Association of Authigenic Apatite with Uraniferous Organic Matter at Domiasiat, Meghalaya and its Genetic Implications

The occurrence of authigenic apatite with uraninite, pyrite, sphalerite and galena within organic matter is a characteristic feature of the sandstone-type uranium deposit at Domiasiat, Meghalaya. Apatite occurs in the form of thin hexagonal basal plates and its identification is confirmed by x-ray diffraction. The authigenic apatite in this specific association points towards diagenesis in euxenic conditions of marine affinity.