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Boninites: Petrochemistry, systematics, and petrogenesis
Abstract. The problems of geology and geochemistry of the Southern Pechenga structural zone have been presented in the paper. The certain composition inheritance is typical for the Southern Pechenga magmatism, that is manifested in the inheritance petrochemical signs in Kalevian basalts (Bragino Suite) as compared with the Northern Pechenga basalts. The received Sm-Nd isochron of the Southern Pechenga picrites (1894±40 Ma) dates the beginning of the Vepsian in the Southern Pechenga zone, and the Rb-Sr isochron (1260±73 Ma) – the age of the Middle Riphean thermal events in this area.
Keywords: boninite, systematic, non-equilibrium phases, quarts-normative matrix, olivine impregnation, fractional crystallisation, subvolcanic conditions, olivine separation
Printed reference: Dubrovsky M.I. Boninites: Petrochemistry, systematics, and petrogenesis // Vestnik of MSTU. 2009. V. 12, No 3. P. -.
Electronic reference: Dubrovsky M.I. Boninites: Petrochemistry, systematics, and petrogenesis // Vestnik of MSTU. 2009. V. 12, No 3. P. -. URL: http://vestnik.mstu.edu.ru/v12_3_n36/articles/08_dubrov.pdf.
