Abstract: The Yan-Huai basin consists of four minor basins, namely, Yanqing, Huailai, Zhuo-lu and Fanshan basins. This region has been subjected to a progressive subsidence since Neogene. It may be regarded as a typical region for seismogeological study owing to great development of Quaternary sediments, sharp contrast in relief, concentration of historic earthquakes and distinct neotectonic movements.Six neotectonic categories may be recognized in the region under study basing upon the sedimentary history, geomorphological features and geophysical fields. In addition, a preliminary analysis of the seismic trend of the whole region is also made in the light of the different neotectonic activities, both young and old structural frameworks, and historic earthquakes.

摘要： 延-怀盆地属新生代断陷盆地。本文据第四纪沉积、地貌特征、地球物理和历史地震等资料,对本区之新构造划分为六个类型,又根据每个类型的活动程度,结合新、老构造格局和地震活动性,对本区地震活动趋势作了初步分析。