Geokhimiya, 1998, V 35, N 8.

Average Chemical Composition of the Main Groups
of Magmatic Associations in the Earth Crust
A. A. Yaroshevsky 
p. 689  

Inclusions of Native Metals and Other Minerals in Diamond
from Kimberlite Pipe 50, Liaoning, China
A. I. Gorshkov, Yan Nan Bao, L. V. Bershov, I. D. Ryabchikov,
A. V. Sivtsov, and M. I. Lapina 
p. 695  

Archean Granites in Karelia as Indicators
of the Composition and Age of the Local Continental Crust
V. P. Chekulaev, S. V. Lobach-Zhuchenko, and L. K. Levskii 
p. 704

Radiogenic Argon as an Indicator of the Inheritance
of Material during Glauconite Hydrothermal Transformations
I. M. Morozova, N. I. Bezmen, A. V. Maslenikov, O. V. Yakovleva,
 A. N. Komarov, and L. K. Levskii 
p. 716  

Thermophysical Criterion for Melt Vitrification in Magmatic 
Bodies
A. N. Cherepanov and V. N. Sharapov 
p. 724  

Geochemistry of the Ore-forming Elements in the Carbonaceous 
Matter of Metasediments from the Baikal–Patom Highland
E. A. Razvozzhaeva, V. A. Makrygina, and D. Kh. Martikhaeva
 p. 733  

Thermal Model of Metasomatic Ore Rhythms
A. A. Belyaev 
p. 741  

Kaolinite and Halloysite Synthesis
in the Gibbsite–Silica Solution System under Normal Conditions
B. A. Bogatyrev, L. A. Matveeva, V. V. Zhukov, and L. O. Magazina
p. 747  

Lithogenesis and Its Role in Biomarker Distribution in Organic Matter
of Oil–Gas Source Rocks
M. G. Frik
 p. 758  


Short Communications


Stability Constant of SnFCl0 at 500°C, 1 kbar,
and a Constant Fugacity of H2 (Ni/NiO Buffer)
N. I. Kovalenko and B. N. Ryzhenko
p. 766  

Precambrian Granite-Gneiss from the Mid-Atlantic Ridge (26° N):
A U–Pb and Sm–Nd Isotopic Study
B. V. Belyatskii, L. K. Levskii, A. I. Trukhalev, 
Yu. E.  Pogrebitskii, I. M. Vasil'eva, , and N. A. Kurentsova 
p. 770