岩石圈结构成像方法的进展与展望  

Methods and prospects for lithospheric structure imaging

作　　者：单斌 周万里 Shan Bin;Zhou Wanli(a.Insitute of Geophysics and Geomatics,China University of Geosciences(Wuhan),Wuhan 430074,China;b.Hubei Subsurface Multi-Scale Imaging Key Laboratory,China University of Geosciences(Wuhan),Wuhan 430074,China)

机构地区：[1]中国地质大学(武汉)地球物理与空间信息学院,武汉430074 [2]中国地质大学(武汉)地球内部多尺度成像湖北省重点实验室,武汉430074

出　　处：《地质科技通报》2022年第5期112-121,共10页Bulletin of Geological Science and Technology

基　　金：国家重点研发计划项目(201YFC1500302);国家自然科学基金项目(41674106)。

摘　　要：近年来,随着观测数据的增加、观测精度的提升、物理化学理论的不断完善以及计算机技术的显著提升,使得人们对岩石圈物理化学性质的认识发生了重大改变。介绍了目前关于岩石圈结构成像的相关方法以及它们的优缺点,并以华南地区4个具有代表性的区域(四川盆地、江南造山带、下扬子克拉通以及华夏块体)为例,利用地形、大地水准面、地表热流、地震面波频散曲线等观测资料,通过热动力学模拟和概率密度反演方法,给出了该地区岩石圈温度、化学组分结构。结果显示,华南块体东部岩石圈较薄,岩石圈地幔以饱满型橄榄岩为主,太平洋板块由东往西的平俯冲作用可能是华南东部岩石圈减薄的主要动力学机制。结合现今岩石圈结构的研究现状,提出了岩石圈结构成像存在的问题,并对未来岩石圈结构成像研究进行了展望。In recent years,with rich observation data,the perfection of physical chemistry theory and the remarkable improvement of computer technology,great changes have taken place in the understanding of lithospheric physical and chemical properties.This paper introduces the current imaging methods of lithospheric structure and their advantages and disadvantages.Based on thermodynamic simulation and probability density inversion,we study the lithospheric thermal and compositional structure in South China(Sichuan Basin,Jiangnan Orogenic Belt,Lower Yangtze Craton and Cathaysian Block)using the observed Rayleigh wave phase velocity dispersion curve,geoid height,topography and surface heat flow.The results show that the lithosphere in the east of South China block is thin,and the lithospheric mantle is dominated by fertile peridotite,while the subduction of the Pacific plate from east to west may be the main dynamic mechanism of lithospheric thinning in the east of South China.Finally,we introduce the existing problems of lithospheric structure imaging and the prospect of future lithospheric structure imaging based on the current research status of lithospheric structure.

关 键 词：岩石圈温度结构 岩石圈化学组分结构 多观测概率密度反演 成像方法 

分 类 号：P631[天文地球—地质矿产勘探]