An Empirical Model of the Gibbs Free Energy for Solutions of NaCl and CaCl<Subscript>2</Subscript> of Arbitrary Concentration at Temperatures from 423.15 K to 623.15 K under Vapor Saturation Pressure     

M. V. Ivanov  S. A. Bushmin  L. Y. Aranovich 《Doklady Earth Sciences》2018,479(2):491-494

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First Results of U–Pb LA–ICP–MS Isotope Dating of Detrital Zircons from Arkose Sandstone of the Biryan Subformation of Zilmerdak Formation (Upper Riphean,South Urals)     

A. V. Maslov  Yu. V. Erokhin  A. Gerdes  Yu. L. Ronkin  K. S. Ivanov 《Doklady Earth Sciences》2018,482(2):1275-1277

Detrital zircons (DZs) from arkose sandstones of the Upper Riphean Zilmerdak Formation (Southern Urals) yielded ages in the range of 3039–964 Ma. Grains with Late Karelian and Early and Middle Riphean ages compose 35, 34, and 26% of the total number of the analyzed zircons, respectively. This is similar to the age spectra of the Vendian sandstones (Asha Group), but it differs significantly from the age distribution typical of the Riphean stratotype sandstones.  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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Climatic Changes in the Dynamic Topography and Geostrophic Circulation of the Arctic Ocean     

Timokhov  L. A.  Ivanov  V. V.  Kassens  H.  Lebedev  N. V.  Frolov  I. Ye.  Hölemann  J. 《Doklady Earth Sciences》2018,480(1):685-688

Doklady Earth Sciences - According to historical oceanographic data, anomalies in the dynamic topography during the winter period were calculated and two climatic stages of dynamic condition of the...  相似文献   

Natural ring structures on the Baikal ice cover: Analysis of experimental data and mathematical modeling     

N.G. Granin  I.B. Mizandrontsev  V.V. Kozlov  E.A. Tsvetova  R.Yu. Gnatovskii  V.V. Blinov  I.A. Aslamov  K.M. Kucher  V.G. Ivanov  A.A. Zhdanov 《Russian Geology and Geophysics》2018,59(11):1514-1525

Hydrophysical studies and mathematical modeling of ring structures during ice cover on Lake Baikal have shown that their existence at the stage of ice cover degradation is due to anticyclonic currents. Such currents can be generated as a result of local upwelling, which we associate with the rise of methane hydrates from the top layer of bottom sediments and their dissociation. Analysis of satellite images shows that the radii of ice rings range from 1300 to 2400 m, which is close to the baroclinic Rossby radius. The measured ice thicknesses in the area of the rings are in agreement with model calculations. Deep water renewal in Lake Baikal can also be associated with the rise of hydrates.  相似文献   

The Structure and Formation Conditions of the Callovian–Oxfordian Deposits of Sudak Bay (Crimea)     

R. R. Gabdullin  N. V. Badulina  E. A. Bakai  E. V. Rubtsova  A. Yu. Yurchenko  E. V. Karpova  A. V. Ivanov  M. A. Varzanova  A. V. Sergienko  T. A. Konovalova  M. V. Parakhina 《Moscow University Geology Bulletin》2018,73(4):346-360

The composition and origin of the Callovian–Oxfordian deposits of the Sudak Bay were characterized on the basis of the generalization and analysis of our own results, as well as published and unpublished data. The botanical future was first implemented for the geological mapping of the Oxfordian deposits.  相似文献   

The Nature of Platinoid Minerals from Gold Placers of Southern Sikhote-Alin (Primorye)     

Ivanov  V. V.  Khanchuk  A. I.  Kolesova  L. G. 《Doklady Earth Sciences》2021,498(2):482-486

Doklady Earth Sciences - Gold placers of two streams that drain Permian dislocated terrigenous deposits overlying Cambrian metagabbroids and metadiorites in southern Sikhote-Alin have been studied....  相似文献   

Nature And Age of Granites in the Central Part of the Western Siberian Platform (Case Study of the Krivolutskii Batholith)     

Erokhin  Yu. V.  Ivanov  K. S.  Koroteev  V. A.  Shaldybin  M. V.  Khiller  V. V. 《Doklady Earth Sciences》2021,496(1):1-6

Doklady Earth Sciences - The study of granites in the basement of the Western Siberian platform is highly relevant since they are associated with hydrocarbon deposits, which are located not only...  相似文献   

Ionic Composition of the Earth’s Exosphere during a Reversal of the Solar Magnetic Field     

Ivanov  M. S.  Lapshin  V. B. 《Doklady Earth Sciences》2021,497(2):310-313

Doklady Earth Sciences - This paper analyzes measurement data on the ionic composition of the upper atmosphere at altitudes of 810–830 km in the period from 2009 to 2018; the measurements...  相似文献   

Observations of Tilt Deformations in Moscow during the November 12, 2017, Earthquake at the Iran–Iraq Boundary     

Aleshin  I. M.  Ivanov  S. D.  Perederin  F. V.  Steblov  G. M.  Kholodkov  K. I.  Shirokov  I. A. 《Doklady Earth Sciences》2021,496(2):160-163

Doklady Earth Sciences - A residual tilt after a teleseismic earthquake is described in this work. The results of static and dynamic modeling of this event fit the measured values. The conditions...  相似文献