Fig 4 - uploaded by Junji Yamamoto
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P-T phase diagram of CO2. Data of the equation of state for CO2 is after Pitzer and Sterner （1994） . Density contoured in g/cm 3 （i.e. isochors） . （a） P-T phase diagram of CO2 in the low-temperature and pressure range. Hexagons designate fluid inclusions. Circles in the hexagons are vapor bubbles. （b） P-T phase diagram of CO2 in the high temperature and pressure range.
Source publication
Mantle xenoliths provide snapshots of lithospheric mantle processes at the time of an eruption. Their fluid inclusions have the potential to enhance the resolution of images. Identifying major volatile compositions of fluid inclusions provides accurate figures for mantle fluid and various aspects of the lithospheric mantle. Fluid inclusions in mant...
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—Pyrolysis-free gas chromatography–mass spectrometry was used to determine the gas phase composition of inclusions in phenocrysts from basalts and rhyolites of Men’shii Brat Volcano (Medvezh’ya caldera, Iturup Island). Among more than 300 compounds detected in the inclusions, hydrocarbons are predominant (52–92 rel.%). These hydrocarbons (C1–C17) a...
Citations
... Obata (2015) suggests that analyzing this apparently strange and rare kind of rock will be useful for our understanding of earthquakes and related phenomena within the mantle. Yamamoto et al. (2015) review analyses of CO2rich fluid micro-inclusions in mantle minerals. Carbon dioxide is the most common species of carbon, which is important as a redox state indicator, in the upper mantle condition. ...
