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Quantitative determination of the effect of temperature on mudstone decay during wet-dry cycles: A case study of 'purple mudstone' from south-western China

文献类型： 外文期刊

作者： Zhang, Dan 1 ; Chen, Anqiang 5 ; Wang, Xuemei 1 ; Liu, Gangcai 1 ;

作者机构： 1.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Peoples R China

2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China

3.Minist Water Resources, Chengdu 610041, Peoples R China

4.Yunnan Agr Univ, Coll Resources & Environm, Kunming 650205, Peoples R China

5.Yunnan Acad Agr Sci, Inst Agr Environm & Resources, Kunming 650205, Peoples R China

关键词： Rock decay;Mudstone;Temperature alternation;Wetting-drying

期刊名称：GEOMORPHOLOGY （ 影响因子：4.139； 五年影响因子：4.623 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Although temperature is considered a key factor influencing rock decay, little is known about the quantitative relationship between a rock's decay rate and temperature, which makes it difficult to quantitatively predict the rate of rock decay under varied temperature during wetting-drying cycle conditions. Thus, the aim of the present paper was to observe the decay rate of various purple mudstones and to develop a model with which to calculate their decay rates under varied temperature conditions. Three types of purple mudstone were sampled from the Tuodian group (J(3)t), Matoushan group (K(2)m) and Lufeng group (J(1)l), located in the Chuxiong district of Yunnan province, south-western China. All samples were manually cut into cubes of 50 x 50 x 50 mm, before being subjected to 39 wetting-drying cycles in a 2 mm sieve under artificial constant temperature, natural daily temperature variation and artificial temperature alternation (minimum and maximum) treatments in the laboratory. Decay rates were calculated by weighing the mass remaining in the sieve after each treatment cycle. The results showed that the decay rates of the tested rocks rose with an increase in temperature and temperature difference (maximum-minimum), with the rank order of decay rate being J(3)t > K(2)m > J(1)l. Quantitative analysis revealed rock decay rate to be significantly related to temperature by a power function, and exponentially related to temperature difference. Our results suggested that temperature difference has a stronger effect on purple mudstone decay than that of temperature magnitude during the wetting-drying processes. (C) 2015 Elsevier B.V. All rights reserved.

  • 相关文献

[1]A quantitative determination of the effect of moisture on purple mudstone decay in Southwestern China. Zhang, Dan,Wang, Xuemei,Yan, Bangguo,Liu, Gangcai,Zhang, Dan,Wang, Xuemei,Yan, Bangguo,Liu, Gangcai,Zhang, Dan,Chen, Anqiang,Yan, Bangguo,Shi, Liangtao,Liu, Gangcai.

[2]Effect of moisture and temperature conditions on the decay rate of a purple mudstone in southwestern China. Zhang, Dan,Chen, Anqiang,Xiong, Donghong,Liu, Gangcai.

[3]Quantitative model prediction of the combined effect of moisture content and temperature on purple mudstone decay in south-western China. Zhang, Dan,Chen, Anqiang,Zhang, Dan,Chen, Anqiang,Zhao, Jixia,Lu, Chuanhao,Liu, Gangcai,Zhang, Dan,Chen, Anqiang,Zhao, Jixia,Lu, Chuanhao,Liu, Gangcai.

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