Mineralogy and geochemistry of lateritic soil profiles in Kerala, India |
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| Authors: | BC Raymahashay KS Rao VK Mehta PR Bhavana |
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| Institution: | Department of Civil Engineering, Indian Institute of Technology, Kanpur 208 016, India |
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| Abstract: | Lateritic soils near Calicut, Kerala, contain halloysite of intermediate hydration, kaolinite, goethite, gibbsite and quartz. The presence of halloysite is responsible for relatively high plasticity and cation-exchange capacity. Fe-hydroxide colloids along with halloysite contribute to significant phosphate uptake by this soil. Composition of local groundwater is consistent with weathering of sodic plagioclase to gibbsite, kaolinite and metastable halloysite. |
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