Gordeychik, Boris N.

[["dc.bibliographiccitation.artnumber","egac087"],["dc.bibliographiccitation.issue","9"],["dc.bibliographiccitation.journal","Journal of Petrology"],["dc.bibliographiccitation.volume","63"],["dc.contributor.author","Iveson, Alexander A"],["dc.contributor.author","Humphreys, Madeleine C S"],["dc.contributor.author","Jenner, Frances E"],["dc.contributor.author","Kunz, Barbara E"],["dc.contributor.author","Savov, Ivan P"],["dc.contributor.author","De Hoog, Jan C M"],["dc.contributor.author","Churikova, Tatiana G"],["dc.contributor.author","Gordeychik, Boris N"],["dc.contributor.author","Hammond, Samantha J"],["dc.contributor.author","Plechov, Pavel Yu"],["dc.contributor.author","Agostini, Samuele"],["dc.date.accessioned","2022-11-01T10:16:56Z"],["dc.date.available","2022-11-01T10:16:56Z"],["dc.date.issued","2022"],["dc.description.abstract","Abstract\n Melt storage and supply beneath arc volcanoes may be distributed between a central stratovolcano and wider fields of monogenetic cones, indicating complex shallow plumbing systems. However, the impact of such spatially variable magma storage conditions on volatile degassing and trace element geochemistry is unclear. This study explores magma generation and storage processes beneath the Tolbachik volcanic field, Kamchatka, Russia, in order to investigate the evolution of the magmatic volatile phase and, specifically, the strong enrichment of chalcophile metals (in particular, Cu) in this system. We present new geochemical data for a large suite of olivine- and clinopyroxene-hosted melt inclusions (and host phenocrysts) from five separate monogenetic cones within the Tolbachik volcanic field. These high-Al composition magmas likely reflect the homogenised fractionation products of primitive intermediate-Mg melt compositions, stored at shallow depths after significant fractional crystallisation. Boron isotope compositions and incompatible trace element ratios of the melt inclusions suggest a deeper plumbing system that is dominated by extensive fractional crystallisation and fed by melts derived from an isotopically homogeneous parental magma composition. Volatile components (H2O, CO2, S, Cl, F) show that magmas feeding different monogenetic cones had variable initial volatile contents and subsequently experienced different fluid-saturated storage conditions and degassing histories. We also show that melts supplying the Tolbachik volcanic field are strongly enriched in Cu compared with almost all other Kamchatka rocks, including samples from the Tolbachik central stratocones, and other volcanoes situated in close proximity in the Central Kamchatka Depression. The melt inclusions record Cu concentrations ≥450 μg/g at ca. 4–5 wt.% MgO, which can only be explained by bulk incompatible partitioning behaviour of Cu, i.e. evolution under sulphide-undersaturated conditions. We suggest that initial mantle melting in this region exhausted mantle sulphides, leading to sulphide undersaturated primitive melts. This sulphide-free model for the high-Al cone melts is further supported by S/Se and Cu/Ag values that overlap those of the primitive mantle and MORB array, with bulk rock Cu/Ag ratios also overlapping other with other global arc datasets for magma evolution prior to fractionation of a monosulfide solid solution. We therefore demonstrate that the combination of novel chalcophile metal analyses with trace element, isotopic, and volatile data is a powerful tool for deciphering complex magmatic evolution conditions across the entire volcanic field."],["dc.identifier.doi","10.1093/petrology/egac087"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/116693"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-605"],["dc.relation.eissn","1460-2415"],["dc.relation.issn","0022-3530"],["dc.title","Tracing Volatiles, Halogens, and Chalcophile Metals during Melt Evolution at the Tolbachik Monogenetic Field, Kamchatka"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Contributions to Mineralogy and Petrology"],["dc.bibliographiccitation.volume","175"],["dc.contributor.author","Sundermeyer, Caren"],["dc.contributor.author","Di Muro, Andrea"],["dc.contributor.author","Gordeychik, Boris"],["dc.contributor.author","Wörner, Gerhard"],["dc.date.accessioned","2020-12-10T14:10:33Z"],["dc.date.available","2020-12-10T14:10:33Z"],["dc.date.issued","2019"],["dc.identifier.doi","10.1007/s00410-019-1642-y"],["dc.identifier.eissn","1432-0967"],["dc.identifier.issn","0010-7999"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/70795"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Timescales of magmatic processes during the eruptive cycle 2014–2015 at Piton de la Fournaise, La Réunion, obtained from Mg–Fe diffusion modelling in olivine"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","3"],["dc.bibliographiccitation.journal","Journal of Volcanology and Geothermal Research"],["dc.bibliographiccitation.lastpage","21"],["dc.bibliographiccitation.volume","263"],["dc.contributor.author","Churikova, Tatiana G."],["dc.contributor.author","Gordeychik, Boris N."],["dc.contributor.author","Ivanov, Boris V."],["dc.contributor.author","Woerner, Gerhard"],["dc.date.accessioned","2018-11-07T09:21:39Z"],["dc.date.available","2018-11-07T09:21:39Z"],["dc.date.issued","2013"],["dc.description.abstract","Data on the geology, petrography, mineralogy, and geochemistry of rocks from Kamen Volcano (Central Kamchatka Depression) are presented and compared with rocks from the neighbouring active volcanoes. The rocks from Kamen and Ploskie Sopky volcanoes differ systematically in major elemental and mineral compositions and could not have been produced from the same primary melts. The compositional trends of Kamen stratovolcano lavas and dikes are clearly distinct from those of Klyuchevskoy lavas in all major and trace element diagrams as well as in mineral composition. However, lavas of the monogenetic cones on the southwestern slope of Kamen Volcano are similar to the moderately high-Mg basalts from Klyuchevskoy and may have been derived from the same primary melts. This means that the monogenetic cones of Kamen Volcano represent the feeding magma for Klyuchevskoy Volcano. Rocks from Kamen stratovolcano and Bezymianny form a common trend on all major element diagrams, indicating their genetic proximity. This suggests that Bezymianny Volcano inherited the feeding magma system of extinct Kamen Volcano. The observed geochemical diversity of rocks from the Klyuchevskaya group of volcanoes can be explained as the result of both gradual depletion over time of the mantle N-MORB-type source due to the intense previous magmatic events in this area, and the addition of distinct fluids to this mantle source. (C) 2013 Elsevier B.V. All rights reserved."],["dc.description.sponsorship","NSF; Russian Foundation for Basic Research [08-05-00600]"],["dc.identifier.doi","10.1016/j.jvolgeores.2013.01.019"],["dc.identifier.isi","000326365600002"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/29159"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.relation.issn","1872-6097"],["dc.relation.issn","0377-0273"],["dc.title","Relationship between Kamen Volcano and the Klyuchevskaya group of volcanoes (Kamchatka)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","116848"],["dc.bibliographiccitation.journal","Earth and Planetary Science Letters"],["dc.bibliographiccitation.volume","562"],["dc.contributor.author","Iveson, Alexander A."],["dc.contributor.author","Humphreys, Madeleine C.S."],["dc.contributor.author","Savov, Ivan P."],["dc.contributor.author","de Hoog, Jan C.M."],["dc.contributor.author","Turner, Stephen J."],["dc.contributor.author","Churikova, Tatiana G."],["dc.contributor.author","Macpherson, Colin. G."],["dc.contributor.author","Mather, Tamsin A."],["dc.contributor.author","Gordeychik, Boris N."],["dc.contributor.author","Cooper, George F."],["dc.date.accessioned","2021-06-01T09:41:18Z"],["dc.date.available","2021-06-01T09:41:18Z"],["dc.date.issued","2021"],["dc.identifier.doi","10.1016/j.epsl.2021.116848"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/84873"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-425"],["dc.relation.issn","0012-821X"],["dc.title","Deciphering variable mantle sources and hydrous inputs to arc magmas in Kamchatka"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","9"],["dc.bibliographiccitation.journal","Journal of Petrology"],["dc.bibliographiccitation.volume","61"],["dc.contributor.author","Gordeychik, Boris"],["dc.contributor.author","Churikova, Tatiana"],["dc.contributor.author","Shea, Thomas"],["dc.contributor.author","Kronz, Andreas"],["dc.contributor.author","Simakin, Alexander"],["dc.contributor.author","Wörner, Gerhard"],["dc.date.accessioned","2021-06-01T09:41:56Z"],["dc.date.available","2021-06-01T09:41:56Z"],["dc.date.issued","2020"],["dc.description.abstract","Abstract Nickel is a strongly compatible element in olivine, and thus fractional crystallization of olivine typically results in a concave-up trend on a Fo–Ni diagram. ‘Ni-enriched’ olivine compositions are considered those that fall above such a crystallization trend. To explain Ni-enriched olivine crystals, we develop a set of theoretical and computational models to describe how primitive olivine phenocrysts from a parent (high-Mg, high-Ni) basalt re-equilibrate with an evolved (low-Mg, low-Ni) melt through diffusion. These models describe the progressive loss of Fo and Ni in olivine cores during protracted diffusion for various crystal shapes and different relative diffusivities for Ni and Fe–Mg. In the case when the diffusivity of Ni is lower than that for Fe–Mg interdiffusion, then olivine phenocrysts affected by protracted diffusion form a concave-down trend that contrasts with the concave-up crystallization trend. Models for different simple geometries show that the concavity of the diffusion trend does not depend on the size of the crystals and only weakly depends on their shape. We also find that the effect of diffusion anisotropy on trend concavity is of the same magnitude as the effect of crystal shape. Thus, both diffusion anisotropy and crystal shape do not significantly change the concave-down diffusion trend. Three-dimensional numerical diffusion models using a range of more complex, realistic olivine morphologies with anisotropy corroborate this conclusion. Thus, the curvature of the concave-down diffusion trend is mainly determined by the ratio of Ni and Fe–Mg diffusion coefficients. The initial and final points of the diffusion trend are in turn determined by the compositional contrast between mafic and more evolved melts that have mixed to cause disequilibrium between olivine cores and surrounding melt. We present several examples of measurements on olivine from arc basalts from Kamchatka, and published olivine datasets from mafic magmas from non-subduction settings (lamproites and kimberlites) that are consistent with diffusion-controlled Fo–Ni behaviour. In each case the ratio of Ni and Fe–Mg diffusion coefficients is indicated to be <1. These examples show that crystallization and diffusion can be distinguished by concave-up and concave-down trends in Fo–Ni diagrams."],["dc.identifier.doi","10.1093/petrology/egaa083"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/85081"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-425"],["dc.relation.eissn","1460-2415"],["dc.title","Fo and Ni Relations in Olivine Differentiate between Crystallization and Diffusion Trends"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","212"],["dc.bibliographiccitation.journal","Lithos"],["dc.bibliographiccitation.lastpage","224"],["dc.bibliographiccitation.volume","322"],["dc.contributor.author","Nekrylov, Nikolai"],["dc.contributor.author","Portnyagin, Maxim V."],["dc.contributor.author","Kamenetsky, Vadim S."],["dc.contributor.author","Mironov, Nikita L."],["dc.contributor.author","Churikova, Tatiana G."],["dc.contributor.author","Plechov, Pavel Yu."],["dc.contributor.author","Abersteiner, Adam"],["dc.contributor.author","Gorbach, Natalia V."],["dc.contributor.author","Gordeychik, Boris N."],["dc.contributor.author","Krasheninnikov, Stepan P."],["dc.contributor.author","Tobelko, Daria P."],["dc.contributor.author","Shur, Maria Yu."],["dc.contributor.author","Tetroeva, Sofia A."],["dc.contributor.author","Volynets, Anna O."],["dc.contributor.author","Hoernle, Kaj"],["dc.contributor.author","Wörner, Gerhard"],["dc.date.accessioned","2020-12-10T15:20:17Z"],["dc.date.available","2020-12-10T15:20:17Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1016/j.lithos.2018.10.011"],["dc.identifier.issn","0024-4937"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/72608"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Chromium spinel in Late Quaternary volcanic rocks from Kamchatka: Implications for spatial compositional variability of subarc mantle and its oxidation state"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]