New EPMA technique using X-ray emission spectra to improve accuracy of the CHIME dating
| Project/Area Number |
24654174
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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 |
Petrology/Mineralogy/Science of ore deposit
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| Research Institution | Nagoya University |
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Principal Investigator |
KATO Takenori 名古屋大学, 年代測定総合研究センター, 准教授 (90293688)
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| Co-Investigator(Renkei-kenkyūsha) |
ENAMI Masaki 名古屋大学, 年代測定総合研究センター, 教授 (20168793)
SATO Kei 名古屋大学, 年代測定総合研究センター, 研究機関研究員 (80422533)
SUZUKI Kazuhiro 名古屋大学, 年代測定総合研究センター, 名誉教授 (90111624)
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| Research Collaborator |
CHO Deung-Lyong 韓國地質資源研究院, 国土地質研究本部, 先任研究員
JEEN Mi-Jung 釜山国立大学, 共同実験実習館, 助教
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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 |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Keywords | CHIME年代測定 / 電子プローブマイクロアナライザー（EPMA） / discrodance / エックス線分光分析 / 状態分析 / ジルコン / モナザイト / ウラン・トリウム・鉛 / 電子プローブマイクロアナライザー（ＥＰＭＡ） / discordance / 国際研究者交流（大韓民国） / EPMA / エックス線発光スペクトル / 結晶構造 / 岩石・鉱物・鉱床化学 / 国際情報交換（インド共和国） / 岩石・鉱物・鉱床学 |
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| Outline of Final Research Achievements |
New technique for detection of possibly discordant point on zircon and monazite was developed to improve accuracy of subgrain geochronology including CHIME dating, LA-ICP-MS and SIMS dating.
Electron probe microanalysis of Si and P can detect possible broken crystal structure of zircon and monazite. Broken crystal structure implies the possibility of Pb movement, which violates the assumption of U-Pb and U-Th-Pb dating. This new technique has been applied to zircon from India and Japan, and showed that non-destructive detection of broken crystal structure is available using electron probe microanalysis.
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Report
(4 results)
Research Products
(28 results)
