Abstract
Summary Selected samples of well and spring waters from the weathered profiles of a typical Deccan Basalt outcrop reveal strong controls of soil mineralogy. Calcium plagioclase, augite and volcanic glass in the bed rock weather to montmorilloniterich black soils in the foothills. Soils at higher slopes are lateritic. Lime concretions are common and quartz is ubiquitous. The HCO 3 /SiO 2 mole ratio in the waters is in the range predicted for alteration of plagioclase to montmorillonite and augite to kaolinite. The silica level is above quartz solubility and generally below solubility of amorphous silica. Montmorillonite and calcite are thermodynamically stable in the ground water environment. Geochemical mobility of elements during weathering decreases in the order Na, Mg, Ca, K, Si and Fe.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
