The Magnetic Mechanism of S5 Paleosol in Baoji Section
详细信息
- 责任者：Guo Xuelian (College of Geological Sciences and Mineral Resources ; Lanzhou University ; Lanzhou 730000 ; China) ; Liu Xiuming
- 刊名：Quaternary Sciences
- 出版年：2012
- 卷期：32(4)
- 关键词：古土壤 ; paleosols ; 磁化率 ; magnetic susceptibility ; 陕西 ; Shaanxi Province
- 页码：p.785-794
- 图表：5 illus., 54 refs.
- 分类号：1400
- issnNo：ISSN1001-7410
- isbnNo：CN11-2708/P
摘要
In order to find out its mechanism,the samples were collected from the Baoji loess-paleosol sequence since S5,with sampling interval 30 cm.The results of rock magnetism and geochemical measurements for Baoji S5 and S3samples show,that ratio Rb/Sr of S5 samples was higher than that of S3,indicating that S5 was a better-developed paleosol unit,stronger chemical weathering than S3.Such transformation of magnetic minerals,from high MS minerals(magnetite and maghemite)to low MS minerals(such as goethite)due to over moisture(gleying),results in the lower MS value for Baoji S5 paleosol.