Figure 25. Schematic map of petroleum potential in the Barents-Kara
shelf based on the results of neotectonic analysis.
1 - highly promising areas of the neotectonically inherited
continental-margin and intracontinental
platforms with maximum sedimentary thicknesses; 2 - promising
areas of marginal and intracontinental
platforms with thick sediments that were moderately lowered during recent time;
3 - promising areas of prograding continental slopes with thick Cenozoic
clinoforms; 4 - low-promising areas of the reactivated outer
periphery of the continental-margin platform, where differential
crustal movements and recent faults might
have destroyed hydrocarbon accumulations; 5 - low-promising areas
of marginal and intracontinental
platforms with thin sediments; 6 - low-promising areas of old platforms
unaffected by neotectonics; 7 - nonpromising areas of neotectonically
raised shields, orogens, and ridges of platform folded basements;
8 - nonpromising areas of Cenozoic spreading-type oceanic platforms;
9 - boundaries of areas with varying
petroleum prospects; 10 - Late Mesozoic-Cenozoic faults controlling
hydrocarbon accumulations; 11 - transform faults;
12 - shelf-edge flexure-fault zone (a),
same reworked by recent graben-shaped rifts; 13 - contact between
the oceanic and the continental crust.