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Petro-Mineralogy and Major Elements Geochemistry of Regolith profile of Calcrete deposits at Pandalgudi, Viruthunagar District, Tamilnadu, India

Author Affiliations

  • 1 Department of Geology, V.O. Chidambaram College Tuticorin-628008, Tamilnadu, INDIA

Int. Res. J. Earth Sci., Volume 3, Issue (9), Pages 1-7, September,25 (2015)


Calcrete is one of the essential impure limestone components of arid and semi-arid depositional system. It is widespread in the regolith part of Pandalgudi Village (Latitude N922’21.6’’ and Longitude E7816’23.3’’) Viruthunagar district of Tamilnadu. The Schematic stratigraphic succession of the profile of calcrete deposits is cited. The calcrete layers are in the form of gravel, nodular hardpan, lumpy and chalky states. The petrological observation reveals that micritic calcite precipitation developing = around detrital quartz, feldspar and other sap rock grains such as biotite hornblende, hypersthene which results as rimming, veining, void lining, lensoidal, meshwork, displacive and replacive structures. The study of major elementgeochemistry of calcrete indicates that CaO, MgO, SiO, Al and Fe are in elevated concentration (> 1%) whereas MnO, NaO, KO, TiO2 and P in low level concentration ( 1%). The major element geochemistry of calcreteillustrates the geochemical environment of the study area.


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