Precambrian rocks of northeast India

Abstract

In the northeast India, Precambrian rocks are exposed in Arunachal Pradesh, Assam and Meghalaya. Precambrian geology is highly complicated and cannot be resolved by reconnaissance-type studies and correlation is based mainly on lithologic similarities. Detailed field and laboratory studies are essential for the understanding of Precambrian chronology and such studies must include careful evaluation of petrogenetic processes of sedimentation, diagenesis, metamorphism and graniteformation. Most of the studies in northeast India Precambrian rocks, are based on reconnaissance-type studies. Petrologicalgeochemical and geochronological studies have been carried out to correlate with global supercontinent.