New Data on Cs and Rb Distribution between Potassium Feldspar and Alkaline Fluid: A Study of the “Trapping Effect” V. L. Tauson, V. K. Taroev, V. V. Akimov, J. Gottlicher, H. Pentinghaus, and A. Rocholl p. 725Multiple Gabbro–Granite Intrusive Series of the Syrostan Pluton, Southern Urals: Geochemistry and Petrology V. S. Popov, N. F. Nikiforova, V. I. Bogatov, S. M. Lyapunov, and P. L. Tikhomirov p. 732
The Role of Sodium in the Mechanism of Interaction of Sodium Silicate Melt with Aqueous Fluid: Evidence from 1H and 23Na NMR V. O. Zavel’sky and T. P. Salova p. 748
Compositional Evolution of Mesozoic Basalts in Northern Transbaikalia F. M. Stupak p. 755
Low-Temperature Oceanic Ferromanganese Mineral Deposition: The Formation of Chemical and Mineralogical Compositions and the Synthesis and Sorption Properties of Manganese Oxide–Hydroxides A. A. Morozov†, G. V. Novikov, and L. N. Kulikova p. 764
Geochemical Characteristics and Origin of Natural Gas in Southern Iran E. M. Galimov and A. R. Rabbani p. 780
Geochemical Features of Hydrocarbon Distribution in the Bottom Sediments of Andaman Basin (the Northeastern Part of the Indian Ocean) T. G. Chernova, Yu. I. Pikovskii, T. A. Alekseeva, and P. S. Rao p. 793
Modeling of Kerogen Formation with the Use of Phospholipid Liposomes S. I. Uskov, N. N. Rokosova, Yu. V. Rokosov, and N. V. Bodoev p. 805
Short Communications
Mantle Component in Proterozoic Granitoids: Evidence from He Isotopes in Rocks and Minerals V. R. Vetrin, I. L. Kamensky, and S. V. Ikorsky p. 814
Hydrogen Isotope Composition of Water Vapor in the Middle Stratosphere A. L. Devirts and B. I. Ogorodnikov p. 818
Rb–Sr Mixing Pseudoisochrons V. L. Andreichev p. 821
Redox Conditions of the Crystallization of Melilitic Rocks E. A. Chernysheva and O. Yu. Belozerova p. 824