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Estimating compositions of natural ringwoodite in the heavily shocked Grove Mountains 052049 meteorite from Raman spectra
Feng, L.1,2; Lin, Y.1; Hu, S.1,2; Xu, L.3; Miao, B.4
2011-10-01
发表期刊AMERICAN MINERALOGIST
卷号96期号:10页码:1480-1489
摘要A combined Raman spectroscopy and electron probe microanalysis study of the heavily shocked Grove Mountains (GRV) 052049 meteorite revealed the largest chemical fractionation of natural ringwoodite, and composition-dependent variation of the intensities and/or wavenumbers of Raman bands. With Fa content [atomic ratio of Fe/(Fe+Mg)] of ringwoodite varying from 27.8 to 81.6 mol%, the peak position of the single band around 290 cm(-1) (SB1), which relates to the SiO(4) translation mode, shifts from 296.0 to 284.6 cm(-1), and one of the doublets around 790 cm(-1) (DB1), which relates to the symmetric stretching of SiO(4), shifts from 796.3 to 782.7 cm(-1). In addition, the relative intensities of SB1 and the other band of the doublet around 840 cm(-1) (DB2), which relates to asymmetric stretching of SiO(4), increases with Fa content. Based on the paired Raman-EPMA data, single-peak and two-peak calibrations were established, which can be used to derive Fa contents of ringwoodite from the Raman spectra. The accuracy of Raman-derived Fa content of ringwoodite is better than +/- 5 mol%. The correlation of SB1 intensity with the Fa content of ringwoodite suggests that the vibration of SB1 is enhanced with the substitution of Mg(2+) by Fe(2+). The correlation between Raman spectra and the chemical composition of ringwoodite have potential applications in on-line measurement of high-pressure experiments and in situ mineralogical determination in future planetary explorations.
关键词Raman Spectroscopy Ringwoodite Chemical Compositions Shocked Meteorite
DOI10.2138/am.2011.3679
收录类别SCI
语种英语
WOS记录号WOS:000295561600008
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被引频次:20[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8036
专题太阳物理研究部
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earths Deep Interior, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100118, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Beijing 100029, Peoples R China
4.Guilin Univ Technol, Dept Resources & Environm Engn, Guilin 541004, Peoples R China
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Feng, L.,Lin, Y.,Hu, S.,et al. Estimating compositions of natural ringwoodite in the heavily shocked Grove Mountains 052049 meteorite from Raman spectra[J]. AMERICAN MINERALOGIST,2011,96(10):1480-1489.
APA Feng, L.,Lin, Y.,Hu, S.,Xu, L.,&Miao, B..(2011).Estimating compositions of natural ringwoodite in the heavily shocked Grove Mountains 052049 meteorite from Raman spectra.AMERICAN MINERALOGIST,96(10),1480-1489.
MLA Feng, L.,et al."Estimating compositions of natural ringwoodite in the heavily shocked Grove Mountains 052049 meteorite from Raman spectra".AMERICAN MINERALOGIST 96.10(2011):1480-1489.
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