摘要
本文根据有限元法反演了南海及邻域现代构造应力场的基本特征,着重讨论了应力场与地震活动、火山活动、活动断裂和地壳升降运动等的相关性,并根据最大剪应力的数值将本区划分为极不稳定区(≥1.8×10~7Pa)、不稳定区(1.2×10~7Pa-1.8×10~7Pa)、次稳定区(6×10~6Pa-1.2×10~7Pa)和稳定区(<6×10~6Pa)等4个大区域的地壳稳定性分区。
According to the characteristics of recent tectonic stress field in South China Sea and its adjacent area inverted by finite element method, this paper mainly discusses the interrelation between stress field,seismic activity, Volcanic activity,active faults,and crustal uplift and subsidence movem-rnt. on the basis of magnitude of maximum shearing stress, the studied regiion is divided into 4 areas : highly unstable area (≥1. 8×107Pa), unstable area 1. 2×107 -1. 8×107Pa) sub-stable area (6×106-1. 2×107Pa) and stable ares ( <6×106Pa).
出处
《华南地震》
1993年第1期11-21,共11页
South China Journal of Seismology
关键词
构造应力场
地壳运动
稳定性
南海
Recent tectonic stress field
Recent crustal movement
Crustal stability
South China Sea
