Water in earth's lower mantle

Motohiko Murakami, Kei Hirose, Hisayoshi Yurimoto, Satoru Nakashima, Naoto Takafuji

Research output: Contribution to journalArticlepeer-review

164 Citations (Scopus)


Secondary ion mass spectrometry measurements show that Earth's representative lower mantle minerals synthesized in a natural peridotitic composition can dissolve considerable amounts of hydrogen. Both MgSiO3-rich perovskite and magnesiowüstite contain about 0.2 weight percent (wt%) H2O, and CaSiO3-rich perovskite contains about 0.4 wt% H2O. The OH absorption bands in Mg-perovskite and magnesiowüstite were also confirmed with the use of infrared microspectroscopic measurements. Earth's lower mantle may store about five times more H2O than the oceans.

Original languageEnglish
Pages (from-to)1885-1887
Number of pages3
Issue number5561
Publication statusPublished - 2002 Mar 8

ASJC Scopus subject areas

  • General


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