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Vol. 12 (2009 year), No. 3

Nerovich L.I., Bajanova T.B., Savchenko E.E., Serov P.A., Yekimova N.A.
New data on geology, petrography, isotope geochemistry and PGE mineralization of the Monchetundra intrusion

The paper presents new Sm-Nd isotope-geochronological and geochemical data for the ore-bearing rock of the Fedorovo-Pansky Palaeoproterozoic layered complex (Kola Peninsula) and Nottrask layered intrusion (Sweden). For the first time, Sm-Nd dating procedure has applied sulphides as new minerals-geochronometers that allow direct dating of ore-forming events. The resultant ages of 2475В±37 Ma for the gabbronorite of the Fedorovo-Pansky complex and of 1740В±27 Ma for the gabbro of the Nottrask intrusion have been interpreted as the time of ore-forming processes in the two intrusions. Thus, it has been demonstrated that sulphides may be used as minerals-geochronometers for Sm-Nd isotope-geochronological investigations.

(in Russian, стр.17, fig. 8, tables. 3, ref 14, Adobe PDF, Adobe PDF 0 Kb)