MORPHOLOGY AND SEDIMENTARY COVER STRUCTURE OF THE GAKKEL RIDGE’S LONG SEGMENTS

A. L. Piskarev; Пискарев А. Л.; V. D. Kaminsky; Каминский В. Д.; V. A. Poselov; Поселов В. А.; A. A. Kireev; Киреев А. А.; V. A. Savin; Савин В. А.; O. E. Smirnov; Смирнов О. Е.; D. V. Bezumov; Безумов Д. В.; G. I. Ovanesian; Ованесян Г. И.; D. V. Elkina; Элькина Д. В.

doi:10.31857/S2686739722602526

MORPHOLOGY AND SEDIMENTARY COVER STRUCTURE OF THE GAKKEL RIDGE’S LONG SEGMENTS

Authors: Piskarev A.L.¹^,2, Kaminsky V.D.¹, Poselov V.A.¹, Kireev A.A.¹, Savin V.A.¹, Smirnov O.E.¹, Bezumov D.V.¹, Ovanesian G.I.¹, Elkina D.V.¹
Affiliations:
1. Russian Research Institute of Geology and Mineral Resources of the World Ocean named after Academician I.S. Gramberg (FSBI “VNIIOkeangeologia”)
2. St. Petersburg State University
Issue: Vol 509, No 1 (2023)
Pages: 14-19
Section: GEOLOGY
Submitted: 30.01.2025
Published: 01.03.2023
URL: https://cijournal.ru/2686-7397/article/view/649700
DOI: https://doi.org/10.31857/S2686739722602526
EDN: https://elibrary.ru/THHRAW
ID: 649700

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Abstract

The rift valley of the Gakkel Ridge was divided into three segments according to the sub-bottom profilling and seismoacoustic studies, carried out by R/V “Akademik Fedorov” at the Gakkel Ridge in 2019–2020, and on seismic data of 2011–2015. West of 75° E, the rift valley crosses the Gakkel Ridge approximately in the middle, as it was expected based on the assumption that the rift valley runs along the spreading axis that formed this ridge. East of 75° E the rift valley shifts to the southwestern edge of the ridge and, thus, it can be concluded that the spreading axis jumped to its present position relatively recently (in the Pliocene). Finally, to the south of the Gakkel caldera (about 120° E, 81° N), the rift valley is manifested itself in the sections as a young graben in many kilometers of sediments.

Keywords

Gakkel Ridge, seismoacoustics, rift valley, sedimentary cover, spreading, tectonics

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