Geophysical observations suggest that the transition zone is wet locally. Continental and oceanic sediment components together with the basaltic and peridotitic components might be transported and accumulated in the transition zone. Low-velocity anomalies at the upper mantle–transition zone boundary might be caused by the existence of dense hydrous magmas. Water can be carried farther into the lower mantle by the slabs. The anomalous Q and shear wave regions locating at the uppermost part of the lower mantle could be caused by the existence of fluid or wet magmas in this region because of the water-solubility contrast between the minerals in the transition zone and those in the lower mantle. δ-H solid solution AlO₂H–MgSiO₄H₂ carries water into the lower mantle. Hydrogen-bond symmetrization exists in high-pressure hydrous phases and thus they are stable at the high pressures of the lower mantle. Thus, the δ-H solid solution in subducting slabs carries water farther into the bottom of the lower mantle. Pyrite FeO₂H_x is formed due to a reaction between the core and hydrated slabs. This phase could be a candidate for the anomalous regions at the core–mantle boundary.

中文翻译：

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水在地幔中的作用

地球物理观测表明过渡带局部潮湿。陆相和大洋沉积组分与玄武岩和橄榄岩组分可能在过渡带中运移和聚集。上地幔-过渡带边界处的低速异常可能是由于稠密含水岩浆的存在造成的。水可以被板块带入更远的下地幔。位于下地幔最上部的异常Q波和横波区可能是由于过渡带矿物与下地幔矿物的水溶性差异导致该区域存在流体或湿岩浆所致。 . δ-H 固溶体 AlO ₂ H-MgSiO ₄ H ₂将水带入下地幔。氢键对称化存在于高压含水相中，因此它们在下地幔的高压下是稳定的。因此，俯冲板片中的 δ-H 固溶体将水带入更远的下地幔底部。黄铁矿FeO ₂ H _x是由于岩心和水合板坯之间的反应而形成的。这一阶段可能是地核-地幔边界异常区域的候选者。