FIRST RESULTS OF STRATIGRAPHIC DRILLING IN THE EAST SIBERIAN SEA FOCUSED ON THE GEOLOGICAL STUDIES OF THE SUTURE ZONE OF THE CONTINENTAL SHELF’S MARGINAL STRUCTURES A ND DEEP-WATER AREAS OF THE ARCTIC OCEAN

O. V. Petrov; Петров О. В.; A. I. Ponimaskin; Понимаскин А. И.; M. Yu. Tokarev; Токарев М. Ю.; D. I. Leontiev; Леонтьев Д. И.; T. Yu. Tolmacheva; Толмачева Т. Ю.; E. S. Razumkova; Разумкова Е. С.; O. V. Shurekova; Шурекова О. В.; V. N. Stavitskaya; Ставицкая В. Н.; D. K. Komissarov; Комиссаров Д. К.; A. A. Kolyubakin; Колюбакин А. А.; V. E. Verzhbitsky; Вержбицкий В. Е.; S. M. Danilkin; Данилкин С. М.; N. A. Malyshev; Малышев Н. А.; D. V. Prishchepenko; Прищепенко Д. В.; S. N. Kashubin; Кашубин С. Н.; V. Yu. Tatarinov; Татаринов В. Ю.; E. I. Petrov; Петров Е. И.; A. M. Nikishin; Никишин А. М.; Z. S. Zamotina; Замотина З. С.

doi:10.31857/S268673972360100X

FIRST RESULTS OF STRATIGRAPHIC DRILLING IN THE EAST SIBERIAN SEA FOCUSED ON THE GEOLOGICAL STUDIES OF THE SUTURE ZONE OF THE CONTINENTAL SHELF’S MARGINAL STRUCTURES A ND DEEP-WATER AREAS OF THE ARCTIC OCEAN

Authors: Petrov O.V.¹, Ponimaskin A.I.², Tokarev M.Y.², Leontiev D.I.¹, Tolmacheva T.Y.¹, Razumkova E.S.¹, Shurekova O.V.¹, Stavitskaya V.N.³, Komissarov D.K.⁴, Kolyubakin A.A.⁴^,3, Verzhbitsky V.E.⁴, Danilkin S.M.³, Malyshev N.A.⁴, Prishchepenko D.V.¹, Kashubin S.N.¹, Tatarinov V.Y.⁵^,6, Petrov E.I.⁵, Nikishin A.M.², Zamotina Z.S.²
Affiliations:
1. A.P. Karpinsky Russian Geological Research Institute
2. M.V. Lomonosov Moscow State University
3. Arctic Science Center
4. Rosneft Oil Company
5. Federal Agency on Mineral Resources
6. Institute of Mineralogy, Geochemistry and Crystal Chemistry of Rare Elements
Issue: Vol 512, No 2 (2023)
Pages: 261-271
Section: STRATIGRAPHY
Submitted: 30.01.2025
Published: 01.10.2023
URL: https://edgccjournal.org/2686-7397/article/view/649814
DOI: https://doi.org/10.31857/S268673972360100X
EDN: https://elibrary.ru/MNCKHL
ID: 649814

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Abstract

At the initiative of the Federal Agency on Mineral Resources (Rosnedra), in August 2022, a shallow well was drilled in the East Siberian Sea for the first time with a purpose of geological studying the suture zone of deep waters of the Arctic Ocean and marginal structures of the continental shelf. The well was drilled by VSEGEI and Rosgeologia with the assistance of NK Rosneft and linked to the Rosneft’s long-term stratigraphic drilling program. Drilling was accompanied by continuous seismoacoustic profiling and well thermometry. The maximum well depth was 472 m from the bottom surface; in it, 147.5 m of core was taken to a depth of 268 m. Two sedimentary sequences were identified in the section: the lower Jurassic-Lower Cretaceous gently deformed sequence and the upper Neogene-Quaternary horizontally lying sequence. The sequences are separated by a thick unsampled interval with horizons of ascending thermal water. The Jurassic-Lower Cretaceous sequence occurs as a northwestern-dipping monocline, broken by faults and probably belongs to the complex filling the Zhokhov marginal trough of the Verkhoyansk -Chukotka orogen on the Eastern Arctic shelf.

Keywords

stratigraphic drilling, continental shelf, De-Long uplift, Amerasian basin, seismostratigraphic models, Neocomian, Cenozoic

References

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