| Budget Amount *help |
¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000)
Fiscal Year 2014: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2013: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2012: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
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| Outline of Final Research Achievements |
1) The inclusions in the Ichinomegata amphibole bearing spinel plagioclase lherzolite xenoliths were found to be composed mainly of CO2-H2O-Cl-S fluids. The salinity of fluid inclusions is 3.7±0.8 wt% NaCl equivalent. The salinity of aqueous fluid inclusions in jadeite-rich rocks in supra subduction zone is 4.3 wt% NaCl equivalent.
2) Partitioning of large ion lithophile elements between aqueous fluids and melts was measured using in-situ synchrotron x-ray fluorescence (XRF) from aqueous fluids and silicate melts at high-temperature and high-pressure conditions. We found a positive correlation between partition coefficients and pressure, as well as between partition coefficients and salinity. Enrichment of large ion lithophile elements in arc basalts relative to mid oceanic ridge basalts has been attributed to the mantle source fertilization by aqueous fluids from dehydrating oceanic plate. Such aqueous fluids are likely to contain Cl, although their amount remains to be quantified.
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