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地震 ›› 2000, Vol. 20 ›› Issue (4): 50-56.

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华北地区壳内磁性构造与地震的探讨

张先, 刘敏, 赵丽   

  1. 中国地震局地球物理勘探中心, 河南 郑州 450002
  • 收稿日期:1999-11-22 修回日期:2000-03-21 出版日期:2000-10-31 发布日期:2022-09-22
  • 作者简介:张先 (1945-),男,河南开封人,高级工程师,主要从事震区深部磁性构造及孕震环境和地震成因的研究。
  • 基金资助:
    国家自然科学基金 (49774230)资助; 中国地震局地球物理勘探中心科研成果 (RCEG 20004)

Crustal magnetic structure and earthquakes in North China

Zhang Xian, Liu Min, Zhao Li   

  1. Research Center of Exploration Geophysics, CSB, Zhengzhou 450002, China
  • Received:1999-11-22 Revised:2000-03-21 Online:2000-10-31 Published:2022-09-22

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摘要： 通过带通滤波技术对华北地区航磁异常进行处理,分离出深、浅部磁性层异常, 然后运用视磁化强度反演方法和程序,对组成上下磁性层的构造块体进行了圈定, 并结合人工地壳测深及深部流体研究进行了讨论,认为地震是构造块体相互作用、应力积累、能量释放的结果,深部流体为多层次滑脱构造的生成及地震能的积累提供了可能。

关键词: 磁性构造, 视磁化强度, 深部流体, 地震成因

Abstract: In this paper, aeromagnetic anomaly is processed with band-pass filtering technique, and deep /shallow magnetospheric anomaly is discerned. Then the tectonic blocks forming the upper and lower magnetospheres are delimited by using apparent magnetic intensity inverse method and procedure. After an investigation in the light of DSS and deep fluid study, we conclude that earthquakes result from interaction of tectonic blocks, stress accumulation and energy release; deep fluid provides the possibilities to form the multi-layered decollement and seismic energy accumulation.

Key words: Magnetic structure, Apparent magnetic intensity, Deep fluid, Seismogenesis

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