Item type |
紀要論文(ELS) / Departmental Bulletin Paper(1) |
公開日 |
2005-03-01 |
タイトル |
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タイトル |
Rb-Sr and Sm-Nd dating of olivine-phyric shergottite Yamato 980459: Petrogenesis of depleted shergottites |
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言語 |
eng |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Yamato 980459, Rb-Sr, Sm-Nd, age, petrogenesis, nakhlite, depleted shergottite |
資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
departmental bulletin paper |
ID登録 |
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ID登録 |
10.15094/00006064 |
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ID登録タイプ |
JaLC |
ページ属性 |
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内容記述タイプ |
Other |
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内容記述 |
P(論文) |
論文名よみ |
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その他のタイトル |
Rb-Sr and Sm-Nd dating of olivine-phyric shergottite Yamato 980459: Petrogenesis of depleted shergottites |
著者名(英) |
Shih,Chi-Yu
Nyquist,Laurence E.
Wiesmann,Henry
Reese,Young
Misawa,Keiji
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著者所属(英) |
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en |
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Lockheed-Martin Space Operations/KR, NASA Johnson Space Center/Lockheed-Martin Space Operations/Mail Code C-23, Hernandez Engineering Co./Antarctic Meteorite Research Center, National Institute of Polar Research |
抄録(英) |
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内容記述タイプ |
Other |
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内容記述 |
Martian meteorite Yamato (Y) 980459 has undergone terrestrial weathering in Antarctica. The weathering has affected the Sm-Nd isotopic system. Acid-washed pyroxenes, whole rock and quenched glass samples define a Sm-Nd isochron age of 472±47 (±2σ) Ma and a high initial εNd value of +36.9±2.2 (±2σ). Both values are indisguishable from those reported for the other olivine-phyric depleted shergottite DaG 476. The Rb-Sr system of Y980459 shows even more terrestrial disturbance. The same acid-washed samples, which have a narrow Rb/Sr variation of only~10%, do not yield an Rb-Sr isochron. However, the weighted average of nine samples yields a good initial ^(87)Sr/^(86)Sr ratio value of 0.701384±0.000021 (±2σ) at 472Ma. This value is only slightly higher, by 1-2 ε-units, than that estimated from plagioclase data for DaG 476. Calculations for a two-stage model for Sr and Nd isotopic evolution indicate that Y980459 came from a depleted mantle reservoir with ^(147)Sm/^(144)Nd=~0.266 and ^(87)Rb/^(86)Sr=~0.04, similar to the DaG 476 source. A three-stage model calculation suggests that the REE abundances and Nd isotopic systematics of Y980459 could be produced by partial melting of high ^(147)Sm/^(144)Nd garnet-rich residues which were formed after the extraction of LREE-rich, nakhlite-like melts from a postulated garnet-clinopyroxene-olivine source having ^(147)Sm/^(144)Nd=~0.235. |
雑誌書誌ID |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA11182426 |
書誌情報 |
Antarctic meteorite research
巻 18,
p. 46-65,
発行日 2005-03
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出版者 |
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出版者 |
National Institute of Polar Research |