Contents
Geochemistry International

Vol. 38, Suppl. 1, 2000

The supplement is published only in English by MAIK “Nauka / Interperiodica” (Russia).
Geochemistry International ISSN 0016-7029.

Preface p. 1

Tholeiitic Magmas within the Mid-Atlantic Ridge Segments at 25°–30° N:
Composition, Generation Conditions, and Relation to Modern Ore Formation

N. M. Sushchevskaya, V. S. Kamenetsky, K. G. Murav’ev, T. I. Tsekhonya,
G. A. Cherkashov, and B. V. Belyatsky p. 3  abstract

Sr–Nd–Pb Isotopic Zoning in the World Ocean and Mantle Plumes

Yu. V. Mironov, V. M. Rhyakhovskii, and A. A. Pustovoi p. 20  abstract

Hydromagmatophile and Rare Earth Elements in the Cretaceous–Paleogene Basaltoids
of the Verkhnyaya Kolyma Megadome

M. N. Zakharov, V. G. Ivanov, and O. Yu. Belozerova p. 28  abstract

Potassic Mafic Rocks with Megacrysts from the Northwestern Ladoga Lake Area (Karelia, Russia):
A Diversity of Mantle Sources of Potassic Rocks in the East of the Fennoscandian Shield

V. A. Kononova, V. A. Pervov, O. A. Bogatikov, K. S. Parsadanyan,
D. Z. Zhuravlev, and M. M. Arakelyants p. 39  abstract

REE Distribution in the Drusites of the Eastern Baltic Shield and Some Aspects
of the Early Proterozoic Geodynamics

E. N. Terekhov p. 59  abstract

The Malyi Murun Volcano-Plutonic Complex: An Example of Differentiated Mantle Magmas
of Lamproitic Type

N. V. Vladykin p. 73  abstract

Geochemistry and Petrology of the Ancient Vygozero Granitoids, Southeastern Karelia

S. B. Lobach-Zhuchenko, A. V. Kovalenko, I. N. Krylov, L. K. Levskii, and E. S. Bogomolov p. 84  abstract

The System Enstatite–Nepheline in Experiments at 6.5–13.5 GPa: The Importance
of Na₂Mg₂Si₂O₇ for the Melting of Nepheline-normative Mantle

V. Yu. Litvin, T. Gasparik, and Yu. A. Litvin p. 100  abstract

Primary Magmas of Mid-Ocean Ridges: Analysis of Experimental Modeling

V. K. Bulatov, A. V. Girnis, and G. P. Brey p. 108  abstract

Chemical Composition, Trace Elements, and Volatile Components
of Melt Inclusions in Minerals from Andesites of the Shiveluch Volcano, Kamchatka

M. L. Tolstykh, V. B. Naumov, A. D. Babanskii, S. A. Khubunaya, and N. N. Kononkova p. 123  abstract

Thermodynamic and Hydrodynamic Conditions of Gas and Heterophase Inclusion Formation
in Basic Igneous Rocks

V. N. Cherepanov, V. N. Sharapov, and V. K. Cherepanova p. 133  abstract

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