深俯冲洋壳脱碳作用与榴辉岩型深源金刚石成因:进展与挑战
The decarbonization of deeply subducted oceanic crusts and genesis of super-deep eclogitic diamonds:progresses and challenges
张艳飞 1王超 1章军锋 2巫翔 1朱峰2
作者信息
- 1. 中国地质大学(武汉)地质过程与矿产资源国家重点实验室,武汉 430074
- 2. 中国地质大学(武汉)地球科学学院,武汉 430074
- 折叠
摘要
蚀变洋壳是俯冲带碳输运的主要寄主岩石之一,具有把大量碳输运至地球内部和促进地幔碳循环的潜力.金刚石是直接来自地幔深部的单质碳,包含了地幔深部有关碳赋存和碳迁移的重要信息.高温高压实验是研究俯冲洋壳脱碳过程的正演模拟手段,而榴辉岩型深源金刚石则直接指示了俯冲洋壳在地幔深部的脱碳过程,二者相互结合能较完整地刻画深俯冲洋壳的脱碳机制和碳迁移过程.本文综述了前人有关榴辉岩型深源金刚石来源深度和俯冲含碳洋壳高温高压实验岩石学研究方面的进展,对比讨论了榴辉岩型深源金刚石的成因,最后提出了几点值得进一步研究的方向.
Abstract
Altered basalt of oceanic crust is one of the main host rocks for the transportation of carbon in subduction zones,I has the potential to transport significant amounts of carbon into the Earth's interior and to promote the cycling of carbon in the mantle.Diamond is a simple carbon directly sourced from the deep part of the mantle.It contains important information about the storage and migration processes of carbon in the deep part of the mantle.The high-pressure and high-temperature experiment is used as a forward modeling method to study the decarbonization process of the subducted oceanic crust.Eclogitic diamonds directly reflect the decarbonization process of subducted oceanic crust in the deep part of the mantle.The combination of these two methods can be used to completely characterize the decarbonization mechanism and carbon migration process of the deeply subducted oceanic crust.In this paper,we have summarized progresses of researches on the depth of deeply sourced ecologitic diamonds and progresses of the high-pressure and high-temperature experimental petrological studies on the subducted carbon-bearing oceanic crusts,discussed the genesis of eclogitic diamonds based on the comparative study,and finally proposed several directions worth for the further research.
关键词
俯冲洋壳/脱碳作用/深源金刚石/下地幔Key words
subducted oceanic crust/decarbonization/super-deep diamond/lower mantle引用本文复制引用
出版年
2024
NETL
NSTL
万方数据