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MAGNETIC FABRIC CHARACTERISTICS OF HYDRAULIC DEPOSIT,EOLIAN DEPOSIT AND PALEOSOL
Author(s): ZHANG Jiaqiang, LI Congxian, CONG Youzi
Pages: 85-
94
Year: 1999
Issue:
2
Journal: MARINE GEOLOGY & QUATERNARY GEOLOGY
Keyword: 水成沉积; 风成沉积; 古土壤; 磁组构; 沉积环境;
Abstract: 晚第四纪水成沉积、风成沉积、古土壤等的磁组构研究表明,不同成因的沉积物具有明显不同的磁组构特征.一般地,水成沉积的体积磁化率K受物源和水动力因素控制,P和F均>1.02,q<0.5;风成沉积的K受物源控制,内陆黄土的K明显高于沿海黄土及海岸风沙K,P和F均<1.02,q的平均值>0.55;古土壤的K受母质沉积类型和成土环境的氧化还原条件控制,内陆古土壤的K偏高,沿海古土壤的K偏低,内陆古土壤的K远高于沿海古土壤的K,P和F均<1.02,q的平均值在0.5左右.运用典型沉积的磁组构特征对比分析未知沉积物,可以得到未知沉积物的物源、沉积过程和环境信息.
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