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

在造山带中，流动流体相是地壳的重要组成部分。不列颠哥伦比亚省和阿拉斯加的中生代晚期-早第三纪海岸造山带为研究流体-岩石相互作用提供了一个包括低至高品位变质岩和闪长岩-花岗闪长岩岩体的环境。本项目的重点是：与变质岩、岩体以及切割这些岩石的石英和伟晶岩脉相关的流体特征；流体产生并穿过地壳时所遵循的路径；流体演化、静脉形成和变形的相对时间；估计流体体积和流体流动的热后果。这项研究有望取得的主要成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方面的课程或研讨会。该项目进一步推进了VPW计划的目标，即(1)为女性提供在工程和NSF支持的科学学科中发展职业的机会；(2)通过为在工业、政府和学术机构工作的女性科学家和工程师提供更大的知名度，鼓励女性在科学和工程领域追求职业。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。

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.