• 责任者：Zhao Jingbo (College of Tourism and Environment Sciences ; Shaanxi Normal University ; Xi’an710062 ; China) ; Xing Shan
• 刊名：Quaternary Sciences
• 出版年：2011
• 卷期：31(3)
• 关键词：古土壤 ; paleosols ; 陕西 ; Shaanxi Province
• 页码：p.514-521
• 图表：6 illus., 1 table, 27 refs.
• 分类号：1400
• issnNo：ISSN1001-7410
• isbnNo：CN11-2708/P

Yangjiawan section (34°03’41″N, 109°32’51″E), 50 km to the east of Xi’an, lies in the south central area of Guanzhong Plain. Forty-one samples were collected from the section of S₁ paleosol at a interval of 5 cm. The major oxides and trace elements are analyzed by X-ray fluorescence analysis. The migration depth of Fe₂O₃ and CaCO₃, the layer and thickness of weathering and leaching loess has been observed in the field. It is observed that the deep weathering and leaching loess has developed under the S₁ paleosol, more than 2 m than nowadays. The apparent migration of red ferruginous clay film indicates that the soil has undergone acidic weathering stage. The distributive characteristics of Fe₂O₃, CaCO₃ and the development of deep weathering and leaching loess indicate that the S₁ paleosol was subtropical yellow brown forest soil, belonging to acidic alfisol.