REU Site: Analysis of Glacial Sediments, Minnesota and Brazil: Evidence of Paleo-ice Stream Dynamics

REU 站点：明尼苏达州和巴西冰川沉积物分析：古冰流动力学的证据

• 批准号: 1262945
• 负责人: James F Cotter
• 金额: $ 25.76万
• 依托单位: University of Minnesota Morris
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-04-15 至 2017-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1262945&HistoricalAwards=false
• 关键词: REU; Site; Analysis; Glacial; Sediments

The goal of the UMM REU program is to develop time-constrained models for two very different proposed paleo-ice streams. REU participants will study glacial deposits of the Late Paleozoic Paraná lobe of Brazil and Late Pleistocene age Des Moines lobe of Minnesota. Detailed mapping of landforms, sediment analysis and the analysis of subglacial bedforms will provide a greater understanding of the movement and the causes of rapid ice stream flow. The role of ice streams in the mass balance of ice sheets is of critical importance (approximately 90% of all discharge of the Antarctic ice sheet is by ice streams), yet a great deal is unknown. This research will focus on: the influence of climate on ice stream movement, the significance of marine interaction and ice sheet grounding, and the nature of ice stream flow (sliding vs. deformation). Uniquely, participants have an opportunity to research ice streams in two very different geologic contexts: in Minnesota they will study surficial geology and unconsolidated sands and gravels while in Brazil they will study stratigraphy and sedimentary rocks. The UMM REU program will also nurture the development of 16 Native American women geology majors over two summers in both an international setting and in an environment where women and Native Americans are in the majority. Native American women are extremely underrepresented in the Geosciences. The UMM REU program has components designed specifically to remedy this situation by providing peer support, developing participant confidence and introducing participants to supportive role models. UMM REU students will participate in a seminar component of the program where they will examine pathways to "thinking like a geologist," issues in scientific ethics, meet professional women geoscientists, and begin planning future academic and scientific careers. Participants will give a professional talk and lead a field trip. This program will build confidence and aid in the maturation of these Native American women as scientists and individuals. This REU site is co-funded by the Office of International and Integrated Activities and the Division of Earth Sciences.

UMM REU计划的目标是为两个非常不同的建议古冰流开发时间约束模型。 REU参与者将研究巴西晚古生代巴拉那叶和明尼苏达州晚更新世时代得梅因叶的冰川沉积物。 详细的地形测绘、沉积物分析和冰下底形分析将有助于更好地了解冰流的运动和快速流动的原因。冰流在冰盖质量平衡中的作用至关重要（南极冰盖约90%的流量来自冰流），但仍有许多未知数。 这项研究将侧重于：气候对冰流运动的影响，海洋相互作用和冰盖接地的意义，以及冰流流动的性质（滑动与变形）。 独特的是，参与者有机会在两个非常不同的地质背景下研究冰流：在明尼苏达州，他们将研究表层地质和松散的沙子和砾石，而在巴西，他们将研究地层学和沉积岩。 UMM REU计划还将在国际环境和妇女和美洲原住民占多数的环境中培养16名美洲原住民妇女地质学专业的发展。美国土著妇女在地球科学领域的代表性极低。 UMM REU计划有专门设计的组件，通过提供同伴支持，发展参与者的信心和向参与者介绍支持性榜样来纠正这种情况。 UMM REU学生将参加该计划的研讨会部分，他们将研究“像地质学家一样思考”的途径，科学伦理问题，满足专业女性地质科学家，并开始规划未来的学术和科学职业。 参与者将进行专业演讲并带领实地考察。 该计划将建立信心，并在这些美洲土著妇女作为科学家和个人的成熟援助。 该REU网站由国际和综合活动办公室以及地球科学司共同资助。