Geochemistry International, 2000, V 38, N 5.

Geochemical and Age Heterogeneity of Titanites
from the Orthogneisses of Pon'gom Navolok Island
O. A. Levchenkov, I. M. Gaidamako, A. F. Makeev, S. Z. Yakovleva,
S. V. Klepinin, T. F. Zinger, A. N. Komarov, and L. K. Levskii
p. 421  

Subalkali and Li-F Granites of the Central Cis-Sayan Region:
Rb-Sr Age and Sr Isotopic Composition
Yu. A. Kostitsyn and E. N. Altukhov 
p. 429  

Evolution of Composition of High-Temperature Fumarolic Gases
from Kudryavy Volcano, Iturup, Kuril Islands: the Thermodynamic Modeling
S. V. Churakov, S. I. Tkachenko, M. A. Korzhinskii,
R. E. Bocharnikov, and K. I. Shmulovich 
p. 436  

Uranium of Sedimentary Apatite in Catagenesis
Yu. N. Zanin, A. G. Zamirailova, L. G. Gilinskaya, A. N. Fomin,
and A. D. Kireev 
p. 452  

Geochemical Conditions of the Application of the Extended Davies Equation
to the Calculation of Activity Coefficients of Ions in Highly Concentrated
Solutions
G. A. Solomin and S. R. Krainov 
p. 459  

Thermodynamic Modeling of Biotite Stability in Assemblage
with Feldspar, Quartz, Fayalite, Pyrrhotite, and Ilmenite
in a C-O-H-S-F Fluid at 427-1027°C and 2 kbar
S. S. Abramov 
p. 464  

Organic Trace Contaminants in Fresh Natural Waters from the 
Drainage Basins of Tom' and Upper Ob' Rivers
A. E. Kontorovich, S. L. Shvartsev, V. A. Zuev, N. M. Rasskazov,
and Yu. P. Turov 
p. 480  

Geochemical Transformation of Minerals from Mine Tailings
of the "Apatite" Joint-Stock Company under the Action of Natural and
Anthropogenic Factors
A. P. Zosin, T. I. Priimak, and L. B. Koshkina 
p. 491  


Short Communications


Volatile Components (H2O, Cl, F, S, and CO2) in Magmatic Melts
of Various Geodynamic Environments
V. B. Naumov, V. I. Kovalenko, V. V. Yarmolyuk, 
and V. A. Dorofeeva 
p. 500  

Formation of Antimony (III) Complexes in Alkali Sulfide Solutions
at High Temperatures: An Experimental Raman Spectroscopic Study
L. V. Gushchina, A. A. Borovikov, and A. P. Shebanin 
p. 510

The Study of Heavy Metal Distribution in the Novosibirsk Reservoir
Ecosystem
N. I. Ermolaeva, S. Ya. Dvurechenskaya, and G. N. Anoshin 
p. 514