Geochemistry International, 2004, V 42, N 5, May.

Composition and Sources of Magmas in Medvezh’ya 
Caldera (Iturup Island, Southern Kuriles)
from a Study of Melt Inclusions 
V. I. Kovalenko, V. B. Naumov, M. L. Tolstykh,
G. M. Tsareva, and N. N. Kononkova 
p. 393  

Geochemistry of a Neutrally Buoyant Plume 
above the Rainbow Hydrothermal Field 
and Related Fluxes of Sedimentary Material 
V. N. Lukashin, D. L. Aleinik, A. B. Isaeva,
A. Yu. Lein, and G. M. Vinogradov 
p. 414  

Pore Solutions in the Rocks of the Schlema
Uranium Deposit, Erzgebirge,
and Their Role in Ore Formation 
Vikt. L. Barsukov 
p. 428  

Genesis and Composition of Borates of the 
Ludwigite–Vonsenite Series in Magnesian Skarns
of the Urals, Siberia, and the Russian Far East 
S. M. Aleksandrov and M. A. Troneva 
p. 449  

Genesis of Stratiform Pb–Zn Deposits in 
Carbonate Rocks: A Hydrogeochemical Approach 
B. N. Ryzhenko and S. R. Krainov 
p. 465  

Short Communications 

Isotopic Geochemical Parameters of the 
Formation of Schorl–Dravite Tourmaline 
from Hydrothermal Deposits in the Urals 
V. I. Ustinov and I. A. Baksheev 
p. 490

Model Equation of State for the Numerical Solution of the Problems
of Multicomponent Filtration with Phase Transitions 
A. V. Koldoba, E. V. Koldoba, and S. V. Skachkov 
p. 493