Compositional variability of pyrope in kimberlites at high pressures and temperatures

Magnesian garnet (pyrope) is a typical indicator mineral of kimberlites and provides important information on the genesis of mantle mineral assemblages. The very first review and genetic types of garnet in kimberlites and peridotites has revealed a distinguishing compositional trait of the pyrope fr...

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Published inGeochemistry international Vol. 53; no. 1; pp. 78 - 82
Main Authors Chepurov, A. A., Turkin, A. I.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.01.2015
Springer Nature B.V
Subjects
Crystals
Earth and Environmental Science
Earth Sciences
Geochemistry
Minerals
Short Communications
reaction rim
garnet
pyrope
high pressure
high temperature
kimberlite
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Summary:Magnesian garnet (pyrope) is a typical indicator mineral of kimberlites and provides important information on the genesis of mantle mineral assemblages. The very first review and genetic types of garnet in kimberlites and peridotites has revealed a distinguishing compositional trait of the pyrope from the greatest depths: this pyrope has elevated Cr and relatively low Ca concentrations. Later Ca and Cr proportions in mantle garnets were utilized as the basis for one of the currently most important criteria of the possible diamond potential of kimberlites.
ISSN:0016-7029
1556-1968
DOI:10.1134/S0016702914110020