Slab decarbonation and CO2 recycling in the Southwestern Colombian volcanic arc

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dc.citation.journalTitleGEOCHIMICA ET COSMOCHIMICA ACTA
dc.contributor.authorMarin-Ceron, Maria I.
dc.contributor.authorMoriguti, Takuya
dc.contributor.authorMakishima, Akio
dc.contributor.authorNakamura, Eizo
dc.contributor.departmentUniversidad EAFIT. Departamento de Cienciasspa
dc.contributor.researchgroupGeología Ambiental y Tectónicaspa
dc.creatorMarin-Ceron, Maria I.
dc.creatorMoriguti, Takuya
dc.creatorMakishima, Akio
dc.creatorNakamura, Eizo
dc.date.accessioned2021-03-26T21:25:54Z
dc.date.available2021-03-26T21:25:54Z
dc.date.issued2010-02-01
dc.description.abstractThe contribution of subducted carbonate sediments to the genesis of the Southwestern Colombian arc magmas was investigated using a comprehensive petrography and geochemical analysis, including determination of major and trace element contents and Sr, Nd, Hf and Pb isotope compositions. These data have been used to constrain the depth of decarbonation in the subducted slab, indicating that the decarbonation process continues into the sub-arc region, and ultimately becomes negligible in the rear arc. We propose on the basis of multi-isotope approach and mass balance calculations, that the most important mechanism to induce the slab decarbonation is the infiltration of chemically reactive aqueous fluids from the altered oceanic crust, which decreasingly metasomatize the mantle wedge, triggering the formation of isotopically different primary magmas from the volcanic front (VF) with relatively high Hf-176/Hf-177, high Sr-87/Sr-86, negative values of epsilon Nd and lower Pb isotopes compared to the rear arc (RA). The presence of more aqueous fluids at the volcanic front may increase the degree of decarbonation into carbonate-bearing lithologies. Moreover, with increasing pressure and temperature in the subduction system, the decrease in dehydration of the slab, leads to cessation of fluid-induced decarbonation reactions at the rear arc. This development allows the remaining carbonate materials to be recycled into the deep mantle. (C) 2009 Elsevier Ltd. All rights reserved.eng
dc.identifierhttps://eafit.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=1425
dc.identifier.doi10.1016/j.gca.2009.10.031
dc.identifier.issn00167037
dc.identifier.issn18729533
dc.identifier.otherWOS;000273781100020
dc.identifier.urihttp://hdl.handle.net/10784/27224
dc.languageeng
dc.language.isoengeng
dc.publisherPERGAMON-ELSEVIER SCIENCE LTD
dc.rightshttps://v2.sherpa.ac.uk/id/publication/issn/0016-7037
dc.sourceGEOCHIMICA ET COSMOCHIMICA ACTA
dc.subjectIONIZATION MASS-SPECTROMETRYeng
dc.subjectCARBONATE-BEARING ECLOGITEeng
dc.subjectMC-ICP-MSeng
dc.subjectISOTOPE GEOCHEMISTRYeng
dc.subjectLEAD-ISOTOPEeng
dc.subjectCOSTA-RICAeng
dc.subjectMETAMORPHIC DEVOLATILIZATIONeng
dc.subjectREGIONAL-VARIATIONSeng
dc.subjectPELAGIC SEDIMENTSeng
dc.subjectFLUID COMPOSITIONeng
dc.titleSlab decarbonation and CO2 recycling in the Southwestern Colombian volcanic arceng
dc.typearticleeng
dc.typeinfo:eu-repo/semantics/articleeng
dc.typeinfo:eu-repo/semantics/publishedVersioneng
dc.typepublishedVersioneng
dc.type.localArtículospa

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