摘要
本文利用地震资料并结合地质资料,讨论了印度板块与欧亚板块在中国周边的相互作用及其对中国应力场的影响,指出两板块在喜马拉雅山前断裂地区碰撞,碰撞边界向西延续到35°N,74°E附近,其主要挤压方向为NNE,并形成SE方向的物质流动.帕米尔地区有强烈的构造运动,并存在俯冲带形态的构造.在26.5°N,97°E附近,板块边界的走向发生突变,并形成东倾的缅甸山弧俯冲带,但印度板块挤压造成的主压应力方向为NNE向.在安达曼—尼科巴—苏门答腊—爪哇岛弧,印度板块俯冲于欧亚板块之下,在中国南海一带形成NNW向或近Ns向的主压应力.
The interaction between Indian plate and Eurasian plate in the vicinity of China was studied by using the seismic data and geological data. It was pointed out that the boundary of the two plates along the front fault of Himalaya is a typical colliding one which extends westwards to the point of 35°N, 74°E and causes strong and widespread compression in the direction of NNE and makes the material in Tibet move in SE direction. In the Pamir region, deformation is severe under the compression in NS direction, and there is a deep structure similar to a subduction zone. At about 26.5°N, 97°E, the boundary of the two plates turned to the south and formed a subduction zone which dips to the east under Burmese arc, but it causes compression in NNE direction. The Indian plate subducted under the Andaman-Nicobar-Sumatra-Java island arc, the stress state in the South China Sea and its vicinity is controled by the compression in the NNE direction from the Indian plate in the Sumatra-Java trench and the southwestward material flow from Tibet.
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
1992年第4期428-440,共13页
Chinese Journal of Geophysics
基金
地震科学联合基金
关键词
板块
相互作用
应力场
影响
Interaction between plates, Colliding zone, Subduction zone, Fault plane solutions, Indian plate, Stress field in China.
