Weathering of pisha-sandstones in the wind-water erosion crisscross region on the Loess Plateau |
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Authors: | Hanbin Ni Liping Zhang Dengrong Zhang Xiyuan Wu Xingtao Fu |
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Institution: | [1]Institute of Soil and Water Resource and Environment Sciences, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310029, China [2]Key Laboratory of Polluted Environment Remediation and Ecological Health, Ministry of Education, Zhejiang University, Hangzhou, 310029, China [3]Zhejiang Provicial Key Laboratory of Subtropic Soil and Plant Nutrition, Hangzhou, 310029, China [4]State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Water and Soil Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi, 712100, China [5]Department of Earth Sciences, Zhejiang University, Hangzhou, 310027, China |
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Abstract: | Two types of pisha-sandstones of purple sandstones and gray sandstones, widely distributing in the wind-water erosion crisscross region of China, were selected and used in laboratory experiments for a better understanding of the drying-wetting-freezing weathering process resulting from the apportionment of water or salt solution to rock samples. Weathering experiments were carried out under the conditions of environment control (including temperature, moisture and salt solution). All rock samples were frequently subjected to 140 drying-wetting-freezing cycles. The influences of weathering process were evaluated. It was found that the different treatments of moisture and salt solution applications could affect the nature of the weathering products resulting from drying-wetting-freezing. It was also observed that salt solution could effectively alleviate the weathering of pisha-sandstones. Although not all the observations could be explained, it was apparent that simulated environmental factors had both direct and indirect effects on the weathering of rocks. |
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Keywords: | Drying-wetting-freezing simulation pisha-sandstone weathering wind-water erosion crisscross region soil erosion China |
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