The bridgmanite–akimotoite–majorite triple point determined in large volume press and laser-heated diamond anvil cell

Britany L. Kulka, Jonathan D. Dolinschi, Kurt D. Leinenweber, Vitali B. Prakapenka, Sang Heon Shim

Research output: Contribution to journalArticle

Abstract

The bridgmanite–akimotoite–majorite (Bm–Ak–Mj or BAM) triple point in MgSiO3 has been measured in large-volume press (LVP; COMPRES 8/3 assembly) and laser-heated diamond anvil cell (LHDAC). For the LVP data, we calculated pressures from the calibration provided for the assembly. For the LHDAC data, we conducted in situ determination of pressure at high temperature using the Pt scale at synchrotron. The measured temperatures of the triple point are in good agreement between LVP and LHDAC at 1990–2000 K. However, the pressure for the triple point determined from the LVP is 3.9 ± 0.6 GPa lower than that from the LHDAC dataset. The BAM triple point determined through these experiments will provide an important reference point in the pressure–temperature space for future high-pressure experiments and will allow mineral physicists to compare the pressure–temperature conditions measured in these two different experimental methods.

Original languageEnglish (US)
Article number67
JournalMinerals
Volume10
Issue number1
DOIs
StatePublished - Jan 2020

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Keywords

  • Akimotoite
  • Bridgmanite
  • Large-volume press
  • Laser-heated diamond anvil cell
  • Majorite
  • Triple point

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Geology

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