Chromium and the genesis of diamond

Details Chromium and the genesis of diamond Chromium and the genesis of diamond

Jun 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975gecoa..39..929m&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 39, Issue 6-7, pp.929-936

Physics

5

Scientific paper

Several of the mineral inclusions that occur in natural diamond are major chromian phases, or contain unusually high chromium concentrations. Forsterite olivine inclusions contain ten times as much chromium as ordinary forsteritic olivine. Diopsides are commonly Cr-rich and some contain up to 12 wt.% Cr 2 O 3 . Chrome-pyrope garnets occur characteristically as inclusions in diamond and rarely in kimberlite. Chromite inclusions are the most magnesian and chromian of terrestrial chromites. Without further experimental studies of Cr-bearing systems at high pressure the significance of these observations remain somewhat enigmatic.

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