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U-Th-Pb isotopic systematics of lherzolitic shergottite Yamato-793605
https://doi.org/10.15094/00005890
https://doi.org/10.15094/00005890147269d3-47bc-4590-984c-0e3456e1626a
名前 / ファイル | ライセンス | アクション |
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KJ00000040882 (2.1 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 1997-09-01 | |||||
タイトル | ||||||
タイトル | U-Th-Pb isotopic systematics of lherzolitic shergottite Yamato-793605 | |||||
言語 | ||||||
言語 | eng | |||||
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 | 10.15094/00005890 | |||||
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) | |||||
著者名(英) |
Misawa,Keiji
× Misawa,Keiji× Nakamura,Noboru× Premo, Wayne R.× Tatsumoto,Mitsunobu |
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著者所属(英) | ||||||
en | ||||||
Department of Earth & Planetary Sciences, Faculty of Science, and Division of the Nature of the Earth, The Graduate School of Science and Technology, Kobe University/Department of Earth & Planetary Sciences, Faculty of Science, and Division of the Nature of the Earth, The Graduate School of Science and Technology, Kobe University/U.S. Geological Survey/U.S. Geological Survey | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | We have undertaken U-Th-Pb isotopic studies on lherzolitic shergottite, Yamato-793605. Four mineral separates (olivine, plagioclase, and two phases of pyroxene) and a whole-rock sample were leached with dilute acid in order to remove secondary Pb contamination. However, preferential leaching of U and Th over Pb occurred. The Pb isotopic data points of five residue fractions scattered, and a calculated Pb-Pb age does not clearly indicate either crystallization from a melt or a later disturbance to the U-Pb system, in contrast with other shergottites. The chord through U-Pb data points for pyroxene (PXl) leaches and residue intersects concordia at 4439±9 Ma and 212±62 Ma, suggesting a young disturbance event resulting in Pb loss. The later disturbance event partially reset the U-Pb system. The estimated ^<238>U/^<204>Pb (≡μ) value from the whole-rock residue for the source of Y-793605 is about 5,suggesting that Y-793605 was derived from a volatile-rich source environment and confirms a low-μ source for shergottites compared to volcanic rocks of the Earth. | |||||
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 10, p. 95-108, 発行日 1997-09 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |