2017 Fiscal Year Final Research Report
Distribution of REE and actinide in zirconolite, and application for geochronology
| Project/Area Number |
15K05343
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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 |
Petrology/Mineralogy/Economic geology
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| Research Institution | Yamaguchi University |
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Principal Investigator |
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Keywords | 岩石・鉱物・鉱床学 / ジルコノライト / 年代学 / REE / 南極大陸 / カソードルミネッセンス / 核廃棄物処理 |
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| Outline of Final Research Achievements |
I found zirconolite from Sor-Rondane Mountains, Antarctica. This zirconolite intimately occurs with baddeleyite and corundum. Cathode-luminescence (CL) image is important to study for such minerals. I made an original CL port for such mineral. Now the CL detector and EDS detector can use at the same time.
The ideal chemical formula of zirconolite is CaZrTi2O7. However, this zirconolite contains significant Y, REE, U, and Th. Combination of cation exchange of plural sites has been revealed for such chemical composition. These are mainly "Ca-REE" exchange and "Ti-(Fe, Mg)" exchange. CHIME-age of the zirconolite was 528Ma. Zirconolite can use as a chronometer.
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| Free Research Field |
岩石学
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