| Project/Area Number |
21340165
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Geochemistry/Astrochemistry
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| Research Institution | Tohoku University (2010-2013)
Kyushu University (2009) |
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Principal Investigator |
NAKAMURA Tomoki 東北大学, 理学(系)研究科(研究院), 教授 (20260721)
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| Co-Investigator(Kenkyū-buntansha) |
NOGUCHI Takaaki 茨城大学, 理学部, 教授 (40222195)
関谷 実 九州大学, 理学研究院, 教授 (60202420)
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| Co-Investigator(Renkei-kenkyūsha) |
TUCHIYAMA Akira 京都大学, 大学院理学研究科, 教授 (90180017)
NAGAO Keisuke 東京大学, 大学院理学研究科, 教授 (40131619)
SEKIYA Minoru 九州大学, 大学院理学研究科, 教授 (60202420)
SANO Yuji 東京大学, 海洋研究所, 教授 (50162524)
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| Project Period (FY) |
2009-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥15,860,000 (Direct Cost: ¥12,200,000、Indirect Cost: ¥3,660,000)
Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2011: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2010: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2009: ¥8,970,000 (Direct Cost: ¥6,900,000、Indirect Cost: ¥2,070,000)
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| Keywords | 彗星塵 / ビルド第2彗星 / コンドリュール / スターダスト探査機 / スターダスト |
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| Research Abstract |
We have carried out mineralogical and isotopic analyses on cometary chondrules recovered by the Stardust mission. Both type-I and type-II chondrules are present in cometary chondrules. Oxygen isotopes show a wide range of composition. Some silicates in chondrules show 16O-rich composition close to the Sun, suggesting that they formed near the Sun. 26Al was not detected from plagioclase in a type-I chondrule, indicating that this cometary chondrule formed after the decay of most of 26Al and is younger than typical asteroidal chondrules.
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