Gordeychik, Boris N.

[["dc.bibliographiccitation.firstpage","517"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Geology"],["dc.bibliographiccitation.lastpage","521"],["dc.bibliographiccitation.volume","47"],["dc.contributor.author","Tomanikova, Lubomira"],["dc.contributor.author","Savov, Ivan P."],["dc.contributor.author","Harvey, Jason"],["dc.contributor.author","de Hoog, Jan C.M."],["dc.contributor.author","Churikova, Tatiana G."],["dc.contributor.author","Yogodzinski, Gene M."],["dc.contributor.author","Gordeychik, Boris N."],["dc.date.accessioned","2020-12-10T18:37:08Z"],["dc.date.available","2020-12-10T18:37:08Z"],["dc.date.issued","2019"],["dc.description.abstract","Metasomatized subarc mantle is often regarded as one of the mantle reservoirs enriched in fluid-mobile elements (FMEs; e.g., B, Li, Cs, As, Sb, Ba, Rb, Pb), which, when subject to wet melting, will contribute to the characteristic FME-rich signature of arc volcanic rocks. Evidence of wet melts in the subarc mantle wedge is recorded in metasomatic amphibole-, phlogopite-, and pyroxene-bearing veins in ultramafic xenoliths recovered from arc volcanoes. Our new B and δ11B study of such veins in mantle xenoliths from Avachinsky and Shiveluch volcanoes, Kamchatka arc, indicates that slab-derived FMEs, including B and its characteristically high δ11B, are delivered directly to a melt that experiences limited interaction with the surrounding mantle before eruption. The exceptionally low B contents (from 0.2 to 3.1 μg g–1) and low δ11B (from –16.6‰ to +0.9‰) of mantle xenolith vein minerals are, instead, products of fluids and melts released from the isotopically light subducted and dehydrated altered oceanic crust and, to a lesser extent, from isotopically heavy serpentinite. Therefore, melting of amphibole- and phlogopite-bearing veins in a metasomatized mantle wedge cannot alone produce the characteristic FME geochemistry of arc volcanic rocks, which require a comparatively large, isotopically heavy and B-rich serpentinite-derived fluid component in their source"],["dc.identifier.doi","10.1130/G46092.1"],["dc.identifier.issn","0091-7613"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16295"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/76851"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.intern","Merged from goescholar"],["dc.relation.issn","0091-7613"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","A limited role for metasomatized subarc mantle in the generation of boron isotope signatures of arc volcanic rocks"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]