Flotation of Diamond in Mantle Melt at High Pressure

Details Flotation of Diamond in Mantle Melt at High Pressure Flotation of Diamond in Mantle Melt at High Pressure

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995sci...269..216s&link_type=abstract

Science, Volume 269, Issue 5221, pp. 216-218

Physics

18

Scientific paper

Experiments show that diamond floats in a primitive mantle melt at around 20 gigapascals and 2360^circC and in a melt formed by partial melting of the transition zone at about 16 gigapascals and 2270^circC. These observations constrain magma densities at high pressure. Diamond precipitated or trapped in a silicate melt at the base of the transition zone or the lower mantle floats and has been accumulating in the transition zone since early in Earth's history. Thus, the transition zone could be a reservoir of diamond.

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