| Project/Area Number |
24540455
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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 |
Solid earth and planetary physics
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| Research Institution | Kochi University |
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Principal Investigator |
KODAMA Kazuto 高知大学, 自然科学系, 教授 (00153560)
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| Co-Investigator(Kenkyū-buntansha) |
YAMOTO Yuhji 高知大学, 自然科学系, 助教 (00452699)
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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 |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | 岩石磁気 / 環境磁気 / ナノ粒子 / 気候変動 / 交流磁化率 / 周波数スペクトル / ナノ磁性粒子 / 粒子サイズ / 地球環境 |
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| Outline of Final Research Achievements |
Broad-band magnetic susceptibility (MS) measurement, a novel magnetic method capable ofquantifying a narrow grain size distribution (GSD) of superparamagnetic (SP) particles by measuring low-field MS at a number of frequency steps spanning four orders of magnitude, has been developed and tested in a loess/palaeosol section at Luochuan in the Chinese Loess Plateau. The
studied succession consists of sequences from the latest palaeosol unit (S0) to the upper part of the loess unit (L2), spanning the last glacial-interglacial cycle. Results indicate that the mean volume of SP particles in this loess/palaeosol sequence tends to increase during the transition from loess→weak palaeosol→palaeosol, an indication of grain growth as pedogenesis progresses.
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