摘要
结合青藏高原的块体构造和中级地震震源机制解,对巴颜喀拉地块东部区域的震源机制解进行分区域计算,得到不同区域的应力场状态,证实了巴颜喀拉地块"东逸"的理论力学背景。根据块体构造相互作用等方面的分析,对不同区域的地震性质及应力状态的形成原因进行解释和推断,并对汶川8.0级地震的构造影响进行阐述,表明在一些块体的边界区域,虽然位移速率较低,但仍有可能发生较大地震。
Combined with the tectonic background,and according to the calculation results of the focal mechanism solution of earthquakes in the eastern region of Balyanlkalla Block,we get the field stress state of three different area,and confirmed the theoretical mechanics background of 'escaping to eastern'of Balyanlkalla Block.On the basis of analyzing the interaction theory of block structure,we try to interpret and infer the seismic properties and the forming reason of their stress state in different region.In addition,we elaborate the influence of Wenchuan MS8.0 earthquake on the regional structure.The results showthat although the displacement rate is very lowin some blocks border area,there still may occur large earthquake.
出处
《地震研究》
CSCD
北大核心
2014年第S1期28-33,共6页
Journal of Seismological Research
基金
青海省地震基金(2012A01)
青海省工程地震研究院(2012)
地震科技星火计划项目(XH13024Y)联合资助
关键词
汶川地震
巴颜喀拉地块
应力场
震源机制解
Wenchuan MS8.0 earthquake
Balyanlkalla Block
field stress state
structure interaction
