The Distribution of Hydrogen and its Isotopes in the Upper Mantle

红外光谱测量表明，氢在结构上结合在所有主要的“无水”地幔矿物中，在晶格中以OH-代替O=取代。这种替代可能代表了水在上地幔中的主要储存机制。这项建议旨在对各种样品进行分析，以确定名义上无水矿物的氢同位素组成与其他地球化学参数的关系。这些结果将提供对地幔中水的性质的见解，并将对地球的脱气、水循环以及与各种地幔套形成相关的条件设定限制。

Infrared spectroscopic measurements demonstrate that hydrogen is structurally bound within all of the major "anhydrous" mantle minerals as an OH- for O= substitution in the crystal lattice. This substitution may represent the primary storage mechanism for water in the upper mantle. This proposal seeks to carry out analyses on a variety of samples to determine the hydrogen isotopic composition of nominally anhydrous minerals in relation to other geochemical parameters. These results will provide insights into the nature of water in the mantle and will set constraints on the earth's degassing, water recycling, and the conditions associated with the formation of a variety of mantle suites.