Figure 4

Distribution of diamond occurrences through time. The occurrences of oceanic diamonds (dark blue diamonds)^13,14,16 and super deep diamonds (blue diamonds with white rims)^72,73 are plotted against the time distributions of diamondiferous kimberlites (dotted curve)⁷³, and oceanic (light blue) and continental (orange) mantle plume occurrences for the last 1200 million years³³ and the life cycles of supercontinents Pangea and Rodinia⁷⁴. Note that the majority of the known superdeep diamonds were brought up to the surface by 110–90 Ma kimberlites. The “Cullinan” (CLIPPIR) diamonds are from the much older Premier kimberlite (1153 Ma)⁷⁵.