Geochemistry International, 2001, V39, N 12.

 
Geochemical Systems Producing High-Carbonate Alkaline Groundwaters
in Upper Aquifers 
S. R. Krainov, A. P. Belousova, and B. N. Ryzhenko 
p. 1147   

Nature of Al-Si Antiordering in a Two-Phase Feldspar from Pektusan Volcano, 
Primorie 
A. R. Oganov, N. I. Organova, and V. S. Urusov 
p. 1160   

Role of Structural Impurities in Polymorphic Transformations in Quartz 
L. T. Rakov and G. I. Krylova 
p. 1172   

The Evolution of the Chemical and Mineral Compositions of Mesozoic 
and Cenozoic Silty-Sandy Rocks along a Tectonic Profile from the Russian 
Platform to the Caucasus Geosynclinal Region 
Yu. P. Girin 
p. 1179   

Numerical Simulation of the TP Stability Boundaries
of Spodumene Controlling Its Origin in Rare-Metal Granitic Pegmatites 
I. P. Ivanov† 
p. 1204   

Role of Tritium, 3He Precursor, in the Fractionation 
of Radiogenic Helium: Geochemical Application 
I. L. Kamenskii, I. N. Tolstikhin, M. A. Gannibal, V. A. Nivin, S. P. Orlov,
L. M. Ploshchanskii, B.E. Lehmann, H. H. Loosli, and I. V. Tokarev 
p. 1211   

On Benstonite and Benstonite Carbonatites 
S. V. Sokolov, G. A. Sidorenko, N. V. Chukanov, and N. I. Chistyakova 
p. 1218   

Sulfur Ecogeochemistry of Coal 
L. Ya. Kizil'shtein 
p. 1230   

Short Communications

40Ar/39Ar Dating of Ductile Deformations in the Irtysh Shear Zone, Eastern 
Kazakhstan 
A. V. Travin, A. Boven, A. V. Plotnikov, V. G. Vladimirov, K. Theunissen, 
A. G. Vladimirov, A. I. Melnikov, and A. V. Titov† 
p. 1237   

Equation of State of SiO2aq for Description of Silica Dissolution
at Temperatures of 0-600°C and Pressures of 1-1000 bar 
N. N. Akinfiev 
p. 1242   

Specific Features of Radon Earthquake Precursors 
A. A. Belyaev 
p. 1245   

Author Index to Volume 39, 2001 
p. 1251 

Contents of Volume 39, 2001 
p. 1255