An International Collaborative Investigation of Khoy Ophiolite, NW, Iran

9903249加齐比特利斯-扎格罗斯缝合带的蛇绿岩形成了特提斯大洋碎片的不连续线性带，形成了阿曼萨迈尔蛇绿岩和塞浦路斯特罗多斯蛇绿岩之间的桥梁。Bitlis-Zagros缝合带的伊朗蛇绿岩包括Neyriz、克尔曼沙阿和可能的霍伊的复合体。 目前，我们对这些蛇类起源的许多基本方面的知识存在巨大差距（例如，地幔来源、成岩成因、构造环境和形成时间、侵位时间和机制），从而有助于我们对中东和东地中海地区中新生代地质以及特提斯古地理的认识。 伊朗西北部的霍伊蛇绿岩特别适合研究，因为：1）它是区内最大的完整杂岩之一，具有可填图的蛇绿岩伪地层; 2）它具有一个界限清楚的变质基底，其岩石显示出从角闪岩相到绿片岩相的逆热梯度效应; 3）它位于阿拉伯海岬沿着地中海和中东蛇绿岩带的重要交汇处，（4）在重建特提斯洋闭合的构造模型中，它被忽略了。这一研究结果将有助于加深对大洋扩张中心岩浆活动、洋壳形成以及蛇绿岩成因和侵位的物理化学过程的认识。 最终，我们希望生成一个现代的，高质量的地球化学数据库，并评估古代构造岩浆作用在这个很少研究的地区，并回答一些基本问题特提斯和印度洋岩浆活动，时间和构造的海洋关闭和地球化学领域的演变在上地幔，蛇绿岩成因一般。

9903249GhaziThe ophiolites of the Bitlis-Zagros Suture Zone zone form a discontinuous linear belt of Tethyan oceanic fragments which form a bridge between the Samail Ophiolite in Oman and the Troodos ophiolite in Cyprus. The Iranian ophiolites of the Bitlis-Zagros Suture Zone include complexes at Neyriz, Kermanshah and possibly at Khoy. Currently there is an immense gap in our knowledge about many fundamental aspects of genesis of these ophiolites (e.g., the mantle sources, the petrogenetic origin, the tectonic environment and timing of formation, timing and mechanism of emplacement) and thus in our understanding of the Mesozoic-Cenozoic geology of the Middle East and Eastern Mediterranean regions as well as of Tethyan paleogeography. The Khoy ophiolite of northwestern Iran is especially suitable to study because; 1) it is one of the largest intact complexes in the region with a mappable ophiolite pseudostratigraphy, 2) it has a well-defined metamorphic sole whose rocks show effects of an inverse thermal gradient from amphibolite facies to greenschist facies, 3) it is located at an important junction between the belts of Mediterranean and Middle Eastern ophiolites along the Arabian promontory, and 4) it has been overlooked in tectonic models for reconstruction of closure of the Tethys Ocean. The results of this study will advance understanding of the physiochemical processes involved in magmatism at oceanic spreading centers, formation of oceanic crust, and ophiolite genesis and emplacement. Ultimately, we hope to generate a modern, high-quality geochemical database and evaluate ancient tectonomagmatic processes in this little-studied region and answer some of the fundamental questions about Tethyan and Indian Ocean magmatism, timing and tectonics of ocean closure and the evolution of geochemical domains within the upper mantle, and ophiolite genesis in general.