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T.?A.?KhusidEmail author N.?S.?Os’kina N.?P.?Lukashina I.?F.?Gablina N.?V.?Libina A.?G.?Matul 《Stratigraphy and Geological Correlation》2018,26(1):109-120
Comparison of benthic foraminiferal assemblages from the core obtained within the Peterburgskoe ore field (Mid-Atlantic Ridge) and from the core taken five kilometers away from the ore field revealed evident differences in their composition, in the appearance of their shells, and also in the benthic–plankton species ratio. It was noted that the foraminiferal assemblage from the ore-bearing sediments of the Petersburg field was characterized by a higher relative content of benthic species and a large number of chemically altered and broken shells. The first occurrence of the species Osangularia umbonifera, which is able to exist in lowoxygen and CaCO3-undersaturated bottom waters at the boundary of biogenic sediments surrounding the ore field and in the ore-bearing sediments, was established. In the core section sampled beyond the ore field, the composition of foraminiferal assemblages differs insignificantly from typical oceanic ones. 相似文献
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Polyakov A. S. Roslyakov A. G. Lobkovskii L. I. Levchenko O. V. Putans V. A. Ambrosimov A. K. Merklin L. R. Anan’ev R. A. Dmitrevskii N. N. Libina N. V. 《Doklady Earth Sciences》2010,431(1):376-379
By means of mathematical modeling, the parameters of flows forming sedimentary waves on the western slope of the Derbent basin
were estimated. The height of these flows depends on the slope steepness and varies from 25 to 170 m to reach its maximum
values at gentler slope areas. However, the flow rate is independent of the slope steepness and depends only on the concentration
of sediment matter supplied by the flow. At the upper part of the slope (the flow starting), the rate amounts to 0.4–1.4 m/s,
being almost halved at the depths where the sedimentary waves are damped. The present rates of near-bottom currents show pronounced
seasonal differences, and their values are close to flow rates obtained by numerical modeling. 相似文献
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Oceanology - A new area of oceanography, operational oceanography, involves a comprehensive assessment and forecast of the variability of the state of the marine environment. This requires... 相似文献
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Oceanology - The article is devoted to research of warm-water planktonic foraminifera species in the Arctic. The fauna of planktonic and benthic foraminifera in the surface and subsurface layer of... 相似文献
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Gablina I. F. Dmitrenko O. B. Khusid T. A. Libina N. V. 《Lithology and Mineral Resources》2019,54(6):511-523
Lithology and Mineral Resources - Based on materials obtained during Cruise 37 of the R/V Professor Logatchev in the Russian exploration area, the species composition, distribution, and... 相似文献
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Oceanology - Methods for spatial mathematical processing of seafloor digital elevation models (DEM) make it possible us to obtain a wide range of characteristics of the seafloor surface. The... 相似文献