Ultramafic lamprophyre from the Wajrakarur kimberlite field of Southern India and its petrogenetic significance

Abstract

Wajrakarur kimberlite field (WKF) of southern India contains more than 45 intrusions of diamond host rocks. They have been identified as kimberlites, orangeites/ olivine lamproites and ultramafic lamprophyres during previous studies. All the so far reported kimberlites and related rocks show ~1100 Ma age except Timmasamudram kimberlite which gave ~90 Ma age (e.g.