TIMES AND CAUSE OF FORMATION OF SAND-DUNE IN MIDDLE REACHES OF THE YANGTZE RIVER
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摘要: 经野外考察、资料整理分析及实验数据测试等工作,并与有关研究对比,较全面地分析论证了长江中游砂山沉积的风成特征。本次研究首次发现南昌附近的梁家渡古埋藏砂丘剖面,并佐证了武昌青山、湖南岳阳等地的砂层沉积。在此基础上通过年龄测试、扫描电镜观察等确证了砂山的形成时代和风成微观特征,与相关研究综合分析,较深入地论证了长江中游砂山的风成成因。Abstract: By field research,data analysis and experiment data test as wall as comparing with other studys,we determined the aeolic feature of the sand-dune in the middle reaches of the Yangtze River. It is the first time in discovering the profile of Paleoburial sand-dune in Liangjiadu near Wuchang and corroborating sedimentary of sand-layer in Qingshan of Wuchang and in Yueyang of Hunan province.The time and aeolic micro-feature of sand-dune are also proofed by chronometry and scanning electron microscope.
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