期刊论文

Chemical weathering intensity and material source of red earth of Gaoxing profile in Hengyang city

中文

干旱区资源与环境

1003-7578

2017

31

7

74-78

10.13448/j.cnki.jalre.2017.215

国家自然科学基金项目（41471153） 湖南省自然科学基金项目（2016JJ6015）资助

本校为第一机构

为研究衡阳市红土风化强度和原始物质来源,对高兴剖面86件样品进行了元素测试和分析。结果表明: 1)地球化学参数CIA、BA值指示,风化强度由底部往上呈现减弱趋势,高兴剖面上段(72cm以上)为中等风化强度,下段(72cm以下)为强烈化学风化程度。2)元素UCC标准化曲线显示,元素Na、Ca、Mg、K和Sr表现出不同程度的亏损,AI和Fe为轻度富集,暗示了红土剖面曾经遭受了Na、Ca、Mg、K化学风化。3) A - CN - K风化趋势图指示,不同土层在物质组成上具有高度均一性,剖面风化过程发展到K元素迁移阶段,风化作用以伊利石和钾长石风化为特征; 4)常量元素比值显示,高兴剖面红土与衡山花岗岩风化壳元素比值曲线相近似,微...

Elemental compositions of 86 samples from Gaoxing profile were analyzed to study the chemical weath- ering intensity and material source of red earth in Hengyang city. The geochemical parameters （ CIA and BA） characteristics indicated that the chemical weathering intensity become weaken from the bottom to the top. The upper parts of Gaoxing profile （above 72cm） belong to medium weathering intensity, while the lower parts of profile （below 72cm） belong to intense chemical weathering degree. The UCC - normalized elements curves showed that ...