黄河中下游活动断层分布及其对古河道变迁的影响

黄河流域是我国遭受地震灾害最为严重的流域，近年来探测工作对黄河中下游的活动断层有较多新认识，如构成北华北盆地与南华北盆地新构造分界的新乡-商丘断裂，新发现存在多个晚更新世活动段，具备发生中强级以上地震的可能，对识别沿黄河中下游的地震危险源、提高地震危险性认识有重要影响。本文通过总结近年来活动断层探测的最新进展，分析了沿黄河中下游地区的活动断层分布特征及其可能产生的灾害影响，并提出后续工作规划建议。

The Distribution of Active Faults in the Middle and Lower Reaches of the Yellow River and its Influence on the Change of Palaeostream

The Yellow River Basin is the one suffered by the most serious earthquake disaster in China. In recent years, a series of researches have been carried out on active faults in the middle and lower reaches of the Yellow River and achieved many new understandings. For example, new studies revealed that the Xinxiang-Shangqiu fault, which represents the neotectonic boundary between the North China Basin and the Suthern North China Basin, has several Late Pleistocene active segments with the possibility of moderately strong earthquake activity. This new opinion is important for understanding the earthquake hazard source and evaluating the earthquake hazard in the middle and lower reaches of the Yellow River. In this paper, according to theses up-to-date research progress, we have determined the distribution of active faults in the middle and lower reaches of the Yellow River, discussed its disaster effects, and proposed suggestions for further work.