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Acoustic wave velocities of ferrous-bearing MgSiO3 glass up to 158 GPa with 2 implications for dense silicate melts at the base of the Earth’s mantle
https://repo.qst.go.jp/records/86606
https://repo.qst.go.jp/records/86606cf12b404-8191-43e3-a450-76e2b380d5f4
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2022-02-24 | |||||
| タイトル | ||||||
| タイトル | Acoustic wave velocities of ferrous-bearing MgSiO3 glass up to 158 GPa with 2 implications for dense silicate melts at the base of the Earth’s mantle | |||||
| 言語 | ||||||
| 言語 | jpn | |||||
| 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 | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Mashino, Izumi
× Mashino, Izumi× Murakami, Motohiko× Kitao, Shinji× Mitsui, Takaya× Masuda, Ryo× Seto, Makoto× Takaya, Mitsui |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | We conducted in-situ high-pressure acoustic wave velocitymeasurements of Fe2+-bearing MgSiO3 glass up to 158 GPaby means of Brillouin scattering spectroscopy to understand the effect of iron on silicate melt in the lower mantle.Thechange in trend of the velocity profile, likely induced by the structural transition in Si-O coordination numberproposedin previous studies of silicate glasses, is also observed around 129 GPa. The transition pressurebecomes 125-128 GPa when considering the iron content of melts in a pyrolitic or chondritic mantle, whichis lower than the pressures of the CMB and the ULVZs. Our datashowthe substitution of 12mol% Fe in MgSiO3 glass decreases the VS by ~5.5 %. This study implies that iron considerably affect onthe buoyancy relations between melts/crystals and the iron-bearing melts at the lowermost mantle will have thehigher coordination numberthan sixfold. | |||||
| 書誌情報 |
Geophysical Research Letters p. e2022GL098279, 発行日 2022-06 |
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| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.1029/2022GL098279 | |||||
