Open AccessExperimental study of formation of chromian priderite and yimengite as products of modal mantle metasomatism
Author(s) -
V. G. Butvina,
S. S. Vorobey,
O. G. Safonov,
D. A. Varlamov,
Г. В. Бондаренко,
Yu. B. Shapovalov
Publication year - 2019
Publication title -
doklady akademii nauk. rossijskaâ akademiâ nauk
Language(s) - English
Resource type - Journals
ISSN - 0869-5652
DOI - 10.31857/s0869-56524866709-713
Subject(s) - metasomatism , peridotite , ilmenite , mantle (geology) , chromite , geochemistry , geology , silicate , rutile , spinel , olivine , carbonate , mineralogy , chemistry , materials science , metallurgy , paleontology , organic chemistry
The article presents the data of a series of experiments on the synthesis of exotic titanates (priderite and yimengite) as a result of the reproduction of metasomatic conditions of transformation of mantle minerals (chromite, ilmenite). It was first synthesized chromian priderite not containing Ba. The experiments showed the possibility of crystallization of this mineral as a reaction product of high-chromium spinel and rutile with potassium aqueous carbonate fluid (melt) in the upper mantle. In particular, the obtained experimental data allow us to interpret the relationship between K-Cr-priderite and carbonate-silicate inclusions in chromites of Bohemian garnet peridotites. In the experimental study of the reaction of chromite and ilmenite with aqueous potassium-carbonate fluid (melt) obtained both phases of titanates (priderite and yimengite) - indicator minerals, mantle metasomatism, which directly confirms the possibility of formation of yimengite and K-Cr-priderite and other titanates, the result of mantle metasomatism of upper mantle peridotite under conditions of the highest activity of potassium.