Bottom bituminous constructions and biota inhabiting them according to investigation of Lake Baikal with the Mir submersible     

O. M. Khlystov  T. I. Zemskaya  T. Ya. Sitnikova  I. V. Mekhanikova  I. A. Kaigorodova  A. G. Gorshkov  O. A. Timoshkin  O. V. Shubenkova  S. M. Chernitsyna  A. V. Lomakina  A. V. Likhoshvai  A. M. Sagalevich  V. I. Moskvin  V. I. Peresypkin  N. A. Belyaev  M. V. Slipenchuk  A. K. Tulokhonov  M. A. Grachev 《Doklady Earth Sciences》2009,429(1):1333-1336

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Problems in determining spatial inhomogeneity of <Superscript>137</Superscript>Cs fallout for estimating rates of erosion-accumulative processes     

V. N. Golosov  M. V. Markelov  V. R. Belyaev  O. M. Zhukova 《Russian Meteorology and Hydrology》2008,33(4):217-227

The issues of assessing variability of ¹³⁷Cs fallout of global and Chernobyl origin at reference sites are discussed with a purpose to use this isotope as a tracer for estimating the rates of erosion-accumulative processes. It is shown that local variability of soil contamination by ¹³⁷Cs at reference sites is within 7–20%, which makes it possible to use the isotope as a tracer. When studies are conducted within drainage basins, the available trend of the atmospheric ¹³⁷Cs fallout should be taken into account in assessing the soil and sedimentation redistribution.  相似文献   

The organic carbon in the water,the particulate matter,and the upper layer of the bottom sediments of the west Kara Sea     

N. A. Belyaev  V. I. Peresypkin  M. S. Ponyaev 《Oceanology》2010,50(5):706-715

In three sections in the Kara Sea, the contents of the dissolved and particulate organic carbon (the DOC and POC, respectively), as well as of the organic carbon of the bottom sediments (C_org) were determined. The contents of varied from 6.3 to 2400 μg/l for the DOC and from 0.84 to 12.2 mg of C/l for the POC. The average concentrations for all the samples tested amounted to 200 μg/l for the DOC (n = 78, σ = 368) and 2.7 mg/l for the POC (n = 92, σ = 2.7). The concentrations of Corg in the samples of the upper layer of the bottom sediments of the area treated varied from 0.13 to 2.10% of the dry substance at an average value of 0.9% (n = 21, σ= 0.49%). It is shown that the distribution of the different forms of organic matter (OM) is an indicator of the supply and spreading of the particulate matter in the Kara Sea and that the DOC and POC of the Kara Sea are formed under the impact of the runoff of the Ob and Yenisei river waters. It is found that the distribution of the OM of the bottom sediments in the surveyed area of the Kara Sea is closely related to their grain-size composition and to the structure of the currents in the area studied. The variations in the Corg content in the bottom sediment cores from the zone of riverine and marine water mixing represent the variability of the OM burial.  相似文献   

The Molecular Composition of Lignin as an Indicator of Subaqueous Permafrost Thawing     

Ulyantsev  A. S.  Belyaev  N. A.  Bratskaya  S. Yu.  Romankevich  E. A. 《Doklady Earth Sciences》2018,482(2):1357-1361

The concentration and molecular composition of phenols, lignin derivatives, were analyzed. The material for the study was sampled from bottom sediments and subaqueous perennial frozen rocks from a well drilled in the Buor-Khaya Gulf of the Laptev Sea. The analysis was undertaken on the basis of calculation of the molecular factor. The principal difference in the molecular composition of organic matter is shown. This difference is manifested in the decrease in the total concentration of the vanillic lignin derivatives in the thawed formations in comparison with the perennial frozen rocks. This phenomenon is explained by activation of the bacterial transformation of organic matter caused by thawing of the subaqueous permafrost. It was established that the weight percentage of lignin in the organic matter of the analyzed sediments is 17% C_org.

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The polygenous nature of the Patyn ore—magmatic cluster (Mountainous Shoriya)     

E. V. Belyaev 《Doklady Earth Sciences》2010,435(1):1420-1422

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The formation of ultradeep sedimentary basins through metamorphism with rock contraction in continental crust     

E. V. Artyushkov  I. V. Belyaev  G. S. Kazanin  S. P. Pavlov  P. A. Chekhovich  S. I. Shkarubo 《Doklady Earth Sciences》2013,452(2):988-991

Sedimentary covers are up to 15–20 km thick in ultradeep sedimentary basins. Joint interpretation of seismic reflection sounding and gravimetric data indicates that eclogites are located in the basins under the Moho. In these rocks the velocities of P-waves are close to those in mantle peridotites. The basins show only moderate crustal stretching and their formation was caused primarily by the transformation of gabbroids into dense eclogites in the lower part of the continental crust. The transformation took place episodically as mantle fluids infiltrated the lower crust and it was ensured by pressure rise in the lower crust occurring with the accumulation of sediments. Moderate metamorphism developed in silicic upper crust as temperature and pressure increased under thick sedimentary covers. In iron-rich metasedimentary rocks, deep metamorphism resulted in the density increase, and P-wave velocities there increased to those characteristic of the oceanic crust.  相似文献   

Self-potential anomalies in Cerro de Pasco and Hualgayoc areas (Peru) revisited     

D.S. Vagshal  S.D. Belyaev 《Geophysical Prospecting》2001,49(1):151-154

Self-potential anomalies with unexplained high values have been observed in various places. Such anomalies were reported in Peru more than 30 years ago. An explanation is proposed based on the electrokinetic effect obtained when a topographic high occurs above a rock layer through which water filtrates and which itself lies over a highly resistive layer. In such a case a fairly high self-potential may occur. Conversely, when one of these conditions is not met, the self-potential anomaly at the earth's surface resulting from the electrokinetic effect is strongly attenuated.  相似文献   

Chlorophyll, primary production, fluxes, and balance of organic carbon in the Laptev Sea     

A. A. Vetrov  E. A. Romankevich  N. A. Belyaev 《Geochemistry International》2008,46(10):1055-1063

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Lignin as an indicator of the sedimentation conditions on the Arctic shelf     

A. S. Ulyantsev  E. A. Romankevich  V. I. Peresypkin  N. A. Belyaev  I. P. Semiletov  S. Yu. Bratskaya  A. A. Vetrov  V. I. Sergienko 《Doklady Earth Sciences》2016,467(1):264-269

It is shown for the first time that the proportion of lignin in shelf deposits may range from 1/3 to the total concentration of organic carbon. The distribution of wood residues and lignin in the studied sedimentary formation is very uneven, which reflects the dynamic flux environment of sedimentation and OM supply. The calculated molecular indexes showed that most of the OM in deposits underwent insignificant diagenetic alterations.  相似文献   

Some experience in unraveling geochemical earthquake precursors     

V. L. Barsukov  V. S. Serebrennikov  A. A. Belyaev  Yu. A. Bakaldin  R. V. Arsenyeva 《Pure and Applied Geophysics》1984,122(2-4):157-163

The discrimination of significant earthquake precursors from background noise is treated as a multistep problem of pattern recognition. Statistical characteristics of helium-content recorded in short time intervals are used as informative parameters. The set of calculated characteristics includes estimations of the mean, the variance, and the results of spectral analysis of the investigated time series. The selection of significant parameters and the rigorous estimations of time shifts between geochemical and seismic series are carried out by analyzing their cross-covariance function. It is established that the most informative characteristics of a hydrothermal system are related to the dynamic fluctuations of the geochemical parameters. The final phase of prediction is based on the application of a method of statistical discovery of images. A method of earthquake-time prediction is suggested. By using this method, we may determine the 10-day interval during which an earthquake may occur two months in advance. The prediction may be improved by increasing the frequency of sampling and by improving the precision of analytical measurements, both of which can be achieved by automation of monitoring devices. Deployment of uniform monitoring networks is needed in regions designated for special prediction tasks.  相似文献