High-Nb rutile from upper mantle eclogite xenoliths of the diamond-bearing kimberlite pipe Catoca (Angola)

Abstract

The Luanda diamond province (northeastern Angola), including the Catoca kimberlite pipe, which is ranked fourth in the world diamond reserves, is located at the intersection of deep fault zones, called the Lucapa corridor, extending from southwest to northeast for more than 1200 km with the width vary� ing from 50 to 90 km, with the structures of the Archean Kasai Craton [1]. The thickness of the cra� tonal mantle in this region is considered to be the