The high-pressure synthesis of lawsonite in the MORB+H2O system

Kazuaki Okamoto, Shigenori Maruyama

Research output: Contribution to journalArticle

194 Citations (Scopus)

Abstract

Lawsonite is an important water reservoir in subducting oceanic crust below the amphibole dehydration depth ~70 km. To determine the maximum pressure stability of lawsonite in the MORB+H2O system, experiments were carried out using a 1000 ton uniaxial multi-anvil apparatus (SPI-1000). Mixtures of synthetic gel + 2wt% H2O were used for the starting materials with the average MORB composition. Experimental P-T conditions were T = 700-900 °C and P = 5.5-13.5 GPa. Run durations were 12 and 24 h. Lawsonite was synthesized stably up to 10 GPa and T <700 °C in the stishovite stability field, and

Original languageEnglish
Pages (from-to)362-373
Number of pages12
JournalAmerican Mineralogist
Volume84
Issue number3
Publication statusPublished - Mar 1999
Externally publishedYes

Fingerprint

lawsonite
mid-ocean ridge basalt
Amphibole Asbestos
stishovite
amphiboles
synthesis
anvils
Dehydration
dehydration
crusts
Gels
P-T conditions
gels
amphibole
oceanic crust
gel
Chemical analysis
water
Experiments
experiment

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

Okamoto, K., & Maruyama, S. (1999). The high-pressure synthesis of lawsonite in the MORB+H2O system. American Mineralogist, 84(3), 362-373.

The high-pressure synthesis of lawsonite in the MORB+H2O system. / Okamoto, Kazuaki; Maruyama, Shigenori.

In: American Mineralogist, Vol. 84, No. 3, 03.1999, p. 362-373.

Research output: Contribution to journalArticle

Okamoto, K & Maruyama, S 1999, 'The high-pressure synthesis of lawsonite in the MORB+H2O system', American Mineralogist, vol. 84, no. 3, pp. 362-373.
Okamoto, Kazuaki ; Maruyama, Shigenori. / The high-pressure synthesis of lawsonite in the MORB+H2O system. In: American Mineralogist. 1999 ; Vol. 84, No. 3. pp. 362-373.
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