本申请拟对柴北缘超高压变质带都兰北带野马滩剖面中的蛇纹石化石榴橄榄岩、石榴辉石岩和榴辉岩所构成的岩石组合以及围岩，进行系统的岩石学、构造地质学、元素地球化学、同位素地球化学及地质年代学综合研究，以确定此剖面是否为蛇绿岩组合残留。通过矿物结构和成分研究确定石榴二辉橄榄岩和榴辉岩的P-T轨迹，并确定它们是否经历过超高压变质作用；运用相平衡模拟围岩泥质片麻岩的变质演化历史。对这几类岩石综合进行主微量和同位素地球化学研究，揭示其成因。综合运用锆石、金红石、榍石等副矿物U-Pb体系和云母角闪石等的Ar-Ar体系开展定年工作，以限定其形成和变质时代以及冷却史。在此基础上，对比沙柳河蛇绿岩组合，确定此区域内这一岩石组合与围岩之间的关系，并探讨它们的深俯冲过程及抬升折返机制。

In this project, we will focus on the lithology of serpentinized peridotite, garnet pyroxenite and elcogite, and the country gneiss in North Dulan subbelt, North Qaidam UHPM belt. Based on petrology, structral geology, geochemistry and geochronology studies, we will make it clear whether this lithology is a ophiolitic relict. Using texture and composition of main minerals, to constrain the P-T paths of serpentinized garnet peridotite and eclogite, and find the UHP metamorphism evidence. Using the phase equilibria data to constrain the metamorphic history of pelitic gneiss. Combined with the major, trace elements and isotopic data, we will discuss the genesis of these rocks. To construct the protolith, metamorphic and cooling time of these rocks, U-Pb dating for zircon, rutile and tatanite, and Ar-Ar dating for mica and hornblende will be done. Compared with the Shaliuhe ophiolite lithology, we will discuss the relationship between the rock lithology and the country gneiss, and also the mechanism of the deep subduction and exhumation for these rocks.