非同沉积断裂活动对邻断裂岩层厚度变化的控制作用

以露头尺度构造现象、物探成果图件、模型模拟实验及国内外有关文献资料为依据,探讨了由非同沉积断裂活动导致的、发生在邻断裂场所的岩层厚度变化的现象及规律。其表现特征为:在正断层作用下,上盘岩层发生增厚,下盘岩层出现减薄;在逆断层作用下,出现的情况正好相反;平移或走滑断层则在"滑向端"和"滑离端"分别出现增厚及减薄现象。该认识对石油、工程和找矿部门具有实际指导作用,对构造地质学的理论研究具有深化认识的意义。 

CONTROLS OF NON-SYNDEPOSITIONAL FAULTS ON THE CHANGE IN THICKNESS OF STRATA ADJACENT TO FAULTS

This paper discusses the changes in thickness of strata adjacent to faults induced by non-syndepositional faulting according to outcrop-scale structural phenomena,geophysical maps,model experiments and domestic and foreign data. These changes are manifested by the following features: under the action of normal faulting the hanging wall thickens while the footwall thins,but under the action of reverse faulting the reverse is the case;in the case of a strike-slip fault,the thickening and thinning phenomena appear at the "slip-forward end" and "slip-apart end" respectively.This view has practical guidance significance for the petroleum,engineering and mineral prospecting sectors and also deepens the understanding in the theoretical study of structural geology.