| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Outline of Final Research Achievements |
In this study I dissolved altered corals by hydrochloric acid and investigate characteristics of luminescence signals from the residual materials to discuss possibilities for an elevated-temperature infrared stimulated luminescence (pIRIR; post-IR IRSL) dating.
The insoluble residual materials in coral fossils taken from Miyako and Yonaguni Island, southwestern Ryukyus, southwestern Japan , the grain size of which is less than ca. 100 micron meter, show BLSL and IRSL signals. I could get an age constrain from the fossil coral using residual materials after the acid treatment, indicating that fossil coral sometimes contains a certain amount of minerals like quartz and feldspar. I think post-IR IRSL dating of the residual materials from fossil coral after acid treatment gives us a great possibility to date altered fossil coral.
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