N.I. GUSEV, A.V. ANTONOV (VSEGEI)

Kimberlites of the Serbeyan Prospect (Anabar Shield): melt products enriched with sodium, chlorine, carbonate

Results of a microprobe analysis of mineral compositions of the Serbeyan kimberlite: olivine, pyrope, phlogopite, sodalite, pyroxenes, spinelids, etc. The magmatic source of the Serbeyan kimberlites was formed as a result of melting of metasomatized garnet lerzolite under the influence of alkaline chloride fluids. Based on the evolution of the phlogopite composition, it can be assumed that the initial magma could have a lamprophyric (lamproite?) сomposition, the evolution of which took place according to the orangeite trend.
Keywords: kimberlite, the Anabar Shield, Serbeyan, pyrope, phlogopite, sodalite.