成都理工大学学报（自然科学版）2017，Vol.44Issue(6)：641-648,8.DOI:10.3969/j.issn.1671-9727.2017.06.01
九寨沟Ms 7.0级地震的左旋走滑作用与动力机制
Left-lateral strike-slip effect and dynamic mechanism of the Jiuzhaigou Ms 7.0 earthquake in the eastern margin of Tibetan Plateau, China
摘要
Abstract
The Jiuzhaigou Ms 7.0 earthquake in 2017 occurred in the eastern margin of the Tibetan Plateau after the Wenchuan Ms 8.0 earthquake in 2008 and the Lushan Ms 7.0 earthquake in 2013.Comprehensive analysis of seismic source mechanism solution of the earthquake,historical earthquakes,distribution of aftershocks and historical earthquake,regional stress field,active faults are carried out in order to unravel the seismogenic structures and dynamic mechanism of the Ms 7.0 Jiuzhaigou earthquake.The preliminary research shows that:(1) The epicenter of the earthquake is located in the intersection area among the Tazan fault,the Minjiang fault and the Huya fault,and the intersection position of active faults has a controlling effect on the occurrence of the strong earthquake.(2) The seismogenic fault of the earthquake is Huya fault a NNW-trending fault with a large tilting angle,characteristic of a high dipping angle,sinistral strike-slip earthquake.(3) The earthquake is located in seismic gap inthe northern part of the northern segment of the Huya fault,filled the seismic gap of over Mw 6.0 earthquakes in 1973 and 1976.(4) The earthquake is located in the Coulomb stress increase area of Wenchuan Ms 8.0 earthquake,and it is likely that the earthquake is the results of stress transmission of Wenchuan earthquake.(5) The earthquake is located in thenortheastern part of the Bayankala Block,and the dynamic mechanism of the earthquake is the northeastward extrusion of lower crustal flow in the eastern margin of the Tibetan Plateau.关键词
青藏高原东缘/九寨沟地震/左旋走滑/动力机制Key words
eastern margin of Tibetan Plateau/Jiuzhaigou Ms 7.0 earthquake/sinistral strike-slip/dynamic mechanism分类
天文与地球科学引用本文复制引用
李勇,王伟明,邵崇建,李芃宇,周荣军,刘玉法,张威,马超,颜照坤,闫亮..九寨沟Ms 7.0级地震的左旋走滑作用与动力机制[J].成都理工大学学报（自然科学版）,2017,44(6):641-648,8.基金项目
国家自然科学基金项目(40841010,40972083,41172162,41372114,41340005) （40841010,40972083,41172162,41372114,41340005）
国土资源部地质调查项目(1212011121268) （1212011121268）
油气藏地质及开发工程国家重点实验室研究项目(SK-0801). （SK-0801）
