Fig. 5: Relationship between lithospheric thickness and diamond grades in kimberlites worldwide relative to olivine composition.
From: Diamond preservation in the lithospheric mantle recorded by olivine in kimberlites
Olivine lamproites from South Africa and India are again included. The error bars represent 10% of the reported value for diamond grades and 10 km for lithospheric thickness. The kimberlites are colour-coded based on olivine Mg# score (see Methods). Note that low grades (<20 cpht) occur in regions with lithosphere thinner than 200 km, regardless of olivine Mg#, and where thick lithosphere (≥200 km) is associated with a low olivine-Mg# score. Conversely, thick lithosphere and high-Mg# olivine are generally associated with high diamond grades (>50 cpht) with some exceptions.
