| Budget Amount *help |
¥43,030,000 (Direct Cost: ¥33,100,000、Indirect Cost: ¥9,930,000)
Fiscal Year 2016: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2014: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2013: ¥11,050,000 (Direct Cost: ¥8,500,000、Indirect Cost: ¥2,550,000)
Fiscal Year 2012: ¥19,630,000 (Direct Cost: ¥15,100,000、Indirect Cost: ¥4,530,000)
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| Outline of Final Research Achievements |
Paleoenvironmental signals can be withdrawn from isotopic compositions of archeological materials, such as bones and teeth of animals and humans. In this project, we aim to establish multi-isotope approach for such materials. A high temperature furnace system was newly installed for a He continuous flow isotope ratio mass spectrometer (CF-IR-MS) for the analysis of oxygen stable isotope compositions in solid samples, especially those of phosphate, sulfate and carbonate, whose isotope compositions are currently difficult to determine. We discusses the following catastrophic events as the triggers that can induce the catastrophic environmental perturbations; (a) massive volcanism, (b) impact of extraterrestrial material, and (c) variation of cosmic ray flux. We aim to establish stable isotope studies to infer such trigger events that may affect human migrations and civilizations.
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