南北地震带和青藏块体东部近期大地形变与地震特征  

The Characteristic of Recent Geodetic Deformation and Earthquake in North South China Seismic Belt and East of the Qinghai Xizang Plate

作　　者：江在森[1] 王双绪[1] 赵振才[1] 

机构地区：[1]国家地震局第二地形变监测中心

出　　处：《中国地震》1997年第2期139-150,共12页Earthquake Research in China

基　　金："九五"国家科技攻关计划项目

摘　　要：通过研究南北地震带及青藏块体东部地区２０多年来大地形变场演化特征及其与地震活动的呼应关系，发现大地形变既具有时空分布的不均匀性，各分区形变场又具有同时段的宏观相似性；继承性运动是现代地壳运动的总趋势，而运动方式为波浪式、涌动式推进。地壳运动过程中存在着区域应变能积累阶段和释放调整阶段，这可能是地震活动的相对平静与活跃的动力机制。１９９１年以来的地壳运动趋势分析，对判断该区域的应力状态和地震大形势具有一定的参考意义。In this paper,the corresponding relation of the evolutionary characteristics of geodetic deformation field with the seismic activity for more than 20 years in the North South China seismic belt and East of Qinghai Xizang Plate has been investigated.Not only geodetic deformation are in non homogeneity for the space time distribution,but also deformation fields are in macroscopic similarity for the identical time interval.The inherited tectonic movement is a total tendency of recent crustal movement,and the motion mode is in undulations.With stage of accumulative and release setting of strain energy in crustal movement process may be dynamic mechanism of relative quiet and active of the seismicity.The analysis of the crustal movement tendency since 1991 have some significance for the judging stress state and large seismic situation in the area.

关 键 词：地震带 大地形变场演化 地震活动 地块 地震特征 

分 类 号：P315.2[天文地球—地震学] P551[天文地球—固体地球物理学]