Ni-PGE mineralisation within the Namibian Kunene anorthosite complez, evidence for a continental scale Kibaran Ni-PGE mineralizing event
1 IntroductionThe discovery of Ni-sulphide mineralisation at Voiseys Bay initiated world-wide exploration for similar mineralisation associated with anorthosite complexes intruded into continental suture zones. Typically, Ni-sulphide mineralisation in this setting is characterised by very low PGE contents, therefore these intrusions have not been targeted by PGE explorers. In Africa, the Kibaran orogenic belt is a continental suture zone that is best known and documented in Tanzania and Burundi. The age of this orogeny is approximately 1.3Ga, and rocks of this age have been documented throughout the supposed extent of this belt from Tanzania through to Namibia. Mafic to ultramafic intrusions associated with this terrane host economically important, but as yet unexploited Ni-sulphide and laterite orebodies. Metallogenically, the sulphide-hosted mineralised zones comprise a distinct, Ni-PGE class of deposit with Pt equal to Pd. The Kunene Anorthosite Complex is the largest such intrusion in the World, located in northern Namibia and southern Angola, and is believed to be of Kibaran age. Exploration work carried out by African Nickel has identified mafic to ultramafic feeder sills that host disseminated Ni-PGE sulphide mineralisation. The metallogenic characteristics of the mineralisation are equivalent to the East African Kibaran intrusions.
Richard Hornsey Michail Naumov Heinz Fraenkel
African Nickel Limited SA Representative Office, PO Box 98924, Sloane Park 2052, South Africa NamSlavic Exploration Pty.Ltd., P.O.Box 6741, Windhoek, Namibia Karpinsky Geological Research Instit
国际会议
Xian International Ni-Cu(Pt) Deposit Symposium 2009(2009 西安·Ni-Cu(Pt)岩浆矿床国际学术研讨会)
西安
英文
143-146
2009-09-01（万方平台首次上网日期，不代表论文的发表时间）