Geochemical Distribution of Platinum Metals, Gold and Silver in Intrusive Rocks of the Norilsk Region

The Norilsk ore district is one of the world leaders in production platinum metals. Long-term research focused on detection sulfide platinum-copper-nickel ores contributed to accumulation a large volume scientific material geology and mineralization area. Despite this, issue composition initial melt for ore-bearing intrusive complexes its degree enrichment with noble metals remains open. Intrusive rocks region are rarely analyzed their ratio However, analysis comparison geochemical parameters different types intrusions allows us draw important conclusions not only about magmas complexes, but also formation conditions intrusions. This study demonstrates distribution metals, gold silver main petrographic differentiates Kharaelakh, Talnakh, Vologochan Kruglogorsk-type intrusion. regularities variations depend host rocks. There two series inner structure intrusions: 1. Picritic taxitic gabbro-dolerites enriched PGE-Au-Ag which forms disseminated at intrusion bottoms (ore-bearing rocks). 2. Olivine-, olivine-bearing, olivine-free leucogabbro poor upper part (ore-free distinct correlation between PGE, Cu, S lesser extent Ni first rock group, characteristic PGE-Cu-Ni deposits. In second correlations revealed, coefficients lower. element controlling copper. Talnakh most by According metal patterns Kharaelakh show highest melting mantle during parental chambers. some differences, features studied indicate similar characteristics gold, Kruglogorsk Zubovsk types, allow suggesting close these