REENTRANTS AS ELEMENTS OF CRATONAL MARGINS AND THEIR PETROLEUM POTENTIAL
A.K. Basharin and S.Yu. Belyaev
Institute of Oil and Gas Geology, Siberian Branch of the RAS, 3 prosp. Akad. Koptyuga, Novosibirsk, 630090, Russia
Keywords: North American craton, North Asian craton, reentrant, promontory, petroleum potential
Pages: 141-151
Abstract
The paper considers the Neogean evolution of the North American and North Asian cratons. Ophiolite zones and major faults on the western margin of North Asia and the southeastern margin of North America are interpreted as zigzag outlines of Riphean-Paleozoic stable blocks that rifted off the Rodinia supercontinent and were offset along transform faults. The original boundaries of the blocks were smoothed out by later tectonism and are poorly pronounced in the present-day framework. Reentrants of any type, age, and facies are zones favorable for oil and gas accumulation as their folded sedimentary complexes may be both source and reservoir rocks.
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