冀中坳陷衡水转换断裂带特征及演化

Characteristics and evolution of Hengshui transfer fault zones in Jizhong depression

  • 摘要: 冀中坳陷衡水断裂带具有构造调节转换带性质,它明显地将坳陷分为南北两区。本文从区域构造环境出发,通过对该调节转换带构造格局及演化进行分析,认为该调节转换带经历了中、新生代两个不同特征演化阶段的复杂发展改造过程。燕山中晚期以东西向构造发育为其特征,而早第三纪则为北西西向构造发育阶段。其中早第三纪阶段又可依据沉积、构造发育特征分为Es4+Ek,Es2 +Es3 和Es1+Ed 3个演化时期。现今构造特征是近东西向与北西西向两期构造相互叠加改造的综合体现。

     

    Abstract: In Jizhong depression, Hengshui fault zone is of characteristics of transfer zones, which divided the depression into two north and south regions. By the research on the structure settings of the situated region, the characteristics and its evolution of the fault, it is concluded that the transfer zone gets though two different evolution periods, that is, Mesozoic period (near East-West) and Cenozoic period (North-West-West). The Cenozoic period can be divided into three evolution steps (Es4 +Ek, Es2+Es3, Es1+Ed), based on their characteristics of deposition and structural development. Modern structure appearance is formed by the superimposed function, reformation, restriction and accommodation of two evolution periods.

     

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