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Светов С.А., Светова А.И., Хухма Х., Назарова Т.Н.
Магматические серии вулканических дуг мезоархейской зоны перехода океан-континент на примере западного обрамления Водлозерского блока. Аспекты геохимической типизации и изотопной характеристики
// Геология и полезные ископаемые Карелии. Вып. 9. Петрозаводск: КарНЦ РАН, 2006. C. 5–13
A more accurate geochemical classification of andesiteseries
volcanics of two time levels (3.05–2.90 and 2.90–2.80 Ga), distinguished in the Vedlozero-Segozero Greenstone Belt,
is presented. In addition to the distinctive basalt-andesitedacite-
rhyolite- (BADR), andesite-dacite-rhyolite- (ADR),
adakite- and tholeiite-series volcanic and subvolcanic associations
revealed earlier, komatiite-series high-Mg andesites, high-Nb basalts and andesites were identified. All the series discussed form an integral rock ensemble that characterizes phases in the Mesoarchean convergent interplate protooceanprotocontinent transition zone (Vodlozero Block). Based on precision geochemical characteristics, the authors have formulated classification parameters to subdivide andesite associations into series in the transition zone.
volcanics of two time levels (3.05–2.90 and 2.90–2.80 Ga), distinguished in the Vedlozero-Segozero Greenstone Belt,
is presented. In addition to the distinctive basalt-andesitedacite-
rhyolite- (BADR), andesite-dacite-rhyolite- (ADR),
adakite- and tholeiite-series volcanic and subvolcanic associations
revealed earlier, komatiite-series high-Mg andesites, high-Nb basalts and andesites were identified. All the series discussed form an integral rock ensemble that characterizes phases in the Mesoarchean convergent interplate protooceanprotocontinent transition zone (Vodlozero Block). Based on precision geochemical characteristics, the authors have formulated classification parameters to subdivide andesite associations into series in the transition zone.
geologia9_5.pdf (409 Kb, total downloads: 301)
Last modified: May 31, 2012