Nature research paper: Rift-induced disruption of cratonic keels drives kimberlite volcanism
, for kimberlites younger than 250 Ma; note that kimberlites predominantly occur on lithosphere >150 km thick., Estimation of migration rate using distance and time lag from continental breakup for African kimberlite clusters, using standard linear regression and Theil–Sen regression. A Monte Carlo simulation was performed to capture uncertainty in kimberlite age, breakup age and rift distance .
Extended Data Fig. 4 Minimum distances and time lags of kimberlite eruptions relative to continental boundaries. Probability density plots for two endmember rift association models, associating kimberlites with the rift section with either the minimum lag or the minimum distance . This provides an estimate of the upper and lower bounds of the migration rate, for each kimberlite or cluster. Uncertainty in kimberlite age, breakup age and rift distance is accounted for by Monte Carlo simulation . Results are presented for all three locations combined.
Extended Data Fig. 5 Temporal distribution of kimberlites in North America relative to continental breakup. Histograms showing the distribution of lags for kimberlite clusters in North America, focusing on kimberlites closest to rift sections, using the original dataset and shown as a normalized histogram incorporating uncertainty in kimberlite age, breakup age and rift distance . Using the clustering method , we obtain a total of 65 clusters. Peaks occur around 55–25 Myr before breakup and 35–75 Myr post-breakup.
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