Trace Element and Rare Earth Element (REE) Partitioning during Fluid-Mineral Equilibria at Elevated Temperatures andPressures

高温高压下流体-矿物平衡期间的微量元素和稀土元素 (REE) 分配

• 批准号: 8916893
• 负责人: William Seyfried
• 金额: $ 14.9万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-02-01 至 1993-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8916893&HistoricalAwards=false
• 关键词: Trace; Element; Rare; Earth; REE

Trace element and Rare Earth Element chemistry of hot spring fluids in mid-ocean ridges depends upon two factors: 1) the composition of the host rock through which these fluids flow; and 2) the chemical exchanges that occur between the rocks and the fluids. However, for these elements to be useful in gaining understanding of either rock composition or chemical alterations that occur in sub-seafloor hydrothermal systems, much has yet to be learned about mineral-fluid equilibria under in situ conditions. The Drs. Seyfried and Berndt will conduct lab experiments that duplicate the temperature, pressure, mineral and fluid conditions thought to exist within mid-ocean ridges. The goal is to gain a quantitative understanding of the thermodynamic basis for the distribution of trace elements and Rare Earth Elements between minerals and hydrothermal fluids. Most of the work will be conducted at the Univ. of Minnesota, but special techniques involving REE analysis is sub-contracted to Dr. Klinkhammer who will do the work at MIT.

大洋中脊温泉流体的微量元素和稀土元素化学取决于两个因素：1)这些流体流经的寄主岩石的组成；2)岩石和流体之间发生的化学交换。然而，要使这些元素有助于了解海底以下热液系统中的岩石成分或化学变化，还需要对就地条件下的矿物-流体平衡有很多了解。塞弗里德博士和伯恩特博士将进行实验室实验，复制被认为存在于大洋中脊的温度、压力、矿物和流体条件。其目的是定量了解微量元素和稀土元素在矿物和热液流体之间分布的热力学基础。大部分工作将在大学进行。但涉及稀土元素分析的特殊技术被分包给将在麻省理工学院从事这项工作的克林克哈默博士。