Fluid Inclusion and Stable Isotope Study in Mid-Crustal Rocks of the Coastal Orogen, British Columbia and Alaska (Earth Science)

不列颠哥伦比亚省和阿拉斯加沿海造山带中地壳岩石的流体包裹体和稳定同位素研究（地球科学）

• 批准号: 8800073
• 负责人: Maria Crawford
• 金额: $ 4.83万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-09-01 至 1990-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8800073&HistoricalAwards=false
• 关键词: Fluid; Inclusion; Stable; Isotope; Study

A mobile fluid phase forms an important component of the crust in orogenic zones. The late Mesozoic-early Tertiary Coastal Orogen of British Columbia and Alaska provides a setting that includes low to high grade metamorphic rocks and tonalite to granodiorite plutons for investigating fluid-rock interactions. This project focuses on: the character the fluids associated with the metamorphic rocks, with the plutons, and with the quartz and pegmatite veins that cut these rocks; the paths followed by fluids as they are produced and move through the crust; relative timing of fluid evolution, vein formation and deformation; and estimates of fluid volumes and thermal consequences of fluid flow. Major results that can be expected from the study include a better understanding of the nature of the fluids in this portion of the crust, of the mechanism by which fluid moves and transports both dissolved matter and heat, and of the role fluids play in rock deformation in orogenic zones. Professor Crawford will participate as a guest in courses or seminars in metamorphic petrology, isotope geochemistry, fluid inclusion techniques, regional geology and tectonics. This project furthers VPW program objectives which are (1) to provide opportunities for women to advance their careers in engineering and in the disciplines of science supported by NSF and (2) to encourage women to pursue careers in science and engineering by providing greater visibility for women scientists and engineers employed in industry, government, and academic institutions. By encouraging the participation of women in science, it is a valuable investment in the Nation's future scientific vitality.

活动的流体相是造山带地壳的重要组成部分。不列颠哥伦比亚省和阿拉斯加的晚中生代-早第三纪沿海造山带为研究流体-岩石相互作用提供了包括低级到高级变质岩和英云闪长岩到花岗闪长岩的环境。该项目的重点是：与变质岩、深成岩体以及切割这些岩石的石英和伟晶岩脉有关的流体的性质；流体在产生和通过地壳时所遵循的路径；流体演化、脉体形成和变形的相对时间；以及流体体积和流体流动的热后果的估计。这项研究可以预期的主要结果包括更好地了解这部分地壳中流体的性质，流体运动和输送溶解物质和热量的机制，以及流体在造山带岩石变形中所起的作用。克劳福德教授将作为嘉宾参加变质岩石学、同位素地球化学、流体包裹体技术、区域地质学和构造学的课程或研讨会。该项目进一步推动了VPW计划的目标，即：(1)为妇女提供机会，在NSF资助的工程和科学学科中发展她们的职业生涯；(2)通过提高受雇于工业、政府和学术机构的女科学家和工程师的知名度，鼓励妇女追求科学和工程事业。通过鼓励妇女参与科学，这是对国家未来科学活力的宝贵投资。