High concentration of water in stishovite in the MORB system
High concentration of water in stishovite in the MORB system
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DOI：
10.1029/2002gl015579
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发表时间：
2002-11
影响因子：
5.2
通讯作者：
J. Chung;H. Kagi
中科院分区：
文献类型：
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作者：
J. Chung;H. Kagi
从天然玄武岩合成的辉石显示出有史以来最高的氢浓度。在本研究中，从抛光的辉石单晶获得的水浓度最高可达5628±291个氢原子/106个硅原子(844±44ppm水)。氢的浓度随着三价阳离子取代度的增加而增加，三价阳离子的取代度以铝为主，温度对氢在辉钛矿中的掺入有显著影响。这一研究结果表明，俯冲玄武岩地壳中的辉石可能是一种重要的含水相，并有助于氢向下地幔的输送。
Stishovite synthesized from natural basalt showed the highest concentration of hydrogen ever reported. The water concentration obtained from the polished single crystal of stishovite in this study was up to a maximum of 5628 ± 291 atoms of hydrogen per 106 silicon atoms (844 ± 44 ppm water). The concentration of hydrogen increased with increasing substitution of trivalent cations, which is almost aluminum, and temperature has a significant effect on the incorporation of hydrogen into stishovite. The result of this study suggests that stishovite in subducted basaltic crust could be an important water‐containing phase and contribute to the transport of hydrogen to the lower mantle.