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Did diamond-bearing orangeites originate from MARID-veined peridotites in the lithospheric mantle?

by User Not Found | Apr 22, 2015
The CET’s very own Associate Professor Marco Fiorentini, along with his fellow researchers, attempted to answer this question with the final result published recently in Nature Communications (April 2015).
The CET’s very own Associate Professor Marco Fiorentini, along with his fellow researchers, attempted to answer this question with the final result published recently in Nature Communications (April 2015).
 
Giuliani, Phillips, et al reported new data for two MARID xenoliths from the Bultfontein kimberlite (Kimberley, South Africa) and they showed that MARID-veined mantle has mineralogical (carbonate-apatite) and geochemical (Sr-Nd-Hf-O isotopes) characteristics compatible with orangeite melt generation from a MARID-rich source. This interpretation is supported by U-Pb zircon ages in MARID xenoliths from the Kimberley kimberlites, which confirm MARID rock formation before orangeite magmatism in the area.

Please click here for the full article.

Please click here for the Australia's Mining Monthly article

Please click here for the Mining.com article