俯冲带深部碳循环:问题与探讨

发布时间：2018-03-20 04:19

本文选题：深部碳循环　切入点：俯冲带　出处：《矿物岩石地球化学通报》2017年02期 　论文类型：期刊论文

【摘要】：碳循环可以分为地球表层短周期的地表碳循环和地球内部长周期的深部碳循环。地球的碳90%以上是赋存在固体地球内部,因此深部碳循环研究对于探讨地表碳循环过程具有重要意义。本文较深入地探讨了俯冲带深部碳循环研究的现状和问题。目前俯冲带深部碳循环研究关键的科学问题包括:(1)俯冲带变质过程中含碳物质相的转变,(2)俯冲带脱碳机制,(3)俯冲带深部碳循环和地幔交代作用。俯冲带变质过程中含碳物质相的转变是深部碳循环研究的最基本问题,将是深部碳进一步研究的重点。俯冲带脱碳机制主要包括纯变质反应脱碳、流体溶解脱碳(流体渗透作用)、熔融作用脱碳和氧化还原反应脱碳4个方面,这是目前深部碳循环研究的前沿领域。俯冲带深部碳循环研究对于探讨地幔不均一性以及地幔交代过程都具有重要研究意义。
[Abstract]:The carbon cycle can be divided into the surface carbon cycle of the surface layer of the earth's surface and the deep carbon cycle of the earth's interior with a long period. More than 90% of the earth's carbon is located in the solid earth's interior. Therefore, the study of deep carbon cycle is of great significance to the study of surface carbon cycle. The present situation and problems of deep carbon cycle research in subduction zone are discussed in depth. The key science of deep carbon cycle research in subduction zone at present is discussed in this paper. The problems include: 1) the transformation of carbonaceous phase during metamorphism of the subduction zone and 2) the mechanism of decarbonization in the subduction zone, I. e) the deep carbon cycle and mantle metasomatism in the subduction zone. The transformation of the carbonaceous material phase during the metamorphism of the subduction zone is the most basic problem in the study of the deep carbon cycle. The mechanism of decarbonization in subduction zone mainly includes pure metamorphic reaction decarbonization, fluid solution decarbonization (fluid permeation, melting decarbonization and redox reaction decarbonization). The study of the deep carbon cycle in the subduction zone is of great significance for the study of mantle heterogeneity and mantle metasomatism.
【作者单位】：北京大学地球与空间科学学院;
【基金】：国家自然科学基金项目(41520104004) 国家重点基础研究发展计划项目(2015CB856105)
【分类号】：P595

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