俯冲带脱挥发分作为参与交代地幔楔的物质流的主要来源,对促成岛弧岩浆岩作用及区域成矿有着决定性的意义。然而模拟计算显示在岛弧深度，俯冲带脱挥发分/脱碳酸盐化作用对交代/氧化地幔楔所产生的碳通流实际上却非常有限，这种解耦的趋势说明很可能存在其他的，具有决定性意义的深部机制控制着俯冲板片和地幔楔之间的碳运移。南天山超高压变质杂岩带,以其大规模出露的榴辉岩/蓝片岩相变质岩枕结构、高压脉体和大量的柯石英报道闻名于世。区域内发现的经历过高压甚至超高压变质作用的含緑辉石大理岩，及碳酸盐化的榴辉岩中石墨和轻质烃包裹体，暗示了一处从岩石学/矿物学尺度，针对代表性岩性和样品，开展深部碳多相转化、储存和运移相关研究的绝佳场所。 申请人已在区域内发现并采集到的记录有俯冲带岛弧深度环境下碳储存/运移的现象的代表性样品，为有效回答“俯冲带深部碳通流的命运和演化和其对地幔楔的交代/氧化的贡献”提供了可观的潜在基础。

The devolatilization of the subduction zone is the main source of the material flow involved in the metamorphic mantle wedge, which is of decisive significance for the formation of island arc magmatism and regional metallogenesis. However, thermodynamic numerical modeling show that at sub-arc depth, the carbon flux contributed by the devolatilization/decarbonation from the subduction zone to the metamorphic/oxidized mantle wedge is actually very limited. This decoupling trend indicates that there is a potential existence of other decisive deep mechanisms controlling the carbon migration between the subduction plate and the mantle wedge. The Southern Tianshan UHP metamorphic complex belt is well known for the pervasive eclogite/blue schist facies metamorphic rocks with pillow structure, high-pressure veins and a large number of coesite reports. The findings of the omphacite-containing marble that has undergone high pressure or even ultrahigh-pressure metamorphism, and the graphite and light hydrocarbon inclusions in the carbonated eclogite, suggesting an excellent area for the research on deep carbon multiphase transformation, storage and migration via representative lithology and samples on petrological/ mineralogical scale. The phenomenon of carbon storage/transportation took place at sub-arc depth between subduction plate interface may be recorded in the region, which could provide a considerable potential to an decisive answer for the “the fate and evolution of the deep carbon flux in subduction zone and its contribution to the metasomatism/oxidation of the overlaying mantle wedge”.