X-ray diffraction studies of carbonate rocks around western part of palnad sub basin, Guntur district, Andhra Pradesh

The diffractogram analysis of the Kurnool carbonates showed 3.34A^o, 3.04A^o and 2.84A^o strongest lines representing calcite mineral, 4.24A^o, 3.35A^o, and 2.45A^o strongest lines representing quartz mineral and 3.60A^o strongest line representing mineral dolomite. The calcite peaks were strong and prominent and well resolved, some of them showed secondary peaks indicating that they are magnesian calcite with stoichiometric proportions of magnesium and calcium. The peaks represented by the mineral dolomite is very mild and small. Thus the X-ray diffractogram analysis revealed that the carbonate rocks of Kurnool Group contain calcite, dolomite and quartz as dominant mineral composition.