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Effect of temperature on mudstone disintegration process revealed with image analysis

Journal of Mountain Science 2022年第7期19卷 2126-2135页

作者： YAN Luo-bin srdjan petrovic HUANG Cheng XIE Chun-xia ZONG Hui-ming Milica KASANIN-GRUBIN School of Geographical Sciences Southwest UniversityChongqing400715China Danxia Landscape Research Institute Shaoguan512330China Institute of Chemistry Technology and MetallurgyDepartment of Catalysis and Chemical Engineering and Center for Environmental Chemistry and EngineeringUniversity of BelgradeBelgrade11000Serbia School of Geographical and Planning Sun Yat-sen UniversityGuangzhou410275China

Quantifying rock weathering processes,especially in ways of nondisturbance and on-site investigation,is one of the most critical tasks in predicting rocks erosion rates and understanding the sediment *** proposed a more reproducible approach to test how image analysis can quantify the changes in the size and shape of fragments during the weathering *** artificial models were designed to select suitable metrics among over 20 *** validate the efficiency of image analysis,we analyzed rocks from badlands in Nanxiong Basin,Southeast China,under three different ranges of temperature differences(TD)during cyclic wetting and drying(WD).Our results show that TDs can accelerate the disintegration rate,and even if there is only a 20℃ difference in the range of TDs,an apparent difference in fragment size was ***,the shape of fragments became more round as the increasing number of cyclic treatments,and for samples that went through the same number of treatments,the larger the temperature difference,the more round the shape *** that serves as another evidence for landscape evolution response to climatic warming.

关键词： Mechanical weathering Temperature effect Quantifying weathering rates Fragment size Fragment shape

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