CAJ | 학술논문

研究了2008年汶川大地震的发震构造龙门山构造带的北段,即北川-南坝-林庵寺断裂的地表破裂.通过黄家坝、桂溪、平通、南坝、石坎子等地的考察和测量,显示该段地表破裂沿断裂带连续分布,走向为N45°～65°E.垂直位错与水平位错比值从西南段黄家坝的2.8:1逐渐降低到北东段南坝、石坎子的0.9:1.地表破裂特征表明,断裂以右旋走滑分量为主,并具有较高的逆冲分量.余震分布表明,青川断裂与北川-南坝-林庵寺断裂之间可能存在隐伏活动断裂.
연구료2008년문천대지진적발진구조룡문산구조대적북단,즉북천-남패-림암사단렬적지표파렬.통과황가패、계계、평통、남패、석감자등지적고찰화측량,현시해단지표파렬연단렬대련속분포,주향위N45°～65°E.수직위착여수평위착비치종서남단황가패적2.8:1축점강저도북동단남패、석감자적0.9:1.지표파렬특정표명,단렬이우선주활분량위주,병구유교고적역충분량.여진분포표명,청천단렬여북천-남패-림암사단렬지간가능존재은복활동단렬.
The Surface rupture of Beichuan-Nanba-Linanshi Fault, which is the northern seg-ment of Longmenshan tectonic belt is studied. Observation at Huangjiaba,Guixi, Pingtong, Nan-ba and Shikanzi suggests that the surface ruptures on this segment spread continuously along the trend of the fault with N45°～65°E in general. The rate of vertical offset and horizontal offset be-come small from Huangjiaba(2.8:1) to Shikanzi (0.9:1). Features of surface rupture indicate that the fault movement is thrusts with dextral strike-slip. Distribution of aftershocks indicates that the area between Beichuan-Nanba-Linanshi Fault and Qingchuan Fault probably have a buried active fault.