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Geochronology of the Martian meteorite Zagami revealed by U-Pb ion probe dating of accessory minerals

文献类型：期刊论文

作者Zhou, Qin1,2; Herd, Christopher D. K.3; Yin, Qing-Zhu4; Li, Xian-Hua1; Wu, Fu-Yuan1; Li, Qiu-Li1; Liu, Yu1; Tang, Guo-Qiang1; McCoy, Timothy J.5
刊名EARTH AND PLANETARY SCIENCE LETTERS
出版日期2013-07-15
卷号374页码:156-163
关键词Mars geochronology shergottite uranium-lead baddeleyite
ISSN号0012-821X
DOI10.1016/j.epsl.2013.05.035
文献子类Article
英文摘要The precise chronology of geological events on Mars is hampered by the lack of absolute ages for the Martian timescale, and the significant uncertainties that result from the extrapolation of the lunar timescale to Mars (Hartmann and Neukum, 2001). Martian meteorites represent the only samples of Mars currently available. Attempts to identify source craters for the meteorites have thus far proven inconclusive (Hamilton et al., 2003; Lang et al., 2009; Mouginis-Mark and Boyce, 2012), precluding their use in constraining the absolute Martian timescale. The majority of the known Martian meteorites are basalts ("shergottites"); all dated shergottites have mineral separate (Rb-Sr or Sm-Nd) ages of <600 Ma (Borg et al., 2005). Here we report a U-238/Pb-206 age of 182.7 +/- 6.9 Ma by ion microprobe analysis of baddeleyite (ZrO2) grains in the Zagami shergottite. There is no correlation between discordancy and baddeleyite grain location relative to shock metamorphism. Mineral petrography demonstrates that baddeleyite is the result of late-stage igneous crystallization, and Raman spectroscopy shows that baddeleyite has not been transformed by shock into preservable high-pressure polymorphs. Supported by an age of 153 +/- 81 Ma for phosphate grains, obtained using the same method, we conclude that Zagami crystallized at similar to 180 Ma, in agreement with previous results from mineral separate geochronology. Therefore, the shergottites represent igneous rocks preferentially ejected from young terrains on Mars in a small number of ejection events. (C) 2013 Elsevier B.V. All rights reserved.
WOS关键词ISOTOPIC SYSTEMATICS ; SNC METEORITES ; RB-SR ; DIFFERENTIATION HISTORY ; MARS ; SHERGOTTY ; SHOCK ; AGES ; CRYSTALLIZATION ; PETROGENESIS
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000324663700015
出版者ELSEVIER SCIENCE BV
资助机构Natural Sciences and Engineering Research Council of Canada(261740-08) ; Natural Sciences and Engineering Research Council of Canada(261740-08) ; Natural Sciences and Engineering Research Council of Canada(261740-08) ; Natural Sciences and Engineering Research Council of Canada(261740-08) ; Smithsonian Senior Research Fellowship ; Smithsonian Senior Research Fellowship ; Smithsonian Senior Research Fellowship ; Smithsonian Senior Research Fellowship ; State Key Laboratory of Lithospheric Evolution, IGG-CAS(Z201003) ; State Key Laboratory of Lithospheric Evolution, IGG-CAS(Z201003) ; State Key Laboratory of Lithospheric Evolution, IGG-CAS(Z201003) ; State Key Laboratory of Lithospheric Evolution, IGG-CAS(Z201003) ; NSFC(41221002) ; NSFC(41221002) ; NSFC(41221002) ; NSFC(41221002) ; Natural Sciences and Engineering Research Council of Canada(261740-08) ; Natural Sciences and Engineering Research Council of Canada(261740-08) ; Natural Sciences and Engineering Research Council of Canada(261740-08) ; Natural Sciences and Engineering Research Council of Canada(261740-08) ; Smithsonian Senior Research Fellowship ; Smithsonian Senior Research Fellowship ; Smithsonian Senior Research Fellowship ; Smithsonian Senior Research Fellowship ; State Key Laboratory of Lithospheric Evolution, IGG-CAS(Z201003) ; State Key Laboratory of Lithospheric Evolution, IGG-CAS(Z201003) ; State Key Laboratory of Lithospheric Evolution, IGG-CAS(Z201003) ; State Key Laboratory of Lithospheric Evolution, IGG-CAS(Z201003) ; NSFC(41221002) ; NSFC(41221002) ; NSFC(41221002) ; NSFC(41221002) ; Natural Sciences and Engineering Research Council of Canada(261740-08) ; Natural Sciences and Engineering Research Council of Canada(261740-08) ; Natural Sciences and Engineering Research Council of Canada(261740-08) ; Natural Sciences and Engineering Research Council of Canada(261740-08) ; Smithsonian Senior Research Fellowship ; Smithsonian Senior Research Fellowship ; Smithsonian Senior Research Fellowship ; Smithsonian Senior Research Fellowship ; State Key Laboratory of Lithospheric Evolution, IGG-CAS(Z201003) ; State Key Laboratory of Lithospheric Evolution, IGG-CAS(Z201003) ; State Key Laboratory of Lithospheric Evolution, IGG-CAS(Z201003) ; State Key Laboratory of Lithospheric Evolution, IGG-CAS(Z201003) ; NSFC(41221002) ; NSFC(41221002) ; NSFC(41221002) ; NSFC(41221002) ; Natural Sciences and Engineering Research Council of Canada(261740-08) ; Natural Sciences and Engineering Research Council of Canada(261740-08) ; Natural Sciences and Engineering Research Council of Canada(261740-08) ; Natural Sciences and Engineering Research Council of Canada(261740-08) ; Smithsonian Senior Research Fellowship ; Smithsonian Senior Research Fellowship ; Smithsonian Senior Research Fellowship ; Smithsonian Senior Research Fellowship ; State Key Laboratory of Lithospheric Evolution, IGG-CAS(Z201003) ; State Key Laboratory of Lithospheric Evolution, IGG-CAS(Z201003) ; State Key Laboratory of Lithospheric Evolution, IGG-CAS(Z201003) ; State Key Laboratory of Lithospheric Evolution, IGG-CAS(Z201003) ; NSFC(41221002) ; NSFC(41221002) ; NSFC(41221002) ; NSFC(41221002)
源URL[http://ir.iggcas.ac.cn/handle/132A11/87444]  
专题中国科学院地质与地球物理研究所
通讯作者Herd, Christopher D. K.
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100029, Peoples R China
3.Univ Alberta, Dept Earth & Atmospher Sci, Edmonton, AB T6G 2E3, Canada
4.Univ Calif Davis, Dept Geol, Davis, CA 95616 USA
5.Smithsonian Natl Museum Nat Hist, Dept Mineral Sci, Washington, DC 20560 USA
推荐引用方式
GB/T 7714		 Zhou, Qin,Herd, Christopher D. K.,Yin, Qing-Zhu,et al. Geochronology of the Martian meteorite Zagami revealed by U-Pb ion probe dating of accessory minerals[J]. EARTH AND PLANETARY SCIENCE LETTERS,2013,374:156-163.
APA Zhou, Qin.,Herd, Christopher D. K..,Yin, Qing-Zhu.,Li, Xian-Hua.,Wu, Fu-Yuan.,...&McCoy, Timothy J..(2013).Geochronology of the Martian meteorite Zagami revealed by U-Pb ion probe dating of accessory minerals.EARTH AND PLANETARY SCIENCE LETTERS,374,156-163.
MLA Zhou, Qin,et al."Geochronology of the Martian meteorite Zagami revealed by U-Pb ion probe dating of accessory minerals".EARTH AND PLANETARY SCIENCE LETTERS 374(2013):156-163.

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