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.

中文翻译：

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Taşlıçay岩床西南部的锆石U–Pb年龄和花岗岩的地球化学：对土耳其安那托利亚东部新特提斯封岩的影响

位于东安纳托利亚增生复合体（EAAC）中的Taşlıçay复合岩基包括I型和S型花岗岩。该岩基是由于中新世早期（布尔迪加利安）沿Bitlis-Zagros缝合带的阿拉伯板块与欧亚板块之间的碰撞而发生的。本文介绍了Taşlıçay岩床西南部的新的完整岩石地球化学和锆石U–Pb年代学数据。研究区域包含S型花岗岩，如方钠石，花岗闪长岩，褐铁矿和花岗岩。这些岩石的特征是富集了大型离子亲石元素（LILE）（Cs，Ba，Rb，K）和轻稀土元素（LREEs），以及高场强元素（HFSEs）（Nb，P，Ti）枯竭。它们包含大量的镁铁质微晶飞地（MME），其成分为石英微闪长岩。这些花岗岩的铝饱和指数（ASI）和CIPW规范刚玉值分别在0.98和1.22和0.06-1.5％之间变化。研究的花岗岩类的锆石U–Pb年龄在19.8至20.0 Ma之间。考虑到所有地质，地球化学和地球年代学数据，我们认为塔什利切岩床西南部的S型花岗岩是在同碰撞（阿拉伯－欧亚碰撞）构造环境中与混合岩浆源同化分步结晶（AFC）形成的。 。