The Laptev Sea is a unique region, representing a transition zone from the spreading Gakkel Ridge to the rift system, located on the continental margin of Eurasia. In this study, we construct high-resolution distributions of the depths to the top and bottom of the lithospheric magnetic layer (LML) for the Laptev Sea and adjacent areas using the centroid method and the EMAG2v3 model of the lithospheric magnetic field. Maximum bottom depths of the LML (45–48 km) are observed under the Siberian Platform, in the north of the Verkhoyansk Range, and under the Lena River delta and Buor-Khaya Bay, while the shallowest bottom depths (<34 km) are attributed to the Eurasia Basin and eastern Laptev Sea. Our results indicate that the coldest lithosphere is attributed to the Siberian Platform. The lithospheric heating is observed under the Eurasia Basin and eastern Laptev Sea; the western part of the shelf, Buor-Khaya Bay, and Lena River delta are characterized by the colder lithosphere. The eastern segment of the Khatanga-Lomonosov Fracture is characterized by a local temperature minimum. An area of relatively high temperatures in the east of the shelf passes to the continent through the Yana Bay and covers the Yana-Indigirka lowland. This fact along with the crustal thinning and extension allow us to suggest rifting processes in the considered area.
Источник: Filippova A.I., Filippov S.V., Radziminovich Ya. B. Thermal state of the lithosphere beneath the Laptev Sea: Geodynamic implications from geomagnetic data // Journal of Asian Earth Sciences. 2024. 261. 105970. DOI: 10.1016/j.jseaes.2023.105970Potential Locations of Strong Earthquakes in Bulgaria and the Neighbouring Regions
The largest earthquakes in subduction zones around the Polar Regions.
A correlation is observed between changes in the level of Earth’s seismic activity and increments of the atmospheric methane concentration over the past 40 years.
More“The largest earthquakes in subduction zones around the Polar Regions.”Inverse scattering – Fourier analysis – super-resolution
The paper “Numerical reconstruction from the Fourier transform on the ball using prolate spheroidal wave functions” was published in “Inverse Problems” (Q1 WoS) journal. Doctor of physical and mathematical sciences R.G. Novikov is one of the authors of this article.
More“Inverse scattering – Fourier analysis – super-resolution”Structure of the seismic field of the baikal rift zone
A joint analysis of seismicity in the Baikal Rift Zone (BRZ) is carried out using modern instrumental data (Baikal Branch of the Federal Research Center “Geophysical Survey of the Russian Academy of Sciences,” 1963–2021) combined together with historical and paleoseismological data on earthquakes.
More“Structure of the seismic field of the baikal rift zone”Equations of state of clino‑ and orthoenstatite and phase relations in the MgSiO3 system at pressures up to 12 GPa and high temperatures
The present manuscript «Equations of state of clino‑ and orthoenstatite and phase relations in the MgSiO3 system at pressures up to 12 GPa and high temperatures» was published in the journal «Physics and Chemistry of Minerals» (Web of Science Q2, Scopus Q2, Impact Factor: 1.748), Springer Publishing. This is a joint work of scientists of ITPZ RAS and IZK SB RAS (Irkutsk) from the team of authors Tatiana Sergeevna Sokolova, Peter Ivanovich Dorogokupets and Alona Igorevna Filippova.
More“Equations of state of clino‑ and orthoenstatite and phase relations in the MgSiO3 system at pressures up to 12 GPa and high temperatures”Trigger mechanisms of gas hydrate decomposition, methane emissions and glacier breakup in polar regions as the result of deformation tectonic waves
This paper presents a new revolutionary theory of Academician Leopold Isaevich Lobkovsky on the impact of strong subduction earthquakes on the Earth’s climate and the catastrophic collapse of ice shelves as a trigger effect. A seismogenic-trigger mechanism is proposed for the activation of methane emission on the Arctic shelf in the late 1970s, which caused the onset of a sharp climate warming in the Arctic, as well as the intensive collapse of the ice sheet ice shelves of West Antarctica in the late 20th and early 21st centuries, accompanied by the release of methane from the underlying hydrate-bearing sedimentary rocks and the rapid climate warming in Antarctica.
More“Trigger mechanisms of gas hydrate decomposition, methane emissions and glacier breakup in polar regions as the result of deformation tectonic waves”