高校地质学报2017，Vol.23Issue(2)：350-358,9.DOI:10.16108/j.issn1006-7493.2016216
基于漫反射光谱的铁氧化物定量分析在南方黄土中的适用性研究
Study on the Application of Quantitative Analysis of Iron Oxides by Diffuse Reflectance Spectroscopy in the Loess of South China
摘要
Abstract
The diffuse reflectance spectroscopy (DRS)has been applied successfully in the Chinese Loess Plateau,but it is not clear whether the DRS can be applied in the South China or not.Therefore,we choose the loess located in the South China to study.In order to determine the content of hematite and goethite,we derived regression equations by removing the free iron from the matrix by CBD and adding different proportions of hematite and goethite into it.Thus,the content of the iron oxide was obtained.The results show that the estimate of hematite is consistent with the actual hematite concentration,while the content of goethite fails to be verified.The reasons might be:(1) In the sample,hematite and goethite are mutually matrix to each other.Hametite affects goethite more than goethite affects hematite.The matrix effect,which plays an important role in the regression equations,is noticeable in South China;(2) The CBD cannot remove goethite derived from the rock,which is coarser and more crystalized than the secondary one formed by soil.As a result,the concentration obtained by DRS is different from the actual concentration of goethite mixed;(3) Because of the hot,humid climate in South China,A1 substitution can take place easily in the soil.The crystal structure of goethite leads to more substituted Al than hematite,which means that the result might be wrong.To conclude,DRS can be applied to the hematite in South China,but one needs to be cautious when it comes to goethite.关键词
九江黄土/赤铁矿/针铁矿/漫反射光谱Key words
Jiujiang Loess/hematite/goethite/diffuse reflectance spectroscopy分类
天文与地球科学引用本文复制引用
苑晓康,李徐生,韩志勇,赵万苍,周玉文,吴双殊,郑延花,鹿化煜..基于漫反射光谱的铁氧化物定量分析在南方黄土中的适用性研究[J].高校地质学报,2017,23(2):350-358,9.基金项目
国家自然科学基金(41571188 （）
41671191 （）
41690111 （）
41673095) （）
