The Eastern Sakarya Zone in northeastern Turkey contributes for a natural laboratory to study subduction- to collision-related intrusive rocks. This paper presents data on a Carboniferous-aged Duzkoy pluton containing mainly peraluminous granitoids. In addition to plagioclase, K-feldspar and quartz, the rocks include biotite, zircon, apatite and opaque minerals. Sericitization, chloritization, epidotization, and carbonatization are the main alteration types. The rocks display generally enrichment in large-ion lithophile elements (Rb, Th, U, K), and depletion in high field strength elements (Sr, Nb, Ta, P) in the primitive mantle-normalized trace element diagrams. The Duzkoy samples show mainly light rare earth elements-enriched patterns with marked negative Eu anomalies in the chondrite-normalized rare earth elements diagrams. The compositions of the Duzkoy plutonic rocks are consistent with their origin via partial melting of amphibolites or metagreywackes. Crystal fractionation is also likely an important process in the formation of these rocks. The origin of these rocks could be related to the delamination or slab breakoff processes during the Variscan orogeny.

土耳其东北部的 Eastern Sakarya Zone 为研究俯冲到碰撞相关侵入岩的自然实验室做出了贡献。本文介绍了主要含有过铝质花岗岩的石炭纪 Duzkoy 深成岩的数据。除斜长石、钾长石和石英外，岩石中还包括黑云母、锆石、磷灰石和不透明矿物。绢云母化、绿泥石化、表石化和碳酸盐化是主要的蚀变类型。在原始地幔归一化微量元素图中，岩石普遍富集大离子亲石元素（Rb、Th、U、K），亏损高场强元素（Sr、Nb、Ta、P）。Duzkoy 样品主要显示轻稀土元素富集模式，在球粒陨石归一化稀土元素图中具有明显的负 Eu 异常。Duzkoy 深成岩的成分与其起源一致，通过角闪岩或变杂砂岩的部分熔化。晶体分馏也可能是这些岩石形成过程中的一个重要过程。这些岩石的起源可能与华力斯坎造山运动期间的分层或板片断裂过程有关。