scholarly journals Structure of the Khatanga-Lomonosov fracture zone according to seismic data

2019 ◽  
Vol 487 (3) ◽  
pp. 304-309
Author(s):  
E. V. Shipilov ◽  
L. I. Lobkovsky ◽  
S. I. Shkarubo
Keyword(s):  
Continental Margin ◽  
Seismic Data ◽  
Data Interpretation ◽  
Structural Features ◽  
Laptev Sea ◽  
Lomonosov Ridge ◽  
Fracture Zones ◽  
Geodynamic Evolution ◽  
Eurasian Basin ◽  
The Laptev Sea

According to the results of geophysical data interpretation considered the structural features of the Khatanga-Lomonosov fracture zones (HLZ), adapted to the strip joint part on the Laptev Sea continental margin with the structures of the spreading of the Eurasian basin and the Lomonosov ridge. Its reflection in anomalous geophysical fields, in a wave seismic picture on sections is shown on the example of separate links of HLZ and the character of its kinematic interrelations with heterogeneous tectonic elements is illustrated. The tectonic nature, role and place of this fault zone in the geodynamic evolution of the region are substantiated.

scholarly journals On tectonic-geodynamic relationships of the Eurasian basin and the Lomonosov Ridge with the continental margin of Siberia according to new seismic data

2020 ◽  
pp. 34-42
Author(s):  
E.V. Shipilov ◽  
◽  
L.I. Lobkovsky ◽  
T.A. Kirillova ◽  
◽  
...  
Keyword(s):  
Continental Margin ◽  
Seismic Data ◽  
Sedimentary Cover ◽  
Structural Features ◽  
Lomonosov Ridge ◽  
Axial Zone ◽  
Gakkel Ridge ◽  
Development Scheme ◽  
Eurasian Basin ◽  
Stage Development

Basing on the results of the interpretation of new seismic materials, the authors consider the structural features of the southern segments of the Eurasian Basin and the Lomonosov Ridge in the zone of junction with the continental margin of Siberia (the Laptev and East Siberian Seas). Interpretative analysis of the materials shows that the base of the sedimentary cover of the southern segment of the Eurasian Basin, where there are no regular linear magnetic anomalies, is predominantly represented by strongly stretched blocks of the continental basement. The formation the axial zone of spreading of the Gakkel Ridge here took place according to a three-stage development scheme: rifting in the Aptian-Alba and its telescoping development in the Late Cretaceous — Paleocene-Eocene, inherited valley formation in late neotectonic time. The development of the Severny Basin located in the zone of junction of the Lomonosov Ridge with the continental margin is similar to the scenario for the formation of pull-apart basins. Its formation was interconnected with the simultaneously opening adjacent extreme southeastern segment of the Amundsen Basin of the Eurasian Basin.

Molecular Geochemistry of the Dispersed Organic Matter in the Late Cenozoic Sediments of the Laptev Sea Continental Margin and Adjacent Part of the Arctic Ocean

2021 ◽  
Vol 62 (4) ◽  
pp. 460-473
Author(s):  
V.I. Petrova ◽  
G.I. Batova ◽  
A.V. Kursheva ◽  
I.V. Litvinenko ◽  
I.P. Morgunova
Keyword(s):  
Organic Matter ◽  
Continental Margin ◽  
Depositional Environments ◽  
The Arctic ◽  
Geochemical Data ◽  
Laptev Sea ◽  
Lomonosov Ridge ◽  
Late Cenozoic ◽  
Cenozoic Sediments ◽  
The Laptev Sea

Abstract ––The main factors controlling the bulk sedimentation in the Siberian segment of the Lomonosov Ridge (axial part and western slope) and the Laptev Sea continental margin during the late Cenozoic were studied using a complex of geomorphological, lithological, and organic geochemical data. Samples for the study were collected during the cruises of R/V Akademik Fedorov in 2005 and 2007 and nuclear icebreaker Rossiya in 2007. Analysis of the group and molecular composition of the dispersed organic matter (DOM) in bottom sediments has shown that the input of terrigenous sediments enriched in the products of abrasion of lithified rocks determines sedimentation process on the continental slope of the Laptev Sea and in the Amundsen Basin. The individual characteristics of the DOM of the late Cenozoic sediments from the Lomonosov Ridge reflect the wide diversity of sedimentary sources and depositional environments. Subaqueous erosion of edaphogenic products and pre-Holocene sediments plays an important part in sedimentation together with terrigenous flow and ice transport.

scholarly journals Atmospheric controlled freshwater release at the Laptev Sea continental margin

2010 ◽  
Vol 30 (1) ◽  
pp. 5858 ◽  
Author(s):  
Dorothea Bauch ◽  
Matthias Gröger ◽  
Igor Dmitrenko ◽  
Jens Hölemann ◽  
Sergey Kirillov ◽  
...  
Keyword(s):  
Continental Margin ◽  
Laptev Sea ◽  
Freshwater Release ◽  
The Laptev Sea

scholarly journals The depositional environment of the Laptev Sea continental margin: preliminary results from the R/V Polarstern ARK IX-4 cruise

1995 ◽  
Vol 14 (1) ◽  
pp. 43-54
Author(s):  
D. Nürnberg ◽  
D. K. Fütterer ◽  
F. Niessen ◽  
N. Nørgaard-Pedersen ◽  
C. J. Schubert ◽  
...  
Keyword(s):  
Continental Margin ◽  
Depositional Environment ◽  
Laptev Sea ◽  
Preliminary Results ◽  
The Laptev Sea

Tectono-Geodynamic Settings in the Conjugation Zone of the Lomonosov Ridge, Eurasian Basin, and Eurasian Continental Margin

Geotectonics ◽  
2021 ◽  
Vol 55 (5) ◽  
pp. 655-675
Author(s):  
E. V. Shipilov ◽  
L. I. Lobkovsky ◽  
S. I. Shkarubo ◽  
T. A. Kirillova
Keyword(s):  
Continental Margin ◽  
Lomonosov Ridge ◽  
Geodynamic Settings ◽  
Eurasian Basin

scholarly journals Modified Halocline Water over the Laptev Sea Continental Margin: Historical Data Analysis

2012 ◽  
Vol 25 (16) ◽  
pp. 5556-5565 ◽  
Author(s):  
Igor A. Dmitrenko ◽  
Sergey A. Kirillov ◽  
Vladimir V. Ivanov ◽  
Bert Rudels ◽  
Nuno Serra ◽  
...  
Keyword(s):  
Continental Margin ◽  
North Atlantic Ocean ◽  
Source Region ◽  
Vertical Mixing ◽  
Atlantic Water ◽  
Laptev Sea ◽  
Boundary Current ◽  
Salinity Stratification ◽  
The North ◽  
The Laptev Sea

Abstract Historical hydrographic data (1940s–2010) show a distinct cross-slope difference of the lower halocline water (LHW) over the Laptev Sea continental margins. Over the slope, the LHW is on average warmer and saltier by 0.2°C and 0.5 psu, respectively, relative to the off-slope LHW. The LHW temperature time series constructed from the on-slope historical records are related to the temperature of the Atlantic Water (AW) boundary current transporting warm water from the North Atlantic Ocean. In contrast, the on-slope LHW salinity is linked to the sea ice and wind forcing over the potential upstream source region in the Barents and northern Kara Seas, as also indicated by hydrodynamic model results. Over the Laptev Sea continental margin, saltier LHW favors weaker salinity stratification that, in turn, contributes to enhanced vertical mixing with underlying AW.

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