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本文主要利用短水准观测资料,分析沂沭断裂带的现代活动性质。根据11条跨断裂的短水准测线,1970—1977年的观测资料,计算出各测线处断裂活动的速率,幅度及速度梯度。结果表明活动幅度较大的测线有两处(崔家庄、西溪沂)。该两测线高差变化幅度为千毫米左右,其余大部份测线表现为趋势性微弱活动。 文章最后归纳出三点看法:1.沂沭断裂带处于微弱的近东西向的挤压应力场内。2.北西向的一组断裂现今活动程度强于沂沭断裂带。3。北西向断裂带与沂沭断裂带的交汇处是沂沭带的现今活动部位。
In this paper, we use the short-range observation data to analyze the modern activities of the Yishu fault zone. Based on the 11 short-fault stratigraphic lines across the fault and the observation data from 1970 to 1977, the rate, amplitude and velocity gradient of fault activity at each line were calculated. The results show that there are two major survey lines (Cuijia Zhuang, Xixi Yi). The two survey line height difference of about one thousand millimeters, most of the rest of the line showed a trend of weak activity. The article concludes with three points of view: 1. The Yishu fault zone is in the weak near-east-west compressive stress field. 2. A series of faults in the northwest direction are more active today than the Yishu fault zone. 3. The junction of the NW strike fault and the Yishu fault zone is the current active part of the Yishu belt.