Cover of the Last Glaciation Deposits in the Eastern Barents Sea: Specificity of Composition, Thickness Distribution, Immensity, and Peculiarity of Structural Forms

Epshtein, O. G.; Dlugach, A. G.; Starovoytov, A. V.

doi:10.1134/s1028334x19080208

Cited by 3 publications

(1 citation statement)

References 4 publications

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“…In the Cenozoic era, this region developed under the influence of several glaciations when ice sheets covered the entire Barents Sea shelf [ 6 , 7 ]. As a result of intense glacial erosion during the Cenozoic era, the Quaternary deposits lay unconformable on the Mesozoic series and are represented in the lower intervals by a complex of moraines that differ in age and genesis, mainly by dense, massive, almost impermeable clays with admixture of gravel material [ 8 ]. Glacial deposits seem to be a good lithological barrier for fluids migrating from the deeply buried sedimentary sequence to the sea bottom surface and are often covered with rather thin Upper Pleistocene glacial–marine and Holocene marine sediments.…”

Section: Introductionmentioning

confidence: 99%

Structure of Benthic Microbial Communities in the Northeastern Part of the Barents Sea

Stroeva,

Klyukina,

Vidishcheva

et al. 2024

Microorganisms

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The Barents Sea shelf is one of the most economically promising regions in the Arctic in terms of its resources and geographic location. However, benthic microbial communities of the northeastern Barents Sea are still barely studied. Here, we present a detailed systematic description of the structures of microbial communities located in the sediments and bottom water of the northeastern Barents Sea based on 16S rRNA profiling and a qPCR assessment of the total prokaryotic abundance in 177 samples. Beta- and alpha-diversity analyses revealed a clear difference between the microbial communities of diverse sediment layers and bottom-water fractions. We identified 101 microbial taxa whose representatives had statistically reliable distribution patterns between these ecotopes. Analysis of the correlation between microbial community structure and geological data yielded a number of important results—correlations were found between the abundance of individual microbial taxa and bottom relief, thickness of marine sediments, presence of hydrotrolite interlayers, and the values of pH and Eh. We also demonstrated that a relatively high abundance of prokaryotes in sediments can be caused by the proliferation of Deltaproteobacteria representatives, in particular, sulfate and iron reducers.

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Section: Introductionmentioning

confidence: 99%

Structure of Benthic Microbial Communities in the Northeastern Part of the Barents Sea

Stroeva,

Klyukina,

Vidishcheva

et al. 2024

Microorganisms

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Late Glacial Glaciomarine and Holocene Marine Sediments in the Eastern Part of the Barents Sea: Structure, Composition, Thickness, and Conditions of Formation

Epshtein

Dlugach²,

Starovoytov

2022

Moscow Univ. Geol. Bull.

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The Extent of Glaciation in the Pechora Sea, Eurasian Arctic, Based on Submarine Glacial Landforms

et al. 2023

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The Pechora Sea is optimally located for studying the coalescence of a glacial and periglacial continental shelf zone in the high Arctic. Here, we present data acquired during cruises of the RV Akademik Nikolaj Strakhov in 2018–2021, revealing the distribution of submarine glacial landforms in the central part of the Pechora shelf area. Based on moraines and the distribution of glacial lineations, the extent of the ice sheet during the Last Glacial Maximum (LGM) is proposed. The crests of the moraine ridges and the slopes of their sides express a variation in morphology, and the ridges combine into irregular complexes. The moraines are primarily composed of coarse cobble-sized material with an addition of coarse sand and other sedimentary fractions. The mapped glacial landforms clearly indicate that an ice sheet extended over the area, while the Pechora basin, at the same time, was comprised of lowland characterized by a cryogenic subaerial landscape. Based on the result from this study, the extent and ice-flow pattern of the Barents-Kara Ice Sheet during the LGM were determined.

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Cover of the Last Glaciation Deposits in the Eastern Barents Sea: Specificity of Composition, Thickness Distribution, Immensity, and Peculiarity of Structural Forms

Cited by 3 publications

References 4 publications

Structure of Benthic Microbial Communities in the Northeastern Part of the Barents Sea

Structure of Benthic Microbial Communities in the Northeastern Part of the Barents Sea

Late Glacial Glaciomarine and Holocene Marine Sediments in the Eastern Part of the Barents Sea: Structure, Composition, Thickness, and Conditions of Formation

The Extent of Glaciation in the Pechora Sea, Eurasian Arctic, Based on Submarine Glacial Landforms

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