Geochemical Constraints for the Bulk Composition of the Moon     

Kronrod  E. V.  Kronrod  V. A.  Kuskov  O. L.  Nefedyev  Yu. A. 《Doklady Earth Sciences》2018,483(1):1475-1479

Doklady Earth Sciences - The bulk composition of the silicate Moon (crust + mantle, BSM) is determined on the basis of inversion of gravitational and seismic data. It is shown that the mantle...  相似文献   

Genesis of Diamond in Metal–Carbon and Metal–Sulfur–Carbon Melts: Evidence from Experimental Data     

Zhimulev  E. I.  Chepurov  A. I.  Sobolev  N. V. 《Doklady Earth Sciences》2018,483(1):1473-1474

Doklady Earth Sciences - The experimental data on diamond growth in the Fe–Ni–S–C and Fe–S–C systems with a sulfur content of 5–14 wt % at 5.5 GPa and...  相似文献   

Determination of the Spins of Supermassive Black Holes in FR I and FR II Radio Galaxies     

A. G. Mikhailov  Yu. N. Gnedin 《Astronomy Reports》2018,62(1):1-8

The spins of supermassive black holes in FR I and FR II radio galaxies are estimated using two models for the generation of the relativisitic jets, based on the Blandford–Znajek and Blandford–Payne mechanisms: the hybrid model of Meier and a flux-trapping model. The magnetic field at the event horizon is estimated assuming equipartition between the energy densities of the magnetic field and the accreting material. The magnetic field near the inner edge of the accretion disk is estimated assuming equipartition between the magnetic pressure and the radiation pressure, and also assuming proportionality between the magnetic field and the spin. In the case of FR I objects, both mechanisms for the generation of the jets (the hybrid model of Meier and a flux-trapping model) are efficient. For the FR II objects, equipartition between the energy densities of the magnetic field and the accretion flow facilitates stronger retrograde rotation of the supermassive black hole. Plots of spin versus mass suggest a predominantly chaotic character for the accretion in both types of radio galaxies.  相似文献   

Numerical Simulations of Magnetized Astrophysical Jets and Comparison with Laboratory Laser Experiments     

V. S. Belyaev  G. S. Bisnovatyi-Kogan  A. I. Gromov  B. V. Zagreev  A. V. Lobanov  A. P. Matafonov  S. G. Moiseenko  O. D. Toropina 《Astronomy Reports》2018,62(3):162-182

The results of MHD numerical simulations of the formation and development of magnetized jets are presented. Similarity criteria for comparisons of the results of laboratory laser experiments and numerical simulations of astrophysical jets are discussed. The results of laboratory simulations of jets generated in experiments at the Neodim laser installation are presented.  相似文献   

An Archaean Tonalite–Trondhjemite–Granodiorite Association of the Kursk Block (Voronezh Massif): Composition,Age, and Correlation with the Ukrainian Shield     

Savko  K. A.  Samsonov  A. V.  Larionov  A. N.  Korish  E. Kh.  Bazikov  N. S. 《Doklady Earth Sciences》2018,478(1):115-119

Doklady Earth Sciences - Framing of the Archaean greenstone belts of the Kursk Block (KB) of the East Sarmatia preserves rocks of the TTG association: those do not form massifs with distinct...  相似文献   

Foidite and Meimechite Lavas of Polar Siberia (Some Questions of Petrogenesis)     

Vasil’ev  Yu. R.  Gora  M. P.  Kuzmin  D. V. 《Doklady Earth Sciences》2018,478(1):103-107

Doklady Earth Sciences - For the Permian–Triassic foidite and meimechite lavas of Polar Siberia, both the whole-rock petrochemistry and geochemistry and that of melt inclusions in olivine...  相似文献   

Aerosols in the Near-Water Surface Layer of the Caspian Sea     

Lisitzin  A. P.  Lukashin  V. N.  Novigatsky  A. N.  Klyuvitkin  A. A.  Dara  O. M.  Politova  N. V. 《Doklady Earth Sciences》2018,478(2):268-273

The first data on the concentrations, fluxes, and mineral and chemical compositions of aerosols from the near-water surface layer of the Caspian Sea are presented. It is shown that the aerosol fluxes onto the sea surface are comparable to the fluxes of a lithogenic substance in a water column. The mineral and chemical compositions of aerosols depend on the carrying air masses that pass through different regions. The coefficients of enrichment of aerosols with chemical elements relative to the upper lithosphere and their correlation relationships are studied.

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Evaluation of the Atlantic Multidecadal Oscillation Impact on Large-Scale Atmospheric Circulation in the Atlantic Region in Summer     

Semenov  V. A.  Cherenkova  E. A. 《Doklady Earth Sciences》2018,478(2):263-267

Doklady Earth Sciences - The influence of the Atlantic Multidecadal Oscillation (AMO) on large-scale atmospheric circulation in the Atlantic region in summer for the period of 1950–2015 is...  相似文献   

The Stress–Strain State of Recent Structures in the Northeastern Sector of the Russian Arctic Region     

Imaeva  L. P.  Imaev  V. S.  Mel’nikova  V. I. 《Doklady Earth Sciences》2018,479(1):371-374

Doklady Earth Sciences - Complex research to determine the stress–strain state of the Earth’s crust and the types of seismotectonic destruction for the northeastern sector of the...  相似文献   

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