拉萨盆地隐伏断裂浅层反射地震探测及断层活动性分析  

Shallow Seismic Reflect Exploration and Fault Activity Analysis of the Buried Faults within Lhasa Basin

作　　者：谢平 杨歧焱 尤惠川[3] 周月玲[4] 许亮 XIE Ping;YANG Qiyan;YOU Huichuan;ZHOU Yueling;XU Liang(Earthquake Administration of Tibet Autonomous Region, Lhasa 850000, P.R.China;Exploration Technology and Engineering College, Hebei GEO University,Shijiazhuang 050031, P.R.China;Institute of Geophysics, China Earthquake Administration, Beijing 100081, P.R.China;Earthquake Administration of Hebei Province, Shijiazhuang 050021, P.R.China)

机构地区：[1]西藏自治区地震局,拉萨850000 [2]河北地质大学勘查技术与工程学院,石家庄050031 [3]中国地震局地球物理研究所,北京100081 [4]河北省地震局,石家庄050021

出　　处：《科学技术与工程》2017年第36期8-15,共8页Science Technology and Engineering

基　　金：中国数字地震观测网络工程(1-4-11)资助

摘　　要：为探测拉萨山间盆地隐伏活动断裂,采用人工震源的浅层地震勘探方法,提出了该地区地质条件下隐伏断裂勘探时震源选择、观测系统设计以及参数确定、数据处理与资料解释、断层识别的基本方法,查明了娘热断裂、那林拉卡断裂、拉萨断裂、夺底断裂的走向、倾向、上断点埋深及其在地表的垂直投影位置等主要参数,探测表明拉萨市城近地区发育有娘热、那林拉卡、拉萨、夺底等4条北西-北西西向断裂;娘热断裂和夺底断裂近垂直或高角度北倾,为逆走滑或走滑断层;那林拉卡断裂和拉萨断裂近垂直或高角度南倾为主,也是逆走滑断层;娘热、那林拉卡、拉萨、夺底等4条断裂均为晚更新世活动断层,平均垂直滑动速率为0.27~0.40 mm/a。为拉萨盆地及周边地区活动断层研究提供了基础资料,填补了该地区浅层地震勘探资料的空白。Based on the artificial source of shallow seismic acquisition method the active faults buried within Lhasa inter-mountain basin is detected.The key technical problems are discussed for seismic profiling of buried faults in this geological condition.The choice of seismic instruments,scheme design,parameter selection,data processing,data interpretation and the method of fault recognition are put forward.The main parameters such as strike,dip direction,upper break-point and so on were ascertain in Niangre fracture,Nalinlaka fracture,Lhasa fracture and Duodi fracture,providing the first information for active fault research in Lhasa area.

关 键 词：隐伏断裂 山间盆地 地震勘探 拉萨 

分 类 号：P631.4[天文地球—地质矿产勘探] P553[天文地球—地质学]