QUATERNARY DEPOSITS OF THE PRITAYMYR ISLANDS (the Kara Shelf)
E.A. Gusev1, Ya.D. Yarzhembovsky1, A.A. Makariev2, A.N. Molodkov3, F.E. Maksimov4, N.V. Kupriyanova1, N.A. Kostromina1, O.V. Rudenko5, A.V. Krylov6, V.V. Sharin1, A.Yu. Sharapova6
1Gramberg All-Russia Research Institute of Geology and Mineral Resources of the World Ocean, St. Petersburg, Russia
2Polar Marine Geosurvey Expedition, St. Petersburg, Russia
3Tallinn University of Technology, Tallinn, Estonia
4St. Petersburg State University, St. Petersburg, Russia
5Orel State University, Orel, Russia
6A.P. Karpinsky Russian Geological Research Institute, St. Petersburg, Russia
Keywords: Quaternary deposits, Neopleistocene, Holocene, radiocarbon, luminescent and uranium-thorium chronology, Kara Sea, Islands
Abstract
The rarely visited islands of the Kara Sea in its Pritaymyr zone have been studied during a geological survey on the scale 1: 1,000,000. The Quaternary deposits of the islands are represented by the Middle Neopleistocene to Holocene marine, lacustrine-marsh, alluvial and slope sediments. New radiocarbon and uranium-thorium dating has been obtained for the Quaternary sediments, using organic remains (wood, peat, mollusk shells). For the first time, dating on sandy sediments was obtained for the islands, using the method of infrared optical-stimulated luminescence (IR-OSL). The sediments of marine terraces are of the greatest distribution on the islands; these sediments can be correlated with the Karginsky (MIS 3) horizon, lacustrine-marsh sediments and deposits of the cover complex, containing flora remains, mainly the Holocene.
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