西北干旱区黄土-古土壤磁化率变化特征

详细信息

收稿日期: 2007-11-09

修回日期: 2007-12-30

MAGNETIC SUSCEPTIBILITY VARIATION IN SEMI-ARID REGION OF NORTHWESTERN CHINA

Received Date: 09 November 2007

Revised Date: 30 December 2007

摘要: 对祁连山东段黄土-古土壤环境磁学的研究表明,在这一地区黄土-古土壤沉积中主要的磁性矿物是磁铁矿型矿物,而磁化率的增强与黄土-古土壤序列并不匹配,且存在着由剖面底部向上逐渐升高的趋势。我们认为在铁磁性矿物种类没有变化的情况下,西北干旱-半干旱区磁化率的这种增强很可能是磁性颗粒物粒度变化或者来源相关的磁性颗粒含量的变化所引起。
- 磁化率 /
- 环境磁学 /
- 西北干旱区
Abstract: Our recent study in northwestern China indicates that the variation of magnetic susceptibility does not coincide with the role in the Chinese I.oess Plateau. The environment magnetism investigation in the northeastern margin of the Qilian Mrs shows that there is no obvious difference in ferri-magnetic minerals between Chinese Loess Plateau and semi-arid region of northwestern China. Here we suggest the grain size of magnetic particles may be the potential contributor to the variation difference.
- magnetic susceptibility /
- environment magnetism /
- semi-arid region of northwestern China