Spatial and Temporal Variations in the Geochemistry of Cauvery River (Tamil Nadu, India) Sediments and its Implication to Weathering
DOI:
https://doi.org/10.51710/jias.v37i2.107Abstract
South-West (SW), North-East (NE) and Post-monsoon Cauvery River sediment geochemistry characterizes the intensity of chemical weathering ascribing to the relative mobility of elements during weathering. The negative correlation between Al2O3% and SiO2% signifies that the sediments are enriched with quartz and, Al2O3% vs. TiO2% relationship deduces the granite and granodiorite are the major source rocks of Cauvery River sediment. The weathering trend of Cauvery River sediments is accounted by the incidence of illite clay minerals. The weathering intensity of SW monsoon sediments (57.73%), NE monsoon sediments (64.17%) and post-monsoon sediments (64.79%) specifies the weak to intermediate intensity of weathering, which is controlled by precipitation. The higher concentration of Ba (459.45-856.95ppm) symbolises the presence of K-feldspar.
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