摘要
通过野外地震地质调查,在甘肃省古浪县、景泰县交界处的长岭山地区新发现了丰富的线状分布的地震地表破裂现象,表现为基岩崩塌、黄土滑坡、地震裂缝、地震土林、地震沟槽、陷落坑以及断层陡坎等,局部可见残留的破裂滑动自由面。其分布严格受长岭山北麓活动断裂控制。通过地震地表破裂带本身的特征分析、年代学分析、地表破裂带长度与震级的拟合关系以及结合区域活动断裂资料研究,认为该地震地表破裂带可能为1927年古浪8.0级地震的产物。
Based on the seismo-geological field investigation, a co-seismic surface rupture zone in Changlingshan area, Gansu province, was discoved recently. The rupture phenomena include： rock collapse, landslip, downthrown-pit, earthquake slot, uplift, scarplet, earthquake fissure and so on. The distribution of the rupture zone is controled strictly by Changlingshan Northern Piedmont Fault. Through the comprehensive research on the characters of the rupture zone, TL age testing, data of the regional active tectonics and the relationship between rupture zone lengths and earthquake magnitudes, it is considered that this rupture zone was caused by Gulang Ms 8.0 earthquake in 1927.
出处
《西北地震学报》
CSCD
北大核心
2006年第4期319-326,共8页
Northwestern Seismological Journal
作者简介
柳煜（1975-）,男（汉族）,甘肃徽县人,硕士,主要从事活动构造研究及地震工程安全性评价工作．
