Partitioning of F, Cl, the Alkalis and Alkaline Earths in Hydrothermal Ore-Forming Systems

热液成矿系统中 F、Cl、碱金属和碱土的分配

• 批准号: 9204739
• 负责人: Dimitri Sverjensky
• 金额: $ 15.28万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-06-15 至 1995-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9204739&HistoricalAwards=false
• 关键词: Partitioning; Cl; Alkalis; Alkaline; Earths

This project is to continue the study of partitioning of trace elements between minerals and hydrothermal fluids. How do hydrothermal fluids acquire trace elements and become ore-forming fluids? The investigators have recently developed a thermodynamic basis for the partitioning of F and Cl that enables, for the first time, chemical analyses of micas and apatites to be used to place constraints on the pH and the F and Cl contents and speciation of hydrothermal fluids. They expect to expand the applications to (1) Evaluate the pHs of hydrothermal sedimentary basinal and geothermal fluids; (2) study the origins of F enrichment in Mississippi Valley-type ore deposits; and (3) extend the study of partitioning to include the trace alkalis and alkaline earths, by using published experimental studies to calibrate thermodynamic calculations of partitioning of Li, Rb, Cs, Sr, and Ba between micas, feldspars and hydrothermal fluids. The results could have a significant impact upon our understanding of ores develop from hydrothermal solutions.

本项目将继续研究迹线的划分 矿物和热液流体之间的元素。 怎么 热液流体获取微量元素并成矿 液体？ 研究人员最近开发了一种热力学 F和Cl的划分的基础，使得对于第一个 时间，云母和磷灰石的化学分析，用于放置 对pH值、F和Cl含量以及形态的限制 热液流体 他们希望将应用扩展到（1） 热水沉积盆地和地热的pH值评价 （2）研究密西西比富F的成因 （3）扩大分异研究 包括痕量碱金属和碱土金属，通过使用 发表的实验研究，以校准热力学 计算Li、Rb、Cs、Sr和Ba在 云母、长石和热液流体。 结果可能 对我们理解矿石的重大影响来自于 热液