学术论文

      桐柏断裂地震勘探资料研究

      Analysis of Tongbai Fault Based on the Seismic Exploration Data

      摘要:
      桐柏断裂是廊固凹陷的北边界,向东延伸与河西务断层相接,向西与北东向的大兴隆起以大角度相交,为廊固凹陷内重要的横向转换断层.浅部地震勘探剖面揭示,桐柏断裂的主断裂走向近东西,其上断点埋深为200 m左右,错断早更新统底界地层,最新活动时代为早更新世;桐柏断裂分支断裂走向近东西,其上断点埋深为150 m左右,错断中更新统底界地层,最新活动时代为中更新世.
      Abstract:
      According to geological section data for the Tongbai fault and the seismic survey line LFZS1 arranged by the Geophysical Exploration Center of the China Earthquake Administration, we determined the Tongbai fault to be the northern boundary fault of the Langgu Sag,which is composed of two parallel faults-a main fault and a branch fault.We then conducted a shallow seis-mic exploration of the Tongbai fault.The shallow seismic exploration profiles reveal that the main fault strikes nearly EW and the buried depth of the upper break point is about 200 m.The latest activity of the main fault occurred in the early Pleistocene.The buried depth of the upper break point of the branch fault is about 150 m and the latest activity occurred in the middle Pleis-tocene.This conclusion provides reference information for seismic safety considerations of impor-tant buildings and urban construction planning around the Tongbai fault.
      Author: FAN Qiang RAN Zhijie ZHOU Yueling MENG Lipeng BIAN Qingkai
      作者单位: 河北省地震局,河北 石家庄,050021
      刊 名: 地震工程学报 ISTICPKU
      年,卷(期): 2017, 39(z1)
      分类号: P631.4
      在线出版日期: 2017年12月12日
      基金项目: 河北省跨断层短水准测量观测场地优化方案研究项目