Petrologic and Stable Isotopic Investigation of the Role of Metasomatism During Regional Metamorphism in the Barrovian Type Area, Scotland

苏格兰巴罗维类型地区区域变质作用过程中交代作用的岩石学和稳定同位素研究

• 批准号: 9405889
• 负责人: Jay Ague
• 金额: $ 10.6万
• 依托单位: Yale University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-07-15 至 1998-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9405889&HistoricalAwards=false
• 关键词: Petrologic; Stable; Isotopic; Investigation; Role

9405889 Ague The proposed research will continue to address the hypothesis that major metasomatism may control the mineralogic evolution of pelites. If pelite chemistry may be commonly altered as a result of syn-metamorphic fluid flow processes, then metamorphism plays a much larger role in determining the physicochemical evolution of the middle and lower crust than previously thought. The hypothesis will be tested by carrying out an integrative petrologic and stable isotope study in Barrovian type area of the Scottish Highlands. The aims of the proposed research are to (1) determine the nature and effects of mass transfer through regional mapping of vein sets and petrologic mass balance analysis, (2) constrain the timing of mass transfer relative to metamorphic and deformational events using petrographic observations and backscattered electron imaging, and (3) determine the fluxes of metasomatic fluids, time scales of fluid flow, and fluid flow paths using both petrologic and stable isotope methods.

9405889 Ague拟议的研究将继续解决这样的假设，即主要交代作用可能控制泥质岩的矿物学演化。如果说泥岩化学可能是同变质流体流动过程的普遍结果，那么变质作用在决定中、下地壳物理化学演化中的作用比之前认为的要大得多。这一假说将通过在苏格兰高地巴罗维亚类型地区进行综合岩石学和稳定同位素研究来验证。这项研究的目的是(1)通过区域矿脉组填图和岩石学质量平衡分析来确定质量传递的性质和效果，(2)利用岩石学观察和背散射电子成像来约束相对于变质和变形事件的质量传递的时间，以及(3)利用岩石学和稳定同位素方法来确定交代流体的通量、流体流动的时间尺度和流体流动的路径。