Contents
Geochemistry International

Vol. 37, No. 5, 1999

Simultaneous English language translation of the journal is available from “ / Interperiodica” (Russia).
Geochemistry International ISSN 0016-7029.

Silica Transport and Growth of High-Temperature Crystalline Quartz
in Supercritical Aqueous Fluids

V. S. Balitsky, L. V. Balitskaya, H. Ivasaki, and F. Ivasaki p. 391  abstract

Zinc Geochemistry at the Haemmerlein Skarn–Greisen Tin Deposit,
Erzgebirge, Germany

B. I. Malyshev, O. F. Mironova, V. B. Naumov, N. I. Savel’eva,
A. N. Salazkin, and A. G. Volosov p. 397  abstract

Chemical Evolution of Pyroxenes in Urals Gabbro:
The Role of Pressure, Temperature, Oxygen Fugacity, and Rock Composition

A. A. Efimov, T. A. Potapova, and D. G. Berlimble p. 404  abstract

Postcrystallization Alteration of Gold–Quartz Aggregates
under Hydrothermal Conditions: Experimental Data

M. S. Sakharova^†, S. K. Ryakhovskaya, and A. G. Turchkova p. 423  abstract

Gas–Liquid Phase Transition Volumes Changes in the CO₂–CH₄–N₂ System
in Relation to Thermobarogeochemistry Problems

V. G. Sverdlova, G. Yu. Shvedenkov, A. A. Tomilenko,
A. V. Savinov, and N. A. Gibsher p. 430  abstract

Experimental Investigation of Platinum Concentration
by Bitumen at 200–400°C and 1 kbar

L. P. Plyusnina and T. V. Kuz’mina p. 441  abstract

Organic Geochemistry of the Deep-Seated Triassic Sedimentary–Volcanogenic Deposits
of the Western Siberian Plate

I. D. Polyakova and G. Ch. Borukaev p. 450  abstract

Chlorine Dissolution in Fluid-rich Granitic Melts: The Effect of Calcium Addition

V. Yu. Chevychelov p. 456  abstract

Nature of Occurrence and Origin of the Barite at El-Gedida Iron Ore Mines,
Bahariya Oasis, Egypt

Ahmed A. Al-Boghdady and Mohamed M. Abu El-Hassan p. 468  abstract

Chromium(III) and Chromium(VI) Speciation in Seawater

V. S. Savenko and A. V. Savenko p. 481  abstract

Short Communications

The Nature of Ore-forming Solutions at Au–Ag Deposits in the United States
as Deduced from Isotopic Data

V. I. Ustinov and M. M. Konstantinov p. 488  abstract

In Memoriam

Malinin Sergei Dmitrievich (1929–1998) p. 491

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