Effect of a Flood in the Amur River on Organic Matter Dynamics in Groundwater     

L. M. Kondrat’eva  D. V. Andreeva 《Water Resources》2018,45(6):887-896

The space and time dynamics of organic matter concentration in groundwater in the Tungusskoe deposit during the historical 2013 flood in the Amur River is discussed. For comparison analysis, several methods for determining the quantitative characteristics of organic matter (spectrophotometry, gas-chromatographic mass spectrometry, and high-performance liquid chromatography) were applied to different layers of an aquifer at different distances from the shore line. The genesis of many organic substances is due to the inflow of river filtrate and surface water from the inundated floodplain. In the post-flood 2014, groundwater showed a decrease in the total amount of organic components and the presence of low-molecular hydrocarbons, diphenylamine, cosanes, phenanthrene, naphthalene, and derivatives of stearic and palmitic acids. Toxic methyl benzene was identified in most wells.  相似文献   

Conditions of the formation and composition of noritic magmas of the Kivakka intrusion,north Karelia: Evidence from melt inclusion study     

O. A. Andreeva  V. B. Naumov  I. A. Andreeva  N. N. Kononkova 《Geochemistry International》2010,48(2):187-193

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In memoriam Vyacheslav Ivanovich Kovalenko     

I. A. Andreeva  V. S. Antipin  O. A. Bogatikov  M. V. Borisov  N. S. Bortnikov  N. V. Vladykin  V. L. Vinograd  A. V. Girnis  V. A. Glebovitskii  L. V. Danyushevsky  N. L. Dobretsov  V. S. Kamenetsky  L. T. Kogarenko  A. M. Kozlovskyi  S. P. Korikovsky  A. B. Kotov  M. G. Kopylova  M. I. Kuz’min  N. N. Laverov  F. A. Letnikov  B. A. Litvinovsky  A. A. Marakushev  M. A. Nazarov  V. B. Naumov  A. V. Nikiforov  I. S. Puchtel  Yu. M. Pushcharovsky  S. V. Ruzhentsev  I. D. Ryabchikov  V. S. Samoilov  A. V. Samsonov  A. G. Simakin  A. V. Sobolev  A. I. Khanchuk  N. P. Yushkin  V. V. Yarmolyuk 《Petrology》2011,19(4):325-326

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Validation of the WAMC4 wave model for the Black Sea     

Z. Cherneva  N. Andreeva  P. Pilar  N. Valchev  P. Petrova  C. Guedes Soares 《Coastal Engineering》2008

The present paper describes the set-up and application of the third-generation wave model — WAM Cycle 4 to the Black Sea. The wind fields are calculated by a regional atmosphere model (REMO), which was driven with the conditions from the global NCEP re-analysis project. These atmospheric data are used to force the state-of-the-art WAM model. The validation is done by comparison of wave model output against directional buoy measurements registered at three deep-water locations and wave gauge data taken at a point in intermediate depth near the Black Sea coast. The results reveal that agreement between modeled and measured data is satisfactory and the quality of the simulations increases under more energetic and severer wind and wave conditions. Following the validation, a 41-year wave hindcast was implemented spanning the period 1958–1998.  相似文献   

Variations in the subsidence of buried soils in cyclic loess in the Northern Eurasia Region     

V. T. Trofimov  S. D. Balykova  T. V. Andreeva  A. V. Ershova 《Moscow University Geology Bulletin》2012,67(4):247-252

The subsidence of buried soils in cyclic loess sequences in the Northern Eurasia Region was described. Two types of variations in the relative subsidence of the buried soils were established. The relationships between the subsidence indexes of buried soils, over- and underlying loess were studied.  相似文献   

Mineralogy and ore formation conditions of the Bugdaya Au-Bearing W-Mo porphyry deposit, Eastern Transbaikal Region, Russia     

V. A. Kovalenker  G. D. Kiseleva  T. L. Krylova  O. V. Andreeva 《Geology of Ore Deposits》2011,53(2):93-125

The Bugdaya Au-bearing W-Mo porphyry deposit, Eastern Transbaikal Region, Russia, is located in the central part of volcanic dome and hosted in the large Variscan granitic pluton. In its characteristics, this is a Climax-type deposit, or an Mo porphyry deposit of rhyolitic subclass. The enrichment in gold is related to the relatively widespread vein and veinlet gold-base-metal mineralization. More than 70 minerals (native metals, sulfides, sulfosalts, tellurides, oxides, molybdates, wolframates, carbonates, and sulfates) have been identified in stockwork and vein ores, including dzhalindite, greenockite, Mo-bearing stolzite, Ag and Au amalgams, stromeyerite, cervelleite, and berryite identified here for the first time. Four stages of mineral formation are recognized. The earliest preore stage in form of potassic alteration and intense silicification developed after emplacement of subvolcanic rhyolite (granite) porphyry stock. The stockwork and vein W-Mo mineralization of the quartz-molybdenite stage was the next. Sericite alteration, pyritization, and the subsequent quartz-sulfide veins and veinlets with native gold, base-metal sulfides, and various Ag-Cu-Pb-Bi-Sb sulfosalts of the gold-base-metal stage were formed after the rearrangement of regional pattern of tectonic deformation. The hydrothermal process was completed by argillic (kaolinite-smectite) assemblage of the postore stage. The fluid inclusion study (microthermometry and Raman spectroscopy) allowed us to establish that the stockwork W-Mo mineralization was formed at 550–380°C from both the highly concentrated Mg-Na chloride solution (brine) and the low-density gas with significant N2 and H2S contents. The Pb-Zn vein ore of the gold-base-metal stage enriched in Au, Ag, Bi, and other rare metals was deposited at 360–140°C from a homogeneous Na-K chloride (hydrocarbonate, sulfate) hydrothermal solution of medium salinity.  相似文献   

Prominence activity during the ascending phase of solar cycle 22     

V. N. Dermendjiev  K. Y. Stavrev  P. L. Andreeva 《Solar physics》1992,138(2):415-418

Longitude-latitude and time-latitude distributions of the number and area of prominences observed at Lomnický Stit coronal station in the years 1986–1990 are studied using the method of contour maps construction with different degree of smoothing. Special attention is paid to the bifurcation in the prominence distribution. Comparison with the ascending phase of solar cycle 21 is made.  相似文献   

Macroseismic manifestations of the Okhotsk earthquake of May 24, 2013 in the territory of Moscow     

E. A. Rogozhin  A. D. Zavyalov  N. V. Andreeva 《Seismic Instruments》2014,50(4):278-289

The results of a study of the macroseismic effects in the territory of Moscow of a remote deepfocus earthquake that occurred on May 24, 2013 in the Sea of Okhotsk are reported. On the surface of the earth and on the first floors of the buildings the seismic effect was not felt. The effect of the shock began to manifest itself at levels higher than the fifth floor of the buildings. The distribution of points on the map where the earthquake was felt is non-uniform. Points where tremor was felt do not appear to correspond with certain types of Quaternary deposits or with zones of different depth. There is also no significant correlation of the parts of the surface with high intensities of tremor and areas of ground-water flooding. Comparison between the surface manifestations of the seismic event and the tectonic features and deep structure of the metropolis was made. Based on the results of the implemented statistical estimation of distribution points where the earthquake was felt on the territory of the city it is visible that fault zones govern the largest number of points, while block structures characterize almost half of them. Thus, we can reasonably suggest a certain macroseismic increase of vibrations from earthquakes in the areas of large faults in the city. The study of deformations of the asphalt cover of walkways on the landslide-affected slope of Vorobyovy Hills showed that the tremor caused by the Okhotsk deep focus earthquake of May 24, 2013, caused the activation of a small landslide at all levels of the hillside.  相似文献   

Paleomagnetic data on the sedimentation rate near the Mendeleev Rise (Arctic Ocean)     

A. L. Piskarev  I. A. Andreeva  E. G. Gus’kova 《Oceanology》2013,53(5):620-629

Seven cores of bottom sediments were collected during the cruise of R/V Akademik Fedorov in 2000 along the latitudinal profile crossing the Mendeleev Rise near 82° N, and then studied. The length of cores varies from 240 to 334 cm. In all cores, the boundary of the changing remanent magnetization vector corresponding to the Brunhes-Matuyama boundary was established reliably. In five cores, this boundary is at a depth of 86–102 cm; in two cores, collected to the west of the Mendeleev Rise, at depth levels of 188 and 208 cm. The correlation of paleomagnetic and lithological data demonstrates that the upper boundary of a bench of speckled pelites, overlapped by a bench of variegated pelites, is confined to the Olduvai episode or horizons lying slightly below. The average sedimentation rate of sediments from the Mendeleev Rise during the last 2–2.5 Ma have not exceeded 1–1.3 mm/ka, increasing towards the shelf seas of northeast Russia.  相似文献   

Tectono-Magmatic Cycles and Geodynamic Settings of Ore-Bearing System Formation in the Southern Cis-Argun Region     

V. A. Petrov  O. V. Andreeva  V. V. Poluektov  D. V. Kovalenko 《Geology of Ore Deposits》2017,59(6):431-452

The ore-bearing geological structural units of the southern Cis-Argun region are considered in the context of varying geodynamic regimes related to the Proterozoic, Caledonian, and Hercynian tectono-magmatic cycles, as well as during the Late Mesozoic within-plate tectono-magmatic activity, which give rise to the formation of subalkaline igneous rocks of the Shakhtama Complex with Au, Cu–Mo, Pb–Zn–Ag metallogenic specialization; volcano-plutonic complexes of calderas with Mo–U, Pb–Zn, and fluorite ores; and rare-metal granite of the Kukulbei Complex with a Sn–W–Li–Ta spectrum of mineralization. The comparative geochemical characteristics inherent to Mesozoic ore-bearing felsic igneous rocks are considered, as well as geodynamic settings of ore-bearing fluido-magmatic systems, taking into consideration new data on geochemistry of bimodal trachybasalt–trachydacite series and rhyolite of the Turga Series, which fill the Strel’tsovka Caldera, whose trend of evolution is defined as a reference for geological history of the studied territory. The geodynamic conditions, phase composition, and geochemistry of rocks along with metallogenic specialization of Mesozoic volcano-plutonic complexes of southern Cis-Argun region are close to those of the Great Khingan Belt in northeastern China and eastern Mongolia.  相似文献