Ni in chrome pyrope garnets

a new geothermometer

W. L. Griffin*, D. R. Cousens, C. G. Ryan, S. H. Sie, G. F. Suter

*Corresponding author for this work

Research output: Contribution to journalArticle

129 Citations (Scopus)

Abstract

Proton microprobe analyses of the minerals in garnet-peridotite xenoliths from kimberlites show that the partitioning of Ni between chrome pyrope garnet and olivine is strongly temperature(T)-dependent. The range of Ni contents in olivines is small relative to that in the analyzed garnets; a geothermometer therefore can be derived, based only on the Ni content of garnet. This allows estimation of T for single Cr-pyrope grains, such as the inclusions in diamonds, if these can be assumed to have equilibrated with olivine.

Original languageEnglish
Pages (from-to)199-202
Number of pages4
JournalContributions to Mineralogy and Petrology
Volume103
Issue number2
DOIs
Publication statusPublished - Oct 1989
Externally publishedYes

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