Gold and platinum group metal mineralisation in the Skaergaard intrusion, southern East Greenland

Abstract

A stratabound gold and platinum metal mineralisation has been located in the Tertiary Skaergaard intrusion of the Kangerdlugssuaq area 68°N in East Greenland. The mineralisation is located in the upper part of the Middle Zone (MZ) of the layered gabbros and appears continuous over c. 40 km². The mineralisation is 2–5 m thick with gold concentrations up to 5.6 g/t, Pd up to 3.5 g/t and Pt up to 1.5 g/t. Major and trace element distributions indicate that the gold is concentrated in the less mafic layers in the mineralised horizon. It is also concluded that previously reported TiO₂ contents of the gabbros and the TiO₂ enrichment in the evolving liquids of the intrusion have been underestimated by a factor of 2–3.