Publications

Scientific publications

С.А. Светов, А.И. Светова, Т.Н. Назарова.
Ведлозерско-Сегозерский зеленокаменный пояс Центральной Карелии – новые геохронологические данные и интерпретация результатов
// Геология и полезные ископаемые Карелии. Вып. 13. Петрозаводск: КарНЦ РАН, 2010. C. 5–12
S.A. Svetov, А.I. Svetova, Т.N. Nazarova. Vedlozero-Segozero greenstone belt, Central Karelia: new geochronological data and interpretation of results // Geology and useful minerals of Karelia. Issue 13. А.I. Golubev, O.I. Volodichev, 2010. P. 5–12
The authors report the results of the high-precision geochronological study of undated fragments of volcanic assemblages of the Vedlozero-Segozero greenstone belt located in the southeastern Karelian Craton, on the western Vedlozero Block margin. The study of terrigenous zircons from the sedimentary interbeds of Mesoarchean komatiite-basalt assemblages has revealed a discrete time pattern of formation of the Mg-rich series of the Vedlozero-Segozero greenstone belt over the intervals 3.05–2.95 and 2.95–2.91 Ga. The differentiated andesite-dacite-rhyolite series of the Elmus palaeovolcanic edifice was found to have been formed 2866±11 Ma ago. Metamorphic zircons, dated at 2.74–2.67 Ga, are abundant in all assemblages of the southern part of the greenstone belt, suggesting considerable tectono-metamorphic reactivation of the territory that followed a peak (2.74–2.71 Ga) in sanukitoid magmatism. The results obtained add substantially to a scale of geological events and processes at the western end of the Vodlozero Block and make it possible to specify new localities for possible geochronological study, e.g. sedimentary interbeds in komatiite-basalt complexes, a significant source of geochronological information on high-Mg volcanism.

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Last modified: June 1, 2012