【摘要】 以大凌河隐伏断裂为实例，根据断裂位于大凌河床底部的特点，通过对比河流（ 断裂） 两侧的第四纪地层和阶地，对隐伏断裂的活动性进行研究。孢粉分析和１４Ｃ 测年数据表明，大凌河大榆树堡—凌海市段一级阶地形成于晚更新世至全新世，二级阶地形成于晚更新世，三级阶地形成于中更新世至晚更新世早期。经测量河流两侧相对应的同级阶地面处在相同的高度上，证明自晚更新世大凌河三级阶地形成以来位于大凌河床底部的隐伏断裂没有过活动。晚更新世以来这一地区的地壳平均上升速率为０－２０ ～０－２８ ｍ ｍ／ａ。更多还原

【Abstract】 The Dalinghe hidden fault,as an example in this paper,is just located under the Dalinghe river,so the activity of this hidden fault can be defined by comparing Quaternary layers and terraces beside the river (hidden fault).Based on spore analysis of 17 layers and several 14 C chronological data,the T\-1 terrace of Dalinghe river section from Dayushupu to Linghai city is formed between Q 3 and Q 4;T\-2 formed in Q 3;T\-3 formed between Q 2 and Q 1 3.The same grade terrace height beside the river is surveyed at almost the same level,proved that the hidden fault under the river never moved after Q 3 when T 3 formed.The average crust up rate in this area from Q 3 till now is 0 20～0 28?mm/a.更多还原