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The valence state and partitioning of iron in the Earth’s lowermost mantle
http://hdl.handle.net/2237/20807
http://hdl.handle.net/2237/208071d37d5bf-167c-4a9f-b2c4-987b4d6397be
名前 / ファイル | ライセンス | アクション |
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jgrb16835.pdf (568.2 kB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2014-11-18 | |||||
タイトル | ||||||
タイトル | The valence state and partitioning of iron in the Earth’s lowermost mantle | |||||
言語 | en | |||||
著者 |
Sinmyo, Ryosuke
× Sinmyo, Ryosuke× Hirose, Kei× Muto, Shunsuke× Ohishi, Yasuo× Yasuhara, Akira |
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アクセス権 | ||||||
アクセス権 | open access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
権利 | ||||||
言語 | en | |||||
権利情報 | Copyright 2011 by the American Geophysical Union. | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Experimental mineralogy and petrology | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | High-pressure behavior | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Mineral and crystal chemistry | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Reactions and phase equilibria | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | X-ray, neutron, and electron spectroscopy and diffraction | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | 1] While iron occurs predominantly in the form of Fe^2+ in the Earth's upper mantle and transition zone, Al-bearing (Mg,Fe)SiO3 perovskite (Pv), a primary mineral in the lower mantle, contains a large proportion of ferric iron (Fe^3+). It has been demonstrated that such Fe^3+ strongly affects physical and chemical properties of Pv. On the other hand, the iron substitution mechanism and valence state of iron in postperovskite (PPv) are still unclear. Here we determined the valence state of iron in PPv with changing Al^3+ content, on the basis of electron energy-loss near-edge structure spectroscopy measurements. The results show that PPv includes a small amount of Fe^3+, which is independent from the Al3+ content. This indicates that Fe^3+ in Pv and coexisting metallic iron recombine to form Fe^2+ upon phase transition from Pv to PPv in pyrolitic mantle. Such Fe^2+ partitions preferentially into (Mg,Fe)O ferropericlase (Fp), and therefore PPv is depleted in iron compared to Pv. Such a marked change in the valence state of iron and resulting iron depletion in PPv have broad implications for seismic and transport properties in the lowermost mantle. Phase transition from Pv to Fe-poor PPv occurs in a much narrower pressure range than that for a fixed iron content. | |||||
言語 | en | |||||
出版者 | ||||||
出版者 | John Wiley & Sons | |||||
言語 | en | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
出版タイプ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1029/2010JB008179 | |||||
ISSN | ||||||
収録物識別子タイプ | PISSN | |||||
収録物識別子 | 0148-0227 | |||||
書誌情報 |
en : Journal of Geophysical Research: Solid Earth 巻 116, 号 B7, p. B07205-B07205, 発行日 2011-07 |
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著者版フラグ | ||||||
値 | publisher | |||||
URI | ||||||
識別子 | http://dx.doi.org/10.1029/2010JB008179 | |||||
識別子タイプ | DOI | |||||
URI | ||||||
識別子 | http://hdl.handle.net/2237/20807 | |||||
識別子タイプ | HDL |