【摘要】 <正> 一、断裂带的轮廓红山一八里罕断裂带,南起宁城头道营子北止于赤峰红山(乌敦套海)附近,总体走向北东一北北东,全长220公里,切穿阴山东西向构造带的鲁努儿虎山脉,跨越了华北准地台区与内蒙兴安华力西褶皱带及介于其间的华力西期的更多还原

【Abstract】 The Hongshan-Balihan fault zone remains to be active over a long period and its mechanical property undergoes changes since late Jurassic. During late Jurassic-early Cretaceous, its mechanical property was shear-tensional. At the end of early Cretaceous, it was shear-pressuring. In late Cretaceous-Neogene, it was shear-tensional. Since mid-Pleistocene, it has been shear-tensional.The Hongshan-Balihan fault zone has undergone recently strong faulting which led to earthquake occurrences. Seismicity is strong at its southern segment and weak at its northern segment. The difference between the two segments is due to their diffenent medium properties. The above-mentioned should be taken into consideration when discussing seismic zoning and also when identifying earthquake intensity in the region.更多还原