Contents

Moscow University Geology Bulletin

Vol. 75, No. 5, 2020

The Origin of the Rhyolite Massif of the Upper Chegem Highland (North Caucasus)

N. V. Koronovskii and M. S. Myshenkova p. 453  abstract

Signs of Polychronous Deformations in Carbonate Rock Microstructures of the Katav–Yuryuzan Transpression Zone (Southern Urals)

A. V. Tevelev, A. A. Borisenko, M. I. Erokhina, S. S. Popov, A. A. Kosheleva and Yu. A. Gatovsky p. 463  abstract

Menshikovite Pd3Ni2As3 and Associating Minerals of Sulfide Ores at the Eastern Flank of the Oktyabrsky Deposit (Norilsk Ore Field)

E. M. Spiridonov, S. N. Belyakov, N. N. Korotaeva, K. V. Egorov, Yu. A. Ivanova, D. I. Naumov and A. A. Serova p. 472  abstract

The Zirconometry and Thermochronology of Migmatized Gneisses of the Gondaray Metamorphic Complex (Greater Caucasus)

V. Yu. Gerasimov, V. A. Snezhko, J. Mosar, A. N. Pismennyi, N. L. Enna and A. A. Ulyanov p. 481  abstract

The Peculiarities of the Sample Preparation of Bottom Sediments for ICP-MS Elemental Analysis

Ya. V. Bychkova, D.P. Starodymova, K. V. Shaikhutdinova, D. R. Dyagileva, M. A. Semernin, E. M. Dekunova, I. Yu. Nikolaeva and A. Yu. Bychkov p. 496  abstract

The Hydrogeochemical Features of Groundwater of the Bodrak River Basin, Kacha Uplift of Mountainous Crimea

E. P. Kayukova, T. A. Baraboshkina and E. A. Filimonova p. 506  abstract

Distinguishing Precambrian Active Morphostructures in the Northern Ladoga Region from Comprehensive Geological–Geomorphological Data

A. O. Agibalov, V. A. Zaitsev and A. A. Sentsov p. 515  abstract

Brief Communication

Patterns in the Organic-Acid Leaching of Fluorine from Rocks

A. V. Savenko and V. S. Savenko p. 522  abstract

The Patterns of the Ore–Metasomatic Zoning of the Svoboda District, the Malmyzh Au–Cu Porphyry Deposit

V. V. Svistunov p. 527  abstract

A Lithological and Geochemical Description of Lower Silurian Graptolite Shales (Yangtze Platform, People’s Republic of China)

Hao Yuexiang, T. A. Shardanova and Huang Chongxing p. 532  abstract

Determination of the Attenuation Factor via Seismoacoustic Studies in Wells to Estimate the Distribution of Heterogeneities in Artificial Soils

D. V. Shmurak p. 537  abstract

Summary of the 25-Year-Work of the Planet Earth System Interdisciplinary Scientific Workshop-Conference of the Department of Geology of Moscow State University

V. L. Syvorotkin p. 542  abstract