Stability of Hydrous Minerals and Water Reservoirs in the Deep Earth Interior
Stability of Hydrous Minerals and Water Reservoirs in the Deep Earth Interior
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DOI：
10.1002/9781118992487.ch21
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发表时间：
2016-03
期刊：
影响因子：
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通讯作者：
E. Ohtani;Y. Amaike;S. Kamada;I. Ohira;I. Mashino
中科院分区：
文献类型：
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作者：
E. Ohtani;Y. Amaike;S. Kamada;I. Ohira;I. Mashino
本章总结了含水相和名义上无水矿物在地幔深部的水储存能力。水对地幔矿物相变的相边界有重要影响，可以解释410和660 km地震间断面的某些地形。由于电导率对矿物中的氢含量非常敏感，因此有几项关于wadsleyite和ringwoodite电导率的研究来确定地幔过渡带中的水含量。地幔过渡带由于其主要成分水溶性高，具有很高的水储存能力，wadsleyite和ringwoodite，并存储大量的水至少在局部。含水相H、MgSiO 2（OH）2及其与δ-AlOOH等结构相的固溶体在下地幔中储存水，并通过板片俯冲将水输送到下地幔底部。
This chapter summarizes water storage capacities in hydrous phases and nominally anhydrous minerals in the deep mantle. Water has significant effects on the phase boundaries of the phase transformations of the mantle minerals and can explain some topography of the 410 and 660 km seismic discontinuities. There are several electrical conductivity studies of wadsleyite and ringwoodite to determine the water content in the mantle transition zone, since electrical conductivity is very sensitive to the hydrogen contents in minerals. The mantle transition zone has a high water storage capacity due to high water solubility in its major constituents, wadsleyite and ringwoodite, and stores significant amount of water at least locally. Hydrous phase H, MgSiO2(OH)2, and its solid solution with isostructural phase δ‐AlOOH store water in the lower mantle, and they transport water into the bottom of the lower mantle by slab subduction.