大陆碰撞造山带石榴橄榄岩作为超高压变质地体的重要组成之一，是俯冲带碳质熔/流体-橄榄岩反应和俯冲带碳循环研究的理想天然实验室，为地幔的碳质熔/流体交代作用与板片俯冲直接联系起来提供了难得的机会。本项目以大别-苏鲁和柴北缘造山带橄榄岩为主要研究对象，拟通过系统的岩相学研究(特别是各种含碳相的识别)、全岩和矿物O同位素、矿物微区主微量元素和Li-Sr-O同位素、全岩主微量元素和Sr-Nd-Mg同位素以及锆石和磷灰石(CL照相、U-Pb定年、微量元素和Hf-O同位素分析)综合研究，识别造山带橄榄岩中碳质熔/流体交代，确定碳质熔/流体交代作用发生的时间和温压条件，查明碳质熔/流体的性质、组成和来源，确定碳质熔/流体与硅质熔/流体交代以及大陆俯冲和碰撞之间的关系；进而探讨碳质熔/流体对橄榄岩的改造效应，为俯冲带碳循环提供制约。

Garnet peridotites in continental collision orogens provide excellent target for studying carbonic fluid/melt-peridotite reaction and carbon cycling in subduction zone, and are potentially to directly link the carbonic fluid/melt metasomatism of mantle to the plate subduction. This project will focus on carbonic fluid/melt metasomatism of orogenic peridotites in the Dabie-Sulu and North Qaidam orogenic belts. The study will be performed on the basis of a careful petrographical study with special attentions to identification of carbonaceous phases. Whole-rock and mineral O isotopes, mineral in situ major-trace elements and Li-Sr-O isotopes, whole-rock major-trace elements and Sr-Nd-Mg isotopes as well as integrated study of zircon and apatite will be investigated. The results will be used to identify carbonic fluid/melt metasomatism in the orogenic peridotites, to determine the timing and P-T condition of the carbonic fluid/melt metasomastism, to provide constraints on the origin, nature and composition of the metasomatic carbonic fluid/melt, to determine the timing of the carbonic fluid/melt metasomatism with respect to the silisic fluid/melt metasomatism and the subduction and collision of the continental crust, and to provide insights into the effect of the carbonic fluid/melt metasomatism on the peridotite and carbon cycling in subduction zones.