Abstract: This paper deals with tectonic features and seismicity for the Tancheng-Lujiang fault belt in terms of aeromagnetic data.Some hidden segments of this fault belt,south of Tancheng,are discussed by use of aeromagnetic data in large and moderate scale. The Changyi-Daidian fault and An-qiu-Juxian fault are considered to be a main fault on the studied fault and they have extended down to the upper mantle.The author tries to find out the law for strong seismic activity. It may provide another base for modifying the location of the epicenter of 1668 earthquake of magnitude 8.5.

摘要： 本文应用航空磁测资料及其它地球物理资料,研究郯庐断裂带的构造特征与强震活动。文章具体地记述了郯庐断裂带的位置、展布及深部延伸情况等。对郯城以南隐伏断裂地段,用大、中比例尺航磁资料进行了研究。认为昌邑-大店断裂和安丘-莒县断裂是郯庐断裂带的主断裂,延伸到玄武岩层后合并进入地幔。最后,文章通去磁异常(场)特征,探索强震活动规律,并为1668年8.5级地震震中位置的修正提供了补充依据。