DETAILED CHRONOSTRATIGRAPHY OF THE BOTTOM SEDIMENTS FROM THE CENTRAL PART OF THE SEA OF OKHOTSK
V.V. Shapovalov-Chuprynin, M.V. Cherepanova*, N.K. Vagina, and V.K. Fishchenko
Pacific Oceanological Institute, Far Eastern Branch of the RAS,
43 ul. Baltiiskaya, Vladivostok, 690041, Russia
* Institute of Soil Biology, Far Eastern Branch of the RAS,
159 prosp. 100 let Vladivostoku, Vadivostok, 690022, Russia
Keywords: Climate changes, chronostratigraphy, paleomagnetism
Pages: 1065-1079
Abstract
Seven cores from the central part of the Sea of Okhotsk were subjected to a complex analysis by paleomagnetic, diatomic, palynological, geochemical, and isotope-oxygen methods, and the effect of climate fluctuations on some characteristics of bottom sediments have been estimated. Groups of biogeochemical and physical parameters of deposits were specially normalized and summarized for each of the cores. The data obtained were compared with a standard curve and mutually with each other, with various chronostratigraphic benchmarks taken into account. To model generalized curves of uniform parameters, a scheme of correlation has been devised. A spectral analysis of summarized records has revealed some apparent harmonic components. An attempt is made to relate frequencies of these components to the known periods of variation of climatic processes as well as to variations of parameters of the Earth's orbit.
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