New data on the geology of one of the poorly studied regions of the Altai-folded area, Kolyvan’-Tomsk folded zone (KTFZ), are reported in this paper. Structural relations, tectonic style, and petrographic type of igneous complexes have been geodynamically interpreted with the help of geochemical and geophysical data. It is shown that the KTFZ is a system of plates of northeastern strike, which thrust over each other in the southeastern direction. The KTFZ structures are composed of complexes of vast back-arc basin which was formed in the rear of a large island-arc system. This system makes up the basement of the southeastern West-Siberian plate. Structures of the island-arc type follow the lateral row (from west to east): outer slope of island arc, outer accretion arc, fragments of inter-arc trough, inner magmatic arc, deep-seated depression, and uplands of the back-arc basin. Three geodynamic stages – island-arc (D2-Cl), collisional (C2-T2), and postcollisional (rifting, MZ) – and corresponding geodynamic complexes are distinguished. The latter quite reliably correlate with typical formations of deep-water depressions and uplands of back-arc basins. The proposed interpretation of the history of the geological development of the KTFZ opens the possibilities for a new approach to evaluation of the region’s prospects for various types of mineral resources.

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First page of GEODYNAMIC COMPLEXES AND STAGES OF DEVELOPMENT OF THE KOLYVAN’-TOMSK FOLDED ZONE (<italic>West Siberia</italic>)
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