The Causes of the Global Variations of Carbon Isotopic Composition in the Biosphere E. M. Galimov p. 699 Distribution of Temperature and Elastic Wave Velocities in a Model of the Chemically Differentiated Moon V. A. Kronrod and O. L. Kuskov p. 714 Estimated Chemical Composition and Petrochemical Evolution of the Upper Continental Crust L. S. Borodin p. 723 The Magma Composition and Genesis of Theralite from the Mushugai Khuduk Carbonatite-bearing Complex in Southern Mongolia I. A. Andreeva, V. B. Naumov, V. I. Kovalenko, and N. N. Kononkova p. 735 Early Precambrian Tectono-Thermal Evolution of the Earth Crust in the Karelian and Belomorian Provinces of the Baltic Shield: U–Pb Isotopic Evidence from Sphene and Rutile E. V. Bibikova, A. I. Slabunov, S. V. Bogdanova, and T. Skiold p. 750 Mössbauer Spectroscopy as Applied to Isotopic Geochemistry: I. Equilibrium Fractionation of Iron Isotopes V. B. Polyakov and S. D. Mineev p. 765 Double – Decay of 130Te: A New Isotopic Geochronometer for Gold Mineralization M. M. Fugzan and Yu. A. Shukolyukov p. 777 Solid Bitumens of the Bazhenovo Formation of the West Siberian Plate and Their Main Geochemical Features A. E. Kontorovich, Yu. N. Zanin, V. N. Melenevskii,A. G. Zamirailova, A. N. Fomin, and D. Yu. Davydov p. 792 Application of the Virial Equation for the Thermodynamic Description of the Properties of Aqueous Electrolytes
in a Wide Range of State Parameters N. N. Akinfiev p. 800
Short Communications
Formation of the Isotopic Composition of Sulfate Oxygen and Sulfur upon Microbial Reduction: A Case Study of the Black Sea and the Sivash V. A. Grinenko and V. I. Ustinov p. 809 Thermal Atomic Absorption Analysis as Applied to Study the State of an Impurity in a Solid in the Range of Small Concentrations and to Assess the Miscibility Limits V. L. Tauson, V. I. Men’shikov, I. Yu. Parkhomenko, and K. V. Nepomnyashchikh p. 812