北京大学学报自然科学版 ›› 2020, Vol. 56 ›› Issue (1): 135-142.DOI: 10.13209/j.0479-8023.2019.111

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1119年前郭地震发震构造讨论

邵博1,2, 沈军2,†, 侯贵廷1,†, 于晓辉2,3, 戴训也2, 尉洋2   

  1. 1. 造山带与地壳演化教育部重点实验室, 北京大学地球与空间科学学院, 北京 100871 2. 防灾科技学院综合减灾研究所, 廊坊 065201 3. 中国地震局地质研究所, 北京 100029
  • 收稿日期:2019-01-22 修回日期:2019-08-20 出版日期:2020-01-20 发布日期:2020-01-20
  • 通讯作者: 沈军, E-mail: shenjuneq(at)qq.com, 侯贵廷, E-mail: gthou(at)pku.edu.cn
  • 基金资助:
    中央高校基本科研业务费专项(ZY20160211)、国家自然科学基金(41372216, 41530207)和国家“十三五”重大专项(2016ZX05051004)资助

Discussion on the Seismogenic Structure of Qianguo Earthquake of 1119 AD

SHAO Bo1,2, SHEN Jun2,†, HOU Guiting1,†, YU Xiaohui2,3, DAI Xunye2, YU Yang2   

  1. 1. Key Laboratory of Orogenic Belts and Crustal Evolution (MOE), School of Earth and Space Sciences, Peking University, Beijing 100871
    2. Comprehensive Disaster Reduction Institute, Institute of Disaster Prevention, Langfang 065201 3. Institute of Geology, China Earthquake Administration, Beijing 100029
  • Received:2019-01-22 Revised:2019-08-20 Online:2020-01-20 Published:2020-01-20
  • Contact: SHEN Jun, E-mail: shenjuneq(at)qq.com, HOU Guiting, E-mail: gthou(at)pku.edu.cn

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摘要：

在充分收集和考证前人研究成果的基础上, 深入分析地震史料隐含的约束条件。以石油三维物探、浅层地球物理勘探和联合钻孔探测资料为基础, 结合地质和地貌调查, 研究1119年前郭地震的震中位置和发震构造。在1119年前郭地震的影响范围内, 发现一条区域内规模最大的晚更新世活断层——孤店断裂, 总长度约为66 km, 由两个连续性较好的弧型段组成, 钻孔资料显示其上断点埋深约为24 m, 存在晚更新世以来的断裂活动。经过断层地震危险性评估, 认为孤店断裂可能是1119年前郭地震的发震构造。

关键词: 1119年前郭地震, 历史地震, 发震构造, 震中位置, 孤店断裂

Abstract:

Based on the full collection and textual research on the basis of predecessors’ research results, as well as analysis in-depth of the implicit constraint conditions of the historical earthquake, we study the epicenter of the earthquake location and seismogenic structure, through three-dimensional petrolic geophysical data, the shallow geophysical prospecting and the joint drilling detection, as well as the seismic geological and geomorphic survey. At the same time in the process of detection, within the scope of influence of Qianguo Earthquake of 1119 AD, we found the greatest Late Pleistocene active fault in the zone, named Gudian Fault. The fault is about 66 km long on the seismic profiles from petroleum exploration and consists of two continuous arcs. The buried depth of the fault breakpoint is shallower than 24 m. Through earthquake risk assessment, we judge that the Gudian Fault is most likely the seismogenic structure of the Qianguo earthquake of 1119 AD.

Key words: Qianguo Earthquake of 1119 AD, historical earthquake, seismogenic structure, epicentral position, Gudian Fault

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