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The dissolution mechanism and karst development of carbonate rocks in karst rocky desertification area of Zhenfeng–Guanling–Huajiang County, Guizhou, China

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Abstract

The phenomenon of rocky desertification is obvious in karst plateau of Guizhou, China, and the distribution area of slight–medium–severe rocky desertification is very large in Zhenfeng–Guanling–Huajiang, Guizhou. To explore the cause of formation and development of rocky desertification in the region, the karst development mechanism and characteristics were studied by the method of indoor dissolution test and microscopic analysis. The results show that the dissolution and karst features of carbonate rocks are closely related to geological structure, hydrogeological conditions, and lithology. The dissolution rate is the most affected by the chemical composition and mineral composition, followed by the pore structure and the particle feature. The dissolution rate of carbonate is in positive proportion with the calcite content, while it decreases with increasing content of dolomite. In the same chemical composition, the rock with the finer grains has a faster surface dissolution rate. In addition, the erosion amount will change with the pore aperture and connectivity. Karst morphology is mainly affected by the microstructure and mineral assemblage characteristics of carbonate rocks. In this rocky desertification area, bare rock over a large area will be further eroded, which will form the stone bud, stone forest. At the same time, the hydrodynamic effect of groundwater will erode the rock deeply, and the depression, karst funnel, or deep valley will appear gradually.

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Acknowledgements

This work was supported by research of the National Key Research and Development Program of China (2016YFC0502603) and Grant 41302220 from the National Natural Science Foundation of China, and research project of the Eighth Phase of The Excellent Experiment Items of Tongji University, China Scholarship Council, and US Department of Agriculture-National Institute of Food and Agriculture Hatch Project (TEX0-1-9448) via Texas AgriLife Research.

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Authors and Affiliations

  1. Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai, 200092, China

    You’en Bai, Qi Liu, Zhanfei Gu & Yaoru Lu

  2. Key Laboratory of Geotechnical and Underground Engineering, Ministry of Education, Tongji University, Shanghai, 200092, China

    You’en Bai, Qi Liu, Zhanfei Gu & Yaoru Lu

  3. Texas A&M AgriLife Research Center at El Paso, El Paso, TX, 79927, USA

    Qi Liu & Zhuping Sheng

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  1. You’en Bai
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  2. Qi Liu
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  3. Zhanfei Gu
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  4. Yaoru Lu
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  5. Zhuping Sheng
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Correspondence to Qi Liu.

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Bai, Y., Liu, Q., Gu, Z. et al. The dissolution mechanism and karst development of carbonate rocks in karst rocky desertification area of Zhenfeng–Guanling–Huajiang County, Guizhou, China. Carbonates Evaporites 34, 45–51 (2019). https://doi.org/10.1007/s13146-017-0386-x

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  • DOI: https://doi.org/10.1007/s13146-017-0386-x

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