Mafic-ultramafic magmatism of the Norilsk region and a problem of sources of ore matter
The metallogenic character of the Norilsk region (Siberia) is determined by a regular zonal distribution of mafic-ultramafic intrusions which comprise three contrasting groups distinguished by specific compositional and structural features (Distler et al., 1988)1 Mesocratic completely-differentiated ore-bearing intrusions (Norilsk I, Talnakh, Kharaelakh, Chernogorsky and Mikchandinsky massifs) are characterised by(1) Well-developed petrochemical, geochemical and mineralogical differentiation of sulphide-silicate matter over a vertical sequence, since gabbroic rocks occur in the upper and lower parts of the bodies and olivine has settled to form horizon of ultramafic rocks within the layered series. There is a continuous upward increase in SiO2, CaO, Al2O3, TiO2, Na2O and K2O contents of whole rocks and a decrease in MgO and Cr2O3 contents starting from the picritic layer.
V.V.Distler S.F.Sluzhenikin K.N.Malitch O.V.Petrov B.G.Pokrovsky
IGEM EAS, Moscow VSEGEI, Sankt-Peterburg GIN RAS
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
149-151
2009-09-01（万方平台首次上网日期，不代表论文的发表时间）