长江中游砂山形成的年代及成因研究  

TIME AND CAUSE OF FORMATION OF SAND-DUNE IN MIDDLE REACHES OF THE YANGTZE RIVER

作　　者：杨超[1] 黄长生 李长安[1] 赵欣[1] 

机构地区：[1]中国地质大学,武汉430074 [2]江西环境地质监测总局,南昌330000

出　　处：《地质力学学报》2003年第2期176-182,共7页Journal of Geomechanics

基　　金：国家自然科学基金(编号:40172061);国土资源部区调项目"长江中游水患区环境地质调查"项目资助(编号:19991230003014)。

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。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.

关 键 词：长江中游 砂山 扫描电镜 晚更新世 风成成因 

分 类 号：P534.631[天文地球—第四纪地质学]