Phobos-grunt soil sampling device     

S. N. Alexashkin  Yu. K. Zaiko  S. E. Sutugin  O. E. Kozlov 《Solar System Research》2012,46(7):555-561

The main objective of the Phobos-Grunt spacecraft mission is to sample Phobos soil and delivery it to Earth. Soil sampling is performed by means of a soil sampling device. The article covers the structure of the soil sampling device, its main functions and operation cyclogram.  相似文献   

Geodynamic Model of the Neoproterozoic Evolution of the Yenisei Paleosubduction Zone (Western Margin of the Siberian Craton), Russia     

Kozlov  P. S.  Filippov  Yu. F.  Likhanov  I. I.  Nozhkin  A. D. 《Geotectonics》2020,54(1):54-67

Geotectonics - The article proposes a model of collisional and accretionary events of the Neoproterozoic at the western margin of the Siberian Craton based on the results of geological,...  相似文献   

Vertical Distribution of Methane in Baikal Water     

Mizandrontsev  I. B.  Kozlov  V. V.  Ivanov  V. G.  Kucher  K. M.  Korneva  E. S.  Granin  N. G. 《Water Resources》2020,47(1):122-129

Water Resources - Data on the vertical distribution of dissolved methane in Baikal water column are analyzed. The zone of open lake now shows an increase in the concentrations of dissolved methane...  相似文献   

Assessment of the Accuracy of Calculations Using the International Reference Ionosphere Model IRI-2016: I. Electron Densities     

Lyakhov  A. N.  Kozlov  S. I.  Bekker  S. Z. 《Geomagnetism and Aeronomy》2019,59(1):45-52

Geomagnetism and Aeronomy - The paper quantitatively compares the results of calculations of the electron density Ne by the International Reference Ionosphere model IRI-2016 with experimental data...  相似文献   

Atmospheric temperature sounding with the Fourier spectrometer     

V. V. Asmus  Yu. M. Timofeyev  A. V. Polyakov  A. B. Uspensky  Yu. M. Golovin  F. S. Zavelevich  D. A. Kozlov  A. N. Rublev  A. V. Kukharsky  V. P. Pyatkin  E. V. Rusin 《Izvestiya Atmospheric and Oceanic Physics》2017,53(4):428-432

Preliminary results of a space experiment using the IKFS-2 infrared sounder (Meteor-M2 satellite) showed high-quality of measurements of spectra of the outgoing thermal radiation of the atmosphere–surface system and the adequacy of developed IR radiation atmospheric models in the 15-μm carbon gas absorption band used to recover the vertical profiles of the atmospheric temperature. Outgoing radiation spectra measured by IKFS-2 instruments make it possible to restore vertical temperature profiles with errors close to 1K in most of the 0–30 km high-altitude region, except for the lower troposphere and altitudes above 30 km, where these errors are close to 2–3K.  相似文献   

Estimation of the ozone decrease possibility in the lower part of the <Emphasis Type="Italic">D</Emphasis> region under the action of a powerful radiowave     

S. Z. Bekker  S. I. Kozlov  S. V. Tasenko 《Geomagnetism and Aeronomy》2016,56(6):757-760

The possibility of the influence of a powerful radiowave on the ozone concentration in the lower part of the ionospheric D region is discussed on the basis of experiments at the Sura heating facility in March 2009, the results of which were published relatively recently by a group of authors. The results, which were obtained with the use of exact equations of the mesospheric ozone photochemistry, substantially disagree with some conclusions derived by the authors but do not completely deny their hypothesis on the possible influence on the ozone of internal gravity waves formed at heights of the ionospheric E region.  相似文献   

Late Vendian postcollisional leucogranites of Yenisei Ridge     

A. D. Nozhkin  I. I. Likhanov  V. V. Reverdatto  T. B. Bayanova  S. V. Zinoviev  P. S. Kozlov  N. V. Popov  N. V. Dmitrieva 《Doklady Earth Sciences》2017,474(2):674-679

The Late Vendian (540–550 Ma) U–Pb zircon age of postcollisional granitoids in the Osinovka Massif was obtained for the first time. The Osinovka Massif is located in rocks of the island-arc complex of the Isakovka Terrane, in the northwestern part of the Sayany–Yenisei accretion belt. These events stand for the final stage of the Neoproterozoic history of the Yenisei Ridge, related to the completing accretion of the oceanic crust fragments and the beginning of the Caledonian orogenesis. The petrogeochemical composition and the Sm–Nd isotopic characteristics support the fact that the granitoid melt originated from a highly differentiated continental crust of the southwestern margin of the Siberian Craton. Hence, the granite-bearing Late Riphean island-arc complexes were thrust over the craton margin at a distance considerably exceeding the dimensions of the Osinovka Massif.  相似文献   

Kyanite–sillimanite metamorphism of the Precambrian complexes,Transangarian region of the Yenisei Ridge     

I.I. Likhanov  V.V. Reverdatto  P.S. Kozlov  N.V. Popov 《Russian Geology and Geophysics》2009,50(12):1034-1051

Four Precambrian metamorphic complexes in the vicinity of regional faults in the Transangarian region of the Yenisei Ridge were examined. Based on geothermobarometry and P-T path calculations, our geological and petrological studies showed that the Neoproterozoic medium-pressure metamorphism of the kyanite–sillimanite type overprinted regionally metamorphosed low-pressure andalusite-bearing rocks at about 850 Ma. A positive correlation between rock ages and P-T estimates for the kyanite-sillimanite metamorphism provide evidence of the regional structural and tectonic heterogeneity. The medium-pressure metamorphism was characterized by (1) the development of deformational structures and textures, and kyanite-bearing blastocataclasites (blastomylonites) with sillimanite, garnet, and staurolite after andalusite-bearing regional metamorphic rocks; (2) insignificant apparent thickness of the zone of medium-pressure zonal metamorphism (from 2.5 to 7 km), which was localized in the vicinity of the overthrusts; (3) a low metamorphic field gradient during metamorphism (from 1–7 to 12 °C/km); and (4) a gradual increase in lithostatic pressure towards the thrust faults. These specific features are typical of collisional metamorphism during overthrusting of continental blocks and are evidence for near-isothermal loading. This event was justified within the framework of the crustal tectonic thickening model via rapid overthrusting and subsequent rapid uplifting and erosion. The results obtained allowed us to consider medium-pressure kyanite-bearing metapelites as a product of collision metamorphism, formed either by unidirectional thrusting of rock blocks from Siberian craton onto the Yenisei Ridge in the zones of regional faults (Angara, Mayakon, and Chapa areas) or by opposite movements in the zone of splay faults of higher orders (Garevka area).  相似文献   

Two stages of high-pressure metamorphism in the Main Uralian Fault area (northern Urals)     

G.A. Petrov  Yu.L. Ronkin  N.V. Popov  N.I. Tristan  P.S. Kozlov 《Russian Geology and Geophysics》2009,50(1):43-45

Metamorphism in the northern sector of the Main Uralian Fault (MUF) area, northern Urals, is considered by the example of the Salatim glaucophane-schist and Belokamenka kyanite-staurolite complexes. New isotope-geochronological dates for metamorphic rocks of the MUF area are presented. The obtained data evidence the existence of two metamorphic events, of Early and Late Devonian ages, which apparently correspond to the wedging-up of subduction paleozones.  相似文献   

Rock transformations in spherically converging shock waves: Newly obtained experimental results     

E. A. Kozlov  L. V. Sazonova 《Petrology》2012,20(4):301-316

The paper presents a concise review of results obtained by studying shock metamorphism of polymineralic rocks with the application of spherical hermetically sealed recovery devices. Such experiments are proved to be able to reproduce principally important features of transformations detected in rocks from natural meteoritic craters (astroblemes). The experimental samples show subspherical concentric zones with different rock transformations, which are generally analogous to zones in natural astroblemes (listed in order from the centers of the spherical samples to their margins): fracturing, diaplectic transformations, selective and then complete melting, and finally, evaporation. However, the laboratory scale of the experiments and the absence of younger overprinted processes, which can obliterate impact transformations of rocks in nature, enable the researcher to reveal distinctive compositional, textural, and phase features of transformations induced in the rocks at increasing isentropic shock wave-induced loading. Data on the mobility of major elements in the course of impact metamorphism show that the type and certain features of the crystal structures of minerals are of paramount importance for the amorphization of the minerals or their shock wave-induced thermal decomposition. The crystal chemical control of mineral transformations was proved to be exerted at a number of levels. High-pressure phases identified in experiments with shock wave loading were determined to crystallize from melt or via a phase transition associated with the migration of elements.  相似文献