地质论评2025，Vol.71Issue(3)：895-902,8.DOI:10.16509/j.georeview.2024.12.001
从地震波速的三维图像看上扬子岩石圈变化
Viewing the lithosphere of upper Yangtze Craton based on three-dimensional images of seismic wave velocity
摘要
Abstract
After the collision between the Indian Subcontinent and the Asian Continent,the Indian Subcontinent is subducting below the Asian Continent.The continental collision and land-to-land subduction not only caused the crust of the Qinghai—Xizang(Tibet)Plateau being shortened and thickened,but also led to significant changes in the geomorphological environment and deep structures of the vast area around the plateau.Is there a large amount of material wriggling from below the plateau to South China Craton and/or North China Craton?Does it cause the uplift of the Yunnan—Guizhou Plateau?In this paper,high-resolution seismic tomography is used to study the creep of materials from below the plateau and the uplift of the Yunnan—Guizhou Plateau.Seismic tomography shows that during the collision and subduction between the Indian Subcontinent and the Eurasian Continent,the lithospheric material of the Qinghai—Xizang Plateau was extruded under the upper Yangtze Craton,and the extrusion occurred in the middle of the lithospheric mantle at a depth of 73～113 km,along the route of Yidun—Xichang—Dongchuan—Anshun.One of the consequences of the extrusion of material from the central lithospheric mantle of the Qinghai—Xizang Plateau is the increase of the lithospheric volume,and causing uplift of the Yunnan—Guizhou Plateau.关键词
动力学作用/中国西南部/地震波速度/三维层析成像/青藏高原/云贵高原/高原隆升Key words
dynamics/southwest China/seismic wave velocity/three-dimensional tomography/Qinghai—Xizang(Tibet)Plateau/Yunnan—Guizhou Plaeau/plateau uplift引用本文复制引用
刘晓宇,杨文采,瞿辰..从地震波速的三维图像看上扬子岩石圈变化[J].地质论评,2025,71(3):895-902,8.基金项目
本文为中国科学院学部咨询评议资助项目(编号:2022-ZW11-A-0024)的成果. This paper is financially supported by the Consultation and Evaluation Project of the Faculty of Chinese Academy of Sciences(No.2022-ZW11-A-0024) （编号:2022-ZW11-A-0024）
