Features of Bitumoid Distribution in Bottom Sediments of the Barents Sea

Oceanology ◽  
2020 ◽  
Vol 60 (6) ◽  
pp. 831-839
Author(s):  
Yu. S. Glyaznetsova ◽  
I. A. Nemirovskaya
Keyword(s):  
Bottom Sediments ◽  
Barents Sea ◽  
The Barents Sea

Evaluation of the modern geoecological state of the fjords of the eastern Barents sea

2021 ◽  
pp. 899-943
Author(s):  
V.A. Shakhverdov ◽  
◽  
D.V. Ryabchuk ◽  
M.A. Spiridonov ◽  
V.A. Zhamoida ◽  
...  
Keyword(s):  
Bottom Sediments ◽  
Industrial Development ◽  
Barents Sea ◽  
Chemical Elements ◽  
Environmental Damage ◽  
North West ◽  
Geochemical Zoning ◽  
The North ◽  
The Barents Sea ◽  
Main Components

A brief analysis of the history of environmental geological study of the Barents Sea is given. It shows that at the beginning of industrial development the geological environment was characterized by a low level of disturbance and pollution. On example of the Kola Bay, an assessment of the current environmental geological conditions of the fjords in the eastern part of the Barents Sea is given. Seismic-acoustic studies confirm the predominantly tectonic origin of the bay and the hazardous spread of gravitational rocks movement within the coastal slopes. The background geochemical characteristics of recent bottom sediments are quantified. It is shown that geochemical zoning of the bottom of the bay is a consequence of both natural and anthropogenic processes. According to the content of Cu, Zn, As, Cd, Pb, Hg and hexane-soluble petroleum products (PP) in the bottom sediments, the characteristics of various areas were obtained. It is shown that the distribution of PP and several other pollutants in the main components of aquatic and coastal geosystems is a leading element of the environmental monitoring system, quantitative assessment of anthropogenic impact and accumulated environmental damage. Active economic activity within the southern leg of the Kola Bay, as well as the naval bases, significantly affects the distribution of chemical elements. The data concerning distribution of chemical elements forms in bottom sediments are given that suggest a high probability of secondary pollution of the bottom water when the physicochemical conditions of sedimentation processes change. A comparative analysis showed that bottom sediments of the Kola Bay are characterized by the highest concentration of chemical elements in the North-West Region of the Russian Federation.

Manifestation of the Gothenburg geomagnetic field excursion in the Barents Sea bottom sediments

2007 ◽  
Vol 47 (6) ◽  
pp. 781-786 ◽  
Author(s):  
E. G. Guskova ◽  
O. M. Raspopov ◽  
A. L. Piskarev ◽  
V. A. Dergachev
Keyword(s):  
Bottom Sediments ◽  
Geomagnetic Field ◽  
Barents Sea ◽  
The Barents Sea ◽  
Sea Bottom ◽  
Field Excursion

scholarly journals Distribution of Polychaeta Communities in the Western and Northern Part of the Barents Sea

2020 ◽  
Author(s):  
Dinara Dikaeva ◽  
Elena Frolova
Keyword(s):  
Species Composition ◽  
Bottom Sediments ◽  
Barents Sea ◽  
Bottom Topography ◽  
Silty Clay ◽  
The Barents Sea ◽  
Structure Of Communities ◽  
Composition And Structure ◽  
Quantitative Characteristics ◽  
Hard Soils

Species composition and quantitative characteristics of polychaetes in the western and northern parts of the Barents Sea were analyzed on the basis of the material collected in July and November 2017 on MMBI expeditions aboard the RV “Dalniye Zelentsy”. Three faunistic polychaete complexes were revealed, depending on environmental conditions in the study area. A change in species composition and structure of communities from the bottom topography, structure of bottom sediments and bottom hydrodynamics were noted. An increase in biomass and density of polychaetes settlement was revealed in deep-water areas of the Barents Sea, on soft silty-clay soils, where the dominant species is Spiochaetopterus typicus. A decrease in quantitative characteristics of polychaetes was observed in shallow areas, on hard soils, in the zone of intensive erosion of bottom sediments as a result of warm and cold currents interaction, where the polychaete Nothria hyperborea dominated.

Isotopic Composition of Nd, Pb, and Sr in Modern Bottom Sediments of the Barents Sea

2019 ◽  
Vol 485 (1) ◽  
pp. 268-272 ◽  
Author(s):  
A. V. Maslov ◽  
A. B. Kuznetsov ◽  
N. V. Politova ◽  
N. V. Kozina ◽  
A. N. Novigatsky ◽  
...  
Keyword(s):  
Isotopic Composition ◽  
Bottom Sediments ◽  
Barents Sea ◽  
The Barents Sea

Rare and Trace Elements in the Modern Bottom Sediments of the Barents Sea

2020 ◽  
Vol 55 (1) ◽  
pp. 1-23
Author(s):  
A. V. Maslov ◽  
N. V. Politova ◽  
N. V. Kozina ◽  
V. P. Shevchenko ◽  
T. N. Alekseeva
Keyword(s):  
Trace Elements ◽  
Bottom Sediments ◽  
Barents Sea ◽  
The Barents Sea

Co, Hf, Ce, Cr, Th, and REE systematics of modern bottom sediments of the Barents sea

2019 ◽  
Vol 485 (2) ◽  
pp. 207-211
Author(s):  
A. V. Maslov ◽  
N. V. Politova ◽  
V. P. Shevchenko ◽  
N. V. Kozina ◽  
A. N. Novigatsk ◽  
...  
Keyword(s):  
Bottom Sediments ◽  
Barents Sea ◽  
Western Coast ◽  
Novaya Zemlya ◽  
The North ◽  
The Barents Sea ◽  
Franz Josef Land ◽  
Pechora River ◽  
Marine Areas ◽  
Bottom Grab

The Co, Hf, Ce, Cr, Th, and REE systematics are analyzed for modern sediments collected by a bottom grab during the 67th and 68th cruises of R/V “Akademik Mstislav Keldysh” and samples taken in the Barents Sea bays and inlets. Our results indicate that most modern bottom sediments are composed of fine silicoclastic material enhanced with a suspended matter of the North Cape current, which erodes the western coast of Scandinavia, and due to bottom erosion of some marine areas, as well as erosion of rock complexes of the Kola Peninsula, Novaya Zemlya, and Franz Josef Land (local provenances). Material from Spitsbergen also probably played a certain role. In the southern part of the Barents Sea, clastic material is supplied by the Pechora River.

Diatoms and aquatic palynomorphs in the Barents sea sediments: main distribution patterns and use in palaeoceanological studies

2021 ◽  
pp. 64-95
Author(s):  
Ye.I. Polyakova ◽  
◽  
E.A. Novichkova ◽  
E.A. Agafonova ◽  
◽  
...  
Keyword(s):  
Sea Ice ◽  
Continental Slope ◽  
Bottom Sediments ◽  
North Atlantic ◽  
Distinctive Feature ◽  
Barents Sea ◽  
Distribution Patterns ◽  
Diatom Algae ◽  
The Barents Sea ◽  
Sedimentation Conditions

The Chapter deals with the uniqueness of the Barents Sea and adjacent sea areas from the viewpoint of the main groups of phytoplankton (diatom algae and dinoflagellate) development and their reflection in tanatocenoses of bottom sediments. Special attention is paid to the distribution of microfossils in surface waters as an indicator of the modern sea ice and hydrological signal. A distinctive feature of the Barents Sea tanatocenoses is the frequency of re-deposited Paleogene and Cretaceous forms of diatoms and dinocysts. Despite all the difficulties in finding microfossils in bottom sediments, data were obtained on characteristic associations mainly related to the redistribution of relatively warm North Atlantic waters. The issues of microfossils in cores and boreholes located on the Barents Sea shelf and continental slope are considered and the most extensive material on changes in sedimentation conditions in the Pleistocene and Holocene is generalized.

Hydrocarbons in waters and bottom sediments Of the Barents sea

2021 ◽  
pp. 531-547
Author(s):  
I.A. Nemirovskaya ◽  
◽  
A.M. Titova ◽  
A.V. Khramtsova ◽  
◽  
...  
Keyword(s):  
Organic Matter ◽  
Surface Layer ◽  
Organic Carbon ◽  
Bottom Sediments ◽  
Suspended Matter ◽  
Biochemical Composition ◽  
Barents Sea ◽  
Oil Pollution ◽  
Early Summer ◽  
The Barents Sea

Hydrocarbons in water, suspended matter and bottom sediments of the Barents Sea were studied based on materials from expeditions to the RV Akademik Mstislav Keldysh in 2016–2019. It is shown that at present there is no oil pollution in open areas of the Barents Sea. With the transition from early summer (2019) to autumn (2016), there was a decrease in hydrocarbon concentrations in surface waters, caused by a change in the biochemical composition of organic matter (possibly due to a decrease in the area of ice). With depth, the HC content decreased mainly. An exception was observed in the area of gutters and deposits, where in the bottom nepheloid layers there was an increase in the concentration of hydrocarbons in suspension and in the surface layer of bottom sediments, and in the thickness of the sediments there was no dependence on their distribution and organic carbon.

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