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Kimberlites from Source to Surface: Insights from Experiments

Foley, Stephen; Yaxley, Greg; Kjarsgaard, Bruce A.


High-pressure experiments are unconvincing in explaining kimberlites as direct melts of carbonated peridotite because the appropriate minerals do not coexist stably at the kimberlite liquidus. High-pressure melts of peridotite with CO2 and H2O have compositions similar to kimberlites only at pressures where conditions are insufficiently oxidizing to stabilize CO2: they do not replicate the high K2O/Na2O of kimberlites. Kimberlite melts may begin their ascent at ≈300 km depth in reduced...[Show more]

CollectionsANU Research Publications
Date published: 2019
Type: Journal article
Source: Elements
DOI: 10.2138/gselements.15.6.393


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