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A. V. Maslov N. V. Kozina A. A. Klyuvitkin A. N. Novigatsky A. S. Filippov V. P. Shevchenko 《Oceanology》2016,56(4):552-563
The features of the distribution of some rare and trace elements in modern bottom sediments of the Caspian Sea have been studied from samples collected during cruises 35, 39, and 41 of the R/V Rift and the cruise of the R/V Nikifor Shurekov in 2013. It was established that bottom sediments in different areas of the Caspian Sea vary to some degree in the contents of Zr, Hf, Th, V, Cr, Co, Ni, Cu, Sr, and Ba in comparison to suspended matter discharged by the Volga River and rivers originating in the Caucasus. As follows from the results of a comparison of the geochemical features of modern bottom sediments of the Volga River delta and different sedimentary subsystems of the Caspian Sea with the chemical composition of Middle Archean granitoids and Paleozoic and Mesozoic–Cenozoic basalts, which are regarded as geochemical images of such provenance areas as the basement of East European Platform, Urals, and Caucasus, none of these regions is considered the dominant provenance area for all sedimentary subsystems of the Caspian Sea region. Here, the revealed similarity between modern bottom sediments of the northern, central and southern Caspian Sea regions, the Volga River delta, and Post-Archean average Australian shale (PAAS) in some parameters, including REE spectra, assumes that the Volga River discharge plays a dominant role in the formation of the geochemical image of Caspian Sea subsystems. The role of clastics, including the fine-grained fraction, which is supplied to the Caspian Sea from the Caucasus region and Elburz Mountains, is insignificant already in the coastal area, which is determined both by influence of the marginal filter (MF) and large-scale cholestatic current circulation. 相似文献
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Maslov A. V. Kuznetsov A. B. Politova N. V. Kozina N. V. Novigatsky A. N. Shevchenko V. P. 《Doklady Earth Sciences》2019,485(1):268-272
Doklady Earth Sciences - The isotopic characteristics (εNd, 207Pb/206Pb, and 87Sr/86Sr) of the modern bottom sediments sampled in the Barents Sea during the 67th voyage of the R/V Akademik... 相似文献
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Doklady Earth Sciences - The dispersed sedimentary material in the snow–ice cover near the North Pole was analyzed directly for the first time. The composition of sediments in the... 相似文献
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I. A. Nemirovskaya A. P. Lisitzin A. N. Novigatsky Z. U. Redzhepova O. M. Dara 《Doklady Earth Sciences》2016,469(1):680-685
Along the transatlantic section from Ushuaia to Gdańsk (March 26–May 7, 2015; cruise 47 of R/V Akademik Ioffe), data were obtained on the concentrations of aerosols in the near-water layer of the atmosphere and of particulate matter in surface waters, as well as of organic compounds within the considered matter (Corg, chlorophyll a, lipids, and hydrocarbons). The concentrations of aerosols amounted to 1237–111 739 particles/L for the fraction of 0.3–1 μm and to 0.02–34.4 μg/m2/day for the matter collected by means of the network procedure. The distribution of aerosols is affected by circumcontinental zoning and by the fluxes from arid areas of African deserts. The maximum concentration of the treated compounds were found in the river–sea frontal area (the runoff of the Colorado River, Argentina), as well as when nearing the coasts, especially in the English Channel. 相似文献
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A. P. Lisitzin A. N. Novigatsky R. A. Aliev V. P. Shevchenko A. A. Klyuvitkin M. D. Kravchishina 《Doklady Earth Sciences》2015,465(2):1253-1256
A new approach using dispersed organic matter of the water column in sedimentation traps in comparison with the surface layer of the bottom sediments is applied for the study of marine sedimentation. This approach provides the opportunity for an in situ (by fluxes of sedimentary matter in the water column) study of modern sedimentation in the surface layers of the bottom sediments and tracing the changes in the environment and climate at a new technological level. This also allows us to choose the reverse task: to reconstruct the fluxes of the matter and chemical elements in ancient seas by the rates (or absolute masses) of sedimentation. 相似文献
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Lukashin V. N. Kravchishina M. D. Klyuvitkin A. A. Novigatsky A. N. Politova N. V. 《Oceanology》2019,59(3):381-391
Oceanology - The first data on a long-term study of the Volga River marginal filter are reported. The concentrations of suspended particulate matter, particulate chemical elements, and trace... 相似文献
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Radchenko I. G. Ilyash L. V. Shevchenko V. P. Zdorovennov R. E. Novigatsky A. N. Politova N. V. Tolstikov A. V. 《Oceanology》2019,59(3):305-315
Oceanology - The species composition and biomass of phytoplankton, as well as hydrological characteristics, were estimated during four spatial surveys in the Subarctic tidal Kem’ River... 相似文献