矿物高压稳定性与深部挥发分循环过程  

High-pressure Stability of Minerals and Volatiles Cycling in the Deep Earth

作　　者：刘锦 吕超甲 赵超帅 LIU Jin;LYU Chao-jia;ZHAO Chao-shuai(Center for High Pressure Science and Technology Advanced Research,Beijing 100094,China)

机构地区：[1]北京高压科学研究中心,北京100094

出　　处：《矿物岩石地球化学通报》2022年第2期245-259,共15页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国家重点研发计划项目(2019YFA0708502);国家自然科学基金资助项目(42072052)。

摘　　要：深地过程是驱动整个地球系统运行的重要引擎。其中,深部挥发分的循环过程及其效应是当前国际固体地球科学研究的热点、前沿和难题。深部矿物的高压稳定性与深部过程密切相关。一方面,俯冲带碳酸盐和含水矿物是联动地表与深部挥发分循环的重要载体,其稳定性深刻影响着地震与火山活动、大气圈演化及地球内部结构的演化。通过对碳酸盐和含水矿物高压稳定性的实验模拟与理论预测研究,发现深部关键挥发分循环过程可涵盖整个地幔直至核幔边界。另一方面,地核可能是地球上最大的挥发分储库。然而,对地核铁合金的轻元素种类和含量及其在深部挥发分循环过程中所扮演的角色的认识仍存在分歧,将来的研究中核幔相互作用及其对深部挥发分循环的影响应受到关注。The process of the Earth’s deep interior is the key engine for driving the operation of the entire Earth system.In particular,the cycling process of deep volatiles and its effects are hotspots,frontiers,and difficult problems for the international solid earth science research at present.The process of the Earth’s deep interior is closely related to the stability of deep Earth minerals under high-temperature and high-pressure conditions.On the one hand,carbonates and hydrous minerals in the subduction zone are important carriers for linking the cycling of volatiles on surface with those in the Earth’s deep interior.Their stabilities have profound impacts on earthquakes,volcanic activities,the evolution of the atmosphere,and the evolution of the Earth’s internal structure.Through the experimental simulation and theoretical prediction of high-pressure stabilities of carbonates and hydrous minerals,it is found that the cycling processes of key volatiles in the Earth’s deep interior could be occurred in the whole mantle even the core-mantle boundary.On the other hand,the Earth’s core may be the largest reservoir of deep volatiles.However,the types and contents of light elements in the ferroalloy of the core and their roles played in the cycling process of volatiles throughout the deep interior are still highly debated.Therefore,future research should focus on the core-mantle interaction and its influence on the cycling of deep volatiles.

关 键 词：地球深部过程 高温-高压 深部水 深部碳 地核轻元素 

分 类 号：P542.5[天文地球—构造地质学]