地质学报2017，Vol.91Issue(10)：2175-2184,10.
芦山Ms7.0地震前龙门山断裂带西南段区域形变特征分析及发震模型探讨
Regional Deformation Characteristics in the Southwestern Segment of Longmen Mountain Fault Zone before Lushan Ms7.0 Earthquake and Possibly Induced Earthquake Model
摘要
Abstract
The regional deformation characteristics of the southwestern segment of Longmen Mountain Fault Zone before the Lushan Ms7.0 earthquake were analyzed by using the precise re-leveling data in 2010 and 2013.The results indicate that the vertical deformation rate of the Tianquan-Luding area in the southwestern part of the Longmen Mountain Fault Zone was 6～8 mm /a,which was far higher than that of this region before the Wenchuan Ms8.0 earthquake.The Wenchuan Ms8.0 earthquake accelerated accumulation of the Coulomb stress value in the research area before occurrence of Lushan Ms7.0earthquake.The vertical deformation rate of the Ya'an-Mingshan area close to the Sichuan Basin was-3～-6 mm/a.In terms of the rupture zone and aftershock distribution induced by the Lushan earthquake and Wenchuan earthquake,a "seismic gap" between two earthquakes might accelerate stress accumulation.Therefore,monitoring the "seismic gap" and earthquake prediction should be strengthened.关键词
芦山地震/龙门山断裂带/精密水准/形变分析/发震模型Key words
Lushan earthquake/Longmen Mountain Fault Zone/Precise re-leveling data/Deformation analysis/Earthquake model引用本文复制引用
徐东卓,焦守涛,朱传宝,孙非非,管见,尹海权..芦山Ms7.0地震前龙门山断裂带西南段区域形变特征分析及发震模型探讨[J].地质学报,2017,91(10):2175-2184,10.基金项目
本文为科技部基础性工作项目(编号:2015FY210400)和中国地震局“三结合”项目(编号:CEA-JC/3JH-163704)联合资助的成果. （编号:2015FY210400）
