| Project/Area Number |
23740341
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Solid earth and planetary physics
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| Research Institution | Kumamoto University |
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Principal Investigator |
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| Research Collaborator |
FUJII Satomu 熊本大学, 大学院・自然科学研究科, 大学院生
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| Project Period (FY) |
2011 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2011: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
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| Keywords | 古地磁気強度 / 火山岩 / 九重火山 / 富士火山 / 放射性炭素年代 / 宇宙線 / 地球磁場 / 阿蘇火山 |
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| Research Abstract |
During this funding period, a high-sensitivity magnetic balance for measuring a Curietemperature of rocks was purchased and the calibration and adjustment were completed.Using this system, a rock sample which is suitable for paleointensity measurement canbe recognized in the future paleointensity studies. Paleomagnetic sample was collectedat 13 sites of the Kuju volcanic field, and paleomagnetic directions with relatively highreliability were obtained from eight sites. In the Kuju volcanic field, the ages of lavaswere reported based on the relation with volcanic ash layers, and therefore the formationages of lava were not precisely determined. We recognized that these inaccuracies of theages of the lavas were not suitable for recovering the paleointenisty variation for thepast several thousand years. We noticed that we should not limit our sampling to the Kujuvolcanic field, but we should change the plan to collect samples from lavas andpyroclastic-flows for which carbon-14 ages have been reported. Paleointensitymeasurements are being conducted on these lavas and pyroclastic-flows.
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