Abstract

The distribution of Th and other radioactive elements in bauxite-bearing deposits was examined in detail, and the deposits were classified into three groups on the basis of the Th content. Tabulated data show the U content in ppm, Ra in ppm equivalent U, Th in ppm, K, and Th/K ratio. The significant detail revealed is that during bauxite formation potassium was extensively depleted, Th accumulated, and U remained unchanged, resulting in a Th/K ratio tens and hundreds of times greater in the bauxite than in the country rock. (JSR)

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