Collaborative Research: A Geochemical Model of Magmatic Hydrothermal REE Mineralization in the Capitan Mts., New Mexico

合作研究：新墨西哥州卡皮坦山岩浆热液稀土矿化的地球化学模型

• 批准号: 9018870
• 负责人: Philip Candela
• 金额: $ 2.96万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-06-01 至 1993-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9018870&HistoricalAwards=false
• 关键词: Collaborative; Research; Geochemical; Model; Magmatic

Although granitic magmas are often invoked as sources of hydrothermal ore solutions, very little direct evidence exists for a genetic link between a specific mineral deposit and a specific magmatic body. This link may be provided by studying the Capitan Pluton and its associated quartz-allanite mineralization. The evolution and composition of the magmatic fluid phase can be modeled using the constraints provided by the existing detailed geochemistry of the Capitan pluton. This will be compared with the composition of the actual magmatic fluids which were responsible for mineralization. Vein minerals (quartz, allanite and titanite) and their trapped fluid inclusions will be analyzed for stable isotope, elemental and gas compositions. Comparison of the measured fluid composition and the computer-modeled composition should provide insight into the processes involved in magmatic aqueous fluid evolution.

虽然花岗岩岩浆常被认为是热液矿液的来源，但很少有直接证据表明某一特定矿床与某一特定岩浆体之间存在遗传联系。这一联系可以通过研究Capitan岩体及其伴生的石英-allanite矿化来提供。岩浆液相的演化和组成可以利用Capitan岩体现有详细地球化学资料提供的约束条件进行建模。这将与负责成矿作用的实际岩浆流体的组成进行比较。脉状矿物（石英、allanite和钛矿）及其包裹体将分析其稳定同位素、元素和气体组成。将测量到的流体组成与计算机模拟的组成进行比较，将有助于了解岩浆含水流体演化的过程。