Nature of Silicate Melts: Role of Highly Charged Cations

首席研究员将尝试确定高电荷阳离子在过碱性、过铝和偏铝花岗岩到正长质熔体中的溶液特性。目标是建立高电荷阳离子和网络形成修饰阳离子相互作用的层次结构。要确定的是各种玻璃的魔角自旋核磁共振和振动光谱，含有一个或多个高电荷阳离子的一元氧化物的饱和面(作为碱/氧化铝比的函数)，以及各种流体成分在影响高电荷阳离子的稳定性和配位状态中的作用。总体而言，这项工作将增加地质学家对某些类型岩浆中存在的复杂相互作用的理解。

The principal investigator will attempt to determine the solution characteristics of highly charged cations in peralkaline, peraluminous, and metaluminous granitic to syenitic melts. The objectives are to establish a hierarchy of interactions of highly charged cations and network-forming modifying cations. To be determined are the magic angle spinning nuclear magnetic resonance and vibrational spectra of various glasses, the saturation surfaces of unary oxides containing one or more highly charges cations (as a function of alkali/alumina ratio), and the role of various fluid components in affecting stability and coordination states of highly charged cations. Overall this work will increase geologist' understanding of the complex interactions that exist within certain kinds of magmas.