Estimation of K, U and Th in precambrian ores by low-level γ-ray spectroscopy

Gamma-ray spectroscopy technique has been employed to estimate the concentration of three large ion lithophile elements, namely K, U and Th present in banded iron-formations, ferromanganese oxides and chromites collected from different mines of eastern Indian geological belt. The results obtained by this method have been discussed on the basis of ancient ocean condition, effect of weathering and on selectivity of large ion lithophile elements towards major elemental phase, i.e., silica, iron, chromium and manganese. (author)