Deformational history and thermochronology of Wrangel Island, East Siberian Shelf and coastal Chukotka, Arctic Russia

2017 ◽  
Vol 460 (1) ◽  
pp. 207-238 ◽  
Author(s):  
Elizabeth L. Miller ◽  
V. V. Akinin ◽  
T. A. Dumitru ◽  
E. S. Gottlieb ◽  
M. Grove ◽  
...  
Keyword(s):  
Wrangel Island ◽  
Deformational History ◽  
East Siberian Shelf ◽  
Arctic Russia ◽  
Siberian Shelf

scholarly journals Permafrost and Gas Hydrate Stability Zone of the Glacial Part of the East-Siberian Shelf

Geosciences ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 484
Author(s):  
Anatoly Gavrilov ◽  
Valentina Malakhova ◽  
Elena Pizhankova ◽  
Alexandra Popova
Keyword(s):  
Cross Sections ◽  
Gas Hydrate ◽  
Historical Development ◽  
Lower Boundary ◽  
Time Range ◽  
Stability Zone ◽  
East Siberian Shelf ◽  
Geothermal Flux ◽  
Hydrate Stability ◽  
Siberian Shelf

By using thermal mathematical modeling for the time range of 200,000 years ago, the authors have been studying the role the glaciation, covered the De Long Islands and partly the Anjou Islands at the end of Middle Neopleistocene, played in the formation of permafrost and gas hydrates stability zone. For the modeling purpose, we used actual geological borehole cross-sections from the New Siberia Island. The modeling was conducted at geothermal flux densities of 50, 60, and 75 mW/m2 for glacial and extraglacial conditions. Based on the modeling results, the glaciated area is characterized by permafrost thickness of 150–200 m lower than under extraglacial conditions. The lower boundary of the gas hydrate stability zone in the glacial area at 50–60 mW/m2 is located 300 m higher than the same under extraglacial conditions. At 75 mW/m2 in the area of 20–40 m isobaths, open taliks are formed, and the gas hydrate stability zone was destroyed in the middle of the Holocene. The specified conditions and events were being formed in the course of the historical development of the glacial area with a predominance of the marine conditions peculiar to it from the middle of the Middle Neopleistocene.

The Summer Hydrography and Surface Circulation of the East Siberian Shelf Sea*

1999 ◽  
Vol 29 (9) ◽  
pp. 2167-2182 ◽  
Author(s):  
Andreas Münchow ◽  
Thomas J. Weingartner ◽  
Lee W. Cooper
Keyword(s):  
Surface Circulation ◽  
Shelf Sea ◽  
East Siberian Shelf ◽  
Siberian Shelf

Anthropogenic factor and methane emission on the East-Siberian shelf

2009 ◽  
Vol 429 (2) ◽  
pp. 1488-1491 ◽  
Author(s):  
N. E. Shakhova ◽  
V. A. Yusupov ◽  
A. N. Salyuk ◽  
D. A. Kosmach ◽  
I. P. Semiletov
Keyword(s):  
Methane Emission ◽  
Anthropogenic Factor ◽  
East Siberian Shelf ◽  
Siberian Shelf

New data on the subaerial low-center-polygonal relief and factors controlling its transformation and current state on the East Siberian Shelf

2014 ◽  
Vol 457 (1) ◽  
pp. 873-876 ◽  
Author(s):  
O. V. Dudarev ◽  
A. N. Charkin ◽  
N. N. Dmitrevskiy ◽  
R. A. Anan’ev ◽  
A. A. Meluzov ◽  
...  
Keyword(s):  
Current State ◽  
East Siberian Shelf ◽  
Siberian Shelf

scholarly journals Atmospheric constraints on the methane emissions from the East Siberian Shelf

2015 ◽  
Vol 15 (18) ◽  
pp. 25477-25501 ◽  
Author(s):  
A. Berchet ◽  
P. Bousquet ◽  
I. Pison ◽  
R. Locatelli ◽  
F. Chevallier ◽  
...  
Keyword(s):  
Methane Emissions ◽  
High Variability ◽  
Atmospheric Emissions ◽  
Atmospheric Methane ◽  
Air Masses ◽  
Biogenic Origin ◽  
Siberian Arctic ◽  
Atmospheric Observations ◽  
East Siberian Shelf ◽  
Siberian Shelf

Abstract. Sub-sea permafrost and hydrates in the East Siberian Arctic Ocean Continental Shelf (ESAS) constitute a substantial carbon pool, and a potentially large source of methane to the atmosphere. Previous studies based on interpolated oceanographic campaigns estimated atmospheric emissions from this area at 8–17 Tg CH4 y−1. Here, we propose insights based on atmospheric observations to evaluate these estimates. Isotopic observations suggest a biogenic origin (either terrestrial or marine) of the methane in air masses originating from ESAS during summer 2010. The comparison of high-resolution simulations of atmospheric methane mole fractions to continuous methane observations during the entire year 2012 confirms the high variability and heterogeneity of the methane releases from ESAS. Simulated mole fractions including a 8 Tg CH4 y−1 source from ESAS are found largely overestimated compared to the observations in winter, whereas summer signals are more consistent with each other. Based on a comprehensive statistical analysis of the observations and of the simulations, annual methane emissions from ESAS are estimated in a range of 0.5–4.3 Tg CH4 y−1.

The Role of Ice Cover in the Formation of Bottom Sediment Chemical Composition on the East Siberian Shelf

2021 ◽  
Vol 59 (6) ◽  
pp. 585-598
Author(s):  
A. S. Astakhov ◽  
I.A. Kalugin ◽  
Xuefa Shi ◽  
K. I. Aksentov ◽  
A. V. Darin ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Bottom Sediment ◽  
Ice Cover ◽  
East Siberian Shelf ◽  
Siberian Shelf

The contribution of the East Siberian shelf to the modern methane cycle

2009 ◽  
Vol 79 (3) ◽  
pp. 237-246 ◽  
Author(s):  
Natal’ya Evgen’evna Shakhova ◽  
Valentin Ivanovich Sergienko ◽  
Igor’ Petrovich Semiletov
Keyword(s):  
Methane Cycle ◽  
East Siberian Shelf ◽  
Siberian Shelf

scholarly journals Erratum to: “Predicted methane emission on the East Siberian shelf”

2013 ◽  
Vol 452 (2) ◽  
pp. 1074-1074 ◽  
Author(s):  
N. E. Shakhova ◽  
V. A. Alekseev ◽  
I. P. Semiletov
Keyword(s):  
Methane Emission ◽  
East Siberian Shelf ◽  
Siberian Shelf

scholarly journals To the question of the existence of a strike-slip fault in the Arctic Ocean between the underwater Lomonosov ridge and the adjacent shelf

2019 ◽  
Vol 487 (5) ◽  
pp. 562-565
Author(s):  
V. D. Kaminsky ◽  
G. P. Avetisov ◽  
V. A. Poselov
Keyword(s):  
Fault Zone ◽  
Strike Slip ◽  
Strike Slip Fault ◽  
The Arctic ◽  
Lomonosov Ridge ◽  
Junction Zone ◽  
Tectonic Structures ◽  
Seismological Data ◽  
East Siberian Shelf ◽  
Siberian Shelf

The research object is the junction zone between the underwater Lomonosov ridge and East Siberian shelf. We intend to prove the absence of the strike-slip fault within this junction zone. The existence of the fault zone within this junction zone is still debatable. Formerly used geological and geophysical datawere unsufficient. To remove this ambiguity, seismological data obtained in neighboring areas was applied. Analysis of the earthquakes epicenters in the region showed that in cases of existence of such a fault zone, modern intraplate seismic activity should be certainly registered within its limits. The aseismicity of the junction zone between the underwater Lomonosov ridge and adjacent shelf areas clearly indicates the genetic unity exhisting between these tectonic structures.

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