Geology of Ore Deposits, 2020, V 62, N 7.

The Symmetry Statistics of Mineral Species in 
Various Thermodynamic Environments
S. K. Filatov 
p. 547  

Granite Systems with Rare-Metal Pegmatites
S. M. Beskin and Yu. B. Marin 
p. 554  

The Niz’yavr Alkaline Pluton: Age, Isotope 
Characteristics, and Rare-Metal Mineralization
M. N. Petrovskiy 
p. 564  

The Lu–Hf Isotope Composition of Zircon from 
Syenites of the Saharjok Alkaline Massif, Kola Peninsula
V. R. Vetrin and E. A. Belousova 
p. 574  

Modeling of Mineral Parageneses and Thermobarometry 
of Metavolcanic Rocks of the Ruker Group in the 
Southern Prince Charles Mountains, East Antarctica
Yu. L. Gulbin and E. V. Mikhalsky 
p. 584  

New Minerals

Belogubite, a New Mineral of the Chalcanthite Group
from the Gaiskoe Deposit, South Urals, Russia
A. V. Kasatkin, S. N. Britvin, N. V. Chukanov, 
R. Škoda, A. A. Agakhanov and D. I. Belakovskiy 
p. 599  

Deltalumite, a New Natural Modification of 
Alumina with a Spinel-Type Structure
I. V. Pekov, I. P. Anikin, N. V. Chukanov, 
D. I. Belakovskiy, V. O. Yapaskurt, E. G. Sidorov, 
S. N. Britvin and N. V. Zubkova 
p. 608  

Minerals and Mineral Parageneses

The Mineral Composition of Paleoproterozoic 
Metamorphosed Massive Sulfide Ores in the Kola 
Region (A Case Study of the Bragino 
Ore Occurrence, Southern Pechenga)
A. A. Kompanchenko, A. V. Voloshin and A. V. Bazai 
p. 618  

Wolframoixiolite in Lithium–Fluorine Granites of 
the Arga–Ynnakh–Khaya Pluton, Yakutia
V. I. Alekseev, Yu. B. Marin and O. L. Galankina 
p. 629  

Chevkinite-(Се) and Perrierite-(Се) from the 
Island Arc Quartz Gabbronorite–Dolerite of 
the Ayu-Dag Intrusion, Crimean Mountains
E. M. Spiridonov, S. V. Filimonov, 
E. S. Semikolennykh, N. N. Korotaeva and
 N. N. Krivitskaya 
p. 638  

Chrome Spinels in Carbonate Veins of the 
Onguren Complex, Western Baikal Region
V. B. Savelyeva, E. P. Bazarova and 
E. A. Khromova 
p. 652  

Agates from Paleoproterozoic Volcanic 
Rocks of the Onega Structure, Central Karelia
E. N. Svetova and S. A. Svetov 
p. 669