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Vol. 12 (2009 year), No. 3

Dubrovsky M.I.
Boninites: Petrochemistry, systematics, and petrogenesis

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.

(in Russian, стр.11, fig. 9, tables. 4, ref 19, Adobe PDF, Adobe PDF 0 Kb)

Vol. 15 (2012 year), No. 2

Dubrovsky M.I.
Melt systems as the basis of paragenetic analysis of mineral assemblages in igneous rocks

The paper considers the simplified PH2O-T-projection and crystallization scheme of the q-ne-kp-fo-mo-aq system reflecting the process of the magmatic rock crystallization. The rocks are compositionally marginal between the normal series and the alkaline one, and from the normative quartz group to the normative montichellite one.

(in English, стр.6, fig. 3, tables. 0, ref 12, Adobe PDF, Adobe PDF 0 Kb)