Vol. 491, No. 2, 2020

Doklady Earth Sciences

Geology

Paleoproterozoic and Neoproterozoic Quartzites of the Kyrgyz North Tianshan: Age Determination according to the Results of Detrital Zircon Dating

D. V. Alexeiev, A. K. Khudoley and S. A. DuFrane p. 191 abstract

The Development of Miocene Biohermal Bryozoan Limestones of Kazantip Cape (Crimea): A New Insight

A. I. Antoshkina, L. V. Leonova and Yu. S. Simakova p. 195 abstract

First Find of Platinum in Cosmogenic Spherules of Ferromanganese Crusts (Fedorov Guyot, Magellan Seamounts, Pacific Ocean)

D. P. Savelyev, Academician A. I. Khanchuk, O. L. Savelyeva, S. V. Moskaleva and P. E. Mikhailik p. 199 abstract

Geomorphology

New Insights into the Geomorphological Evolution of the West African Relief

V. I. Mamedov, V. A. Zaitsev, M. A. Makarova and V. S. Pashkov p. 204 abstract

Mineralogy

Crystal Structure of Yushkinite [(Mg_0.60Al_0.30V_0.10)_Σ1.0(OH)₂][V_0.875S₂]: An Example of a Commensurate Combination of Brucite and Sulfide Layers

S. V. Soboleva, T. E. Evstigneeva, N. M. Boeva and Academician N. S. Bortnikov p. 210 abstract

Mineral Composition of Manganese Crusts from Belyaevskii Volcano (Sea of Japan)

Yu. G. Volokhin, Academician A. I. Khanchuk, P. E. Mikhailik and E. V. Mikhailik p. 214 abstract

Ore Mineralization in Pleistocene Sediments of Long Strait (East Siberian Sea)

Corresponding Member of the RAS N. A. Goryachev, O. T. Sotskaya, A. S. Astakhov, Shi Xuefa, T. I. Mikhalitsyna, K. I. Aksentov and N. V. Berdnikov p. 220 abstract

Native Cobalt from the Regolith of Mare Crisium

A. V. Mokhov, T. A. Gornostaeva, P. M. Kartashov, A. P. Rybchuk and Academician O. A. Bogatikov p. 224 abstract

Fragments of Paleoproterozoic Large Igneous Provinces in Northern Fennoscandia: Baddeleyite U–Pb Age Data for Mafic Dykes and Sills

E. B. Salnikova, Corresponding Member of the RAS A. V. Samsonov, A. V. Stepanova, R. V. Veselovskiy, S. V. Egorova, A. A. Arzamastsev and K. G. Erofeeva p. 227 abstract

Geochemistry

Geochemistry of Rare Earth Metals in the Ore Eudialyte Complex of the Lovozero Rare Earth Deposit

Academician L. N. Kogarko p. 231 abstract

Isotope Fractionation and the Pressure Effect on ¹⁸O/¹⁶O in Kyanite-Sillimanite-Andalusite Polymorphs (Al₂SiO₅): Ab-Initio Modelling

D. P. Krylov, Corresponding Member of the RAS A. B. Kuznetsov and A. A. Gavrilova p. 235 abstract

Age of Granulites of the Cheremshanskaya Unit (Sharyzhalgai Uplift, Siberian Craton, Russia): New Data

S. V. Vysotskiy, Academician A. I. Khanchuk, V. I. Levitskii, E. I. Demonterova, I. V. Levitskii, A. V. Ignatiev and T. A. Velivetskaya p. 238 abstract

Geochemical Composition of Dolerites as an Indicator of the Distance of a Dike Swarm from the Mantle Plume Center (Case Study of Proterozoic Dike Swarms, Siberian Craton)

Corresponding Member of the RAS D. P. Gladkochub and T. V. Donskaya p. 243 abstract

An Abnormal Isotopic Composition of Oxygen in Zircon from Corundum-Bearing Metasomatites of the Dyadina Gora Ore Occurrence, Belomorian Mobile Belt

S. G. Skublov, S. A. Bushmin, Corresponding Member of the RAS A. B. Kuznetsov, X.-H. Li, Q.-L. Li, E. V. Levashova and E. V. Savva p. 247 abstract

Elevated Mercury in the Water of the Angara River Source: A Response to Geodynamic Impacts and Strong Earthquakes

V. I. Grebenshchikova, Academician M. I. Kuzmin, A. V. Klyuchevskii, V. M. Demyanovich and A. A. Kluchevskaya p. 253 abstract

New Data on the Concentrations of Dissolved Trace Elements in Waters of Russian Arctic Rivers

A. V. Savenko, V. S. Savenko and O. S. Pokrovsky p. 257 abstract

Biogeochemical Migration of Elements within the Lake Watershed of a Reference Site (Valdai Upland)

N. A. Gashkina and Corresponding Member of the RAS T. I. Moiseenko p. 264 abstract

Geophysics

Mechanism of the Generation of Abnormally High Accelerations >1g on Soft Soils during Earthquakes

O. V. Pavlenko p. 271 abstract

Seismology

The Contemporary Seismic Deficit in the Kuril–Kamchatka Subduction Zone

Corresponding Member of the RAS B. W. Levin, A. S. Prytkov, N. F. Vasilenko and D. I. Frolov p. 277 abstract

Geography

Regularities of the Distribution of Lake Areas on Thermokarst Plains with Fluvial Erosion

A. S. Victorov, T. V. Orlov, O. N. Trapeznikova, V. N. Kapralova and M. V. Arkhipova p. 282 abstract

Oceanology

Features of Propagation and Transformation of Low-Frequency Hydroacoustic Signals on a Shelf of Decreasing Depth

Academician G. I. Dolgikh, Piao Shengchun, S. S. Budrin, Song Yang, S. G. Dolgikh, V. V. Ovcharenko, V. A. Chupin, S. V. Yakovenko, Dong Yang, Wang Xiaohan and V. A. Shvets p. 285 abstract

Contents