Influence of Cr on REE Partitioning between Garnet and Silicate Melt : Application to Metasomatism of Mineral Inclusions in Diamonds
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Partitioning of REE between garnet and basaltic melt was performed at 7. 5GPa and 1900∼2090°C, considering the possible influence of Cr. It was confirmed that compatibility of light REE in Cr-bearing garnet increases significantly as comparing with that of Cr-free system, but no evident variation was detected for heavy REE. Based on the newly established partition coefficients, it is concluded that the light REE-enriched garnet inclusions in diamonds have not achieved equilibrium with metasomatic melts. Bulk mixing and subsequent recrystallization could be the main processes for the mineral inclusions in diamonds.
- The Review of High Pressure Science and Technology
The Review of High Pressure Science and Technology 7, 92-94, 1998
The Japan Society of High Pressure Science and Technology