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The unique Cambro-Ordovician silicic large igneous province of NW Gondwana: Catastrophic melting of a thinned crust
dc.contributor.author | Rodriguez Almodóvar, Carmen | |
dc.contributor.author | Castro, Antonio | |
dc.contributor.author | Gómez Frutos, Daniel | |
dc.contributor.author | Gutiérrez Alonso, Gabriel | |
dc.contributor.author | Pereira, M. Francisco | |
dc.contributor.author | Fernández, Carlos | |
dc.date.accessioned | 2022-02-15T11:40:47Z | |
dc.date.available | 2022-02-15T11:40:47Z | |
dc.date.issued | 2022-06 | |
dc.identifier.citation | C. Rodríguez, A. Castro, D. Gómez-Frutos et al. The unique Cambro-Ordovician silicic large igneous province of NW Gondwana: Catastrophic melting of a thinned crust. Gondwana Research 106 (2022) 164–173. [https://doi.org/10.1016/j.gr.2022.01.011] | es_ES |
dc.identifier.uri | http://hdl.handle.net/10481/72840 | |
dc.description | This work was supported through the Spanish Research Agency (AEI) Grant Nº PGC2018-096534-B-I00 (Proyecto IBERCRUST). M.F. P. acknowledges the Portuguese Foundation for Science and Technology (FCT) project UIDB/04683/2020, Instituto de Ciências da Terra. This manuscript was benefit from valuable suggestions from Marcos García-Arias and two anonymous reviewers. | es_ES |
dc.description.abstract | Cambro–Ordovician silicic magmatism in the Central Iberian Zone of the Iberian Massif (Ollo de Sapo Formation, OSF) constitutes a voluminous and geochemically atypical magmatic event that formed preceding the breakup of the northern margin of Gondwana. To date, and due to uncommon geochemical signatures, such as a high Fe, Mg content compared to anatectic melts and the departing from the calc-alkaline trends, the origin of such magmatic event is not fully understood. Herein, we report a data-analysis of geochemistry linking magmas and source compositions. The analysis of the combined data from multiple studies ascribes the geochemistry of the OSF rocks to a combination of extensive melting of Ediacaran metasiliciclastic rocks and a Ca-rich component. It is hypothesized that fluids released by crystallization of mafic magmas contributed to partial melting of a thick metasedimentary pile represented by Ediacaran siliciclastic rocks. Such melting event gave rise to a mobile nebulite or migma, which was able to extrude and form the super-eruption or “flare-up” that characterizes Cambro-Ordovician silicic magmatism at the Gondwana margin. Fast, catastrophic crustal melting with large-scale restite entrainment, triggered by the influx of mafic magma-derived fluids, are considered the main cause of the unique features of this Cambro-Ordovician atypical silicic large igneous province of Gondwana. | es_ES |
dc.description.sponsorship | Instituto de Ciências da Terra | es_ES |
dc.description.sponsorship | Spanish Research Agency | es_ES |
dc.description.sponsorship | Fundação para a Ciência e a Tecnologia | es_ES |
dc.description.sponsorship | Fundació Catalana de Trasplantament UIDB/04683/2020 | es_ES |
dc.description.sponsorship | Agencia Estatal de Investigación PGC2018-096534-B-I00 | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | Elsevier | es_ES |
dc.rights | Atribución-NoComercial-SinDerivadas 3.0 España | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ | * |
dc.subject | Cambro-Ordovician magmatism | es_ES |
dc.subject | Ollo de Sapo Formation | es_ES |
dc.subject | Data-analysis | es_ES |
dc.subject | Geochemical modelling | es_ES |
dc.subject | Extensive crustal melting | es_ES |
dc.title | The unique Cambro-Ordovician silicic large igneous province of NW Gondwana: Catastrophic melting of a thinned crust | es_ES |
dc.type | journal article | es_ES |
dc.rights.accessRights | open access | es_ES |
dc.identifier.doi | 10.1016/j.gr.2022.01.011 | |
dc.type.hasVersion | VoR | es_ES |