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UDC (551.222: 552.322.91):551.734(235.22)
STRUCTURAL AND TECTONIC SETTING AND PETROCHEMICAL FEATURES OF METABASITES IN THE LATE DEVONIAN DYKES BELTS OF ALTAI
The paper gives general characteristic of geological position and structure of basic rocks within the Late Devonian dyke belts widespread from Western Sayan and Mountain Shoria to Rudny Altai. Metabasites localised in Paleozoic thicknesses of the northwestern Gorny Altai and previously referred to more ancient uneven-aged magmatic complexes were studied and identified with dolerites of the same belts. Petrochemical data were processed and analyzed by using of statistical method of comparison between average values of different pairs of basite samplings and diagrams compiled to indentify paleoenvironments during their formation. The results allow identification of these basites with rift-related continental bodies of the late final development stage of Devonian active continental margin.
Key words: dykes belt, basites, active continental margin, rift, Altai.
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