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对山东省沂水县大水场断层剖面的断层泥带进行了野外观测和ESR 测年。断层泥的ESR年龄与由其穿插关系等判断出的断层活动次序相符。各断层泥的ESR 年龄显示出大水场断层经历了两个活动较频繁的时段,即0-25～0-28Ma B-P- 和0-45～0-55Ma B.P.。
Field observation and ESR dating of the fault mud belt of the Dashuichang fault section in Yishui County, Shandong Province were carried out. The ESR ages of fault muds are in accordance with the order of fault activities judged by their interpenetration relations. The ESR ages of the fault muds show that the fault of the Dachenchang has experienced two periods of relatively frequent activities, 0-25-0-28Ma B-P- and 0-45-0-55Ma B.P.