【摘要】 地震变形构造主要包括小级别的张性或压性断层、不协调的软沉积物变形褶皱等,这些变形构造以震动变形作用为特点从而成为识别和定义地震岩的主要标志。在河北宣化一带的高于庄组第三段下部的白云质灰岩或灰质白云岩层之中,发育了极为典型的地震变形构造,包括层内断层、层内褶皱以及极为典型的碎裂角砾岩等。高于庄组第三段地震变形构造的发现,为探索和研究地震作用对沉积岩层的破坏和改造而区分于其他的事件沉积如海啸沉积和风暴沉积提供了极为重要的实例,也为更加深入理解高于庄组第三段非叠层石碳酸盐岩沉积序列的产出背景提供了重要资料。更多还原

【Abstract】 Earthquake-induced deformational structures mainly include the small-grade tensional or compressional fault,the inconsistent fold of soft sediment,which are marked by shock deformation;thus,these structures become the main discerning marks for seismites.Many typical earthquake-induced deformational structures developed in the third member of Mesoproterozoic Gaoyuzhuang Formation in Xuanhua County of Hebei Province,and these structures include the obvious intrastratal fault,the intrastratal fold and the cataclastic breccia and so on.The earthquake-induced structure in the third member of Mesoproterozoic Gaoyuzhuang Formation provides an important example for both the study on not only the reconstruction and the destruction of depositional rock beds generated by earthquake but also the distinguishability from other event deposits such as the storm and the tsunami deposits,and also provides an important information for the formation setting of the third member of Gaoyuzhuang Formation that is marked by a nonstromatolitic succession of the Precambrian.更多还原