The Raniganj Coal Basin: an example of an Indian
2002-3-1 · Dolerite dykes and lamprophyre dykes and sills occur extensively in the Raniganj Coal Basin Fig. 2, Fig. 6.The latter are dated at 105–113 Ma (K–Ar, whole-rock and mineral dating; Sarkar et al., 1980).Swarms of mica lampropyre ultramafic dykes and sills along with dolerite dykes are found as intrusives in all the Gondwana formations in the Raniganj Basin, except in
