As a part of the Kermanshah ophiolite in western Iran, the Cretaceous Nourabad-Dinavar ophiolitic complex is a remnant of the Neo-Tethys oceanic lithosphere and represents transitional mantle-crust and upper crust units in the Nourabad and Dinavar regions, respectively. All the units were affected by the two metamorphic regimes of static metamorphism and dynamic metamorphism. The whole-rock chemical data of the basic samples (i.e. gabbros, basalts, and dykes) show that they are related to the island-arc regime. The main reasons for this conclusion are as follows: their affinity with the calc-alkaline series, LREE enrichment, and subduction-related proxies such as the negative anomalies of Nb, Ta, Zr, and Hf and the positive anomaly of Th. On the other hand, the mineral chemistry analysis confirms that the studied ophiolitic complex is a MORB-type ophiolite emplaced in the supra-subduction zone. This is supported by mineralogical evidence including the compositional dependence of olivines (fo_90-91) on the spinel peridotite mantle facies, spinel minerals (Al-chromite and Mg/Cr-bearing hercynite), and Mg-rich orthopyroxenes (enstatite) in the harzburgites. The geochemical modeling implies that this complex evolved through the following successive magmatic steps: 1) the partial melting of a mixed NMORB-EMORB (50:50) source producing spinel harzburgite residues; 2) the fractional crystallization of the basic partial melts during their ascent to the surface and the formation of gabbro bodies; 3) the assimilation and fractional crystallization process as the NMORB components re-enter the chamber and produce basic pillow lavas, lava flows, and some fine-grained gabbro bodies (i.e. dykes). Accordingly, it can be interpreted that the emplacement history of the studied ophiolite succession has two stages: 1) an obduction stage in the Campanian; 2) an exhumation stage in the post-Cretaceous.

作为伊朗西部 Kermanshah 蛇绿岩的一部分，白垩纪 Nourabad-Dinavar 蛇绿岩杂岩是新特提斯大洋岩石圈的残余，分别代表 Nourabad 和 Dinavar 地区的过渡地幔-地壳和上地壳单元。所有单元都受到静态变质作用和动态变质作用两种变质作用的影响。基本样品（即辉长岩、玄武岩和岩脉）的全岩化学数据表明它们与岛弧体系有关。得出这一结论的主要原因如下：它们与钙碱性系列的亲和性、LREE 富集以及与俯冲相关的指标，如 Nb、Ta、Zr 和 Hf 的负异常和 Th 的正异常。另一方面，矿物化学分析证实，所研究的蛇绿岩杂岩是位于超俯冲带中的 MORB 型蛇绿岩。这得到了矿物学证据的支持，包括橄榄石的成分依赖性（fo_90-91) 在尖晶石橄榄岩地幔相、尖晶石矿物（铝铬铁矿和含镁 / 铬的铁斜长石）和斜方辉石中的富镁斜辉石（顽辉石）上。地球化学模型表明该复合体通过以下连续的岩浆作用步骤演化：1) 混合 NMORB-EMORB (50:50) 来源的部分熔化产生尖晶石斜方锰矿残渣；2) 基性部分熔体在上升到地表过程中的分级结晶和辉长体的形成；3) NMORB 组分重新进入腔室并产生基本枕状熔岩、熔岩流和一些细粒辉长岩体（即岩脉）的同化和分级结晶过程。据此，可以解释所研究的蛇绿岩层序的侵位历史有两个阶段：1）坎帕阶的逆冲阶段；