成都断陷区活动断裂带基本特征及其潜在地震能力的判定

• 作 者: 唐荣昌 黄祖智 钱洪 龚宇 文德华 马声浩 周荣军
• 机 构: 四川省地震局
• 出 处: 中国地震
• 发表日期: 1996年03期
• 关键词: 活动断裂带 晚第四纪 断陷盆地 隐伏断裂 控制作用 逆冲 运动性质 龙泉 和龙 拗陷

成都断陷是龙门山前缘重要的第四纪构造盆地。龙门山前山断裂和龙泉山西坡断裂对断陷盆地的形成和演化有重要的控制作用。晚第四纪时，成都断陷遭受北西－南东向的挤压，使断陷盆地边缘和内部的北东、北北东向断裂具逆冲运动性质，并导致龙门山前山断裂、龙泉山西坡断裂和蒲江－新津－成都－德阳断裂上中、强地震的发生。研究表明，上述３条断裂均具有发生中强地震的潜在能力。

The Chengdu fault depression is an important Quaternary tectonic basin on the front of the Longmen Piedmont. The Longmenshan fault and the western slope of Longquanshan have an important role in controlling the formation and evolution of fault basins. In the late Quaternary, the Chengdu fault depression was subjected to the northwest-south-east extrusion, resulting in the thrust movement of NE and NE faults in the margin and interior of the fault depression basin, resulting in the rupture of the Longmenshan Qianshan fault and the Longquan Shanxi Slope and Pujiang - Xinjin - Chengdu - Deyang fault occurred in the strong earthquake. The research shows that the above three faults all have the potential ability to produce moderate-strong earthquakes.