Mineralogy, geochemistry, and Sr-Nd isotopes of the Cretaceous leucogranite from Karamadaz (Kayseri), central Turkey: implications for their sources and geological setting

Basit Öğe Kaydı
dc.contributor.authorKocak, Kerim
dc.date.accessioned2020-03-26T17:27:15Z
dc.date.available2020-03-26T17:27:15Z
dc.date.issued2008
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractThe leucogranite is the major constituent of the bimodal Late Cretaceous Karamadaz granitoid, developed in relation with evolution of the Inner Tauride Ocean along the northern margin of the Taurides in central Turkey. New analyses of minerals major and trace elements (including rare-earth elements (REE)), and of Sr and Nd isotopes are performed to determine the origin and geochemical characteristics of the leucogranites. Medium-coarse-grained leucogranite contains normally zoned plagioclase (An(12-20)), mildly alkaline biotite, and xenocrystic magneziohornblende, actinolite, and ferrohornblende. It is characterized by concave-up REE patterns with respect to middle-heavy REE. Field relations, mineral chemistry, geochemical data, and isotopic data suggest that the leucogranite could have originated from an amphibole-bearing igneous source in lower to middle crust by low-rate partial melting (< 40%) under low pressure and low H2O activity conditions, possibly coupled by mixing-mingling with mafic magma and high-level feldspar and minor biotite fractionation. In contrast, the quartz diorite and mafic microgranular enclave (MME) are probably developed from an enriched mantle, with possible mingling-mixing. MME, quartz diorite, and leucogranite may represent a magmatic suite, which formed in an extensional tectonic regime by bimodal magmatic activity probably because of lithospheric delamination or slab break off or after the Alpine thicken within the Gondwanan Tauride-Anatolide platform. Initial Sr data exhibit an age of 65 +/- 13 Ma for the leucogranite, but it does not indicate a true intrusion age of the magma due to isotopic modification of the magma.en_US
dc.description.sponsorshipSclcuk University (Konya-Turkey)Selcuk Universityen_US
dc.description.sponsorshipI offer my thanks to the Sclcuk University (Konya-Turkey) Scientific Research Fund for its support. J.J. Peucat is gratefully acknowledged for his comments on the isotopic data. Thoughtful reviews by Robert Kerrich and an anonymous reviewer were most helpful in improving the manuscript.en_US
dc.identifier.doi10.1139/E08-040en_US
dc.identifier.endpage968en_US
dc.identifier.issn0008-4077en_US
dc.identifier.issn1480-3313en_US
dc.identifier.issue8en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage949en_US
dc.identifier.urihttps://dx.doi.org/10.1139/E08-040
dc.identifier.urihttps://hdl.handle.net/20.500.12395/22515
dc.identifier.volume45en_US
dc.identifier.wosWOS:000259879400006en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherCANADIAN SCIENCE PUBLISHINGen_US
dc.relation.ispartofCANADIAN JOURNAL OF EARTH SCIENCESen_US
dc.relation.publicationcategoryDiğeren_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.selcuk20240510_oaigen_US
dc.titleMineralogy, geochemistry, and Sr-Nd isotopes of the Cretaceous leucogranite from Karamadaz (Kayseri), central Turkey: implications for their sources and geological settingen_US
dc.typeReviewen_US

Dosyalar

Koleksiyon

WoS İndeksli Yayınlar Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu