江西科学2025，Vol.43Issue(6)：1015-1022,8.DOI:10.13990/j.issn1001-3679.2025.06.002
鄱阳湖北部砂山一处含泥纹砂层的粒度分析及其环境指示意义
Grain Size Analysis of Sand Layer with Mud Laminae within A Sand Hill in the Northern Poyang Lake Region and Its Implications to Sedimentary Environment
摘要
Abstract
Poyang Lake is the largest freshwater lake in China.At present,several sand hills are distributed around Poyang Lake.Although many studies suggest that these sand hills have mainly been formed through aeolian processes,in this study,a sand layer with obvious mud laminae and mud clasts is identified within a sand hill at Shazhou Village in Hukou county,Jiangxi province.To further investigate the origin of this sand layer,two samples(20231231-1 and 20240106-2)were collected for grain size analysis.The results are as follows:both samples are dominated by medium sand and are poorly sorted.The frequency distribution curves of the two samples show a clear bimodal pattern,with the main peak at medium sand and a secondary peak at silt.The grain-size probability cumulative curves of both samples show that the sand layer comprises one traction population,two saltation pop-ulations,and four suspension populations.Furthermore,the Sahu discriminant formula val-ues were both significantly greater than-2.74.The results further demonstrate that the sand layer was formed by a water-laid process rather than by an aeolian process.Our study shows that,in addition to aeolian deposits,water-laid deposits have also been developed and preserved within the sand hill.关键词
鄱阳湖/砂山/粒度/含泥纹砂层/水成堆积层Key words
Poyang Lake/sand hill/grain size/sand layer with mud laminae/water-laid sediment分类
社会科学引用本文复制引用
ZHANG Zhengyu,GONG Zhijun,LUO Ming,PENG Huaming..鄱阳湖北部砂山一处含泥纹砂层的粒度分析及其环境指示意义[J].江西科学,2025,43(6):1015-1022,8.基金项目
江西省教育厅科学技术研究资助项目(GJJ160573) （GJJ160573）
地震灾害科学普及研究项目(G20200002) （G20200002）
东华理工大学博士科研启动基金项目(DHBK2016121). （DHBK2016121）
