Hydrous Components in the Nominally Anhydrous Minerals

许多名义上无水的矿物含有低浓度的水或氢氧离子，它们结合在其结构的不同部位。 这些成分影响主相的物理和化学性质，其程度与其实际浓度远远不成比例，并构成地球上全球重要的束缚水水库。 该奖项的研究将致力于表征天然矿物和相关合成材料中这些组分的化学形式和浓度，将含水组分与主相的物理和化学性质联系起来，并调查含水组分对陆地地质系统的重要性。本研究期间的另一个具体重点将是分析矿物中出现的液态水的亚微观内含物，并确定它们在矿物中总含水成分清单中的作用以及它们在自然系统中形成的条件。该项目的更广泛影响将是培训一名女研究生;开发可用于其他应用的氢同位素分析新方法;在夏季和学年期间为大学生提供支助;继续维护矿物光谱学网站http://minerals.gps.caltech.edu。

Many minerals that are nominally anhydrous contain low concentrations of water or hydroxide ion bound in distinct sites in their structure. These components influence the physical and chemical properties of the host phase to an extent far disproportionate to their actual concentrations and constitute a globally significant reservoir of bound water in planet Earth. Research in this award will be directed at characterizing the chemical form and concentrations of these components in natural minerals and related synthetic materials, relating the hydrous components to the physical and chemical properties of the host phases, and investigating the significance of the hydrous components to the terrestrial geologic system. An additional specific focus of the current research period will be the analyses of sub-microscopic inclusions of liquid water that occur in minerals and determining their role in the inventory of total hydrous components in minerals and the conditions under which they form in natural systems. Broader impacts of this project will be in the training of a female graduate student; the development of new methodology for hydrogen isotope analysis that could be used for other applications; support for undergraduates during the summer and in the academic year; continuation of the maintenance of the mineral spectroscopy website http://minerals.gps.caltech.edu.