期刊论文

Geochemical characteristics and the comparison of major elements in red earth profiles and loess profiles

中文

干旱区资源与环境

1003-7578

2018

32

4

160-164

10.13448/j.cnki.jalre.2018.124

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

本校为第一机构

对比分析了4个红土剖面、3个黄土剖面常量元素地球化学特征,结果表明:⑴常量元素组分皆以SiO_2、Al_2O_3和Fe_2O_3为主,三者平均总量红土高于黄土。黄土易溶组分中Na_2O、MgO和CaO的平均含量明显高于红土,难溶组分中Fe_2O_3、Al_2O_3的含量低于红土。⑵常量元素线性回归表明,黄土、红土Al_2O_3与Fe_2O_3表现为明显的正相关,SiO_2分别与Al_2O_3、Fe_2O_3表现为明显的负相关,红土常量元素之间的相关性弱于黄土。 ⑶ UCC标准化显示,红土、黄土Si元素分布在1.00附近,亏损或富集不明显。投影点在风化趋势线上的分布表明,黄土处于化学风化过程的早期阶段,红土已经进入化学风化过程的中晚期阶段。⑷常量...

The geochemical characteristics of major elements of 4 red clay profils and 3 loess profils were analyzed and compared. Results are shown as follows：（1）The major elements are dominated by SiO2 ,Al2O3 and Fe2O3. The total average content of red earth of them is higher than that of Loess ,The soluble components contents of Na2O, MgO and CaO in loess are obviously higher than that in red earth. The average insoluble components contents of Fe2O3 and Al2O3 are lower than that in red earth. （2）Linear regression of the major elements showed that ...