Collaborative Research: Lithium Isotopes in Mid-Ocean Ridge Hydrothermal Fluids: Determining Controls and Assessing the use of Lithium as a Geochemical Tracer

合作研究：大洋中脊热液中的锂同位素：确定控制措施并评估锂作为地球化学示踪剂的用途

• 批准号: 0000882
• 负责人: Lui-Heung Chan
• 金额: $ 2.55万
• 依托单位: Louisiana State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-03-15 至 2003-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0000882&HistoricalAwards=false
• 关键词: Collaborative; Research; Lithium; Isotopes; Mid

ABSTRACT OCE- 9911612 OCE-0000882Seawater that circulates within submarine hydrothermal systems undergoes profound chemical change as it traverses high temperature and pressure conditions that are far different from those of the ambient ocean. Consequently, the hydrothermal water venting from the seafloor is markedly different in composition from the seawater from which it is derived, and for some elements represents an important component of the global mass balance. To understand this process, the rock/water ratio of reactions beneath the seafloor must be understood. In this work, Li isotope systematics in mid-ocean ridge hydrothermal systems will be investigated because Li has been found to be a good tool for understanding the rock/water behavior within the seafloor systems. The Li isotopic composition of previously collected hydrothermal fluids will be determined on samples that have already been analyzed for major and minor elements and for Li concentration. These samples are from four different sites along the mid-ocean ridge system.

摘要OCE-9911612 OCE-00008882SEAWATER，在海底热液系统中循环，由于它遍历与环境海洋的高温和压力条件大不相同的高温和压力条件，因此经历了深刻的化学变化。因此，从海底排气的水热水与衍生的海水的组成有很大不同，而对于某些元素来说，代表了全球质量平衡的重要组成部分。要了解这一过程，必须理解海底下方反应的岩石/水比。在这项工作中，将研究中海脊中水热系统中的LI同位素系统学，因为已发现LI是了解海底系统中岩石/水行为的好工具。先前收集的水热流体的LI同位素组成将在已经分析的主要和次要元素以及LI浓度的样品上确​​定。这些样品来自沿中山脊系统的四个不同地点。