Doppler mapping of the SS Cyg system during outburst     

D. Boneva  P. V. Kaigorodov  D. V. Bisikalo  D. A. Kononov 《Astronomy Reports》2009,53(11):1004-1012

Spectral observations of the SS Cyg system in its active state are used to construct Hβ and Hγ Doppler tomograms. These are compared with analogous tomograms for the quiescent state and synthetic tomograms derived from the results of three-dimensional gas-dynamical modeling. The parameters of the accretion disk during the outburst are estimated. An explanation for the observed flow pattern is proposed, based on a numerical model with an elliptical accretion disk.  相似文献   

Plate tectonics of the northern part of the Pacific Ocean     

E. V. Verzhbitsky  M. V. Kononov  V. D. Kotelkin 《Oceanology》2007,47(5):705-717

Geophysical data on the northern part of the Pacific Ocean were systematized to compile a map of geomagnetic and geothermal studies of the Bering Sea. The absence of reliable data about the formation time of the Bering Sea structures of oceanic and continental origins is noted; this hampered the assessment of the geodynamical processes in the North Pacific. Based on the geophysical data, we estimated the age of the structures of the Bering Sea floor such as the Commander Basin (21 My), the Shirshov Ridge (95 and 33 My in the northern and southern parts, respectively), the Aleutian Basin (70 My), the Vitus Arch (44 My), the Bowers Ridge (30 My), and the Bowers Basin (40 My). These values are confirmed by the geological, geophysical, and kinematic data. A numerical modeling of the formation of extensive regional structures (Emperor Fracture Zone, Chinook Trough, and others) in the Northern Pacific is carried out. A conclusion was made on the basis of the geological and geothermal analysis that the northern and southern parts of the Shirshov Ridge have different geological ages and different tectonic structures. The northern part of the ridge is characterized by an upthrust-nappe terrain origin, while the southern part has originated from a torn-away island arc similar to the origin of the Bowers Ridge. The sea floor of the Aleutian Basin represents a detached part of the Upper Cretaceous Kula plate, on which spreading processes took place in the Vitus Arch area in the Eocene. The final activity phase in the Bering Sea began 21 My B.P. by spreading of the ancient oceanic floor of the Commander Basin. Based on the age estimations of the structures of the Bering Sea floor, the results of the modeling of the process of formation of regional fracture zones and of the geomagnetic, geothermal, tectonic, geological, and structural data, we calculated and compiled a kinematic model (with respect to a hot spot reference system) of the northern part of the Pacific Ocean for 21 My B.P.  相似文献   

Geodynamic Causes of the Emergence and Termination of Cenozoic Shear Deformations in the Khatanga–Lomonosov Fault Zone (Arctic)     

Lobkovsky  L. I.  Kononov  M. V.  Shipilov  E. V. 《Doklady Earth Sciences》2020,492(1):356-360

Doklady Earth Sciences - In the context of models of mantle circulation beneath the continent, coupled with the subduction of the oceanic lithosphere, a direct link between the kinematics of plate...  相似文献   

Geodynamics and plume tectonics of the Azore-Gibraltar fault zone (North Atlantic)     

E. V. Verzhbitsky  M. V. Kononov  A. F. Byakov  O. V. Grinberg 《Oceanology》2011,51(5):876-890

Maps of the principal structures and geological-geophysical knowledge for the Azores-Gibraltar and Icelandic regions have been made. The geodynamic conditions of the Azores archipelago formation have been analyzed. It has been noted that the uplifting of the Azores plume (as well as the Icelandic one) might have been triggered by near-surface tectonic processes. The computer modeling has been performed with respect to the coefficients of the geodynamic sinking rates for the Azores fragment of the Mid-Atlantic Ridge. Based on the modeling results, this rate was ∼1.5 times higher than the average sinking rate for the mid-ocean ridges of the World Ocean in general. The high sinking rate of the Azores fragment is caused by the influence of the plume material on the sinking process. Based on the complex analysis of the seismicity, thermal flow, and seismic tomography data distribution, as well as the implemented numerical calculations, the European (northern) part of the diffuse boundary between the Eurasian and African plates has been identified for the first time. Along with the African (southern) boundary, it outlines the identified by the authors West Mediterranean plate.  相似文献   

Thermodynamic Properties of Natural Cuspidine     

L. P. Ogorodova  M. F. Vigasina  O. V. Kononov  N. N. Koshlyakova  D. A. Ksenofontov  D. A. Khanin  V. D. Shcherbakov  L. V. Mel’chakova 《Geochemistry International》2018,56(8):865-869

The paper reports pioneering data on the calorimetrically determined enthalpy of formation from elements of cuspidine, Ca fluordiorthosilicate Ca₄Si₂O₇F₂, from the Tyrny-Auz Mo–W deposit in Kabardino- Balkaria, Russia. The data were obtained by high-temperature melt solution calorimetry. The determined value is ΔfH_el° (298.15 K) =–5190 ± 13 kJ/mol. The paper reports estimated S°(298.15 K) and Δ_fG_el° (298.15 K) of cuspidine.  相似文献   

Nucleosynthesis of elements: S-process     

V. S. Shorin  V. M. Gribunin  V. N. Kononov  I. I. Sidorova 《Astrophysics》1971,7(3):286-293

  相似文献   

Development of the steppe zone in southern Russia based on the reconstruction from the loess-soil formation in the Don-Azov Region   总被引：2，自引：0，他引：2  

A. Velichko  T. D. Morozova  O. K. Borisova  S. N. Timireva  V. V. Semenov  Yu. M. Kononov  V. V. Titov  A. S. Tesakov  E.. Konstantinov  R. N. Kurbanov 《Doklady Earth Sciences》2012,445(2):999-1002

Herbaceous communities in forest ecosystems on the southern part of the Russian Plain appeared in the Middle Miocene (??10 Ma BP). In the Late Miocene (??7 Ma BP), feather-grass steppe associations appeared among them. In the time span of 2.7 to 2.1 Ma BP (i.e., in the Early Quaternary, according to the current chronostratigraphic scale), the steppe zone arose on the southern Russian Plain in the Don-Azov Region. Seven stages of this zone development here have been distinguished throughout the Quaternary. The first one (Eopleistocene-Early Pleistocene) was characterized by savanna-like subtropic ecosystems. Then, in the Middle Pleistocene, the temperate zone ecosystems (tallgrass prairie-like steppes) developed here and were followed by steppe ecosystems close to the modern ones in Central Europe. The ecosystems of rich-species forb steppes developed in the Late Pleistocene. Finally, in the optimum of the modern interglacial (Holocene), steppes became similar to the modern ones here, but with a slightly higher precipitation. The general trend is characterized by reduction in heat and water provision and increase in aridization progressing from earlier to later stages.  相似文献   

A possible explanation of non-steady-state appearances in X-ray spectra of solar flares     

K. N. Koshelev  E. Ya. Kononov 《Solar physics》1982,77(1-2):177-181

A model of essentially transient ionization of plasma is suggested to explain some features in observed spectra of solar flares, which cannot be understood if stationary conditions are assumed.  相似文献   

Gases of Icelandic hydrothermae     

S. A. Arnorsson  V. I. Kononov  B. G. Polak 《Bulletin of Volcanology》1975,39(1):2-14

The main hydrochemical types of Icelandic hydrothermae are recognized as well as the reguliarities in their distribution. Nitrogenous thermae are spread mainly in the areas of Pre-Quaternary flood-basalts; carbon-dioxide thermae are peculiar of the volcanic zone of Snaefellsnes peninsula, whereas nitrogenous-carbon-dioxide thermae are characteristic of the areas of Pre-Holocene volcanic activity in the Median neovolcanic zone and some adjacent areas. The special hydrochemical feature of the axial parts of Median neovolcanic zone is the presence of high-temperature hydrothermal systems with great amount of H₂ in the gas composition. Hydrogenous thermae of Iceland are considered to be a specific genetic type of hydrothermae, being formed in the zones of mid-oceanic ridges. The origin of H₂ is discussed.  相似文献   

Geothermal Resources of Russia and Their Utilization     

Kononov  V. I. 《Lithology and Mineral Resources》2002,37(2):97-106

The study of the Earth's thermal field testifies to the presence of a huge, practically inexhaustible and ecologically pure source of thermal energy in the interior. These geothermal resources are subdivided into petrothermal and hydrothermal varieties representing thermal energy accumulated in rocks and groundwater fluids, respectively. Extraction of thermal energy from hard rocks is as yet at the stage of experiment, whereas the hydrothermal resources are already successfully exploited in many countries supplying electrical and thermal energy. In Russia, geothermal resources are predominantly utilized for space heating in several cities and settlements of the Northern Caucasus and Kamchatka with a total population of 500000. Besides, greenhouses with a total area of 465000 m² use terrestrial heat in some regions of Russia. The electricity is generated by some geothermal power plants (GeoPP) only in the Kamchatka Peninsula and Kuril Islands. At the present time, the Pauzhetka GeoPP (installed capacity 11 MW_e) and Severo-Mutnovka GeoPP (12 MW) are in operation in Kamchatka. Near the latter power plant, the unit (50 MW) was constructed in 2001 and will come into operation in 2002. Moreover, another GeoPP (100 MW) is now in project in the same place. Two small GeoPP are in operation in the Kurils (Kunashir and Iturup islands) with installed capacity of 2.6 and 6 MW, respectively.  相似文献