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Science 27 February 1976:
Vol. 191. no. 4229, pp. 849 - 851
DOI: 10.1126/science.191.4229.849
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Articles

Mineral Inclusions in Diamond: Temperature and Pressure of Equilibration

HENRY O. A. MEYER 1 and HSIAO-MING TSAI 1

1 Department of Geosciences, Purdue University, West Lafayette, Indiana 47907

Two distinct suites of minerals included in natural diamond occur and probably represent different physical and chemical conditions during diamond growth. Minerals of the ultramafic suite appear to have equilibrated in the range 1000° to 1300°C between 45 and 65 kilobars, whereas the temperature range for minerals of the eclogitic suite is 850° to 1250°C. At present, models relating the partitioning of magnesium and iron between coexisting phases are not sufficiently rigorous to determine a value for the pressure of equilibration of these eclogitic suite inclusions.

Submitted on December 23, 1975


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
THE PRESSURES AND TEMPERATURES OF FORMATION OF DIAMOND BASED ON THERMOBAROMETRY OF CHROMIAN DIOPSIDE INCLUSIONS.
P. Nimis (2002)
Can Mineral 40, 871-884
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Science. ISSN 0036-8075 (print), 1095-9203 (online)