Contents

Moscow University Geology Bulletin

Vol. 76, No. 4, 2021

Hydrocarbon Gas Seepage along the Gydratny Fault (Lake Baikal)

O. N. Vidishcheva, G. G. Akhmanov, M. A. Solovyeva, A. Mazzini, O. M. Khlystov, E. D. Egoshina, A. A. Kudaev, D. V. Korost, E. N. Poludetkina, N. V. Morozov and K. A. Grigorev p. 353  abstract

The Unpredictability of Strong Earthquakes: New Understanding and Solution of the Problem

N. V. Koronovskii, V. S. Zakharov and A. A. Naimark p. 366  abstract

The Lithological and Geochemical Characteristics and Paleoclimatic Conditions of Formation of the Turonian–Santonian Sediments of the Epicontinental Basin of the Russian Plate in the Voronezh Anteclise Region

R. R. Gabdullin, A. Yu. Puzik, S. I. Merenkova, I. R. Migranov, N. V. Badulina and M. D. Kazurov p. 374  abstract

Bitumens as a Cause of the Occurrence of the Low Electrical Resistivity Zones in the Basement Rocks of the West Siberian Plate

A. O. Khotylev, E. V. Kozlova, V. S. Belokhin, A. A. Maiorov, T. G. Isakova, N. V. Pronina, G. A. Kalmykov and O. V. Khotylev p. 383  abstract

An Experimental Study of the Possible Use of Opoka as a Si Source in Glass Production of the Turkestan Region, Kazakhstan

B. Ye. Zhakipbayev, Ya. O. Alferyeva, D. A. Ksenofontov and A. R. Kotel’nikov p. 398  abstract

On Oil Source Strata (Some Recent Aspects of Sedimentary Migration Naphthydogenesis Theory)

G. N. Gordadze, M. V. Giruts, A. A. Yusupova, E. V. Kozlova and O. V. Postnikova p. 407  abstract

The Composition of a Silicate Melt of Fluorite-Containing Ongonites at 700–800°C, 100 MPa, and Different Oxygen Fugacities

Ya. O. Alferyeva and A. S. Novikova p. 415  abstract

The Behavior of Lithium in the Liquidus Area of a High-Fluorine Granite System at Pressures from 100 to 500 MPa

T. I. Shchekina, A. A. Rusak, Ya. O. Alferyeva, E. N. Gramenitskiy, V. A. Khvostikov, A. R. Kotelnikov, A. Yu. Bychkov and N. G. Zinovieva p. 423  abstract

The Distribution of Trace Elements in Mud Volcano Sediments: Searching for Features of a Juvenile Component Impact

A. V. Maslov, V. P. Shevchenko and A. Yu. Bychkov p. 436  abstract

Fractionation of Rare Earth Elements and Yttrium in Aqueous Media: The Role of Organotrophic Bacteria

E. S. Kazak, E. G. Lebedeva, N. A. Kharitonova, G. A. Chelnokov and E. V. Elovsky p. 445  abstract

The Influence of Spatial Heterogeneity on the Results of Pumping Tests in an Confined Infinite Aquifer

N. E. Sizov, S. P. Pozdniakov and N. N. Muromets p. 459  abstract