Changing Color of Chinese Loess: Controlling Factors and Paleocliamtic Significanceshemas-microsoft-com:office:office" />
详细信息
- 责任者：He Liu (State Key Laboratory of Loess and Quaternary Geology ; Institute of Earth Environment ; Chinese Academy of Sciences ; Xi’an 710075 ; China) ; Sun Youbin
- 刊名：Geochimica
- 出版年：2010
- 卷期：39(5)
- 关键词：黄土 ; loess ; 古气候 ; paleoclimate ; 中国 ; China
- 页码：p.447-455
- 图表：6 illus., 1 table, 36 refs.
- 分类号：1400
- issnNo：ISSN0379-1726
- isbnNo：CN44-1398/P
摘要
Two loess-paleosol sequences at the Weinan and Xifeng sections spanning the last climatic cycle were investigated to better understand the spatial and temporal variations of the soil color(e.g.,lightness and redness) and their major controlling factors.The results show that lightness and redness are significantly different between loess and paleosols layers,with relatively low lightness values and high redness values in the paleosol layers.Variations in the lightness are strongly linked to the concentrations of iron oxides,organic matter and calcium carbonate.Relative impacts of these factors on the lightness decrease gradually from iron oxides and organic matter to calcium carbonate.
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