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51.
Lithologic-stratigraphic aspects of siliceous-clayey rocks forming the Khabarovsk terrane of the Jurassic accretionary prism were studied in western spurs of the Bol’shoi Khekhtsir Range on the left side of the Ussuri River (Ussuri-Khekhtsir section). Two defined types of the examined section differ in the composition, age, and origin of their constituting rocks. The northern segment of the section is composed of middle Bajocian red-brown siliceous-tuffaceous silty and olive-gray silty mudstones that accumulated in the hemipelagic domain under the influence of continental provenance. Its southern segment is represented by lower Bathonian olive-gray siliceous mudstones, mudstones barren of any admixtures, and yellowish brown tuffaceous mudstones deposited far away from the continent in waters with abundant radiolarians. It is shown that these rocks are elements of two tectono-stratigraphic complexes that reflect different stages in the accretionary prism formation. 相似文献
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Kabatchenko I. M. Kulikov E. A. Litvinenko G. I. Filippov Yu. G. 《Russian Meteorology and Hydrology》2020,45(1):39-44
Russian Meteorology and Hydrology - Possible extreme fluctuations of sea level in the area of the Akkuyu nuclear power plant induced by tsunami, wind, waves, and tides are discussed. The... 相似文献
54.
B. P. Filippov 《Astronomy Reports》2011,55(6):541-550
Some possibilities for the reconnection of magnetic-field lines of solar filaments that approach when the photospheric polarity
inversion lines change their positions, are discussed. The interaction between filaments depends on their internal properties,
which are determined by the filament chirality, or the sign of the helicity of the filament magnetic field. In quadrupolar
magnetic configurations, filaments with the same chirality can exchange their halves. Filaments with opposite chirality rupture
after the reconnection of the polarity inversion lines, since the two fragments of the different filaments cannot be connected
continuously. The morphology and connectivity of the filaments are analyzed using daily Hα filtergrams obtained over the period of maximum activity of the 23rd solar cycle. Examples of alterations of the filament
connectivity occuring during the evolution of photospheric fields are presented. 相似文献
55.
A. V. Maslov V. P. Shevchenko V. N. Podkovyrov Yu. L. Ronkin O. P. Lepikhina A. N. Novigatsky A. S. Filippov N. V. Shevchenko 《Lithology and Mineral Resources》2014,49(6):433-460
The paper discusses results of the lithogeochemical examination of recent bottom sediments in the lower course of the Severnaya Dvina River and White Sea. It has been established that the average concentration of several trace elements (Hf, Sc, Co, Y, Ni, V, Cr, Zr, Ba, and others) therein correlates with the content of the silt-pelite fraction. Maximal concentrations of the majority of above elements are confined to the silty-clayey sediments at the Basin/Dvina Bay boundary. They localized near the coastal zone only for some clastophile (Zr, Cr, and others). Typical values of the hydrolyzate module, chemical index of alteration, and Al2O3/SiO2 ratio in the aleuropelitic and pelitic sediments of the Severnaya Dvina River delta, Dvina Bay, and the Dvina Bay Basin boundary suggest that these sediments are confined to sufficiently cold climate settings. Data points of sediment composition in discriminant paleotectonic diagrams are scattered over a large field probably due to high contents of the weakly weathered plagioclases, micas, and amphiboles, as well as the hydrogenic process promoting the accumulation of Fe and Mn. The PAAS-normalized spectra of rare earth elements (REE) in bottom sediments of the Pinega and Severnaya Dvina rivers, marginal filter of the latter river, Dvina Bay, and the Dvina Bay Basin boundary are similar to the REE distribution in clayey rocks of the ancient platform cover (except for a slight positive Eu anomaly). The REE systematics and distribution pattern of compositional data points of recent bottom sediments in the GdN/YbN-Eu/Eu* and Eu/Eu*-Cr/Th diagrams and values of several indicator ratios of trace elements suggest that the studied rocks were formed by the mixing of clastic materials from geochemically contrast provenances: northwestern provenance (Kola-Karelia geoblock), which is mostly composed of the Archean and Early Proterozoic crystalline complexes, and the southeastern provenance (northwestern periphery of the Mezen syncline), which is almost totally composed of Phanerozoic sedimentary rocks. The latter provenance likely played a crucial role in the geochemical signature of recent bottom sediments over a significant area of the White Sea. 相似文献
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Short-lived plasma jets of various scales, from giant X-ray jets more than 300 Mm in extent to numerous small jets with sizes
typical of macrospicules, are the phenomena observed in the solar corona in extreme ultraviolet and X-ray emission. Small
jets are particularly prominent in polar coronal holes. They are close neighbors of tiny bright loops and coincide in time
with their sudden brightening and increase in size. The geometric shape of the jets and their location suggest that they arise
near singular null points of the coronal magnetic field. These points appear in coronal holes due to the emergence of small
bipolar or unipolar magnetic structures within large-scale unipolar cells. Polar jets show a distinct vertical plasma motion
in a coronal hole that introduces significant momentum and mass into the solar wind flow. Investigating the dynamics of polar
jets can elucidate certain details in the problem of fast solar wind acceleration. 相似文献
58.
Spatial–Temporal CO2 Variations near St. Petersburg Based on Satellite and Ground-Based Measurements
Timofeyev Yu. M. Berezin I. A. Virolainen Ya. A. Makarova M. V. Polyakov A. V. Poberovsky A. V. Filippov N. N. Foka S. Ch. 《Izvestiya Atmospheric and Oceanic Physics》2019,55(1):59-64
Izvestiya, Atmospheric and Oceanic Physics - The results of studying spatial–temporal CO2 variations near St. Petersburg in 2014–2017 based on satellite measurements (OCO-2 satellite)... 相似文献
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