LATERITE AS A POTENTIAL SEEPAGE BARRIER FROM A KARST-DEPRESSION TAILINGS IMPOUNDMENT

In the absence of the necessary valley topography, karst depressions are sometimes used to construct conventional impoundments in order to contain tailings. Leakage is a primary concern for such impoundments. The purpose of the current study was to determine the characteristics and barrier performan...

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Bibliographic Details
Published in:Clays and clay minerals 2021-02, Vol.69 (1), p.1-22
Main Authors: Gao, Hai-Yan, Xu, Ze-Min, Ren, Zhe, Wang, Kun, Yang, Kui, Tang, Yong-Jun, Luo, Jun-Yao
Format: Article
Language:English
Subjects:
Bayer process
Biogeosciences
Chemical analysis
Chlorite
Clay
Clay minerals
Concretions
Earth and Environmental Science
Earth Sciences
Electron microscopy
Geochemistry
Geologic depressions
Geology
Gibbsite
Goethite
Grain size
Hydrogeology
Hydroxides
Impoundments
Iron
Karst
Laterites
Linings
Liquid limits
Medicinal Chemistry
Mine tailings
Mineral composition
Mineralogy
Nanoscale Science and Technology
Permeability
Plasticity index
Scanning electron microscopy
Sedimentary structures
Seepage
Soil Science & Conservation
Tailings
X-ray diffraction
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Summary:In the absence of the necessary valley topography, karst depressions are sometimes used to construct conventional impoundments in order to contain tailings. Leakage is a primary concern for such impoundments. The purpose of the current study was to determine the characteristics and barrier performance of laterite mantling karst depressions, using, as an example, the Wujiwatang (WJWT) tailings impoundment, located in the Gejiu mining area, southwestern China. The geotechnical-hydrogeological properties, geochemistry, mineral compositions, and particle shapes of the laterite were investigated by geotechnical techniques, chemical analysis, X-ray diffraction (XRD), and scanning electron microscopy (SEM). The results showed that the laterite contained poorly sorted particles that covered a wide spectrum of grain sizes (
ISSN:0009-8604
1552-8367
DOI:10.1007/s42860-020-00103-8