摘要
根据已获得的最新GPS观测资料，利用有限元方法反演华北地区现分构造应力场。反演结果表明，华北地区现令构造应力场除受NE55°－SW235°方向的压应力外，同时还受到SE140°－NW320°方向的技应力，其中NE－SW向的压应力最大，约为SE－NW向的两倍。研究表明，这一应力场是两种动力学过程的叠加，一是印度板块和太平洋板块的挤压，其中来自印度洋板块的作用力量大，约为太平洋板块作用力的1．5倍；另一个是因地幔隆起而产生的NW－SE向水平拉张力。
On the basis of obtalned data of GPS,the present tectonic stress field in North China region was presented by means of the finite element method. The result shows that the present tectonic stress field rc-sults from SE140°—NW320°trend tensile stress in addition to NE55° - SW235°trend prcss stress which is one time larger than the former. The NE55°-SW230° trend press stress seems to be mainly due to the press of Pacific plate and lndian plate,whose drive strength is 1. 5 times larger than that of Pacific plate. While SE-NW trend tensile stress is rclated to the tcnsive mechanism result from thc upheaval of upper mantle.
出处
《地质科技情报》
EI
CAS
CSCD
北大核心
1999年第3期99-103,共5页
Geological Science and Technology Information
基金
国家自然科学基金!49674209
"华北GPS地形变监测网建设项目"
关键词
华北地区
GPS
观测资料
构造应力场
North China region,GPS data,inversion,tectonic tress field
