Инд. авторы:	Вологина Е.Г., Калугин И.А., Дарьин А.В., Астахов А.С., Штурм М., Черняева Г.П., Кулагина Н.В., Колесник А.Н.
Заглавие:	Позднеголоценовое осадконакопление в активных геологических структурах чукотского моря
Библ. ссылка:	Вологина Е.Г., Калугин И.А., Дарьин А.В., Астахов А.С., Штурм М., Черняева Г.П., Кулагина Н.В., Колесник А.Н. Позднеголоценовое осадконакопление в активных геологических структурах чукотского моря // Геодинамика и тектонофизика. - 2018. - Т.9. - № 1. - С.199-219. - EISSN 2078-502X.
Внешние системы:	DOI: 10.5800/GT-2018-9-1-0345.; РИНЦ: 35369231;
Реферат:	eng: The article presents the detailed analysis results considering bottom sediments from the Chukchi Sea. Two core samples, b16 and НС-8 were taken from the northern Herald Canyon 150 km northeast from NE Wrangel Island. Core b16 has been studied in more detail. According to the 210Pb measurements, the recent sedimentation rate amounts to 0.9 mm/y-1 at the sampling point. In the bottom layer of the core sample, the minimum concentrations of biogenic components (SiO2bio, Corg, Ntot, and Br) and the increased concentrations of cold-water diatom species Thalassiosira antarctica may result from low biological productivity during the Maunder Minimum. A correlation with recent global warming (11-22 years) is shown by the increased concentrations of SiO2bio, Corg, Ntot, and Br and the decreased values of magnetic susceptibility and X-ray density in the top layer (1-2 cm) of the same core sample. The results of our geochemical and diatom analysis support the available literature data and confirm that the Late Holocene sedimentation in the Chukchi Sea takes place in the zone wherein the water transits from the Pacific to the Arctic Ocean. rus: Представлены результаты комплексного исследования вещественного состава донных осадков, вскрытых двумя кернами в северной части каньона Геральд Чукотского моря. Одна из полученных колонок была выбрана для более детального исследования. Скорость современного осадконакопления в точке отбора этого керна, измеренная по 210Pb, составляет 0.9 мм/год. Минимальные концентрации биогенных компонентов (SiO2биог., Сорг., Nобщ., Br) и увеличение содержаний холодноводного вида диатомей Thalassiosira antarctica в нижнем слое колонки, вероятно, объясняются низкой биологической продуктивностью во время минимума Маундера. Повышенные концентрации SiO2биог, Сорг, Nобщ, Br, пониженные значения магнитной восприимчивости и рентгеновской плотности в самом верхнем интервале разреза (до 1-2 см) соответствуют последним 11-22 годам глобального потепления климата. Результаты геохимического и диатомового анализов подтверждают имеющиеся в литературе данные о том, что позднеголоценовая седиментация в Чукотском море происходит в зоне транзита тихоокеанских вод в Северный Ледовитый океан.
Ключевые слова:	пыльца; диатомеи; элементный состав; скорость современного осадконакопления; донные отложения; Чукотское море; climate reconstruction; pollen; diatoms; elemental composition; Recent sedimentation rate; bottom sediments; Chukchi Sea; реконструкция климата;
Издано:	2018
Физ. характеристика:	с.199-219
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