Water-Rich Magmatic Systems: H2O and Silicate Solubility and Solubility Mechanisms in Hydrous Melts and Silicate-Saturated Aqueous Solutions at Pressures and Temperatures ...

富水岩浆系统：水和硅酸盐的溶解度以及在压力和温度下含水熔体和硅酸盐饱和水溶液中的溶解机制......

• 批准号: 9901886
• 负责人: Bjorn Mysen
• 金额: $ 7.68万
• 依托单位: Carnegie Institution of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-07-01 至 2002-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9901886&HistoricalAwards=false
• 关键词: Water; Rich; Magmatic; Systems; H2O

9901886MysenLaboratory data on melting, crystallization, and mass transport of magma and aqueous fluids in the Earth's crust and upper mantle will be employed to characterize materials recycling in the Earth. The project integrates acquisition of solubility data and solubility behavior of H2O in magmatic liquids and of silicate in aqueous solutions in the pressure and temperature range of the Earth's crust and upper mantle. Solubility data and structural information will be obtained primarily in peralkaline aluminosilicate systems with a range of compositions so as to be able to model magmatic liquids including basalt, andesite, and rhyolite compositions. To this end, we will examine the effect of melt polymerization, the influence of Al2O3, and relative effects of metal cations (alkalis and alkaline earths) on both on the H2O solubility behavior in hydrous melts and the silicate solubility in aqueous solutions. Solubility measurements will be carried out by combinations of instrumental techniques on quenched materials as well as phase equilibrium measurements when the melts and fluids to not quench to a homogeneous phase. Structural information on both melts and fluids will be obtained by using confocal microRaman spectroscopy in conjunction with the externally heated diamond anvil cell. Nuclear magnetic resonance will be employed when needed to assign Raman bands and to calibrate Raman band intensities to obtain quantitative information on the abundance of structural units in hydrous melt and silicate-rich fluids. The results will be used to establish the links between melt and fluid structure on the one hand and properties such as composition-activity relations among structural units in melts and fluids, liquidus phase relations, density and viscosity of hydrous magmatic liquids and silicate-saturated aqueous solutions.

9901886迈森实验室关于地壳和上地幔中岩浆和含水流体的熔融、结晶和质量输送的数据将用于描述地球中物质再循环的特征。 该项目整合了在地壳和上地幔的压力和温度范围内，岩浆液体中H2O和水溶液中硅酸盐的溶解度数据和溶解度行为的采集。溶解度数据和结构信息将主要在过碱性铝硅酸盐系统中获得，具有一系列组合物，以便能够模拟岩浆液体，包括玄武岩，安山岩和流纹岩组合物。为此，我们将研究熔融聚合的效果，Al 2 O3的影响，以及金属阳离子（碱金属和碱土金属）对含水熔体中的H2O溶解度行为和硅酸盐在水溶液中的溶解度的相对影响。 溶解度测量将通过对淬火材料的仪器技术以及当熔体和流体未淬火成均相时的相平衡测量的组合进行。熔体和流体的结构信息将通过使用共焦显微拉曼光谱与外部加热的金刚石对顶砧单元。当需要分配拉曼谱带和校准拉曼谱带强度时，将采用核磁共振，以获得含水熔体和富硅酸盐流体中结构单元丰度的定量信息。 这些结果将被用来建立熔体和流体结构之间的联系，一方面和性质，如熔体和流体中的结构单元之间的组成-活性关系，液相线相关系，含水岩浆液体和硅酸盐饱和水溶液的密度和粘度。