Late Cretaceous-Paleogene Palynostratigraphy from the Arkhara-Boguchan Brown Coal Mine of Zeya-Bureya Depression, Russia   总被引：1，自引：1，他引：0  

Tatyana V. Kezina 《东北亚地学研究》2003,(2)

1IntroductionThe Arkhara-Boguchan brown coal mine is lo-cated in the western Arkhara depression,southeast-ern part of the Zea-Bureya Basin (Fig.1). Late Creta-ceous-Paleogene coal-bearing strata are well out-cropped at the Arkhara-Boguchan quarry. It contains four coal-bearing beds (in descending order): “Ve-likan”, “Promezhutochny”,“Dvoinoy”and “Nyzhny”, and composed of three sedimentary cycles (Fig.2). The lower cycle can be divided into two sub-cycles:the lowest sub-cycle is …  相似文献   

Authigenic rhodochrosite from a gas hydrate-bearing structure in Lake Baikal     

Krylov  Alexey A.  Hachikubo  Akihiro  Minami  Hirotsugu  Pogodaeva  Tatyana V.  Zemskaya  Tamara I.  Krzhizhanovskaya  Mariya G.  Poort  Jeffrey  Khlystov  Oleg M. 《International Journal of Earth Sciences》2018,107(6):2011-2022

International Journal of Earth Sciences - Early diagenetic carbonates are rare in Lake Baikal. Siderite (Fe carbonate) concretions in the sediments were discovered only recently. Here, we discuss...  相似文献   

Radiation-Geochemical Stability of Bottom Sediments in the Ob and Yenisei Estuaries and Adjacent Shoal Area of the Kara Sea     

Miroshnikov  A. Yu.  Flint  M. V.  Asadulin  En. E.  Komarov  Vl. B. 《Oceanology》2020,60(6):817-830

Oceanology - This paper reports the results of investigations on the radioecological state of bottom sediments of the Ob–Yenisei shoal area and Ob and Yenisei estuaries. Materials were...  相似文献   

Plumes and their influence on the formation of noble metal mineralization in carbonaceous rocks     

P. V. Komarov  I. N. Tomson 《Doklady Earth Sciences》2007,415(6):866-868

  相似文献   

Land use changes in the environs of Moscow   总被引：1，自引：0，他引：1  

Grigory Ioffe  & Tatyana Nefedova 《Area》2001,33(3):273-286

This paper focuses on several aspects of land use change in Russia during the 1990s with a particular focus on the environs of Moscow. These aspects include modes of farming, recreation, ownership of land, and concentric zones of outwardly declining land use intensity that resemble Von Thunen's economic landscape. These zones are given special attention. In contrast to other land use aspects, the analysis of which indeed reveals a fair amount of change bringing the environs of Russian cities one step closer to their Western counterparts, concentric agricultural land use patterns with outwardly declining productivity suggest continuity rather than change.  相似文献   

On the Use of Calibration Explosions at the Former Semipalatinsk Test Site for Compiling a Travel-time Model of the Crust and Upper Mantle     

N.N. Belyashova  V.I. Shacilov  N.N. Mikhailova  I.I. Komarov  Z.I. Sinyova  A.V. Belyashov  M.N. Malakhova 《Pure and Applied Geophysics》2001,158(1-2):193-209

—?Two chemical calibration explosions, conducted at the former Semipalatinsk nuclear test site in 1998 with charges of 25 tons and 100 tons TNT, have been used for developing travel-time curves and generalized one-dimensional velocity models of the crust and upper mantle of the platform region of Kazakhstan. The explosions were recorded by a number of digital seismic stations, located in Kazakhstan at distances ranging from 0 to 720?km. The travel-time tables developed in this paper cover the phases P, Pn, Pg, S, Sn, Lg in a range of 0–740?km and the velocity models apply to the crust down to 44?km depth and to the mantle down to 120?km. A comparison of the compiled travel-time tables with existing travel-time tables of CSE and IASPEI91 is presented.  相似文献   

Statistical estimates of fundamental constraints on the use of commercial CCD cameras in TV guide systems of large optical telescopes     

V. V. Komarov  A. F. Fomenko 《Astrophysical Bulletin》2007,62(1):90-104

The parameters of TV guide cameras of the BTA and Zeiss-1000 telescopes are analyzed. The formation of optical images by the “atmosphere + telescope” system is analyzed with allowance for the laws of photoelectron statistics in order to justify the applicability of commercial CCD cameras in the guiding systems of large optical telescopes. The analysis focuses on the estimates of fundamental constraints imposed on the method of TV observations of the sky through a turbulent atmosphere. The possible ways of reducing the main constraining factors in the case of the use of highly sensitive commercially produced CCDs in TV guide cameras are outlined.  相似文献   

Palynological evidence for Pennsylvanian (Late Carboniferous) vegetation change in the Sydney Coalfield,eastern Canada     

Tatyana K. Dimitrova  Erwin L. Zodrow  Christopher J. Cleal  Barry A. Thomas 《Geological Journal》2010,45(4):388-396

The palynology of clastic samples from seven stratigraphical levels in the late Moscovian Sydney Mines Formation, exposed along the shore at Bras d'Or, Nova Scotia, has been investigated. Most of the samples were from roof shales of major coals; the one sample that was not yielded a much higher proportion of pollen derived from extra‐basinal vegetation. The four stratigraphically lower roof shale samples yielded essentially similar palynological spectra, with 39 ± 4% lycophytes, 9 ± 4% sphenophylls, 23 ± 4% tree‐ferns, 12 ± 4% other ferns and 5 ± 3% cordaites. The palynology of the upper part of the investigated succession suggests a shift in vegetation towards one favouring more marattialean tree‐ferns, cordaites and conifers, and fewer lycophytes. This correlates with changes in drainage patterns as the alluvial plain migrated seawards and thus changed water tables. No evidence was found to suggest significant climate change at this time. Copyright © 2009 John Wiley & Sons, Ltd.  相似文献   

Experience of using a dynamic stochastic approach for solving the problem of very short-range forecasting of state parameters of the atmospheric boundary layer     

V. S. Komarov  A. V. Lavrinenko  N. Ya. Lomakina  S. N. Il’in 《Russian Meteorology and Hydrology》2014,39(2):77-83

Discussed are the results of applying a dynamic stochastic method based on the use of the two-dimensional model and the Kalman filtering algorithm for solving the problem of the very short-range (from 0.5 to 6 hours) fore cast of air temperature and orthogonal components of the wind speed in the atmospheric boundary layer realized using the data of radio metric, sodar, and in creased-frequency radiosonde measurements. It is demonstrated that the pro posed technique and the appropriate algorithm give a rather high ac cu racy of very short-range fore casting of temperature and wind within the lead time range under consideration.  相似文献   

An Integrated Study to Analyze Salt Lake Microbial Community Structure(Novosibirsk Oblast,Russia)     

Alla BRYANSKAYA  Alexey ROZANOV  Tatyana MALUP  Taisiya ALESHINA  Elena LAZAREVA  Oxana TARAN  Tatyana GORYACHKOVSKAYA  Vladimir IVANISENKO  Sergey PELTEK 《《地质学报》英文版》2014,88(Z1):61-62

正Salt Lake is one of the lakes in the system,consisting of a huge amount of salt and bitter-salty lakes in Novosibirsk Oblast and Altai Krai.These lakes are unique and highly unstable systems where the parameters of geochemical  相似文献