东海浪岗山岛屿黄土的粒度组成及风尘特征  

Grain-Size Distribution and Aeolian Feature of Loess on the Langgangshan Island in East China Sea

作　　者：刘飞[1] 郑祥民[1] 曹希强[2] 

机构地区：[1]华东师范大学教育部地理信息科学重点实验室,上海200062 [2]河南省国土资源科学研究院,郑州450053

出　　处：《华东师范大学学报（自然科学版）》2007年第4期49-55,共7页Journal of East China Normal University(Natural Science)

基　　金：国家自然科学基金(40372135)

摘　　要：通过对东海浪岗山岛屿黄土的系统采样和粒度测试分析,并与其他地方黄土充分对比,讨论了浪岗山第四纪风尘沉积的粒度特征.浪岗山黄土剖面粒度垂向变化不大.小于5μm颗粒平均含量为24.9%.10～50μm粒组富集,分布均匀,符合黄土的风成特性.但粗颗粒(>50μm)含量均超过10%,高于西部黄土的粗颗粒含量.显示该剖面除了接受来自西北内陆的远源风尘物质外,还接受来自沉积区附近的"近源"风尘物质.On the basis of systematic sampling and analysis of grain size of loess on Langgangshan Island in East China Sea, features of component were discussed. The Aeolian dust deposition on Langgangshan Island mainly consists of fine particles（10-50μm） ,which is similar to the component of loess in other sections of China but comparatively coarser. The average con tent of clay is 24.9% and coarse particles （2〉50μm） on Langgangshan Island section is over 10%, which indicates that the materials of source contain proximal aeolian-dust from shelf area of East China Sea in addition to distant aeolian-dust from Northwest China.

关 键 词：黄土 粒度 风尘特征 浪岗山列岛 东海 

分 类 号：P539[天文地球—古生物学与地层学]