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地震 ›› 2009, Vol. 29 ›› Issue (3): 136-140.

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张家口—渤海断裂带分段活动性研究

方颖, 张晶   

  1. 中国地震局地震预测研究所, 北京 100036
  • 收稿日期:2008-04-11 修回日期:2008-05-26 出版日期:2009-07-31 发布日期:2021-10-18
  • 作者简介:方颖(1970-),女,山东宁津人,副研究员,主要从事地壳形变等研究。
  • 基金资助:
    国家科技支撑计划(2006BAC01B02-02-05)资助

Study of the Segmentary Activities in the Zhangjiakou-Bohai Fault System

FANG Ying, ZHANG Jing   

  1. Institute of Earthquake Science, CEA, Beijing 100036, China
  • Received:2008-04-11 Revised:2008-05-26 Online:2009-07-31 Published:2021-10-18

摘要: 利用GPS资料,用地壳运动强度和大空间尺度变形分析了张家口—渤海断裂带的活动性。 结果表明,燕山地块与华北平原的地壳运动强度以张—渤带为明显的分界线,张-渤带以左旋走滑为主。 通过最小二乘配置对GPS资料进行了空间去噪声处理,并建立球面位错模型,反演了张—渤带的11条断层,结果表明: NW向断层以左旋走滑为主; NE向断层中,活动性最强的是以倾滑为主的沧东断裂。 2001—2004年时段与1999—2001年时段相比,张—渤带中西段、西段断层的走滑量略有减小,而其中东段、东段的走滑量有较大程度增大。 这种现象可能与该区域构造应力场有关。

关键词: 张家口—渤海断裂带, 地壳运动, 断层滑动, GPS

Abstract: The paper analyzes the crustal movement intensity and large spatial deformation of the Zhangjiakou-Bohai fault system using GPS data. The result shows that the Zhangjiakou-Bohai fault system is an obvious crustal movement intensity boundary between the Yanshan block and Huabei plain, and mostly left-lateral strike-slip. The spatial noises in the data have been weakened by least squares collocation and eleven faults are inversed by a spherical dislocation model. It is concluded that faults in the NW direction are mostly left-lateral strike-slip, but the activity of Cangdong faults in the NE direction is the strongest, and mostly dip slip. Compared to the period of 1999—2001, strike-slip in the period of 2001—2004 decreased slightly in the mid-west and west segment, and apparently increased in mid-east and east segment.

Key words: Zhangjiakou-Bohai fault system, Crustal movement, Fault slip, GPS

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