The Component Composition of Fluid Phase during Crystallization of Subcalcic Chromium Garnet at High Pressure

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The paper presents the results of experimental modeling of the crystallization conditions of subcalcic Cr-rich garnets in the serpentine – chromite – carbonatite system at a pressure of 5 GPa and a temperature of 1300°C. In the experiments, a mineral association of highly magnesian olivine and orthopyroxene, garnet and chrome-spinel was formed. It has been established that subcalcic Cr-pyrope can crystallize in the form of metacrystals during metasomatism as a result of infiltration of the fluid phase. In the presence of graphite, the fluid phase has a complex composition with predominance of hydrocarbons and oxygen-, nitrogen-, and sulfur-containing organic compounds with minor amount of inorganic gases, including CO2 and H2O.

作者简介

A. Chepurov

V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences

Email: achepurov@igm.nsc.ru
Novosibirsk, Russia

A. Tomilenko

V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences

Novosibirsk, Russia

V. Lin

V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences

Novosibirsk, Russia

V. Sonin

V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences

Novosibirsk, Russia

E. Zhimulev

V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences

Novosibirsk, Russia

T. Bul’bak

V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences

Novosibirsk, Russia

A. Chepurov

V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences

Novosibirsk, Russia

N. Pokhilenko

V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences

Novosibirsk, Russia

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