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LOW-PRESSURE CRYSTALLIZATION [1 record]

Record 1 2008-07-10

English

Subject field(s)
  • Mineralogy
CONT

Low-pressure crystallization: At 1 atm [atmosphere],the first phase to crystallize is Cr-rich spinel, immediately followed by olivine. Olivine and Cr-rich spinel cocrystallize until about 25 weight percent (about 20 volume %) olivine is formed, then plagioclase and pigeonite join the crystallizing assemblage. Experimental results thus suggest that low-pressure crystallization will lead to early crystallization of about 20 volume % of olivine phenocrysts before crystallization of a pyroxene + plagioclase + olivine groundmass.

OBS

low-pressure crystallization: term used at Natural Resources Canada - Earth Sciences Sector.

Key term(s)
  • cristallisation at low pressure

French

Domaine(s)
  • Minéralogie
CONT

La cristallisation à faible pression est contrôlée par l'exsolution de l'eau dans la phase gazeuse.

OBS

cristallisation à faible pression : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

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