滇池盆地东缘白邑-横冲断裂南段的浅层地震勘探研究  

Exploration of Southern Segment of Baiyi-Henchong Fault in the Eastern Dianchi Basin Using Shallow Seismic Survey

作　　者：胡毅力[1] 温一波[2] 段继平 太树刚 王刚 李建有 王朝进 杨江华 

机构地区：[1]云南大学地球物理系,昆明650091 [2]云南大学城建学院,昆明650091 [3]昆明南方地球物理技术开发有限公司,昆明650223

出　　处：《震灾防御技术》2010年第4期451-460,共10页Technology for Earthquake Disaster Prevention

基　　金：云南省自然科学基金(2007DOBM)资助

摘　　要：本文用浅层地震反射波法对可能穿越昆明新城区东部第四系覆盖区的白邑-横冲断裂南段进行了探测,结果表明:采用浅层地震反射波法探测隐伏断层是有效的,在滇池盆地东缘,白邑-横冲断裂南段东支在隐伏区存在,断面接近直立,视倾角约80°,具有高倾角张性正断性质,基岩垂直错距为10—13m,断裂规模由北向南减小;同时,没有发现西支次级断层存在迹象。据土层测龄结果,东支断裂最新活动时代为第四纪中更新世晚期。The shallow seismic reflection exploration is applied to explore the buried southern segment of Baiyi-Henchong fault which is located in the east of New City of Kunming.The exploration reveals that the fault plane is nearly vertical,and the apparent dip is about 80°degree.The vertical displacement is between 10 to 13 meters,and the size of fault becomes smaller from the north to the south.The fault is characterized with a normal tensile fault with high dip angle.No evidence of secondary fault was detected in this survey.The results from dating of soil samples indicate the last faulting activity occurred in the late period of middle Pleistocene.

关 键 词：白邑-横冲断裂 浅层地震勘探 反射波法 隐伏断层 

分 类 号：P631.4[天文地球—地质矿产勘探]