| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
It is still difficult to apply OSL dating to quartz grains from sediments in Japan because the quartz grains are derived from complex mixtures sources. In particular, the application of OSL dating to fluvial sediments is very limited. I therefore challenge to find out optimal OSL dating method to fluvial sediments in Japan. Research findings imply that generation of quartz fast component is based on the quartz origin and that the fast component is not generated by heating after erosion. In addition I measured quartz grains from fluvial terrace sediments along Kiso River, and its adequacy is considered in the correlation with intercalated maker tephra. The obtained OSL ages are about 40~50 ka. The OSL ages are corresponding to the tephra ages, but as far as we can foresee, being underestimated because the quartz samples were dominant by medium and slow component which is unsuitable for OSL dating.
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