Title

I. V. Kudryavtsev

FEATURES OF MATERIAL COMPOSITION OF ORTHOGNEISSES FROM THE EASTERN EDGE OF AMERY ICE SHELF (PRINCESS ELIZABETH LAND), EAST ANTARCTICA

Using petrochemical and geochemical data analysis, it was revealed that andesite­basalt association was protolith of Pickering suite rocks. This association could include two rock types having different magma sources and/or generation conditions. Geochemical features of Manning suite orthopyroxene gneisses indicate their magmatic origin and genetic relationship with Pickering suite orthogneisses. Therefore consolidated volcanogenic­sedimentary association could be proposed as protholith of Pickering and Manning series.
Keywords: Mesoproterozoic, metamorphic rocks, geochemical data, Amery Ice Shelf, East Antarctica.