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Analysis on Characteristics of Qingyi River Quaternary Terrace in Ya'an Area
Author(s): 
Pages: 137-141
Year: Issue:  1
Journal: Acta Sedimentologica Sinica

Keyword:  青衣江阶地砾石测年构造抬升;
Abstract: 雅安青衣江流域阶地非常发育.通过砾石的岩性、粒度、扁平面的统计,研究区阶地砾石主要来源于青衣江上游地区,在万古场古青衣江流向由北东改为向东,在阳坪现代青农江流向一致为东南,流速有逐渐减小的趋势.根据阶地测年和阶面相对高程分析,从早更新世至全新世本区至少有7次构造抬升,万古场阶地最大抬升幅度达85 m,最大抬升速率为0.532 mm/a,阳坪阶地抬升幅度最大达到52 m,最火抬升速率为1.25 mm/a.
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