Diamond formation from mantle carbonate fluids

Yu. N. Pal'yanov (), A. G. Sokol, Yu. M. Borzdov, A. F. Khokhryakov and N. V. Sobolev
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Yu. N. Pal'yanov: Institute of Mineralogy and Petrography, Siberian Branch of Russian Academy of Sciences
A. G. Sokol: Institute of Mineralogy and Petrography, Siberian Branch of Russian Academy of Sciences
Yu. M. Borzdov: Institute of Mineralogy and Petrography, Siberian Branch of Russian Academy of Sciences
A. F. Khokhryakov: Institute of Mineralogy and Petrography, Siberian Branch of Russian Academy of Sciences
N. V. Sobolev: Institute of Mineralogy and Petrography, Siberian Branch of Russian Academy of Sciences

Nature, 1999, vol. 400, issue 6743, 417-418

Abstract: Abstract Analysis of inclusions1 has shown that natural diamond forms at pressures of 5-6 GPa and temperatures in the range 900-1,400 °C. In non-metallic systems2,4, diamond has been synthesized only at pressures greater than 7 GPa and temperatures of more than 1,600 °C. We find that diamond can crystallize in alkaline carbonate-fluid melts at pressures and temperatures that correspond to those of natural diamond formation.

Date: 1999
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DOI: 10.1038/22678

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