Geologic Structure of Novaya Zemlya, Vaygach, Pay-Khoy, Polar Urals, and Northern Pechora1
Published:January 01, 1973
V. I. Bondarev, S. V. Cherkesova, V. S. Enokyan, B. S. Romanovich, 1973. "Geologic Structure of Novaya Zemlya, Vaygach, Pay-Khoy, Polar Urals, and Northern Pechora", Arctic Geology, Max G. Pitcher
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The late Paleozoic-early Mesozoic fold system of the Urals-Novaya Zemlya region and the Paleo-zoic-Cenozoic Pechora depression formed on folded pre-Mesozoic basement. The fold system may be divided into the Polar Ural and Pay-Khoy anticlinoriums and the structures of Novaya Zemlya. In the inland part of the Ural region, at the juncture of the fold system and the depression, a set of foredeep basins is recognized.
A complex of Precambrian, Paleozoic, and early Mesozoic (within the foredeep) sedimentary and volcanic rocks is involved in the formation of the Ural-Novaya Zemlya fold system. The thickness of Precambrian formations exceeds 3,000 m; that of Paleozoic rocks is over 10,000 m. Paleozoic (Ordovician and higher) strata transgressively and unconformably overlie the older formations. Important hiatuses in the Paleozoic section are recognized in pre-Late Devonian (Novaya Zemlya) and in Late Carboniferous rocks (Pay-Khoy, Novaya Zemlya).
Volcanic strata of predominantly mafic composition form a considerable part of the Precambrian (Polar Urals, Novaya Zemlya, Pay-Khoy) and Late Devonian sequences. Volcanic rocks of late Mesozoic-early Paleozoic age are found in northeastern Pay-Khoy. The following intrusive complexes are found in this area: an ancient pre-Ordovician and partially pre-Silurian ultramafic to acidic intrusive complex (Polar Urals, Pay-Khoy, Novaya Zemlya), a Caledonian (Silurian-Devonian) complex of ultramafic, mafic, and acidic intrusions (Polar Urals and Novaya Zemlya), and Hercynian mafic and acidic intrusions (Novaya Zemlya and the Polar Urals).
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Following the discovery of Prudhoe Bay oil field in 1968, much attention was turned to the Arctic in the search for giant hydrocarbon accumulations. The Soviets had already proved giant reserves in their West Siberian Basin, and exploration was moving ahead quickly in the Canadian Arctic. Plans were drawn up for an AAPG Symposium on Arctic Geology and held in February 1971. Papers were selected from the Symposium for this publication and cover seven topical groupings: Regional Arctic Geology of Canada, Regional Arctic Geology of the Nordic Countries, Regional Arctic Geology of the USSR, Regional Arctic Geology of Alaska, Comparisons in the North Atlantic Borders, Evolution of the Arctic Ocean Basin, and Economics of Petroleum Exploration and Production in the Arctic.