Melting of peridotite to 140 gigapascals

G. Fiquet, A. L. Auzende, J. Siebert, A. Corgne, H. Bureau, H. Ozawa, G. Garbarino

Research output: Contribution to journalArticle

187 Citations (Scopus)

Abstract

Interrogating physical processes that occur within the lowermost mantle is a key to understanding Earth's evolution and present-day inner composition. Among such processes, partial melting has been proposed to explain mantle regions with ultralow seismic velocities near the core-mantle boundary, but experimental validation at the appropriate temperature and pressure regimes remains challenging. Using laser-heated diamond anvil cells, we constructed the solidus curve of a natural fertile peridotite between 36 and 140 gigapascals. Melting at core-mantle boundary pressures occurs at 4180 ± 150 kelvin, which is a value that matches estimated mantle geotherms. Molten regions may therefore exist at the base of the present-day mantle. Melting phase relations and element partitioning data also show that these liquids could host many incompatible elements at the base of the mantle.

Original languageEnglish
Pages (from-to)1516-1518
Number of pages3
JournalScience
Volume329
Issue number5998
DOIs
Publication statusPublished - Sep 17 2010
Externally publishedYes

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Freezing
Physical Phenomena
Pressure
Diamond
Lasers
Temperature

ASJC Scopus subject areas

  • General

Cite this

Fiquet, G., Auzende, A. L., Siebert, J., Corgne, A., Bureau, H., Ozawa, H., & Garbarino, G. (2010). Melting of peridotite to 140 gigapascals. Science, 329(5998), 1516-1518. https://doi.org/10.1126/science.1192448

Melting of peridotite to 140 gigapascals. / Fiquet, G.; Auzende, A. L.; Siebert, J.; Corgne, A.; Bureau, H.; Ozawa, H.; Garbarino, G.

In: Science, Vol. 329, No. 5998, 17.09.2010, p. 1516-1518.

Research output: Contribution to journalArticle

Fiquet, G, Auzende, AL, Siebert, J, Corgne, A, Bureau, H, Ozawa, H & Garbarino, G 2010, 'Melting of peridotite to 140 gigapascals', Science, vol. 329, no. 5998, pp. 1516-1518. https://doi.org/10.1126/science.1192448
Fiquet G, Auzende AL, Siebert J, Corgne A, Bureau H, Ozawa H et al. Melting of peridotite to 140 gigapascals. Science. 2010 Sep 17;329(5998):1516-1518. https://doi.org/10.1126/science.1192448
Fiquet, G. ; Auzende, A. L. ; Siebert, J. ; Corgne, A. ; Bureau, H. ; Ozawa, H. ; Garbarino, G. / Melting of peridotite to 140 gigapascals. In: Science. 2010 ; Vol. 329, No. 5998. pp. 1516-1518.
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