【摘要】 本文根据鲜水河断裂带上开挖的大探槽剖面，研究该断裂在晚更新世晚期以来，在时间和空间上的活动以及相应沉积和堆积物的生成时期，从而分析判定每个古地震事件发生的时期。本探槽中发现有９次古地震事件（含１９７３年７．６级地震），并对古地震的稳定标志和构造楔体的形成及断层错动历史进行了讨论，这对研究古地震的重复间隔，评价一个地区的稳定性是十分有意义的。更多还原

【Abstract】 According to thesection of the big trenching on the Xianshuihe fauh, the space and timefeatures of deposit and accumulation since the later period of Epipleistocene were researched inthis paper. Thereby,we analysed and determinged the occurrence time of each historicalearthquake. We found eleven historical earthquakes from the trenching(including the 1993 M= 7.6 Luhuo earthquake).Furthermore,we discussed the stable mark of historical earthquake,theformation of structure wedge and the history of the fault rub movement.The results are of goodsignificance for reseaching the repeat interval of historical earthquakes and eveluating the stabilityof an area.更多还原