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一、前言当我们研究华北地震带时,发现处于燕山隆起的南斜坡带是个独特的构造地块和重要的次级构造单元,有别于其南的华北平原区。根据地震地质、地震工程及矿产勘查的新成果,对这一地区的构造格局与地震活动应重新认识,以往学者将斜坡带作为北西西向的断裂构造带与以弱震呈北西西向带状展布的地震带对待。应指出这个带既是活动构造带又是强震带,处于津京唐经济发达地区,也是首都地震活动监视圈的范围,因此对其详细
I. Preface When we study the North China seismic belt, we find that the southern slope belt in the Yanshan uplift is a unique tectonic block and an important secondary structural unit, different from the southern North China Plain. According to the new results of seismic geology, seismic engineering and mineral prospecting, the tectonic framework and seismicity in this area should be re-recognized. In the past, scholars used the slope belt as a NW-trending fault structure belt and a NW-trending belt distribution with weak earthquakes Seismic zone treatment. It should be pointed out that this zone is both an active tectonic zone and a strong seismic zone, which is located in the economically developed area of Tianjin Jingtang and also the seismic activity watch ring of the capital, so its detailed