地震学报（英文版）2002，Vol.15Issue(2)：134-142,9.
3-D velocity structure of P wave in the upper mantle beneath southwestern China and its adjacent areas
3-D velocity structure of P wave in the upper mantle beneath southwestern China and its adjacent areas
摘要
Abstract
3-D velocity structure of P wave in the upper mantle beneath southwestern China and its adjacent areas (10(N ~36(N, 70(E~110(E) down to the depth of 400 km has been studied by using 80 974 P-wave first arrival times recorded at 165 stations from 7 053 events both within the studying areas, selected from the ISC bulletin and the Bulletin of China and NEIC fundamental seismic network. With a resolution of grid spacing of 2((2(, the velocity heterogeneity on the horizontal profile is obvious though it attenuates with the depth increasing. On the vertical profiles of velocity along the latitude of 16(N and 24(N, the collision and extrusion of India plate to Eurasia plate is displayed, and a remarkable velocity difference between India plate and Eurasia plate is shown. In the vertical profile along the longitude of 90(E, the subducting of India plate northward beneath Eurasia plate (Tibet plateau) is also obvious. On the horizontal profile at the depth of 90 km, a slow velocity stripe from Myitkyina, Myanmar to Donghai, Vietnam seems to be related to Honghe fault belt. An illustration method of describing the resolution more directly and exactly has been proposed and utilized in this paper.关键词
Southwestern China and its adjacent areas/upper mantle/3-D velocity structure/description of the resolutionKey words
Southwestern China and its adjacent areas/upper mantle/3-D velocity structure/description of the resolution分类
天文与地球科学引用本文复制引用
雷建设,周蕙兰..3-D velocity structure of P wave in the upper mantle beneath southwestern China and its adjacent areas[J].地震学报（英文版）,2002,15(2):134-142,9.基金项目
State Natural Science Foundation of China(49734150) （49734150）
