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- Title
Structure and Composition of the Holocene–Pleistocene Sediments in the Northern Barents Sea.
- Authors
Sokolov, S. Yu.; Chamov, N. P.; Kurnosov, V. B.
- Abstract
Signs of extensive migration of gas-bearing fluids from the sedimentary cover into the water column were identified in the northern Barents Sea during Cruises 25 and 28 of the R/V Akademik Nikolai Strakhov. The existence of a chain of interrelated processes has been revealed: upward migration of gas-bearing fluids, increase of gas concentration in bottom sediments, deformation of the bottom surface with the formation of gas funnels (pockmarks), and partial discharge of some fluids into the aquatic environment. The article presents the results of a study of the structure and composition of Holocene–Pleistocene sediments along a sub-latitudinal profile through gas vents and beyond them. Despite the degassing and the correspondence of each of the regionally developed bed to a certain stage of postglacial sedimentation, no significant diagenetic changes in the composition of the clay fraction have been established. The increased smectite content in sediments from stations 2511 and 2515 seems to be a consequence of a volcanic event with the formation of an ash layer of intermediate-basic composition and its subsequent transformation.
- Subjects
COMPOSITION of sediments; DIAGENESIS; PARTIAL discharges; DEFORMATION of surfaces; OCEAN travel
- Publication
Lithology & Mineral Resources, 2020, Vol 55, Issue 6, p415
- ISSN
0024-4902
- Publication type
Article
- DOI
10.1134/S0024490220060073