Radioactivity levels in the atomic mineral occurrences along Dharmapuri Shear zone in parts of Vellore, Krishnagiri, Dharmapuri and Salem districts of Tamil Nadu, India.

The aim of this study was to evaluate the concentrations of naturally occurring radioactive nuclides Ra, Th and K and corresponding dose rates over atomic mineral occurrences of Dharmapuri shear zone in parts of Salem, Dharmapuri, Krishnagiri, and Vellore districts of Tamilnadu, India. In this paper, area-wise ternary diagrams of Ra, Th and K were plotted to study their relative concentration in the samples. Correlation study was also carried out to delineate the contribution of individual radionuclides toward the measured gamma dose rate.