地球与行星物理论评（中英文）2025，Vol.56Issue(5)：528-535,8.DOI:10.19975/j.dqyxx.2024-034
青藏高原东北缘伴随层析成像研究进展
Review on the adjoint tomography studies of the northeastern Qinghai-Xizang Plateau
摘要
Abstract
The northeastern margin of the Qinghai-Xizang Plateau,as the leading edge of the plateau's expan-sion into the interior of the Asian continent,holds significant importance for understanding the lateral expansion mechanism of the plateau and the deep dynamic background.With the improvement in computational capabilities and the development of advanced numerical methods,adjoint tomography based on seismic wave equation has been widely applied to crust and mantle structure studies on regional to global scales,deepening our understanding of the Earth's internal structure and dynamic processes.This paper reviews the research progress of adjoint tomography in the northeastern margin of the Qinghai-Xizang Plateau,focusing on the spatial distribution of mid-to-lower crustal flow,interactions between different tectonic blocks,and the mechanisms of large earthquake generation in the re-gion. The research shows that there is widespread mid-to-lower crustal flow within the Songpan-Ganzi Terrane,which extends northward across the Kunlun Fault and terminates in the central Qinling-Qilian Terrane.In contrast,the mid-to-lower crust beneath the Qinling Orogenic Belt is characterized by high velocity,suggesting that weak crustal material from the Qinghai-Xizang Plateau has not flowed into this area.Additionally,the lithospheric base-ment beneath the Sichuan Basin extends westward into the interior of the plateau and reaches near the Longriba Fault Zone.This indicates that the Longriba Fault Zone serves as an important tectonic boundary between the Qing-hai-Xizang Plateau and the Yangtze Block,potentially representing the westernmost edge of the Yangtze Block. Furthermore,the study reveals that large earthquakes in this region frequently occur in areas with high gradi-ents in seismic velocity and radial anisotropy or in transitional zones between high and low gradients.This finding enhances our understanding of the mechanisms of large earthquake generation in the northeastern margin of the Qinghai-Xizang Plateau.The complex tectonic interactions and resulting deformation processes play a crucial role in shaping the seismotectonic environment of this area.关键词
青藏高原东北缘/伴随层析成像/中下地壳流/地震孕育机制Key words
northeastern Qinghai-Xizang Plateau/adjoint tomography/mid-lower crustal flow/mechanism of earthquake generation分类
地球科学引用本文复制引用
董兴朋,杨顶辉..青藏高原东北缘伴随层析成像研究进展[J].地球与行星物理论评（中英文）,2025,56(5):528-535,8.基金项目
国家自然科学基金资助项目(42374115,42004077)Supported by the National Natural Science Foundation of China(Grant Nos.42374115,42004077) （42374115,42004077）
