| Project/Area Number |
20510009
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Kyoto University |
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Principal Investigator |
OHSAWA Shinji Kyoto University, 大学院・理学研究科, 教授 (30243009)
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| Research Collaborator |
MISHIMA Taketoshi 京都大学, 大学院・理学研究科, 大学院生(博士課程)
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| Project Period (FY) |
2008 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2010: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2009: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2008: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | 鍾乳石 / 縞模様 / 茶色 / 白色 / 方解石 / 滴下水 / 洞内河川 / 懸濁物 / 水没 / 洪水 / 成長 / 過飽和度 |
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| Research Abstract |
We have investigated for reconstructing paleoclimatic change through the internal brown pinstripes of speleothem, and obtained useful basic information as follows. (1) The cause materials for brown stripes are humus mainly consisting of humin and fluvic acid with colored minerals such as magnetite, augite and they are derived from brownish suspension of river water flowing in the cave. (2) The brown stripes will be inserted when the stalagmite is submerged in the cave river in case of flood. (3) The speleothem growth has a seasonal variation according to degree of oversaturation for speleothem calcite and flow rate of drip water.
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