红河断裂带第四纪活动的时空演化特征

在前人研究的基础上，结合断裂带沿线的构造地貌、断层岩组合及大量与断裂相关的地层年代，综合分析了红河断裂带第四纪以来活动的总趋势：随着活动时代的趋新，活动中心由南向北逐渐迁移，全新世晚期以来的活动中心位于大理、弥渡一带；探讨了该断裂带第四纪活动的时空演化规律，为断裂带不同区段地震危险性的评估提供了依据

CHARACTERISTICS OF TIME SPACE EVOLUTION OF ACTIVITY IN QUATERNARY ALONG THE HONGHE FAULT ZONE

Since Quaternary, intense activity has occurred along the Honghe fault zone. But its active features in intension, time and form are differential on the different segments of this fault zone. Based on the studies of predecessors, combined with features of tectonic geomorphology, composition of fault materials and a large amount of dating data of strata associated with fault activity, the activity characteristics of the fault and its time space evolution since Quaternary have been studied synthetically for the whole fault zone. The results are: (1) As time goes on, the active center removed gradually from southern to northern segment of the Honghe fault zone, the acitve sites in later Holocene is located near Dali City and Midu county. (2) The active property of the fault zone is different in basins and mountain areas on the same secondary fault, the former is dominant with dip slip and the later is dominant with right lateral strike slip movement. And their activity time is not synchronous too, the active age of former is often newer than the later. (3) On the same segment of the Honghe fault zone, the active ages of range front fault of the Ailaoshan trend to be older than the Zhonggu fault and removes gradually from the former towards the later.