摘要
对山西地区1980-2010年的水准观测资料计算，获得垂直形变速率，并按照地质构造单元分块拟合，得到块体运动速率和块体边界断裂带的活动速率。在此基础上研究了山西地区近30年来的地壳垂直变化和构造活动。结果表明，山西地区西部上升，东部下降。吕梁山块体掀斜抬升，太行山块体为掀斜活动，山西断陷带为掀斜下降。地壳垂直形变揭示出山西断陷带现代构造活动为裂陷运动，裂陷速率为2．68mm／a，边界断裂带活动速率为1．14～4．33mm／a，均为正断活动。
The vertical deformation rates of Shanxi Area during 1980-2010 got from leveling observation data and matched with geological structure units, the block movement rate of the Area（ as a block）and the activity rates of boundary faults were obtained. Based on the data, the crust vertical changes and tectonic activity were studied in the past 30 years in the Area. The results show that the western region of Shanxi Area ascended, the eastern region descended, the Lvliangshan Block was tih-uplifting, the Taihangshan Block tilted, and Shanxi Graben tilt-ascen-ded. The modern tectonic activity of Shanxi Graben system was faulted-subsidence with a rate of 2.68 mm/a, and activity rate of of block boundary faults were all normal faulting with the rates ofl. 14-4.33mm/a.
出处
《大地测量与地球动力学》
CSCD
北大核心
2014年第1期32-37,共6页
Journal of Geodesy and Geodynamics
基金
中国地震局全国地震区划图编制项目(2006BAC01B02-02-03)
中国地震局地震科技星火项目(XH12071)
中国地震局地震行业科研专项(200908028)
关键词
垂直形变速率
块体掀斜
断裂活动
山西断陷带
裂陷运动
vertical deformation rate
block tilt
fault activity
Shanxi graben system
rift subsidence motion
