The Paleoproterozoic Kolvitsa Anorthosite Massif: New Data on the U–Pb Age (ID TIMS) and Geochemical Features of Zircon     

Steshenko  E. N.  Nikolaev  A. I.  Bayanova  T. B.  Drogobuzhskaya  S. V.  Chashchin  V. V.  Serov  P. A.  Lyalina  L. M.  Novikov  A. I.  Elizarov  D. V. 《Doklady Earth Sciences》2018,479(1):366-370

Doklady Earth Sciences - The rocks and minerals of the Kolvitsa massif are studied by complex isotopic–geochronological and geochemical (U–Pb, Sm–Nd, REE contents of zircons)...  相似文献   

Mineral Composition and Structure of the Sverdlovsk Meteorite (H4-5)     

Berzin  S. V.  Koroteev  V. A.  Ivanov  K. S.  Kleimenov  D. A.  Kiseleva  D. V.  Cherednichenko  N. V. 《Doklady Earth Sciences》2018,479(1):390-392

A fragment of the Sverdlovsk Meteorite, which was found in 1985 in the Central Urals, is studied by modern analytical methods. It belongs to H chondrites of petrologic type 4–5; shock stage of meteorite is S1-2, terrestrial weathering is W1. The composition of minerals of the meteorite is studied. It is found for the first time that the metal and sulfides are concentrated in fine veinlets of the recrystallized matrix of the chondrite and are accompanied by segregations of metal and troilite inside these veinlets. The distribution of trace elements of the metal phase of the meteorite is studied.

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Recognition of Strong Earthquake Prone Areas in the Altai–Sayan–Baikal Region     

Gorshkov  A. I.  Soloviev  A. A.  Zharkikh  Ju. I. 《Doklady Earth Sciences》2018,479(1):412-414

The locations of areas prone to strong earthquakes (M ≥ 6.0) in the Altai–Sayan–Baikal region are determined. Based on a scheme of morphostructural zoning of the region and by using the CORA-3 pattern recognition algorithm, all intersections of morphostructural lineaments are separated into two classes: the highly seismic intersections in the vicinities of which strong earthquakes can occur and low seismic in the vicinities of which only earthquakes with M < 6.0 are possible. Recognition was performed for the vectors the components of which were measured values of the geological–geophysical characteristics describing the respective intersection. The result obtained allows the zones of high seismic hazard to be identified more reliably in the region.

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Geochemical Features of Cupriferous Sandstones in the Orenburg Area of the Ural Region     

Volkov  A. V.  Novikov  I. A.  Razumovskiy  A. A.  Murashov  K. Yu.  Sidorova  N. V.  Sidorov  A. A. 《Doklady Earth Sciences》2018,479(1):393-396

The new geochemical data obtained of cupriferous sandstones of the Orenburg area of the Ural region show that the Permian host stratum could have served as the source of rare-earth elements and other microelements for the ore-forming fluids. They confirm the possibility of using a convection model to explain the genesis of the copper ores studied. This model indicates the likely multistage development of mineralization to significant depths, like in the Manto deposits in Chili. Consequently, the Permian cupriferous sandstones of the southwestern area of the Ural region can be considered a very promising source of raw material for the development of copper industry in the area.

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On the Final Gravitational Wave Burst from Binary Black Holes Mergers     

J. F. Rodriguez  J. A. Rueda  R. Ruffini 《Astronomy Reports》2018,62(12):940-952

We use perturbation theory in the strong-field regime to study the inspiral-to-plunge transition of a test particle into a Kerr black hole. We found a smooth transition, without burst, and with lower energy and angular momentum radiated in gravitational waves with respect to previous treatments in the literature. Besides their theoretical interest, our results are relevant for the waveform templates of binary black hole mergers used for gravitational waves detection which are constructed on the basis of a inspiral-to-plunge transition with a high energetic burst.  相似文献   

Relativistic Metrology of Near-Earth Space–Time and Its Practical Applications     

Fateev  V. F. 《Astronomy Reports》2018,62(12):1036-1041

Astronomy Reports - Results of studies of relativistic effects for the time and frequency shifts for an Earth–satellite system of atomic clocks, and also for moving clocks on the Earth, are...  相似文献   

Dynamics of Natural Satellites of Planets Based on Observations     

Emelyanov  N. V. 《Astronomy Reports》2018,62(12):977-985

There is wide interest in the results of studies of the dynamics of satellites of planets. Such data are needed to determine the physical properties of celestial bodies, and they may be able to provide information about the origins and evolution of the solar system. The general approach to studying the dynamics of satellites involves developing models for the motion and ephemerides based on observational data. Ephemerides are required to prepare and launch space missions to other planets and help discover new celestial bodies. High-precision astrometric coordinates of the principal satellites of Jupiter, Saturn, and Uranus are derived from photometric observations of occultations and eclipses of these satellites. To this end, worldwide observing campaigns have been organized. Enhancement in the precision of ephemerides can be obtained not only by increasing the accuracy of observations, but also by expanding the time interval covered by the observations. Many new, distant satellites of the major planets were discovered in the early 21st century. However, observations of these satellites are scarce and were obtained over short time intervals; as a result, some of these satellites were lost. To date, 179 natural satellites are known. This paper is based on a presentation made at the conference “Modern Astrometry 2017,” dedicated to the memory of K.V. Kuimov (Sternberg Astronomical Institute, Moscow State University, October 23–25, 2017).

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Next Generation Space Gravimetry: Scientific Tasks,Concepts, and Realization     

Milyukov  V. K.  Yeh  Hsien-Chi 《Astronomy Reports》2018,62(12):1003-1012

Astronomy Reports - A review of the achievements of space geodesy in the 21st century, represented by the successful realization of the CHAMP, GOCE, and GRACE missions, is presented. The main...  相似文献   

Cosmology and Astrometry     

Sazhin  M. V.  Zharov  V. E.  Kalinina  T. A.  Sementsov  V. N. 《Astronomy Reports》2018,62(12):1026-1029

Astronomy Reports - It has recently become clear that the potential role of astrometry in cosmological studies has been underestimated. Some areas of cosmology that should be investigated using...  相似文献   

Studies of Particulate Matter Distribution by Aqua Modis Data and Simulation Results     

Matishov  G. G.  Shulga  T. Ya.  Khartiyev  S. M.  Ioshpa  A. R. 《Doklady Earth Sciences》2018,481(1):967-971

Doklady Earth Sciences - Ways of combined usage of data obtained by the satellite sounding of the marine surface along with modeling approaches are considered. The technique of data application is...  相似文献