Continuous eclogite melting and variable refertilisation in upwelling heterogeneous mantle

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dc.contributor.authorRosenthal, A.
dc.contributor.authorYaxley, G.M.
dc.contributor.authorGreen, D.H.
dc.contributor.authorHermann, J.
dc.contributor.authorKovács, I.
dc.contributor.authorSpandler, C.
dc.date.issued2014
dc.description.abstractLarge-scale tectonic processes introduce a range of crustal lithologies into the Earth's mantle. These lithologies have been implicated as sources of compositional heterogeneity in mantle-derived magmas. The model being explored here assumes the presence of widely dispersed fragments of residual eclogite (derived from recycled oceanic crust), stretched and stirred by convection in the mantle. Here we show with an experimental study that these residual eclogites continuously melt during upwelling of such heterogeneous mantle and we characterize the melting reactions and compositional changes in the residue minerals. The chemical exchange between these partial melts and more refractory peridotite leads to a variably metasomatised mantle. Re-melting of these metasomatised peridotite lithologies at given pressures and temperatures results in diverse melt compositions, which may contribute to the observed heterogeneity of oceanic basalt suites. We also show that heterogeneous upwelling mantle is subject to diverse local freezing, hybridization and carbonate-carbon-silicate redox reactions along a mantle adiabat.
dc.description.statementofresponsibilityAnja Rosenthal, Gregory M. Yaxley, David H. Green, Joerg Hermann, István Kovács and Carl Spandler
dc.identifier.citationScientific Reports, 2014; 4(1):6099-1-6099-6
dc.identifier.doi10.1038/srep06099
dc.identifier.issn2045-2322
dc.identifier.issn2045-2322
dc.identifier.orcidSpandler, C. [0000-0003-2310-0517]
dc.identifier.urihttp://hdl.handle.net/2440/125957
dc.language.isoen
dc.publisherNature Publishing Group
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.source.urihttps://doi.org/10.1038/srep06099
dc.subjectClimate and Earth system modelling; geochemistry; petrology; volcanology
dc.titleContinuous eclogite melting and variable refertilisation in upwelling heterogeneous mantle
dc.typeJournal article
pubs.publication-statusPublished

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