Phase transformations in serpentine and transportation of water into the lower mantle
Phase transformations in serpentine and transportation of water into the lower mantle
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DOI：
10.1029/97gl03572
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发表时间：
1998-01
影响因子：
5.2
通讯作者：
T. Irifune;Norifumi Kubo;M. Isshiki;Y. Yamasaki
中科院分区：
文献类型：
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作者：
T. Irifune;Norifumi Kubo;M. Isshiki;Y. Yamasaki
蛇纹石（俯冲板片上部的主要含水矿物）的相变已在 26 GPa 的压力和 500 至 1400°C 的温度下进行了研究。虽然蛇纹石在高于 600–800°C 的温度和 12 GPa 的压力下完全脱水，但在较高压力下形成了包括一些致密水合硅酸镁 (DHMS) 的相组合，例如 A 相、E 相、超水 B 和 D 相。人们发现D相具有特别宽的压力和温度范围的稳定场，这表明该相可能在通过冷板片俯冲将水输送到下地幔中发挥重要作用。
Phase transformations in serpentine, the major hydrous mineral in the upper part of the subducting slabs, have been studied at pressures to 26 GPa and at temperatures between 500 and 1400°C. While serpentine completely dehydrates at temperatures higher than 600–800°C and at pressures to 12 GPa, phase assemblages including some dense hydrous magnesium silicates (DHMS) such as phases A, E, superhydrous B and D were formed at higher pressures. Phase D was found to possess a stability field of particularly wide pressure and temperature regime, suggesting that this phase may play an important role in transportation of water into the lower mantle via subduction of cold slabs.