| 古气候与环境演变 |
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| Significance of Micro-morphological Features of the Holocene Loess-paleosol Profile in Loess Plateau |
| ZHANG Yan-qing, PANG Jiang-li, HUANG Chun-chang, ZHA Xiao-chun |
| College of Tourism and Environmental Sciences, Shaanxi Normal University, Xian 710062, China |
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Abstract The micro-morphological characteristics of a Holocene loess-paleosol sequence in Changchengyuan (CCY) of Ningxia were observed in detail with a polarizing microscope. The shape parameters of coarse particles in the paleosol, S0 (e.g., C/F(10 μm), area, perimeter, diameter and so on) and the micro-morphological indices (for example, pedogenetic features, porous, and micro-fabric) are obviously different from loess layer, L. In S0,C/F(10 μm) is the minimum in the entire profile, porosity is the maximum, and the degree of residual clay dipped by iron is the most intense. These features indicate the paleosol S0 suffers the most intense weathering, and the intensity of pedogenesis is significant. The micro-morphological changes in profile are well parallel to that of magnetic susceptibility, CaCO3, and granularity, so the C/F(10 μm) value, the porosity, the pedogenetic features may be used as key proxies indicating climatic change.
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Received: 09 October 2009
Published: 20 November 2010
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2010, Vol. 30 
