| Item type |
会議発表論文 / Conference Paper(1) |
| 公開日 |
2015-03-26 |
| タイトル |
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タイトル |
The cooling rate of chondrules in Semarkona (LL 3.00) ordinary chondrite as inferred from Fe-Mg zoning of olivine |
|
言語 |
en |
| 言語 |
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|
言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_5794 |
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資源タイプ |
conference paper |
| アクセス権 |
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|
アクセス権 |
metadata only access |
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アクセス権URI |
http://purl.org/coar/access_right/c_14cb |
| 著者 |
宮本, 正道
三河内, 岳
Miyamoto, Masamichi
Mikochi, Takashi
Jones, R. H.
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| 著者所属 |
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東京大学大学院理学系研究科地球惑星科学専攻宇宙惑星科学講座 |
| 著者所属 |
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東京大学大学院理学系研究科地球惑星科学専攻宇宙惑星科学講座 |
| 著者所属（英） |
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en |
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Space and Planetary Science, Graduate School of Science, University of Tokyo |
| 著者所属（英） |
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en |
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Space and Planetary Science, Graduate School of Science, University of Tokyo |
| 著者所属（英） |
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en |
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Department of Earth and Planetary Sciences, University of New Mexico |
| 出版者 |
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出版者 |
宇宙航空研究開発機構宇宙科学研究本部 |
| 出版者（英） |
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出版者 |
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA) |
| 書誌情報 |
en : Proceedings of the ISAS lunar and planetary symposium
巻 41,
p. 155-158,
発行日 2009
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| 会議概要（会議名, 開催地, 会期, 主催者等）（英） |
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内容記述タイプ |
Other |
|
内容記述 |
The 41st ISAS Lunar and Planetary Symposium (August 6-8, 2008. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)) |
| 抄録（英） |
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内容記述タイプ |
Other |
|
内容記述 |
We developed a new model to calculate the cooling rate (or burial depth) by using the Fe-Mg chemical zoning profile of olivine considering diffusional modification during crystal growth, because chemical zoning provides information on thermal history of minerals. Although dynamic crystallization experiments are useful for estimating the cooling rate, experimental results only show the possibility of the cooling rate. It is, therefore, important to determine the cooling rate of actual olivines in rocks. We applied our model to calculating the cooling rate for olivines of type II porphyritic olivine chondrules in the Semarkona (LL 3.00) ordinary chondrite. The cooling rates show a wide range from 0.8 C/h to 2400 C/h for olivines in different chondrules. Although these results are broadly consistent with those obtained by dynamic crystallization experiments, the lower limit of the calculated cooling rate, 0.8 C/h, is about one order magnitude slower than experimental results. Our result suggests that each chondrule formed in different environmental conditions and assembled in Semarkona after chondrule formation. |
| 書誌レコードID |
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収録物識別子タイプ |
NCID |
|
収録物識別子 |
AA12268968 |
| 資料番号 |
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内容記述タイプ |
Other |
|
内容記述 |
資料番号: AA0064291036 |
