地球与行星物理论评（中英文）2026，Vol.57Issue(5)：553-569,17.DOI:10.19975/j.dqyxx.2025-046
基于XKS震相的地幔各向异性研究进展
Progress in mantle anisotropy research based on XKS phases
摘要
Abstract
XKS shear-wave splitting has been widely applied to investigations of anisotropy in both the upper mantle and the lowermost mantle D"layer,and represents a key tool for probing mantle deformation and dynamics.The first part of this paper reviews the basic principles and major approaches of XKS splitting analysis,and sum-marizes its applications to upper-mantle anisotropy beneath the Chinese mainland,where strong regional variations in deformation are observed,primarily controlled by the subduction of the Indian plate and the western Pacific plate.We further discuss methods,applications,and challenges in using XKS phases to probe D"anisotropy,high-lighting that complex and strong anisotropic structures are commonly observed beneath remnant slab regions and large low-shear-velocity provinces,while effective separation of upper-mantle contributions and mitigation of wavefield scattering and interference remain major difficulties.Over the past decade,with the rapid growth of seis-mic datasets and advances in inversion techniques,XKS-based three-dimensional anisotropic imaging of the upper mantle has become increasingly mature,significantly improving depth resolution of anisotropic structures.The second part of this paper introduces the theoretical framework and development of this imaging approach and sum-marizes recent results.This method is capable of delineating three-dimensional upper-mantle anisotropy and effec-tively identifying deep structures such as slab geometries,mantle upwellings,and layered anisotropy,although the imaging quality strongly depends on data coverage and observation density.Finally,we discuss future perspectives of XKS studies in mantle anisotropy research.The field is evolving from traditional parameter-based analyses to-ward full three-dimensional imaging.However,three-dimensional anisotropic imaging of both the upper mantle and the D"layer beneath the Chinese mainland remains limited.Future efforts should integrate multiple anisotropic constraints,promote multi-layer mantle coupling studies,and incorporate artificial intelligence techniques to im-prove the accuracy of shear-wave splitting analysis,thereby providing a foundation for constructing high-resolu-tion,high-precision three-dimensional anisotropic models of the mantle beneath China.关键词
XKS震相/剪切波分裂/地震层析成像/敏感核/上地幔/D"层Key words
XKS phases/shear wave splitting/seismic tomography/sensitivity kernel/upper mantle/D"layer分类
天文与地球科学引用本文复制引用
王俊淑,石玉涛,琚长辉,李国辉,高原..基于XKS震相的地幔各向异性研究进展[J].地球与行星物理论评（中英文）,2026,57(5):553-569,17.基金项目
国家自然科学基金资助项目(42374123) （42374123）
中国地震局地震预测研究所基本科研业务费(CEAIEF20240203) （CEAIEF20240203）
重点研发青年科学家资助项目(2024YFF0809500) Supported by the National Natural Science Foundation of China(Grant No.42374123),the Basic Research Fund of the Institute of Earthquake Forecasting,China Earthquake Administration(Grant No.CEAIEF20240203),and the Key Research and Development Plan for Young Scientists(Grant No.2024YFF0809500) （2024YFF0809500）
