土壤2017，Vol.49Issue(5)：1032-1037,6.DOI:10.13758/j.cnki.tr.2017.05.026
澧阳平原杉龙岗遗址埋藏古水稻土磁性矿物特性
Magnetic Mineral Characteristics of Buried Ancient Paddy Soil in Shanlonggang Site of Liyang Plain
摘要
Abstract
Environmental magnetism method was applied in this study to discuss the content, composition and granularity of the magnetic minerals of the buried ancient paddy soil in Shanlonggang Site in Liyang Plain in order to disclose the characteristics of magnetic minerals. The results showed that the average MS, SIRM, 'soft' IRM, S300 ratios were 6.2×10-8m3/kg, 16338.3×10-5 Am2/kg, 773.35×10-5Am2/kg and 71.99%, respectively. It also showed that the frequency dependent susceptibilityχlf was over 10%. Furthermore, the magnetic susceptibility was mainly derived from ferrimagnetic mineral and the imperfect antiferromagnetic mineral, especially from ferrimagnetic mineral. Meanwhile, the contents of ferrimagnetic and the imperfect antiferromagnetic minerals decreased with the depth, and were lower than those of current paddy soils. Finally, the results of SIRM/χlfand magnetic susceptibility, which could be used as an indicator of the magnetic grain size, indicated that the sizes of magnetic particles of the buried ancient paddy soil may be larger than those of current paddy soils.关键词
澧阳平原/古水稻土/磁性矿物/磁性参数Key words
Liyang Plain/Ancient paddy soil/Magnetic parameters/Magnetic mineral分类
农业科技引用本文复制引用
谭洁,周卫军,陈恋,刘沛,曹胜,罗思颖..澧阳平原杉龙岗遗址埋藏古水稻土磁性矿物特性[J].土壤,2017,49(5):1032-1037,6.基金项目
国家自然科学基金项目(41371288)资助. （41371288）
