Gordeychik, Boris N.

[["dc.bibliographiccitation.firstpage","659"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Contributions to Mineralogy and Petrology"],["dc.bibliographiccitation.lastpage","687"],["dc.bibliographiccitation.volume","159"],["dc.contributor.author","Volynets, Anna O."],["dc.contributor.author","Churikova, Tatiana G."],["dc.contributor.author","Woerner, Gerhard"],["dc.contributor.author","Gordeychik, Boris N."],["dc.contributor.author","Layer, Paul"],["dc.date.accessioned","2018-11-07T08:43:29Z"],["dc.date.available","2018-11-07T08:43:29Z"],["dc.date.issued","2010"],["dc.description.abstract","New (40)Ar/(39)Ar and published (14)C ages constrain voluminous mafic volcanism of the Kamchatka back-arc to Miocene (3-6 Ma) and Late Pleistocene to Holocene (< 1 Ma) times. Trace elements and isotopic compositions show that older rocks derived from a depleted mantle through subduction fluid-flux melting (> 20%). Younger rocks form in a back arc by lower melting degrees involving enriched mantle components. The arc front and Central Kamchatka Depression are also underlain by plateau lavas and shield volcanoes of Late Pleistocene age. The focus of these voluminous eruptions thus migrated in time and may be the result of a high fluid flux in a setting where the Emperor seamount subducts and the slab steepens during rollback during terrain accretions. The northern termination of Holocene volcanism locates the edge of the subducting Pacific plate below Kamchatka, a \"slab-edge-effect\" is not observed in the back arc region."],["dc.identifier.doi","10.1007/s00410-009-0447-9"],["dc.identifier.isi","000276276300004"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?goescholar/4176"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/19974"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0010-7999"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Mafic Late Miocene-Quaternary volcanic rocks in the Kamchatka back arc region: implications for subduction geometry and slab history at the Pacific-Aleutian junction"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["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.artnumber","11775"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Scientific Reports"],["dc.bibliographiccitation.volume","8"],["dc.contributor.author","Gordeychik, Boris N."],["dc.contributor.author","Churikova, Tatiana G."],["dc.contributor.author","Kronz, Andreas"],["dc.contributor.author","Sundermeyer, Caren"],["dc.contributor.author","Simakin, Alexander"],["dc.contributor.author","Wörner, Gerhard"],["dc.date.accessioned","2018-12-18T10:55:41Z"],["dc.date.available","2018-12-18T10:55:41Z"],["dc.date.issued","2018"],["dc.description.abstract","Complex core-rim zoning of Mg-Fe-Ni-Ca-Cr-Al-P in high-Mg olivine crystals from a tuff ring of Shiveluch volcano, Kamchatka, enables reconstruction of the entire olivine crystallization history from mantle conditions to eruption. Bell-shaped Fo86-92 and Ni profiles in crystal cores were formed by diffusion after mixing with evolved magma. Diffusion proceeded to the centres of crystals and completely equilibrated Fo and Ni in some crystals. Diffusion times extracted from Fo and Ni core profiles range from 100 to 2000 days. During subsequent mixing with mafic mantle-equilibrated melt, the cores were partially dissolved and overgrown by Fo90 olivine. Times extracted from Fo and Ni diffusion profiles across the resorption interface between the core and its overgrowth range within 1-10 days, which corresponds to the time of magma ascent to the surface. The overgrowth shows identical smooth Fo-Ni decreasing zoning patterns for all crystals towards the margin, indicating that all crystals shared the same growth history after last mixing event prior to eruption. At the same time, Ca, and to an even greater extent Cr, Al, and P have oscillatory growth patterns in the crystals overgrowth. Our data show that magma ascent can be extremely short during maar/tuff ring eruption."],["dc.identifier.doi","10.1038/s41598-018-30133-1"],["dc.identifier.pmid","30082716"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/15442"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/57129"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.relation.eissn","2045-2322"],["dc.relation.orgunit","Fakultät für Geowissenschaften und Geographie"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0/"],["dc.title","Growth of, and diffusion in, olivine in ultra-fast ascending basalt magmas from Shiveluch volcano"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["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"]]