Melting phase relations of klb-1 peridotite and mid-ocean ridge basalt and gravitational stabilities of partical silicate melts at the uppermost lower mantle

Hideharu Kuwahara, Ryuichi Nomura, Ryoichi Nakada, Tetsuo Irifune

Research output: Contribution to journalArticlepeer-review

Abstract

Melting phase relations of mantle peridotite and basaltic oceanic crust are essentially important for understanding the chemical evolution of the Earth`s mantle. Here we discuss melting phase relations of KLB-1 peridotite and mid-ocean ridge basalt (MORB) at the uppermost lower mantle based on our recent experimental results. The results show the narrow solidus-liquidus interval within 200 K and that MORB has lower solidus temperature than KLB-1 peridotite at 27 GPa. We also estimated the density of partial silicate melts at high pressures and found that partial melts of KLB-1 peridotite may be gravitationally unstable at the uppermost lower mantle conditions, whereas partial melts of MORB may be stable. This suggests that the distribution of partial melts at the deep Earth`s mantle is different between KLB-1 peridotite and MORB.

Original languageEnglish
Pages (from-to)75-85
Number of pages11
JournalReview of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu
Volume29
Issue number2
DOIs
Publication statusPublished - 2019
Externally publishedYes

Keywords

  • Density
  • Melting phase relation
  • Silicate melt
  • Uppermost lower mantle

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Melting phase relations of klb-1 peridotite and mid-ocean ridge basalt and gravitational stabilities of partical silicate melts at the uppermost lower mantle'. Together they form a unique fingerprint.

Cite this