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Novigatsky A. N. Lisitzin A. P. Shevchenko V. P. Klyuvitkin A. A. Kravchishina M. D. Politova N. V. 《Oceanology》2020,60(3):372-383
Oceanology - A new approach has been applied to studying marine sedimentation using dispersed sedimentary material in sediment traps compared to the surface layer of bottom sediments. Based on... 相似文献
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Doklady Earth Sciences - The first results of studies of vertical particle fluxes in a hydrothermal sedimentary system of a subpolar area of the Mid-Atlantic Ridge under the influence of... 相似文献
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The quantitative distribution and grain-size composition of the suspended particulate matter (SPM) in the marginal filter
of the Severnaya Dvina River during the summer low-water periods of 2001–2005 were first analyzed in seawater on board of
the vessel immediately after its sampling (without preliminary treatment) using a Coulter counter. This analysis revealed
the main regularities in the transformation of the grain-size spectra at successive salinity steps of the marginal filter
as well as the boundaries between these steps based on the data obtained by direct complex studies of the SPM dispersion.
It is established that the water salinity is the main factor that controls the changes in the grain-size distribution and
the composition of the particulate matter in the marginal filter. The concentrations of the pelitic fraction and the salinity
demonstrate negative correlations between each other. It is shown that the areas characterized by the mass development of
phytoplankton are located along the outer boundary of the marginal filter (at the biological step), where the salinity amounts
to 23–24 psu. The content of the suspended forms of some chemical (lithogenic) elements and the Corg indicating the SPM’s genetic composition and their relations with the grain-size composition of the latter and the environments
are studied. 相似文献
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Oceanology - The article presents the results of studying the distribution and composition of dispersed sedimentary matter (suspended particulate matter, SPM) in the Barents Sea water column. The... 相似文献
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M. D. Kravchishina V. P. Shevchenko A. S. Filippov A. N. Novigatskii O. M. Dara T. N. Alekseeva V. A. Bobrov 《Oceanology》2010,50(3):365-385
The grain-size and mineral composition of the suspended particulate matter (SPM) of the Severnaya Dvina River mouth is studied,
as well as the content of several lithogenic elements in the SPM during the spring flood in May 2004. The data published on
the composition of the riverine SPM in the White Sea basin are very poor. The spring flood period when more than half of the
annual runoff is supplied from the river to the sea in a short time is understood more poorly. The report considers the comparison
results for the grain-size compositions of the SPM and the bottom sediments. The data of laser and hydraulic techniques of
the grain-size analysis are compared. The short-period variations of the SPM concentration and composition representing two
diurnal peaks of the tide level are studied. It is found that the SPM is mainly transferred during the spring flood as mineral
aggregates up to 40 μm diameter. The sandysilty fraction of the riverine SPM settles in the delta branches and channels, and
the bulk of the fine pelitic matter is supplied to the sea. The mineral and chemical composition of the Severnaya Dvina River
SPM is determined by the supply of substances from the drainage basin. This substance is subjected to intense mechanic separation
during the transfer to the sea. The key regularities of the formation of the mineral composition of the SPM during the flood
time are revealed. The effect of the grain-size composition of the SPM on the distribution of the minerals and elements studied
in the dynamic system of the river mouth are characterized. 相似文献
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Maslov A. V. Politova N. V. Klyuvitkin A. A. Kozina N. V. Kravchishina M. D. Novigatsky A. N. Novichkova E. A. Shevchenko V. P. 《Doklady Earth Sciences》2022,507(2):1124-1131
Doklady Earth Sciences - The systematics of REE, Sc, Cr, Zr, and Th in silty-pelitic and pelitic surface bottom sediments sampled during cruises 71, 75, 77, and 80 of the R/V Akademik Mstislav... 相似文献
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M. D. Kravchishina A. P. Lisitzin A. Yu. Lein V. N. Lukashin A. N. Novigatsky A. A. Klyuvitkin 《Doklady Earth Sciences》2016,467(1):284-288
The first data were obtained on the vertical chlorin flux in the water column and its accumulation in the upper layer of sediments of the Caspian Sea. Seasonal variability of the chlorine concentration in sedimentary matter was evaluated. The tendency of decrease in the phytoplankton-synthesized (allochtonous) organic matter content was revealed over approximately the past 60 years. 相似文献