Origin of diamonds in old enriched mantle

S. H. Richardson*, J. J. Gurney, A. J. Erlank, J. W. Harris

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

538 Citations (Scopus)


Sub-calcic garnets encapsulated by diamonds from relatively young (90 Myr) kimberlites in southern Africa, yield ancient Sm-Nd and Rb-Sr model ages (3,200-3,300 Myr). The chemistry and distribution of these and associated sub-calcic garnets from kimberlite concentrate, indicate diamonds formed following enrichment of residual sub-cratonic mantle such as that remaining after widespread extraction of 3,500-Myr komatiitic lavas.

Original languageEnglish
Pages (from-to)198-202
Number of pages5
Issue number5974
Publication statusPublished - 1984
Externally publishedYes


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