A BOREHOLE RECORD OF LATE QUATERNARY PERMAFROST ON KURUNGNAKH ISLAND (Lena delta, northeastern Siberia): RECONSTRUCTION OF DEPOSITION ENVIRONMENTS

2019 ◽  
Keyword(s):  
Late Quaternary ◽  
Northeastern Siberia ◽  
Lena Delta

scholarly journals Palaeoenvironmental dynamics inferred from late Quaternary permafrost deposits on Kurungnakh Island, Lena Delta, Northeast Siberia, Russia

2008 ◽  
Vol 27 (15-16) ◽  
pp. 1523-1540 ◽  
Author(s):  
Sebastian Wetterich ◽  
Svetlana Kuzmina ◽  
Andrei A. Andreev ◽  
Frank Kienast ◽  
Hanno Meyer ◽  
...  
Keyword(s):  
Late Quaternary ◽  
Lena Delta

scholarly journals Late Quaternary lake-level changes of Lake El'gygytgyn, NE Siberia

2011 ◽  
Vol 76 (3) ◽  
pp. 441-451 ◽  
Author(s):  
Olaf Juschus ◽  
Maksim Pavlov ◽  
Georg Schwamborn ◽  
Frank Preusser ◽  
Grigory Fedorov ◽  
...  
Keyword(s):  
Water Level ◽  
Lake Level ◽  
Late Quaternary ◽  
Sediment Cores ◽  
Lake Ice ◽  
Oxygen Isotope Stage ◽  
Northeastern Siberia ◽  
Lake El’Gygytgyn ◽  
High Lake Level ◽  
High Lake Levels

AbstractLake El'gygytgyn is situated in a 3.6 Ma old impact crater in northeastern Siberia. Presented here is a reconstruction of the Quaternary lake-level history as derived from sediment cores from the southern lake shelf. There, a cliff-like bench 10 m below the modern water level has been investigated. Deep-water sediments on the shelf indicate high lake levels during a warm Mid-Pleistocene period. One period with low lake level prior to Marine Oxygen Isotope Stage (MIS) 3 has been identified, followed by a period of high lake level (10 m above present). In the course of MIS 2 the lake level dropped to − 10 m. At the end of MIS 2 the bench was formed and coarse beach sedimentation occurred. Subsequently, the lake level rose rapidly to the Holocene level. Changes in water level are likely linked to climate variability. During relatively temperate periods the lake becomes free of ice in summer. Strong wave actions transport sediment parallel to the coast and towards the outlet, where the material tends to accumulate, resulting in lake level rise. During cold periods the perennial lake ice cover hampers any wave activity and pebble-transport, keeping the outlet open and causing the lake level to drop.

scholarly journals Late Quaternary paleoenvironmental records from the western Lena Delta, Arctic Siberia

2011 ◽  
Vol 299 (1-2) ◽  
pp. 175-196 ◽  
Author(s):  
Lutz Schirrmeister ◽  
Guido Grosse ◽  
Moritz Schnelle ◽  
Margret Fuchs ◽  
Matthias Krbetschek ◽  
...  
Keyword(s):  
Late Quaternary ◽  
Arctic Siberia ◽  
Lena Delta

scholarly journals Ground ice and slope sediments archiving late Quaternary paleoenvironment and paleoclimate signals at the margins of El'gygytgyn Impact Crater, NE Siberia

2006 ◽  
Vol 66 (2) ◽  
pp. 259-272 ◽  
Author(s):  
Georg Schwamborn ◽  
Hanno Meyer ◽  
Grigory Fedorov ◽  
Lutz Schirrmeister ◽  
Hans-W. Hubberten
Keyword(s):  
Impact Crater ◽  
Environmental Changes ◽  
Late Quaternary ◽  
Organic Content ◽  
Ground Ice ◽  
Holocene Thermal Maximum ◽  
Northeastern Siberia ◽  
Ice Wedge ◽  
Successive Generations ◽  
Grain Surface

AbstractAn accumulation terrace close to the El'gygytgyn Impact Crater in northeastern Siberia contains stratigraphic and periglacial evidence of the paleoenvironmental and paleoclimatic history and permafrost dynamics during late Quaternary time. A succession of paleo active-layer deposits that mirror environmental changes records periods favorable for the establishment and growth of ice-wedge polygonal networks and sediment variations. These two elements of the periglacial landscape serve as complementary paleoenvironmental archives that can be traced back to ∼ 14,000 cal yr BP. The slope sediments and the ground ice contained therein have prominent relative maxima and minima in properties (grain size, total organic content, oxygen isotopes). They document a regional early Holocene thermal maximum at about 9000 cal yr BP, followed by a transition to slightly cooler conditions, and a subsequent transition to slightly warmer conditions after about 4000 cal yr BP. Results from sedimentary analysis resemble morphological and geochemical (oxygen and hydrogen isotopes) results from ice wedge studies, in which successive generations of ice-wedge polygonal networks record warmer winters in late Holocene time. Moreover, peaks of light soluble cation contents and quartz-grain surface textures reveal distinct traces of cryogenic weathering. We propose a conclusive sedimentation model illustrating terrace formation in a permafrost terrain.

scholarly journals Late Quaternary History of the Accumulation Plain North of the Chekanovsky Ridge (Lena Delta, Russia): A Multidisciplinary Approach

2003 ◽  
Vol 27 (4) ◽  
pp. 277-319 ◽  
Author(s):  
L. Schirrmeister ◽  
G. Grosse ◽  
G. Schwamborn ◽  
A. A. Andreev ◽  
H. Meyer ◽  
...  
Keyword(s):  
Multidisciplinary Approach ◽  
Late Quaternary ◽  
History Of ◽  
Quaternary History ◽  
Lena Delta

scholarly journals Late Quaternary sedimentation history of the Lena Delta

2002 ◽  
Vol 89 (1) ◽  
pp. 119-134 ◽  
Author(s):  
Georg Schwamborn ◽  
Volker Rachold ◽  
Mikhail N Grigoriev
Keyword(s):  
Late Quaternary ◽  
History Of ◽  
Sedimentation History ◽  
Lena Delta
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