Ar-40/Ar-39 geochronology, elemental and Sr-Nd-Pb isotope geochemistry of the Neogene bimodal volcanism in the Yilkselen area, NW Konya (Central Anatolia, Turkey)

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dc.contributor.authorKorkmaz, Gulin Gencoglu
dc.contributor.authorAsan, Kursad
dc.contributor.authorKurt, Huseyin
dc.contributor.authorMorgan, Ganerod
dc.date.accessioned2020-03-26T19:33:57Z
dc.date.available2020-03-26T19:33:57Z
dc.date.issued2017
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractBimodal volcanic suites occur in both orogenic and anorogenic geotectonic settings. Although their formation can be attributed to either fractional crystallization from basaltic parents to felsic derivatives or partial melting of different sources, the origin of bimodal suites is still unclear. By reporting mineral chemistry, Ar-40/Ar-39 geochronology, elemental and Sr-Nd-Pb isotope geochemistry data, this study aims to investigate the genesis of bimodal basalt-dacite association from the Ytikselen area located on the northern end of the Sulutas Volcanic Complex (Konya, Central Anatolia). The Ytikselen area volcanic rocks are represented by basaltic lava flows, and dacitic dome with enclaves and pyroclastics. Basaltic flows and pyroclastic rocks are interlayered with the Neogene fluviolacustrine sedimentary units, while dacitic rocks cut the pre-Neogene basement in the area. A biotite separation from dacites yielded Ar-40/Ar-39 plateau age of 16.11 +/- 0.18 Ma. On the other hand, a whole rock sample from basalts gave two plateau ages of 16.45 +/- 0.76 Ma and 22.37 +/- 0.65 Ma for the first steps and next steps, respectively. The investigated basalts are sodic alkaline, and characterized by ocean island basalt (OIB)-like anorogenic geochemical signatures. However, dacites are calc-alkaline and metaluminous, and carry geochemical signatures of orogenic adakites. Sr-Nd-Pb isotopic systematics suggest that the basalts were derived from an asthenospheric mantle source enriched by recycled crustal rocks. The dacites show more enriched Sr and Pb ratios and more depleted Nd ones relative to the basalts, which at the first glance might be attributed to crustal contamination of the associated basalts. However, trace element features of the dacites rule out cogenetic relationship between the two rock types, and point to an origin by melting of lower crust. On the other hand, enclaves share several elemental and isotopic characteristics with the dacites, and appear to be fragments of sub-volcanic intrusions closely related to the dacitic host magma. Based on the obtained geochemical data combined with the published geological and geophysical data, the investigated bimodal volcanic activity can be explained by slab break-off process in the convergence system between the African and Anatolian plates. (C) 2017 Elsevier Ltd. All rights reserved.en_US
dc.description.sponsorshipTurkish Scientific Research Council (TUBITAK-CAYDAG)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [113Y415]en_US
dc.description.sponsorshipSome parts of this study constitute the MSc thesis of the first author. The authors gratefully thank to the Turkish Scientific Research Council (TUBITAK-CAYDAG; Project no: 113Y415) for financial support. We also thank Dr. Anton Eisenhauer for Sr-Nd-Pb isotope analysis (GEOMAR, Germany) and Lang Shi for microprobe analysis (McGill University, Canada). The authors thank Dr. Faruk Aydin (Karadeniz Technical University, Turkey) and Dr. Helve Bellon (University of Brest, IUEM, UMR CNRS "Domaines Oceaniques", France) for their critical and constructive comments, and Dr. Damien Delvaux for editorial handling.en_US
dc.identifier.doi10.1016/j.jafrearsci.2017.02.001en_US
dc.identifier.endpage444en_US
dc.identifier.issn1464-343Xen_US
dc.identifier.issn1879-1956en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage427en_US
dc.identifier.urihttps://dx.doi.org/10.1016/j.jafrearsci.2017.02.001
dc.identifier.urihttps://hdl.handle.net/20.500.12395/34815
dc.identifier.volume129en_US
dc.identifier.wosWOS:000401399100034en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherPERGAMON-ELSEVIER SCIENCE LTDen_US
dc.relation.ispartofJOURNAL OF AFRICAN EARTH SCIENCESen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.selcuk20240510_oaigen_US
dc.subjectBimodal volcanismen_US
dc.subjectBasaltsen_US
dc.subjectDacites with adakitic signatureen_US
dc.subjectKonyaen_US
dc.subjectCentral Anatoliaen_US
dc.subjectTurkeyen_US
dc.subjectMioceneen_US
dc.subjectAr-40-Ar-39 plateau agesen_US
dc.subjectGeochemistry major and trace elements and isotopesen_US
dc.titleAr-40/Ar-39 geochronology, elemental and Sr-Nd-Pb isotope geochemistry of the Neogene bimodal volcanism in the Yilkselen area, NW Konya (Central Anatolia, Turkey)en_US
dc.typeArticleen_US

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