The Neogene–Quaternary volcanic products, related to Arabian and Anatolian Plate collision along the Bitlis Suture Zone, cover wide areas on both plates. One of these volcanic exposures on the Arabian Plate is the Kepez volcanic complex (KVC). This study aims explain to petrogenesis of KVC. Although some examples display alkaline affinities, the majority of the volcanic rock is calc-alkaline and can be defined in three main groups. 40Ar/39Ar data obtained from dacite, basalt and andesite rock groups within the KVC yield ages of between 13.5 and 15.5 Ma. Geochemical and petrographical data show that the andesitic rocks are products of homogeneous mixing between basic end-member magmas and dacitic magmas which are the products of partial melting of lower crustal compositions. Basaltic products of KVC are asthenospheric mantle derived, while dacitic and andesitic volcanic rocks are crustal origin. High Sr and Nd isotope ratios may indicate that andesitic and dacitic rocks originated from continental crust. The lithospheric mantle, which is subducting underneath the Anatolian plate, must have experienced slab break-off processes 13–15 million years ago and sunk into the asthenosphere. KVC were produced with the collision between Arabian and Anatolian Plates and related uplift of the East Anatolia region.

中文翻译：

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东安纳托利亚的碰撞相关板块断裂火山活动，凯佩斯火山复合体（土耳其）

与沿比特利斯缝合带的阿拉伯和安纳托利亚板块碰撞有关的新第三纪-第四纪火山产物覆盖了两个板块的广阔区域。阿拉伯板块上的这些火山暴露之一是凯佩斯火山复合体（KVC）。本研究旨在解释KVC的成岩作用。虽然一些例子显示碱性亲和力，但大多数火山岩是钙碱性的，可以分为三大类。从 13.5 到 15.5 Ma 之间的 KVC 屈服年龄内英安岩、玄武岩和安山岩组获得的 40Ar/39Ar 数据。地球化学和岩相资料表明，安山岩是基性端元岩浆与英安质岩浆均匀混合的产物，后者是下地壳成分部分熔融的产物。KVC玄武岩产物是软流圈地幔衍生的，而英安质和安山质火山岩是地壳成因。高 Sr 和 Nd 同位素比率可能表明安山岩和英安岩起源于大陆地壳。在安纳托利亚板块下方俯冲的岩石圈地幔一定在 13-1500 万年前经历了板块断裂过程并沉入软流圈。KVC产生于阿拉伯板块与安纳托利亚板块的碰撞以及东安纳托利亚地区的相关隆升。