风成堆积中不同粒径主要化学元素分布规律的初步研究  

A PRELIMINARY STUDY ON THE MAIN CHEMICAL ELEMENTS DISTRIBUTIONS OF THE DIFFERENT PARTICLES IN EOLIAN DEPOSITION

作　　者：杨得福[1] 彭淑贞[1] 

机构地区：[1]泰安师范专科学校地理旅游系,山东泰安271000

出　　处：《山东农业大学学报（自然科学版）》2001年第2期152-156,共5页Journal of Shandong Agricultural University：Natural Science Edition

摘　　要：本文将基本未经历风化的黄土和成壤较强的古土壤分离成 6个粒级后进行化学分析 ,结果表明 ,主要元素的氧化物及其比值随颗粒变化均表现出明显的规律性 ;考虑到各元素化学活动性和研究区自然条件 ,指出黄土—古土壤全岩的SiO2 /Al2 O3 、Fet/Al2 O3 和SiO2 /TiO2 (>5 μm)分子比反映了原始风尘颗粒大小 ,而古土壤和黄土Fe2 O3 /FeO值的差异更多地反映风尘堆积区的化学风化强度。The representative loess and paleosol samples were separated into six different grain size based on Stokes's law Then the main chemical elements of the grain size separation were tested and analyzed systematically in this paper The results showed the oxides of the main elements and his ratios varied regularly with the grain size Based on the stability the chemical elements and the natural conditions of study sites,The ratios of SiO 2/Al 2O 3、Fet/Al 2O 3 and SiO 2/TiO 2 (>5μm) of the loess-paleosol reflected the size of original eolian particle,and the ratio of Fe 2O 3/FeO reflected the strengthing of the weathering in the eolian deposition sites

关 键 词：地球化学元素 粒度 风化 黄土 古土壤 分布规律 古气候学 

分 类 号：S155.24[农业科学—土壤学] P595[农业科学—农业基础科学]