Geochemistry International, 2003, V 41, N 5, May.

Experimental Investigation of Factors Controlling the Composition of Glasses 
from the Lunar Regolith 
O. I. Yakovlev, Yu. P. Dikov, M. V. Gerasimov, F. Wlotzka, and J. Huth 
p. 417  

Macro- and Microvariations in the Carbon and Oxygen Isotopic Composition 
of Precambrian Carbonates from the Aldan Shield 
V. N. Guliy and H. Wada 
p. 431 

Genesis and Composition of Ore-Forming Magnesian Borates, 
Their Analogues, and Modifications 
S. M. Aleksandrov 
p. 440 

Difference in the Mechanisms and Rates of Quartz Dissolution
s and Precipitation at 150°C 
V. A. Alekseyev, L. S. Medvedeva, and Yu. G. Tatsii 
p. 459 

A Pitchblende Spherulite from the Schlema–Alberoda Deposit, Erzgebirge, Germany: 
Mineral Assemblage and Xe–Xe Age of Hydrothermal Metamorphism 
Yu. M. Dymkov and N. T. Sokolova 
p. 467  

A Model for the Formation of the Inverse Geochemical Zoning of Ground Waters 
in Deep Horizons of Oil and Gas Structures 
S. R. Krainov, B. N. Ryzhenko, and Yu. S. Pavlov
p. 474 

Short Communications 

Geochemical Indicators of Facies and Genetic Types of Parent Organic Matter 
V. A. Chakhmakhchev and T. L. Vinogradova 
p. 497 

Physicochemical Principles of the Behavior of the Magmatic
Melt + Gas Phase System  in a Gravitational Field 
A. A. Yaroshevskii 
p. 503 

An Authigenesis of Glauconite in Association with Unconformity: 
A Case Study from the Albian/Cenomanian Boundary at Gabal Shabrawet, Egypt 
H. A. Wanas 
p. 511