摘要
通过卫星影象处理技术得到的唐山震区卫片清晰地显示出一组北西向线性影象。其反映的隐伏断裂构造表现为大规模左旋走滑运动及捩断运动特征。断裂构造的新活动对地形,地质地貌及深部构造等方面产生了不同程度的影响,现代活动也有明显表现。它代表了本区的最新构造活动,是区域构造演化的产物。卫星影象反映的唐山震区北西向隐伏断裂及其表现特征,促进我们进一步认识唐山地震(1976年7月28日Ms7.8)的发震构造。北东与北西向断裂的交汇引起应力集中,最终导致地震的发生。
The processed satellite picture shows obviously a group of NW direction linear images in Tangshan seismic country, which reflect hidden faults that are noted for a large scale of left lateral slip movement and wrench faulting movement. The new activity of the faults affect respectively on topography, geological landforms and deep structure, also on the acttivity of recent tectonic movent. It is due to the evolution of regional tectonic movement. The NW direction hidden faults make us recoganize further the quake generating structure of the Tangshan earthquake (1979, 7, 28, M7. 8). The stress concentration on the intersection between NE and NW direction faults resulted in the earthquake finally.
出处
《华北地震科学》
北大核心
1990年第4期1-9,共9页
North China Earthquake Sciences
