Optimization of the transfer trajectory of a low-thrust spacecraft for research of Jupiter using an Earth gravity-assist maneuver   总被引：1，自引：0，他引：1  

M. S. Konstantinov  A. A. Orlov 《Solar System Research》2014,48(7):606-612

The paper analyzes the possibility of the use of a gravity-assist maneuver for flight to Jupiter. The advantage of the Earth gravity-assist maneuver in comparison with the direct transfer in terms of reduction of amount of energy required per transfer is considered. Quantitative and qualitative evaluations of two transfer profiles are given.  相似文献   

Basites of the Vilyui paleorift: geochemistry and sequence of intrusive events     

M.D. Tomshin  A.G. Kopylova  K.M. Konstantinov  S.S. Gogoleva 《Russian Geology and Geophysics》2018,59(10):1204-1216

We present results of study of the basites of the Vilyui paleorift. Their ⁴⁰Ar/³⁹Ar isotopic ages were used to establish the sequence of their intrusion, which lasted ~ 18 Myr. Dolerite sills of the Kontai-Dzherba zone were the first crystallizing phase (378.0-380.7 Ma), which was followed by the intrusion of dikes of the Vilyui-Markha zone (372-373 Ma). Dikes of the Chara-Sinsk zone were the last crystalizing phase (362-364 Ma). The prolonged plume-lithosphere interaction resulted in the successive enrichment of basaltic melt with titanium, phosphorus, REE, HSFE, and LILE. Accumulation of the melt and formation of a magmatic lens at the crust-mantle boundary led to early crystallization of the melt at a depth of 35-40 km from the paleosurface under reducing conditions at a temperature of 1450-1470 °C. We assume that the inception and sequent opening of the Vilyui paleorift were associated with the relative rotation of 22° of the Angara-Anabar block with respect to the Aldan block in Early Famennian time. The Euler pole of rotation was located in the southern part of the paleorift, and a melting zone was directly beneath it.  相似文献   

Surface manifestations of internal waves observed using a land-based video system   总被引：1，自引：0，他引：1  

O. G. Konstantinov  V. V. Novotryasov 《Izvestiya Atmospheric and Oceanic Physics》2013,49(3):334-338

This paper presents the results of processing sea-surface optical images in the coastal zone of the Sea of Japan with manifestations of internal gravity waves (IGWs) in the region of the Gamov Peninsula and the results of an analysis of IGW field observations in the same region. The following parameters of IGWs have been determined from the results of processing: their lengths and phase velocities. We calculate the IGW parameters in the region of observations using a mathematical model that takes into account the field data on the vertical stratification of coastal waters and the nonlinearity of the wave process. A comparison of the IGW parameters obtained from model calculations with the parameters obtained from the processing of optical images demonstrates a good agreement between them.  相似文献   

Triassic stratigraphy of the Eastern Laptev Sea coast and New Siberian Islands     

A.G. Konstantinov  E.S. Sobolev  A.V. Yadrenkin 《Russian Geology and Geophysics》2013,54(8):792-807

Studies of the paleontology and stratigraphy of the Triassic strata from the Lena–Olenek interfluve area and Kotelny Island have important implications for improving the accuracy of interregional and global correlations, refining the Boreal standard and international stratigraphic scale for the Triassic System. The importance of this study is also underlined by the necessity of refining the stratigraphic basis for regional geological exploration in Arctic zone that now became the focus for building the country’s strategic resource base. Analysis of recent paleontological and stratigraphic data from key Triassic sections in the Laptev Sea coastal region provides new age constraints for the Triassic strata based on different faunal groups. The Triassic stratigraphic scheme for the region has been refined using new data on the paleontology, thickness variations, and boundaries of local stratigraphic subdivisions.  相似文献   

VEGETATION AS A CRITERION FOR INTERPRETING THE MOISTURE REGIME OF A LANDSCAPE     

S. M. Gorozhankina  V. D. Konstantinov 《地理信息系统科学与遥感》2013,50(3):199-211

Vegetation signatures on aerial photographs and space imagery are used as indicators of soil moisture differences in a Siberian taiga landscape. The authors use remote sensing products to identify all major habitat types resulting from variable soil moisture regimes that were observed on the ground. These types are described, as are their interpretation keys and the effects of scale change on habitat discrimination. Translated from: Kosmicheskiye metody izucheniya prirodnoy sredy Sibiri i Dal'nego Vostoka, Novosibirsk, 1983, pp. 63-74.  相似文献   

SOIL-GEOBOTANICAL REGIONALIZATION FROM REMOTE SENSING IMAGERY     

S. M. Gorozhankina  V. D. Konstantinov 《地理信息系统科学与遥感》2013,50(2):150-160

A multiscalar approach to mapping soil-vegetation regions from remote sensing imagery is outlined, using the West Siberian Lowland as a study area. At an initial stage small-scale space imagery is used to identify extensive soil-vegetation regions which extend across nearly the entire Lowland. Subsequent analysis focuses on identification and mapping of increasingly smaller units. The dominant criteria used for image interpretation and regionalization vary at each particular level of analysis, changing from vegetation structure and density at the smallest scales to soil “hydromorphism” (waterlogging) and topographic affiliations for intermediate- and large-scale units. Hydromorphic indicators are stressed as most important overall. Translated from: Distantsionnyye issledovaniya rel'yefa Sibiri, A. L. Yanshin and V. N. Sharapov, eds. Novosibirsk: Nauka, 1985, pp. 51-58.  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   

Isotope geochemical sequence of gold deposits in terrigenous successions     

M. M. Konstantinov  T. N. Kosovets 《Geochemistry International》2008,46(5):503-510

Based on the sulfur isotopic composition of sulfide minerals, gold deposits in terrigenous successions were systematized and grouped by variation ranges, intervals of modal values, and distribution of δ³⁴S. It was concluded that the evolution of the sulfur isotopic composition of deposits depends on the character of changes in sulfur isotopes in the host rocks of the continental crust.  相似文献   

Detailed biostratigraphy of Triassic deposits in the Lena lower reaches (northern Yakutia)     

A.G. Konstantinov  E.S. Sobolev  A.V. Yadrenkin 《Russian Geology and Geophysics》2007,48(9):721-736

Triassic sections of the Lena lower reaches (northern Yakutia) were studied. Stratigraphy and paleontology of the Triassic deposits were refined and described in detail, and their age was constrained by different fauna groups. The first detailed local Triassic biostratigraphic scheme is reported, which includes ammonoid, nautiloid, and bivalve zones and subzones and foraminifer beds. The scheme is compared with the Canadian Triassic Zonal and Standard (International) Scales.  相似文献   

Paleomagnetism of the trap intrusive bodies in arctic Siberia: Geological and methodical implications     

R. V. Veselovskiy  K. M. Konstantinov  A. V. Latyshev  A. M. Fetisova 《Izvestiya Physics of the Solid Earth》2012,48(9-10):738-750

New paleomagnetic data are reported for the dikes, sills, and lava flows in the Arctic part of the Siberian Platform, which has not been covered by previous systematical paleomagnetic investigations. The analysis of the newly obtained and previously published data provides important time constraints for the duration and character of evolution of the Permian-Triassic magmatic events in the studied regions. Our results once again illustrate the conclusion that, in order to obtain an exact estimate for the location of the paleomagnetic pole in the northern paleolatitudes, at least 30?C40 rapidly cooled magmatic bodies (dikes, flows, or minor sills) should be sampled if secular variation is commensurate with the intensity of the presentday variations.  相似文献