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题名: The lherzolitic shergottite Grove Mountains 99027: Rare earth element geochemistry
作者: Hsu, WB; Guan, YB; Wang, HN; Leshin, LA; Wang, RC; Zhang, WL; Chen, XM; Zhang, FS; Lin, CY
刊名: METEORITICS & PLANETARY SCIENCE
出版日期: 2004-05-01
卷号: 39, 期号:5, 页码:701-709
文章类型: Article
英文摘要: We report here on an ion probe study of rare earth element (REE) geochemistry in the Iherzolitic shergottite Grove Mountains (GRV) 99027. This meteorite shows almost identical mineralogy, petrology, and REE geochemistry to those of the Iherzolitic shergottites Allan Hills (ALH) A77005, Lewis Cliff (LEW) 88516, and Yamato (Y-) 793605. REE concentrations in olivine, pyroxenes, maskelynite, merrillite, and melt glass are basically comparable to previous data obtained from ALH A77005, LEW 88516, and Y-793605. Olivine is the dominant phase in this meteorite. It is commonly enclosed by large (up to several mm) pigeonite oikocrysts. Non-poikilitic areas consist of larger olivine grains (similar tomm), pigeonite, augite, and maskelynite. Minor merrillite (up to 150 mum in size) is widespread in non-poikilitic regions, occurring interstitially between olivine and pyroxene grains. It is the main REE carrier in GRV 99027 and has relatively higher REEs (200-1000 x CI) than that of other lherzolitic shergottites. A REE budget calculation for GRV 99027 yields a whole rock REE pattern very similar to that of other lherzolites. It is characterized by the distinctive light REE depletion and a smooth increase from light REEs to heavy REEs. REE microdistributions in GRV 99027 strongly support the idea that all lherzolitic shergottites formed by identical igneous processes, probably from the same magma chamber on Mars.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Geochemistry & Geophysics
研究领域[WOS]: Geochemistry & Geophysics
关键词[WOS]: ND ISOTOPIC SYSTEMATICS ; MARTIAN METEORITES ; LEW88516 ; PETROGENESIS ; PETROGRAPHY ; CHEMISTRY ; MINERALS ; MARS ; SR
收录类别: SCI
语种: 英语
WOS记录号: WOS:000221584200005
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/15839
Appears in Collections:天体化学和行星科学实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Lab Astrochem & Planetary Sci, Purple Mtn Observ, Nanjing 210008, Peoples R China
2.Arizona State Univ, Dept Geol Sci, Tempe, AZ 85287 USA
3.Nanjing Univ, Dept Earth Sci, Key State Lab Res Min Deposits, Nanjing 210093, Peoples R China
4.Arizona State Univ, Ctr Meteorite Studies, Tempe, AZ 85287 USA
5.Nanjing Univ, Ctr Mat Anal, Nanjing 210093, Peoples R China
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