Petrography, Geochemistry and Petrogenesis of Alkali Lamprophyres of Jungel Suite, Central India

A systematic petrographic and geochemical study of three, previously unreported carnptonite dykes from Bijawar of Son valley is presented with a brief discussion on their petrogenesis. These larnprophyres show transition from alkali basalt and owe their origin through fractionation combined with local enrichment of volatiles, largely derived from mantle instead either by hybridization or assimiIation of basic magma with granite/late stage granitic fluids or mixing with an andesitic magrna as proposed by some earlier workers.