Magnetic Susceptibility of Holocene Loess‐Black Loam Sequence from Jiaodao Profile of China Before and after Citrate‐Bicarbonate‐Dithionite Extraction
Magnetic Susceptibility of Holocene Loess‐Black Loam Sequence from Jiaodao Profile of China Before and after Citrate‐Bicarbonate‐Dithionite Extraction
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DOI：
10.1002/cjg2.67
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发表时间：
2000-07
期刊：
影响因子：
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通讯作者：
C. Deng;B. Yuan;R. Zhu;K. Verosub;M. Singer;Natasa J. Vidic
中科院分区：
文献类型：
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作者：
C. Deng;B. Yuan;R. Zhu;K. Verosub;M. Singer;Natasa J. Vidic
来自山西省焦岛。CBD能有效去除磁赤铁矿和细粒磁铁矿等成壤磁性颗粒，CBD处理过程中，成岩磁性颗粒（多畴磁铁矿为主）基本保持完整。研究结果表明，CBD技术可用于判别土壤敏感性的成土作用，TDS技术可作为分析中国黄土和古土壤敏感性增强和成土作用的有效方法。综上所述，CBD技术为中国黄土和古土壤易感性增强和风成成因的成土模式提供了强有力的支持。特别是CBD和TDS方法的联合研究表明，由于成土作用产生的磁赤铁矿颗粒对黄土和古土壤敏感性的增强有重要贡献。
quence from Jiaodao, Shanxi province. The pedogenic magnetic grains, including maghemite and fine-grained magnetite, can be effectively removed by CBD, and the lithogenic magnetic grains (mainly mutidomain magnetite) are nearly intact during CBD treatment. Our results suggest that the CBD technique is useful in distinguishing pedogenic contributions to the susceptibilities and that TDS can be used as a useful method for the analysis of susceptibility enhancement and pedogenesis in Chinese loess and paleosols. Thus, it could be concluded that the CBD technique provides a strong support for the pedogenic model of susceptibility enhancement and eolian origin of Chinese loess and paleosols. Especially, the combination study using CBD and TDS methods suggests that the maghemite grains produced due to pedogenesis make significant contributions to the enhanced susceptibility of loess and paleosols.