| Project/Area Number |
23501250
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Geography
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| Research Institution | Hosei University |
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Principal Investigator |
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| Research Collaborator |
LAUZITZEN Stein-erik Bergen University, Depertment of Earth Sciences, Professor
SLABE Tadej Karst Institute Slovenian Academy of Science, Head of Karst Institut
KNEZ Martin Karst Institute Slovenian Academy of Science, Reseacher, Karst Institut
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2011: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | 南大東島 / カルスト化過程 / ドロマイト / 溶食率 / カルスト地形 / 鍾乳洞 / 化石土壌 / ライムストーンウオール / 国際研究者交流 / 南西諸島 / 年代測定 / 鍾乳石 / カルスト化 |
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| Research Abstract |
Modeling of Karstification in Minamidaito Island was made. Using solution rate of limestone tablets, following results were obtained:
Present terrain as karstified atoll has been formed during the age of about 1.6Ma.. Result of the dating speleothems showed that lowering of caves at the bottom basin of Minamidaito Island has begun after the years of 100ka. According to the vadose speleothems and the result of borehole studies, lowest sea level was -100m, in the Last Glacial Period. So, it is considered that caves were formed also until -100m a.s.l., in the same period.
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