Geochemistry and Petrogenesis of the Eastern Pontide Volcanic Rocks, Northeast Turkey

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dc.contributor.authorArslan, M.
dc.contributor.authorTüysüz, N.
dc.contributor.authorKorkmaz, S.
dc.contributor.authorKurt, H.
dc.date.accessioned2020-03-26T16:25:34Z
dc.date.available2020-03-26T16:25:34Z
dc.date.issued1997
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractThe eastern Pontides are characterized by three volcanic cycles erupted in Liassic, Upper Cretaceous and Eocene times. Volcanic rocks of Liassic age are transitional, those of Upper Cretaceous age are subalkaline, and Eocene volcanic rocks are alkaline around Trabzon and Tonya, but subalkaline in the south of Gümüşhane. Geochemical variations indicate that fractional crystallization played a significant role in the evolution of more differentiated rocks, especially in Liassic and Upper Cretaceous volcanic rocks. Fractionation of olivine, clinopyroxene and plagioclase was the major control in the evolution of Liassic volcanic rocks, whereas fractionation of plagioclase and clinopyroxene dominated in the Upper Cretaceous volcanic rocks. Liassic volcanics show high to low pressure fractionation but Upper Cretaceous volcanic rocks low pressure fractionation. Eocene volcanic rocks from Tonya exhibit high to low pressure whereas those from Trabzon low pressure fractionation. The volcanic rocks were possibly derived from a tholeitic to an E-type MORB source. The Eocene volcanic rocks around Trabzon have very high LILE and LREE concentrations compared to those of Tonya. This may be due to varying degrees of partial melting from a common source. The trace element patterns of Liassic volcanic rocks are very consistent with those of withinplate tholeites, suggesting that the Liassic volcanic rocks developed under an extentional regime, possibly related to rifting. However, Upper Cretaceous volcanic rocks are best represented by island-arc calcalkaline, and Eocene volcanic rocks by within-plate alkaline patterns. Hence, it may be implied that the subduction began in the Liassic after rifting, continued in the Upper Cretaceous and reached maturity with crustal thickening in the Eocene. These geochemical data together with geological data indicate an island arc setting for the Eastern Pontide volcanic rocks.en_US
dc.identifier.citationArslan, M., Tüysüz, N., Korkmaz, S., Kurt, H., (1997). Geochemistry and Petrogenesis of the Eastern Pontide Volcanic Rocks, Northeast Turkey. Chemie der Erde, 57, 157-187.
dc.identifier.endpage187en_US
dc.identifier.issn0009-2819en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage157en_US
dc.identifier.urihttps://hdl.handle.net/20.500.12395/16626
dc.identifier.volume57en_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorKurt, H.
dc.language.isoenen_US
dc.publisherElsevier GmbHen_US
dc.relation.ispartofChemie der Erdeen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.selcuk20240510_oaigen_US
dc.titleGeochemistry and Petrogenesis of the Eastern Pontide Volcanic Rocks, Northeast Turkeyen_US
dc.typeArticleen_US

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