Geology of Ore Deposits, 2020, V 62, N 5.

Dedicated to the 90th anniversary of IGEM RAS
Sulfur Isotope Fractionation During Sulfide Generation 
in the Hydrothermal Submarine Systems: 
The Case of Logatchev, Krasnov, and Rainbow 
Hydrothermal Fields, Mid-Atlantic Ridge
E. O. Dubinina, N. S. Bortnikov, O. O. Stavrova 
and S. A. Kossova 
p. 351  

Research of the Uranium, Niobium, and Tantalum 
Behavior in the Granite Melt–Chloride Fluid 
System at 750°C and 1000 Bar
A. F. Redkin and V. I. Velichkin 
p. 372  

Gold and Silver Minerals in Sulfide Ore
G. A. Palyanova 
p. 383  

Evolution of the Vagran Gold-Bearing Placer 
Cluster (Northern Urals) and Prospects for 
Revealing Bedrock Mineralization
A. V. Lalomov, V. A. Naumov, A. V. Grigorieva 
and L. O. Magazina 
p. 407  

The Dudica Epithermal Cu–Au Deposit 
(Republic of North Macedonia)
G. Tasev, D. Serafimovski, A. V. Volkov, B. Boev, 
T. Djordjevic, U. Kolitsch and T. Serafimovski 
p. 419  

Short Communications

Formation Environments of Metasomatites and
Ores of the Epithermal Gold–silver Deposits
I. N. Kigai 
p. 432