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lamproite magmas and thereby obtaining a direct indication of the potential for resorption of diamonds. In this contribution, we present the results of detailed chemical analysis of perovskite in kimberlite and lamproite samples from several localities in southern Africa, Russia and Australia. Oxygen fugacity is estimated using the perovskite oxygen barometer and is compared to estimates of resorption based on diamond population studies. The results of this work are used to evaluate the general applicability of the perovskite oxygen barometer to kimberlites and lamproites worldwide and to further constrain relationships between the oxygen fugacity of the magma and the degree of diamond resorption. Samples and methods

Iron-in-perovskite oxygen barometry and diamond resorption in kimberlites and lamproites from southern Africa, Russia and Australia