关键词: 红河断裂带, 第四纪, 演化, 构造地貌

Abstract: 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.

Key words: Honghe fault zone, Quaternary, Evolution, Tectonic-geomorphology