摘要
以“中国大陆地壳应力环境基础数据库”资料为基础 ,总结了中国大陆及邻区现代构造应力场的基本特征 ,提出了划分构造应力分区的原则 ,将中国大陆及邻区现代构造应力场划为四级应力区 .指出一级构造应力区主要受板块边界的几何特征和作用在边界上的力所控制 ,应力作用在大范围和长时间内保持均匀和稳定 ;二级构造应力区受控于区域块体间的相互作用 ,在较大区域范围内应力作用具有较强的相关性 ;三级构造应力区受控于区域内部块体间的相互作用 ,在一定区域范围内应力结构具有相似性 ;四级构造应力区受控于块体和断裂相互作用的影响 ,其应力性状 (方向、强度、结构等 )一致性较好 .
On the basis of the 'Basic database of crustal stress environment in China', this paper summarizes the basic characteristics of recent tectonic stress field in China and adjacent areas, proposes the principle of dividing the tectonic stress districts. The recent tectonic stress field of China and adjacent areas is classified into four classes: The characteristic of the first order tectonic stress district shows uniformity and stability in large areas and long time. This stress field is mostly controlled by the geometry character of plate boundary and the force acting on plate boundary. The stress action of second order tectonic stress district shows coherence in a relatively large area. This stress field is controlled by regional block interaction. The stress regime of the third order tectonic stress district shows comparability in finite areas. This stress field is mostly influenced by interior block interaction inside the areas. The stress character (direction, intensity, structure, etc) of the forth order stress district shows better coherence. This stress field is mostly controlled by block and fault interaction. The paper preliminarily analyzes the dynamic environment which controlled the recent tectonic stress field in China and adjacent areas.
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
2004年第4期654-662,共9页
Chinese Journal of Geophysics
基金
国家重点基础研究发展规划项目 (G19980 40 7)
国家科学技术部基础性工作专项基金资助 ( 2 0 0 0 112 )
关键词
构造应力场
分区
动力学
中国大陆
Tectonic stress field, Region division, Dynamics, China continent.
