Study of Chondrule Formation Processes: An Approach Combining Theoretical Calculations and Measurements of Shape, Composition, and Texture of Chondrules
| Project/Area Number |
24340102
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial 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 | Tokyo Institute of Technology |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
YOKOYAMA Tetsuya 東京工業大学, 大学院理工学研究科, 准教授 (00667028)
横山 哲也 東京工業大学, 理工学研究科, 准教授 (00467028)
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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 |
¥18,850,000 (Direct Cost: ¥14,500,000、Indirect Cost: ¥4,350,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2012: ¥15,210,000 (Direct Cost: ¥11,700,000、Indirect Cost: ¥3,510,000)
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| Keywords | コンドリュール / 成因 / 形状 / 組成 / 組織 / 惑星系形成 / 原始惑星系円盤 |
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| Outline of Final Research Achievements |
We have investigated the external shape and internal structure of chondrules contained in Allende meteorite, to reveal the chondrule formation mechanism. We measured about 100 chondrules and found 15 chondrules, which can be considered to be completely molten once. We compare the obtained relationship between the size and the shape of those chondrules with the theoretical relation that is obtained assuming the gas-frictional heating. Then, we have found that those two relations are consistent each other. This implies that the chondrules in Allende meteorite were exposed to the gas flow when they were molten.
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Report
(4 results)
Research Products
(20 results)
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[Journal Article] Theoretical Emission Spectra of Atmospheres of Hot Rocky Super-Earths2015
Author(s)
Ito, Y., Ikoma, M., Kawahara, H., Nagahara, H., Kawashima, Y., and Nakamoto, T.
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Journal Title
The Astrophysical Journal
Volume: 801
Issue: 2
Pages: 144-144
DOI
Related Report
Peer Reviewed / Acknowledgement Compliant
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[Journal Article] Near-infrared Brightness of Ganymede and Callisto Eclipsed in Jovian Shadow: A New Scope to Investigate Jovian Upper Atmosphere2014
Author(s)
Kohji Tsumura, Ko Arimatsu, Eiichi Egami, Yutaka Hayano, Chikatoshi Honda, Jun Kimura, Kiyoshi Kuramoto, Shuji Matsuura, Yosuke Minowa, Kensuke Nakajima, Taishi Nakamoto, Mai Shirahata, Jason Surace, Yasuto Takahashi, and Takehiko Wada
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Journal Title
Astrophysical Journal
Volume: 789
Issue: 2
Pages: 122-128
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Planetary-scale strontium isotopic heterogeneity and the age of volatile depletion of early solar system materials2012
Author(s)
Moynier, F., Day, J.M.D., Okui, W., Yokoyama, T., Bouvier, A., Walker, R.J. and Podosek, F.A.
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Journal Title
Astrophys
Volume: 758
Issue: 1
Pages: 45-51
DOI
Related Report
Peer Reviewed
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[Presentation] Three-Dimensional External Shape and Internal Structure of Chondrules in Allende CV3 Chondrite2014
Author(s)
Nakamoto, T., Takahashi, A. Tsuda, K. Nishida, W. Okui, T. Yokoyama, Y. Yanagida, S. Okumura, M. Nakamura, and O. Sasaki
Organizer
Annual Meeting of Meteoritical Society
Place of Presentation
モロッコ，カサブランカ
Year and Date
2014-09-08 – 2014-09-12
Related Report
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[Presentation] A Correlation among Shape, Composition, and Texture of Cosmic Spherules2012
Author(s)
Nakamoto, T., Doi, M., Nakamura, T., and Yamauchi, Y.
Organizer
European Geosciences Union
Place of Presentation
ウィーン,オーストリア
Year and Date
2012-04-27
Related Report
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