Content and Composition of Hydrocarbons in Water and Sediments in the Area of Kerch Strait     

Nemirovskaya  I. A.  Zavyalov  P. O.  Konovalov  B. V.  Khramtsova  A. V. 《Doklady Earth Sciences》2020,492(1):387-391

Doklady Earth Sciences - The results of studying the content and composition of aliphatic hydrocarbons (AHCs) and polycyclic aromatic hydrocarbons (PAHs) in the suspended particulate matter of the...  相似文献   

Clay Minerals in Basalt Sills from the Sediment Cover,East Pacific Rise     

V. B. Kurnosov  B. A. Sakharov  A. R. Geptner  Yu. I. Konovalov  E. O. Goncharov 《Lithology and Mineral Resources》2020,55(2):152-163

Clay minerals in basalt sills from the northern East Pacific Rise, covered by Upper Pleistocene clayey–sandy–silty sediments (turbidites, hemipelagites, and diatom oozes) sampled from DSDP Holes 477, 478, and 481A, were studied by X-ray methods based on the modeling of diffraction patterns. Trioctahedral smectites formed in thin (0.1–0.5 and 1.8–4 m) fissured sills that are well permeable for water delivered from the water-saturated host sediments heated by the sills. Smectites in basalts are found in the interstices (20–40 vol % in the rock and up to 50–80 vol % in hyalobasalts). They replace olivine and fill cracks and vesicles. Plagioclase and clinopyroxene are generally unaltered. The structure of smectites is characterized by different height of layers depending on the composition of cations in the interlayers and the degree of their hydration. The different-height layers either make up individual smectite phases or alternate in different proportions and with a high degree of segregation in the mixed-layer structures. Under conditions of a prolonged cooling, thick (43 m) sills are distinguished from the thin varieties by the formation of trioctahedral minerals (smectite–chlorite, chlorite, defective chlorite, and talc). They are found mainly in the interstices that make up 3–7 vol % of the rock.  相似文献   

The Strong Earthquake in Sakhalin Island in September 13, 2020     

Konovalov  A. V.  Khanchuk  A. I.  Stepnov  A. A.  Stepnova  Yu. A. 《Doklady Earth Sciences》2021,497(1):242-245

Doklady Earth Sciences - The seismotectonic position of the strong earthquake that occurred in the southern part of Sakhalin Island on September 13, 2020, is considered. The maximum shaking...  相似文献   

Oxygen and Sulfides in Bottom Sediments of the Coastal Sevastopol Region of Crimea     

N. A. Orekhova  S. K. Konovalov 《Oceanology》2018,58(5):679-688

Spatial variations in the distribution and fluxes of dissolved oxygen and sulfide in bottom sediments of Omega and Sevastopol bays have been studied. The results of analysis reveal that the distribution of dissolved oxygen and sulfide in pore water depends mostly on seasonal variations in the oxygen concentration in bottom water, grain size, the organic carbon content in bottom sediments, and, additionally for Sevastopol Bay, the iron content. The oxygen flux at the bottom of Sevastopol Bay is 20 times larger in winter–spring compared to that of Omega Bay. Anaerobic conditions in Sevastopol Bay sediments are observed much closer to the surface, with their subsequent development in bottom water.  相似文献   

Numerical modelling of tsunami propagation in the open Black Sea     

S. F. Dotsenko  A. V. Konovalov 《Physical Oceanography》1996,7(1):65-77

This paper focuses on the numerical modelling of tsunami propagation in the open Black Sea. Two types of numerical models are discussed: a model for the radial propagation of long waves and an evolutionary finite-difference prognostic model. Experimentally derived numerical data on the model source of tsunamis are reported. Translated by Vladimir A. Puchkin.  相似文献   

The mixing efficiency and the processes of restratification in a stably stratified medium     

V. S. Maderich  O. M. Konovalov  S. I. Konstantinov 《Physical Oceanography》1994,5(1):21-26

The mechanism of the effect of a collapsing turbulent eddy on diapycnal transport in a stably stratified fluid is considered. It is shown that at small Richardson turbulent numbersRi ₀ the mixing efficiency increases asRi ₀, and at large numbers it decreases in proportion toRi ₀ ^–1/2 .Translated by Mikhail M. Trufanov. UDK 551.465.15.  相似文献   

Weakly non-linear free oscillations in a basin of variable depth     

A. V. Konovalov  Yu. V. Manilyuk  L. V. Cherkesov 《Physical Oceanography》1992,3(2):87-94

Weakly non-linear free oscillations in a basin of variable depth filled with non-viscous fluid are investigated in terms of the long waves theory using the perturbation technique. Solutions to the initial two approximations for the horizontal velocity component and free surface departure are numerically derived. An attempt is made to determine the area of applicability of the linear theory by applying a parabolic bottom profile to the basin.Translated by V. Puchkin.  相似文献   

First Data about Mercury in Modern Hydrothermal Process in the Ocean,Juan de Fuca Ridge     

Yu. I. Konovalov  L. N. Luchsheva  V. B. Kurnosov 《Doklady Earth Sciences》2018,480(1):575-579

The results of studying Hg in an underwater hydrothermal system in the ocean using the Middle Valley of the Juan de Fuca ridge as an example are presented. A significant part of Hg is accumulated in the basalt fundament (Holes 858F, G), forming anomalously high concentrations (up to 29.30 ppm) in certain parts. The high Hg contents were established in metalliferous sediments (323 ppm) of the sedimentary cover (Hole 858D) and in sulfide deposits (up to 10.30 ppm). In other parts of the section, Hg content is 0.02–0.76 ppm (Holes 858B, D, F), background Hg contents in sediments—0.08–0.28 ppm and in basalts—0.17–0.31 ppm (Holes 855A, C, D).  相似文献   

The largest recent earthquake in the Upper Amur region on October 14, 2011: First results of multidisciplinary study     

A. I. Khanchuk  D. A. Safonov  Ya. B. Radziminovich  N. S. Kovalenko  A. V. Konovalov  N. V. Shestakov  V. G. Bykov  M. A. Serov  A. A. Sorokin 《Doklady Earth Sciences》2012,445(1):916-919

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Analysis of state of the carbonate system of waters and variations of the content of organic carbon in bottom sediments of the Sevastopol bay in 1998–2005     

O. G. Ignat’eva  E. I. Ovsyanyi  A. S. Romanov  S. K. Konovalov  N. A. Orekhova 《Physical Oceanography》2008,18(2):96-105

On the basis of the experimental data accumulated in 1998–2005, we analyzed the space and time variations of the carbonate system of waters and the content of organic carbon in bottom sediments of the Sevastopol Bay. The intensity of gas exchange through the water-atmosphere interface was quantitatively estimated. It was shown that the partial pressure of carbon dioxide pCO₂ in waters of the bay became much higher for the period of observations. The maximum changes were observed in summer. They were especially pronounced for the bottom layer of waters. For the entire period of observations, the invasion of carbon dioxide CO₂ was predominant in the major part of the bay, and the content of organic carbon in the bottom sediments increased. The ability of waters in the bay to absorb CO₂ is explained by the synthesis of organic substances, which becomes possible due to the presence of the equivalent load of nutrients. __________ Translated from Morskoi Gidrofizicheskii Zhurnal, No. 2, pp. 57–67, March–April, 2008.  相似文献