Abstract
Based on the new geophysical survey data within the South Kara basin, a system of rift troughs was established. The time of formation of the rifts was the Late Permian-Early Triassic by analogy with that of the West Siberian basin. It is probable that inversion processes took place in the Middle Triassic in rifts, located close to Novaya Zemlya. Morphologically, the rifts are represented mainly by semi-grabens. In plan view, they form closed isometric basins, similar in shape to pull-apart basins, which formed as result of sinistral transtension. The Upper Triassic sediments are widespread throughout the basin, forming the lower part of the post-rift sedimentary cover.
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