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根据邢台7-2 级和6-8 级地震震中区的浅层和超浅层地震勘探结果,查明了震中区浅部铲形断裂的性质及活动年代,认为新河断裂(F1) 自晚更新世以来已不再活动,它不是发震断裂。另外,结合该区深地震反射剖面和深地震测深剖面结果,讨论了震中区的深浅部构造形态及它们的相互关系,从而确定了发震断裂应为震源之下的高倾角超壳断裂①。邢台地震的发生是由于地幔岩浆的上侵作用产生附加应力场,并与区域构造应力场共同作用使该断裂重新活动,引发了邢台地震,并引起浅部断层及地表物质的运动。
According to the shallow and ultra-shallow seismic exploration results of the epicentral regions of the 7-2 and 6-8 earthquakes in Xingtai, the nature and age of shallow shoal-shaped faults in the epicenter area were ascertained. Since the Xinhe fault (F1) It has ceased to be active since the Pleistocene, and it is not an epicenter. In addition, combined with the deep seismic reflection profile and the deep seismic sounding profile in this area, the structures of the deep and shallow parts in the epicenter area are discussed and their correlations are discussed. It is thus confirmed that the seismogenic fault should be a high-angle crustal fault with a high dip angle . The occurrence of Xingtai earthquake is caused by the mantle magma uplifting to produce additional stress field and reactivates the fault with the tectonic stress field in the region, triggering the Xingtai earthquake and causing the movement of shallow faults and surface materials.