摘要
对我国东南陆缘地区的人工地震测深、大地电磁测深、重磁测量、地热测量、地学大断面编制以及天然地震的层析成像等大量深部构造研究结果作综合分析。地热异常、地壳内存在低速层和高导层、强烈地震频繁发生等现象说明，这一地区是现代构造运动的活动区。中国东南陆缘的现今应力场主压应力方向为ＮＷＷ－ＳＥＥ，认为是菲律宾板块对欧亚板块的挤压，以及冲绳海槽的扩张等联合作用的结果。因此，这一地区地壳运动的驱动力是太平洋板块和菲律宾板块向欧亚板块推挤产生的。
The research results from the deep seismic sounding, magnetotelluric sounding, gravity survey, aeromagnetic survey, geothermal survey, compilation of the Geoscience Transect, and seismic tomography in the southeast continental margin of China are comprehensively analyzed in this paper. The geothermal anomaly, low velocity zone and high conductivity layer in crust, and frequent occurrence of strong earthquakes show that the study area is an active area of modern tectonization. The principal compressive stress trending NWW-SEE of modern stress field in the southeast continental margin of China is attributed to the joint action by the compression of the Philippine plate to the Eurasian plate, and extension of the Okinawa trench. The driving force of the crustal movement in this area is generated by the compression of the Pacific plate and the Philippine plate to the Eurasian plate.
出处
《地壳形变与地震》
CSCD
1998年第2期1-8,共8页
Crustal Deformation and Earthquake
基金
国家自然基金委员会资助
关键词
中国
陆缘
深部结构
动力学过程
deep structure, low velocity zone, high conductivity layer, geodynamics, modern tectonization
