2015 Fiscal Year Final Research Report
Water-rock interaction on martian surface deduced from calcium isotopic composition of alteration products in nakhlites
| Project/Area Number |
26610185
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Geochemistry/Cosmochemistry
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| Research Institution | National Institute of Polar Research |
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Principal Investigator |
Misawa Keiji 国立極地研究所, 研究教育系, 准教授 (70212230)
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| Co-Investigator(Kenkyū-buntansha) |
Yoneda Shigekazu 国立科学博物館, 理工学研究部, グループ長 (60210788)
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Keywords | カルシウム / ストロンチウム / 安定同位体 / ダブルスパイク |
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| Outline of Final Research Achievements |
To better understand alteration and weathering effects on the planetary surface, we measured Ca isotopic compositions of planetary materials along with preparation of Sr-84, -87 double spike (DS) to obtain stable Sr isotopic fractionation of alteration materials. We have obtained primitive Ca isotopic compositions from a whole-rock sample of the D'Orbigny angrite. Two Sr-carbonates enriched in 84Sr and in 87Sr were used in order to prepare an 84Sr-87Sr DS solution. Preliminary data obtained from terrestrial carbonate rock demonstrate the potential of the Delta88Sr for studying aqueous alteration products on planetary surface.
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| Free Research Field |
宇宙地球化学
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