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Chondrule age distribution and rate of heating events for chondrule formation
https://doi.org/10.15094/00006077
https://doi.org/10.15094/0000607794315dca-dc50-4df7-bb61-e1f94c442396
名前 / ファイル | ライセンス | アクション |
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KJ00002499489 (1.5 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 2005-03-01 | |||||
タイトル | ||||||
タイトル | Chondrule age distribution and rate of heating events for chondrule formation | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | chondrules, origin, solar system, solar nebula, thermal histories | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.15094/00006077 | |||||
ID登録タイプ | JaLC | |||||
ページ属性 | ||||||
内容記述タイプ | Other | |||||
内容記述 | P(論文) | |||||
論文名よみ | ||||||
その他のタイトル | Chondrule age distribution and rate of heating events for chondrule formation | |||||
著者名(英) |
Nakamoto,Taishi
× Nakamoto,Taishi× Kita,Noriko T.× Tachibana,Shogo |
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著者所属(英) | ||||||
en | ||||||
University of Tsukuba, Center for Computational Sciences/Department of Geology and Geophysics, University of Wisconsin/University of Tokyo, Department of Earth and Planetary Science | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Chondrules are considered to be formed by flash heating events in the protoplanetary disk. In order to evaluate some basic factors in the heating mechanism, we examined the rate of heating events that explains the abundance and the observed age distribution of chondrules in unequilibrated ordinary chondrites. First, we compiled the literature data of ^(26)Al ages of chondrules from the least equilibrated ordinary chondrites (LL3.0-3.1), ranging from 1Myr to 3Myr with a peak at about 1.8Myr relative to the formation time of Ca, Al-rich inclusions (CAIs) in carbonaceous chondrites, the oldest solid materials formed in the solar system. Next, we made a simple phenomenological chondrule formation model assuming that each event heated only a small fraction of existing dust at one time and numerous heating events produced chondrules. Results indicate that (1) an average number of heating events experienced by a dust particle should be 1.2 or higher, (2) more than a half of the present chondrules were reheated, (3) chondrule formation started sometime between 0.4-1.5Myr and ended at 2.2-2.3Myr after the CAI formation, and (4) the rate of heating events has a peak at 0.1-0.8Myr earlier than the peak of the observed chondrule age distribution and should decrease monotonically with time after the peak. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA11182426 | |||||
書誌情報 |
Antarctic meteorite research 巻 18, p. 253-272, 発行日 2005-03 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |