Doklady Earth Sciences, 2025, V 524, N 2, October.

STRATIGRAPHY

The First Detailed δ13Соrg Record in the Asselian Deposits
of Western Verkhoyanie, Northeastern Russia
R. V. Kutygin, V. I. Makoshin, A. S. Biakov, 
N. G. Nurgalieva, and B. I. Gareev 
p. 23  

GEOCHEMISTRY

Geochemistry and Petrogenesis of Kong Chro Granitoid, 
Kontum Massif, Central Vietnam
Pham Minh, Truong Chi Cuong, Doan Dinh Hung, Pham Trung Hieu, 
Pham Hong Phong, and Nguyen Thi Truong Giang 
p. 24  

SEISMOLOGY

Beltir Earthquake, February 15, 2025 (Ms = 5.7, Altai Mountains): 
Results of Geological and Seismological Research in the Nearby Zone
A. N. Ovsiuchenko, R. N. Vakarchuk, A. S. Larkov, 
N. G. Koshevoy, Y. V. Butanayev, Academician S. A. Tikhotsky, 
R. E. Tatevosyan, I. E. Parini, I. V. Matveev, 
and O. Yu. Kashitsyna 
p. 25  

OCEANOLOGY

Experimental Validation of a Long-Range Underwater 
Acoustic Communication Method in the Sea of Japan
A. A. Golov, V. V. Bezotvetnykh, and Yu. N. Morgunov 
p. 26  

SOIL SCIENCE

Soil Organic Carbon Pools: Isolation Methods, Sizes, and Ratios
V. M. Semenov, T. N. Lebedeva, D. A. Sokolov, 
N. B. Zinyakova, and Corresponding Member of the RAS 
V. N. Kudeyarov 
p. 27  

GEOLOGY

King’s Trough: An Ancient Analogue of the 
Terceira Rift (North Atlantic)
A. A. Peyve, and A. A. Tkacheva 
p. 28  

STRATIGRAPHY

Middle Eocene Carbonate Deposition and Sea-level Dynamics: 
Insights from the Zindapir Area, 
Eastern Sulaiman Range, Pakistan
Muhammad Jehangir Khan, Shahid Ghazi, Xiaodong Yang, 
Mubashir Mehmood, Bilal Wadood, Muhib Ullah, 
Umair Sarwar, Aftab Ahmad Butt, Tanveer Ahmad, 
and Ishfaq Ahmad 
p. 29  

GEOCHEMISTRY

The First Discovery of Isotopic (δ34S, Δ33S) Sulfur 
Anomalies in Authigenic Sulfides from the 
Permian–Triassic Boundary Deposits of Siberia
S. V. Vysotskii, Academician A. I. Khanchuk, 
T. A. Velivetskaya, A. V. Ignatiev, Yu. D. Zakharov, 
V. V. Yakovenko, A. S. Biakov, I. V. Brynko, 
I. L. Vedernikov, and R. V. Kutygin 
p. 30  

PALEONTOLOGY

The Occurrence of Suidae (Artiodactyla, Mammalia) 
in the Late Villafranchian Fauna of Crimea 
(Taurida Cave, Early Pleistocene) and 
the “Suid Gap” Hypothesis
Academician A. V. Lopatin 
p. 31  

OCEANOLOGY

Propagation of Intermediate Waters
in the North Atlantic
Ia. T. Samborskaia, A. N. Demidov, 
and Academician S. A. Dobrolubov 
p. 32  

SOIL SCIENCE

Effect of Salt Solutions on Rheological
Properties and Water Retention of Soils
G. N. Fedotov, Corresponding Member of the 
RAS S. A. Shoba, I. V. Gorepekin, D. A. Tarasenko, 
A. I. Suharev, T. G. Kalnin, Z. S. Sultanova, 
A. J. Purkhanova, and S. P. Sabirova 
p. 33  

GEOCHEMISTRY

Research on Hydrothermal Rock Reaction and 
Hydrochemical Evolution Process: A 
Case Study of Yunnan Simao Basin
Lei Chen, Jinchuan Zhang, Xuan Tang, 
Jie Li, Yuhang Sun, Longfei Xu, and Qianchao Li 
p. 34  

PETROLOGY

Late Cretaceous Rapakivi Granites and Associating 
Rocks in the Evolution of the Okhotsk-Chukotka Active Margin
A. E. Vernikovskaya, Corresponding member 
of the RAS V. Yu. Fridovsky, N. Yu. Matushkin, Y
a. A. Tarasov, E. A. Bogdanov, N. V. Rodionov, 
and P. I. Kadilnikov 
p. 35  

MINERALOGY

Graphite-Rare-Earth Mineralization of Picrites 
of the Ariadne Ultrabasite-Basite Massif (Promorye)
V. P. Molchanov, and Academician A. I. Khanchuk 
p. 36  

First Discovery of Loparite-(Ce) in Carbonatites 
of the Guli Complex (Polar Siberia, Russia): 
Zoning of Crystals, Isomorphic Substitutions, 
and Genetic Features
K. N. Malitch, N. V. Sorokhtina, Academician L. N. Kogarko, 
Yu. V. Shchapova, I. Yu. Badanina, 
V. A. Bulatov, and N. S. Chebykin 
p. 37  

GEOPHYSICS

The Effect of the Mineralogical Composition of 
the Martian Mantle on the Model Value 
of the Chandler Wobble Period
E. A. Kulik, and T. V. Gudkova 
p. 38  

OCEANOLOGY

Internal Tide Near Critical Latitudes in the Norwegian Sea
Corresponding Member of the RAS E. G. Morozov, 
D. I. Frey, A. A. Klyuvitkin, and A. N. Novigatsky 
p. 39  

GEOLOGY

First Find of Ordovician Granitoids in Senyavin 
Granite-Metamorphic Dome, East Chukotka: 
Age Substantiation and Composition Affinities
M. V. Luchitskaya, A. P. Isaeva, and Corresponding 
Member of the RAS S. D. Sokolov 
p. 40  

First Results of U–Pb (LA-ICP-MS) Dating of Acidic 
Volcanic Rocks from Basal Horizons of the 
Upper Precambrian of the Subpolar Urals
A. M. Pystin, Yu. I. Pystina, O. V. Grakova, and V. B. Khubanov 
p. 41  

STRATIGRAPHY

Maximum Depositional Age of Pre-Middle Paleozoic 
Terrigenous Rocks of the Vychegda Trough 
(Northeast of the East European Platform): 
Results of U–Pb Dating of Detrital Zircons
V. B. Ershova, V. N. Podkovyrov, A. S. Ivleva, 
and Corresponding Member of the RAS A. V. Maslov 
p. 42  

TECTONICS

The Lower Proterozoic Metasandstones of the Sakukan 
Formation of the Udokan Complex of the South of 
the Siberian Craton—A Unique Object for the 
Early Precambrian Paleomagnetism?
V. Yu. Vodovozov, A. P. Belyakov, N. A. Bozhko, 
Corresponding Member of the RAS A. B. Kotov, 
V. P. Kovach, E. V. Adamskaya, and 
T. M. Skovitina 
p. 43  

GEOPHYSICS

Investigation of the Development of Instability 
of Viscoelastic Geosystems Based on the Study 
of Stability and Instability of Elastic 
Systems of Comparison
E. I. Ryzhak and S. V. Sinyukhina 
p. 44  

SEISMOLOGY

Automated Method for Merging Earthquake 
Catalogs with Duplicate Identification
I. A. Vorobieva, P. A. Malutin, and Corresponding 
Member of the RAS P. N. Shebalin 
p. 45