The Seismotectonics and Seismicity of the Laptev Sea Region: The Current Situation and a First Experience in a Year-Long Installation of Ocean Bottom Seismometers on the Shelf

Крылов, А. Л.; Ivashchenko, A. I.; Ковачев, С. А.; Tsukanov, N. V.; Kulikov, Mikhail E.; Medvedev, Igor; Ilinskiy, Dmitry A.; Shakhova, Natalia

doi:10.1134/s0742046320060044

Cited by 17 publications

(10 citation statements)

References 29 publications

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“…The Olenek and Anabar bays are influenced by nearly N-S extension. It disagrees with a strike-slip regime, determined by Franke et al (2000), and confirms the data by Fujita et al (2009) and Krylov et al (2020).…”

Section: Table 1 Stress Tensor Inversion Resultssupporting

confidence: 70%

“…To the south, the boundary becomes diffuse (Gaina et al., 2002). It is shifted 140–150 km eastward along the Khatanga‐Lomonosov Fracture and traced in the eastern Laptev Sea in earthquake epicentral field, active normal faults and increased surface heat flow (Drachev & Shkarubo, 2017; Drachev et al., 2003; Krylov et al., 2020). In the southern part of the shelf, it is determined in the Buor‐Khaya (Gaina et al., 2014) or Yana Bays (Bird, 2003; Imaeva, Imaev, et al., 2017).…”

Section: Introductionmentioning

confidence: 99%

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Crustal Stresses in the East Arctic Region From New Data on Earthquake Focal Mechanisms

Filippova,

Melnikova

2023

Tectonics

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East Arctic is a key region for understanding the current geodynamic pattern and lithospheric evolution of the whole Arctic. To close an evident gap in regional seismic data, we calculate source parameters for 103 earthquakes (Mw ≥ 4.2, 1990–2021) and compile a representative uniform dataset including source depths, scalar seismic moments, moment magnitudes, and focal mechanisms. On its basis, crustal stresses are estimated within four blocks with the homogeneous stress field. Extension dominates along the Gakkel Ridge and over most of the Laptev Sea shelf. On the continent and east and west of the shelf, it is replaced by compression. The obtained results indicate that the spreading axis of the Gakkel Ridge does not continue to the Laptev Sea shelf and evidence for the Eurasian–North American plate boundary crosses the eastern Laptev Sea shelf and is likely to pass to the Chersky Range through the Yana Bay.

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Section: Table 1 Stress Tensor Inversion Resultssupporting

confidence: 70%

Section: Introductionmentioning

confidence: 99%

Crustal Stresses in the East Arctic Region From New Data on Earthquake Focal Mechanisms

Filippova,

Melnikova

2023

Tectonics

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“…Unlike the MPSSR and Typhoon models described above, the GNS and GNS-C models are used for scientific applications of the IO RAS in deep waters (up to 6000 m) [19,20]. It was developed by the IP Ilinskiy A.D. and IO RAS.…”

Section: Ocean-bottom Seismographs (Obs)mentioning

confidence: 99%

“…In a series of scientific cruises, we obtained a significant number of signals from local and remote earthquakes in the Laptev Sea recorded by all the OBS models described above [19,20,27,[33][34][35][36][37]. Examples of waveforms and Fourier spectra are shown in Figure 16.…”

Section: Investigation Of Deep Roots Of Gas Flares and Their Relation...mentioning

confidence: 99%

“…Moreover, seismotectonic events can affect the intensity of gas vents [13][14][15][16][17][18]. Thus, the processes of active gas seepage from marine sediments are of interest as an independent type of geohazards and are also a companion of active tectonic processes [19,20]. Gas seepage is accompanied by the formation of specific relief forms-pockmarks, and in areas saturated with natural gas, specific ping-like structures are formed.…”

Section: Introductionmentioning

confidence: 99%

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A Complex of Marine Geophysical Methods for Studying Gas Emission Process on the Arctic Shelf

Крылов

Ananiev

Chernykh

et al. 2023

Sensors

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The Russian sector of the arctic shelf is the longest in the world. Quite a lot of places of massive discharge of bubble methane from the seabed into the water column and further into the atmosphere were found there. This natural phenomenon requires an extensive complex of geological, biological, geophysical, and chemical studies. This article is devoted to aspects of the use of a complex of marine geophysical equipment applied in the Russian sector of the arctic shelf for the detection and study of areas of the water and sedimentary strata with increased saturation with natural gases, as well as a description of some of the results obtained. This complex contains a single-beam scientific high-frequency echo sounder and multibeam system, a sub-bottom profiler, ocean-bottom seismographs, and equipment for continuous seismoacoustic profiling and electrical exploration. The experience of using the above equipment and the examples of the results obtained in the Laptev Sea have shown that these marine geophysical methods are effective and of particular importance for solving most problems related to the detection, mapping, quantification, and monitoring of underwater gas release from the bottom sediments of the shelf zone of the arctic seas, as well as the study of upper and deeper geological roots of gas emission and their relationship with tectonic processes. Geophysical surveys have a significant performance advantage compared to any contact methods. The large-scale application of a wide range of marine geophysical methods is essential for a comprehensive study of the geohazards of vast shelf zones, which have significant potential for economic use.

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Seismicity in the far Arctic areas: Severnaya Zemlya and the Taimyr Peninsula

et al. 2021

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The Seismotectonics and Seismicity of the Laptev Sea Region: The Current Situation and a First Experience in a Year-Long Installation of Ocean Bottom Seismometers on the Shelf

Cited by 17 publications

References 29 publications

Crustal Stresses in the East Arctic Region From New Data on Earthquake Focal Mechanisms

Crustal Stresses in the East Arctic Region From New Data on Earthquake Focal Mechanisms

A Complex of Marine Geophysical Methods for Studying Gas Emission Process on the Arctic Shelf

Seismicity in the far Arctic areas: Severnaya Zemlya and the Taimyr Peninsula

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