Contents

Geochemistry International

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Vol. 64, No. 2, 2026

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Age of Magmatic and Metasomatic Rocks of Kekura Gold Deposit, Western Chukotka, Russia: Evidence from U–Pb and Rb–Sr Isotope Data

E. V. Nagornaya, M. O. Anosova, I. A. Baksheev, Yu. A. Kostitsyn, and V. O. Yapaskurt p. 79  abstract

The Systems CaSiO₃–CaF₂ and Ca_0.5Mg_0.5SiO₃–CaF₂ at 6 GPa

A. Shatskiy, A. V. Kovalenko, Yu. G. Vinogradova, D. V. Shatskaya, K. M. Stepanov, D. E. Sidko, G. N. Ovsyannikov, C. A. Lorenz, and M. A. Nikitin p. 92  abstract

Experimental Study of RbAlSi₃O₈–BaAl₂Si₂O₈ Solid Solutions: Cation-Exchange Equilibria with Fluid

A. R. Kotelnikov, N. I. Suk, Z. A. Kotelnikova, G. M. Akhmedzhanova, and N. A. Drozhzhina p. 101  abstract

Multi-Stage Formation of Apatite in the Early Proterozoic Metagabbroids of the Velimyaki Massif (the Northern Ladoga Region)

R. L. Anisimov, Sh. K. Baltybaev, I. M. Vasilyeva, N. G. Rizvanova, O. L. Galankina, and V. M. Savatenkov p. 113  abstract

Hydrochemical Interpretation of Kangding Geothermal System Formation Mechanism, Sichuan, China

Haiying Huang, Jiexiang Li, Shuang Liu, and Hankun Li p. 128  abstract

Oils from the Upper Devonian–Carboniferous Reservoirs of the Bayandy Oilfield in the Denisov Trough, Timan–Pechora Province: Biomarkers, Carbon Isotope Composition, and Potential Generation Sources

I. S. Kotik, A. D. Saetgaraev, D. A. Bushnev, O. V. Valyaeva, O. S. Kotik, A. A. Savelyeva, and D. S. Melnik p. 148  abstract

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