Non-destructive magnetic detection of volcanic ash in ice cores with SQUID gradiometer
| Project/Area Number |
24654166
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Geology
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| Research Institution | National Institute of Advanced Industrial Science and Technology |
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Principal Investigator |
ODA Hirokuni 独立行政法人産業技術総合研究所, 地質情報研究部門, 主任研究員 (90356725)
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| Co-Investigator(Kenkyū-buntansha) |
KAWAI Jun 金沢工業大学, 先端電子技術応用研究所, 教授 (10468978)
SUGANUMA Yusuke 国立極地研究所, 教育研究系, 助教 (70431898)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | SQUIDグラジオメータ / 火山灰 / 南極 / 磁性鉱物 / 非破壊検出 / 氷 / 雪 / 残留磁化 / 岩石磁気 / 阿蘇火山 / 氷床コア / 非破壊測定 / 人工磁化 |
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| Outline of Final Research Achievements |
Indentification of volcanic ash layers in ice cores are important in providing time markers for comparison among multiple ice cores and in recognizing large volcanic eruptions that lead to global climate change.In this study, we pursued to develop non-destructive magnetic detection method of thin volcanic ash layers in ice cores. However, the difficulties in accessing to drilled ice cores and using low temperature room, our experiments were limited to modeled cores, Antarctic ice and snow samples with volcanic ashes. For modeled cores, volcanic ashes from Sakurajima and Aso volcanoes and Tiva Canyon tuff were measured. As a real ice sample, Antarctic ice collected from Nansen Ice Field was used while cooling with liquid nitrogen. As a real deposited volcanic ash, snow cores were collected 50km south of Aso volcano in Feb. 2015 during the time of active ash falls after Nov., 2014.
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Report
(4 results)
Research Products
(7 results)
