Chlorine in Mafic and Intermediate Melts and Associated Fluids: An Experimental Study

镁铁质和中间熔体及相关流体中的氯：实验研究

• 批准号: 9526622
• 负责人: James Webster
• 金额: $ 12.66万
• 依托单位: American Museum Natural History
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-01-01 至 2001-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9526622&HistoricalAwards=false
• 关键词: Chlorine; Mafic; Intermediate; Melts; Associated

9526622 Webster The proposed research will provide knowledge of the behavior of chlorine in the degassing of mafic and intermediate magmas. Projects to be undertaken include determination of: (a) the solubility of chlorine in anhydrous molten basalt and andesite as a function of major element composition, pressure and temperature, (b) the partitioning of chlorine between melt and H2O and H2O-CO2 fluids as a function of pressure from 250 to 2000 bars, and over a wide range of chlorine concentrations, and (c) chlorine partitioning between melt and apatite. Experiments will be conducted in internally heated pressure vessels, rapid-quench externally heated TXM pressure vessels and evacuated silica tubes suspended in a vertical muffle furnace. The data will be used to model the evolution of hydromagmatic fluid during crystallization of mafic magmas, to better deduce pre-eruption volatile budgets, to develop theoretical models of volcanic degassing, and to better estimate the capacity of magmatic gases to transport metals within the upper crust and volcanic edifices.

9526622 Webster 拟议的研究将提供有关氯在镁铁质和中间岩浆脱气中行为的知识。 即将开展的项目包括确定：(a) 氯在无水熔融玄武岩和安山岩中的溶解度与主要元素组成、压力和温度的函数关系，(b) 氯在熔体与 H2O 和 H2O-CO2 流体之间的分配：是 250 至 2000 巴压力和大范围氯浓度的函数，以及 (c) 氯在熔体和磷灰石之间分配。 实验将在内部加热压力容器、快速淬火外部加热TXM压力容器和悬挂在立式马弗炉中的真空石英管中进行。 这些数据将用于模拟镁铁质岩浆结晶过程中水岩浆流体的演化，更好地推断喷发前的挥发性预算，开发火山脱气的理论模型，并更好地估计岩浆气体在上部岩浆中输送金属的能力。地壳和火山建筑物。