摘要
据野外构造地貌调查、浅层地震物探、钻孔和深埋隧洞施工地质资料,揭示了龙蟠—乔后断裂九河—雄古段的几何结构.九河—雄古段发育有线性山脊、断层槽地及断层陡崖,据构造地貌分析认为在盆地的西、中和东部各有一条断层发育.L1~L44条浅层地震物探剖面揭示出多条断层,与盆地的西侧和中部断层相对应,上断点埋深6~9 m.钻孔和深埋隧洞施工地质均揭露盆地西、中和东部断层的断层角砾岩、碎裂岩等,充分证明地貌推测的3条断层的存在.单条断层破碎带宽60~140 m,与桃源段断层破碎带宽度类似.依据构造地貌推测的断层展布与物探、钻孔、隧洞揭示的具有高度的一致性.
According to the field tectonic geomorphic survey,shallow seismic geophysical exploration,drilling and construction geology of deep buried tunnel data,the geometric structure of Jiuhe-Xionggu segment of Longpan-Qiaohou fault is revealed.There are linear ridges,fault troughs and fault scarps in Jiuhe-Xionggu section.There is respectivelya fault in the west,middle and east of the basin according to the analysis of tectonic geomorphology.The four shallow seismic geophysical profiles of L1-L4 reveal multiple faults,corresponding to the west and central faults of the basin,and the buried depth of the upper breakpoint is 6-9 m.The drilling data and deep tunnel construction geology reveal fault breccias and cataclasts of the west,middle and east faults of the basin,fully proving the existence of the three inferred faults.The fracture width of a single fault is 60-140 m,similar to that of the fault fracture zone in Taoyuan section.The fault distribution inferred from the tectonic geomorphology is highly consistent with that revealed by geophysical prospecting,drilling and tunneling.
作者
常祖峰
赵恒
李鉴林
阿拉塔
周云
CHANG Zu-feng;ZHAO Heng;LI Jian-lin;A La-ta;ZHOU Yun(Yunnan Earthquake Agency,Kunming 650224,Yunnan,China;Three Gorges Geotechnical Consultants Corporation,Limited,Wuhan 430074,Hubei,China)
出处
《云南大学学报（自然科学版）》
CAS
CSCD
北大核心
2023年第S01期206-214,共9页
Journal of Yunnan University(Natural Sciences Edition)
基金
国家自然科学基金(U2002211)
科技基础资源调查专项(2021FY100100).
关键词
断层几何结构
左旋走滑
线性山脊
浅层地震
深埋隧洞
fault geometry
left lateral strike-slip
linear ridge
shallow seismic geophysical exploration
deep buried tunnel
作者简介
通信作者:常祖峰(1966-),男,湖南人,研究员,主要研究地震活动构造.E-mail:zufch@163.com.
