The Behavior of Rare Earth Elements in Hydrothermal Systems: An Experimental Investigation

稀土元素在热液系统中的行为：实验研究

• 批准号: 0099106
• 负责人: Wolfgang Bach
• 金额: $ 19.27万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-04-01 至 2004-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0099106&HistoricalAwards=false
• 关键词: Behavior; Rare; Earth; Elements; Hydrothermal

The goal of this proposed study is to obtain data on the partitioning of rare earth elements (REE) between minerals and aqueous fluids under conditions like those existing in active hydrothermal systems. This will allow a more quantitative evaluation of hypotheses regarding mineral reactions in the so-called "reaction zone" of active systems. With a variety of starting materials and conditions, the experiments will help understand REE partitioning during alteration of plagioclase and clinopyroxene, the main REE- carrying minerals in basalt and diabase. In addition, experiments will be done to evaluate the effect of anhydrite and barite precipitation on the REE patterns of hydrothermal fluids. This study will specifically test the hypothesis that the REE patterns of hydrothermal fluids are due mostly to the alteration of plagioclase.

这项研究的目的是获得有关在活跃热液系统中存在的条件下稀土元素 (REE) 在矿物和水性流体之间分配的数据。这将允许对有关活性系统的所谓“反应区”中的矿物反应的假设进行更定量的评估。通过各种起始材料和条件，这些实验将有助于了解斜长石和单斜辉石（玄武岩和辉绿岩中主要携带稀土元素的矿物）蚀变过程中稀土元素的分配。此外，还将进行实验来评估硬石膏和重晶石沉淀对热液稀土元素模式的影响。本研究将具体检验热液的稀土元素模式主要是由于斜长石的蚀变造成的假设。