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Zircon U–Pb ages and geochemistry of granitoid from the southwest part of the Taşlıçay batholith: Implications for Neotethyan closure in Eastern Anatolia, Turkey

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Abstract

The composite Taşlıçay batholith that is located in the Eastern Anatolian Accretionary Complex (EAAC) includes I- and S-type granitoid rocks. This batholith occurred as a result of the collision between Arabian and Eurasian plates along the Bitlis–Zagros suture zone during the Early Miocene (Burdigalian). This paper presents new whole rock geochemical and zircon U–Pb geochronological data from the southwest part of Taşlıçay batholith. The study area contains S-type granitoids such as tonalite, granodiorite, monzogranite, and granite. These rocks are characterized by enrichments in large ion lithophile elements (LILEs) (Cs, Ba, Rb, K) and light rare earth elements (LREEs), and depletions in high field strength elements (HFSEs) (Nb, P, Ti). They contain a number of mafic microgranular enclaves (MMEs) that are quartz microdiorite in composition. Aluminium Saturation Index (ASI) and CIPW normative corundum values of these granitoids vary between 0.98 and 1.22 and 0.06–1.55%, respectively. The zircon U–Pb ages of the studied granitoids range between 19.8 and 20.0 Ma. Considering all geological, geochemical and geochronological data, we suggest that S-type granitoids from the southwest part of Taşlıçay batholith were formed with assimilation fractional crystallization (AFC) from a hybrid magma source in a syn-collisional (Arabian–Eurasian collision) tectonic environment.

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Acknowledgements

The authors would like to thank Tamer Rızaoğlu and Ze Liu for their help in zircon U–Pb dating. This research has been funded by Scientific Research Projects Office of Van Yüzüncü Yıl University–Van/Turkey (YYU–BAP, Project No: 2010–YL 145).

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  1. Department of Geological Engineering, Van Yüzüncü Yıl University, 65080, Tuşba, Van, Turkey

    Mustafa Açlan & İnci Kibariye Turgut

  2. Institute of Natural and Applied Sciences, Van Yüzüncü Yıl University, 65080, Tuşba, Van, Turkey

    İnci Kibariye Turgut

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Açlan, M., Turgut, İ.K. Zircon U–Pb ages and geochemistry of granitoid from the southwest part of the Taşlıçay batholith: Implications for Neotethyan closure in Eastern Anatolia, Turkey. J Earth Syst Sci 129, 183 (2020). https://doi.org/10.1007/s12040-020-01445-6

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