The de Long Trough: a newly discovered glacial trough on the East Siberian continental margin

The de Long Trough: a newly discovered glacial trough on the East Siberian continental margin

書目詳細資料
Parent link:Climate of the Past: international scientific journal.— , 2005-
Vol. 13, iss. 9.— 2017.— [P. 1269-1284]
企業作者: Национальный исследовательский Томский политехнический университет (ТПУ) Институт природных ресурсов (ИПР) Кафедра геологии и разведки полезных ископаемых (ГРПИ)
其他作者: O'Regan M. Matthew, Backman J. Jan, Barrientos N. Natalia, Cronin T. M. Thomas M., Gemery L. Laura, Kirchner N. Nina, Mayer L. Larry, Nilsson J. Johan, Noormets R. Riko, Pearc C. Christof, Semiletov I. P. Igor Petrovich, Stranne C. Christian, Jakobsson M. Martin
總結:Title screen
Ice sheets extending over parts of the East Siberian continental shelf have been proposed for the last glacial period and during the larger Pleistocene glaciations. The sparse data available over this sector of the Arctic Ocean have left the timing, extent and even existence of these ice sheets largely unresolved. Here we present new geophysical mapping and sediment coring data from the East Siberian shelf and slope collected during the 2014 SWERUS-C3 expedition (SWERUS-C3: Swedish – Russian – US Arctic Ocean Investigation of Climate-Cryosphere-Carbon Interactions). The multibeam bathymetry and chirp sub-bottom profiles reveal a set of glacial landforms that include grounding zone formations along the outer continental shelf, seaward of which lies a ?>??65?m thick sequence of glacio-genic debris flows. The glacial landforms are interpreted to lie at the seaward end of a glacial trough – the first to be reported on the East Siberian margin, here referred to as the De Long Trough because of its location due north of the De Long Islands. Stratigraphy and dating of sediment cores show that a drape of acoustically laminated sediments covering the glacial deposits is older than ??50?cal?kyr?BP. This provides direct evidence for extensive glacial activity on the Siberian shelf that predates the Last Glacial Maximum and most likely occurred during the Saalian (Marine Isotope Stage (MIS) 6).
出版: 2017
主題:
электронный ресурс
труды учёных ТПУ
Арктика
Северный Ледовитый океан
шельфы
ледяной покров
在線閱讀:https://doi.org/10.5194/cp-13-1269-2017
格式: 電子 Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=656202

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