Features of Sand-dust Deposits in Harbin City,China

查看全文 作　　者：XIE [1,2]Yuanyun;ZHANG [3]yan;HE [2]Kui;ZHOU [2]Jia;KANG [4,5]Chunguo

机构地区：[1]College of Earth Sciences, Jilin University, Changchun 130061, China;[2]Department of Geography, Harbin Normal University, Harbin 150080, China;[3]Harbin Map Publishing Press, Harbin 150086, China;[4]China University of Geosciences, Wuhan 430074, China;[5]Departmemt of Geography, Harbin Institute, Harbin 150080, China

出　　处：《Chinese Geographical Science》索引2006年第16卷第4期,共7页

基　　金：Under the auspices of Natural Science Fund of Heilongjiang Province (No. G0213), Heilongjiang Province Education Bureau (No. 11511132) 摘　　要：From the sedimentologic view,this paper analyses the grain-size distribution and the chemical composition of the deposits from sand-dust storm,occurring in Harbin on March 20,2002.The result indicates that there exist plentiful coarse matters in the sand-dust deposits in Harbin,and the sand-dust composition presents obvious three peak distribu-tion characteristics,indicating that the sand-dust in Harbin is composed of multi-origin components.The grain-size composition consists of silt(4-8Ф),accounting for 71.18% of the total,sand(>4Ф),21.70%,and clay(<8Ф),only 7.13%.The average grain size(Mz) is 5.14Ф.The chemical elements of the deposits are mainly SiO2 and Al2O3 and Fe2O3,totally occupying 77.8%.The enrichment factors(EF) of Mg,K,Si,Fe,Mn,P,Ti,Co,Ni and V elements are all about 1,which mainly come from lithosphere source,while parts of Cu,Pb,Zn,Cr and Se elements are from pollution sources out of lithosphere source,and As,Cd and Sb elements are mainly from pollution sources.Based on the com-prehensive analysis of grain-size,chemical composition,enrichment factor(EF),discriminant function(DF) and matter source index(PI),this paper points out that the grain-size distribution and element composition of the sand-dust deposits in Harbin are evidently different from the loess and sand-dust in Lanzhou,and that matter source of the sand-dust in Harbin is different from the loess in Northwest China and the sand-dust in Lanzhou.The sand-dust deposits in Harbin are an admixture of coarse grains transmitted in short distance and fine grains transported in long distance.The plentiful coarse grains of the sand-dust deposits in Harbin origin from sand of local spot,and are the near-source deposits transported by low altitude airflow. 关键词：哈尔滨沙尘暴沉积物颗粒成分粒度分布化学成分

相关文献

参考文献（25）
引证文献（5）
耦合文献（627）

参考文献(25)

引证文献(5)

耦合文献(627)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Features of Sand-dust Deposits in Harbin City,China

参考文献(25)

引证文献(5)

耦合文献(627)

用户提示