rights.urihttp://creativecommons.org/publicdomain/zero/1.0/*
dc.subjectRe-Os isotopeses_ES
dc.subjectOAE 1aes_ES
dc.subjectAptianes_ES
dc.subjectLarge Igneous Provincees_ES
dc.subjectWestern Tethyses_ES
dc.subjectd13Ces_ES
dc.titleTracking magmatism and oceanic change through the early Aptian Anoxic Event (OAE 1a) to the late Aptian: insights from osmium isotopes from the westernmost Tethys (SE Spain) Cau Corees_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.type.versioninfo:eu-repo/semantics/acceptedVersiones_ES

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