CAREER: An Integrated Geophysical Approach to Research and Education to Solve the Tectonic Puzzle of the Northern Atlantic

职业：解决北大西洋构造难题的综合地球物理研究和教育方法

• 批准号: 2238340
• 负责人: Irina Filina
• 金额: $ 74.63万
• 依托单位: University of Nebraska-Lincoln
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-03-01 至 2028-02-29
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2238340&HistoricalAwards=false
• 关键词: CAREER; Integrated; Geophysical; Approach; Research

The Northern Atlantic has diverse geologic features including a hotspot under Iceland, volcanic-rich passive continental margins of Norway and Eastern Greenland, and active and abandoned spreading centers in the Atlantic Ocean with the Jan Mayen microcontinent in between. However, the tectonic history of the region has generally been oversimplified. This research will reveal the crustal type (continental or oceanic) of different tectonic blocks, reconstruct their fit prior to the opening of the northern Atlantic Ocean, and provide a tectonic “snapshot” for each geologic time period. The results can help pinpoint the timing and extent of critical geological processes that affect paleoclimate, biodiversity, and initiation of oceanic water circulation. The research will be integrated with education efforts, including mini research projects in advanced geophysical classes at the University of Nebraska-Lincoln; a summer camp for high school students and underserved students from Girls Inc. of Lincoln and Omaha, NE; and five education modules that will be disseminated to educators across the nation via the Science Education Resource Center at Carleton College. Such efforts will broaden participation in STEM and cultivate a diverse and well-equipped geophysics workforce. With uncertainties in the extent of the Jan Mayen microcontinent and tectonic domains of the Norwegian margin, as well as the disputed crustal affinity of the Greenland-Iceland-Faroe Ridge, tectonic reconstruction of the Northern Atlantic region remains poorly constrained. This project will examine crustal architecture and tectonic structures of individual regions via the integration of geophysical methods with geological constraints from scientific drilling. A set of robust and comprehensive geophysical models in three individual regions of the Northern Atlantic – the Norwegian-Greenland conjugate margins, the Jan Mayen microcontinent, and the Greenland-Iceland-Faroe Ridge region – will be developed to define subsurface structures that are in agreement with multiple geophysical methods. The identified tectonic features will be traced in-between the modeled lines in all three regions using spatial analysis of potential fields, building a framework for a consequent tectonic restoration, which will provide new fundamental knowledge of the pre-Atlantic continent. Integrated with these efforts, the education goal is to promote geophysics as a career of choice by engaging diverse undergraduate, graduate, and high school students in interactive learning experiences centered around an integrated geophysical approach. These activities will promote a comprehensive multi-physics analysis that integrates publicly available datasets and enables robust and rigorous interpretations. Ultimately, a comprehensive geophysical research program will be established at a public land-grant institution that will yield graduates who are well-equipped to meet the needs of the geophysical workforce and nation.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

北方大西洋具有多种地质特征，包括冰岛下的热点，挪威和格陵兰岛东部火山丰富的被动大陆边缘，以及大西洋中活跃和废弃的扩张中心，其间有扬马延微大陆。然而，该地区的构造历史通常被过于简化。这项研究将揭示不同构造块体的地壳类型（大陆或海洋），重建它们在北方大西洋开放之前的匹配，并提供每个地质时期的构造“快照”。这些结果可以帮助确定影响古气候，生物多样性和海洋水循环启动的关键地质过程的时间和程度。这项研究将与教育工作相结合，包括内布拉斯加大学林肯分校高级地球物理课程的小型研究项目;为高中生和女孩公司服务不足的学生举办夏令营。位于内布拉斯加州的林肯和奥马哈;和五个教育模块，将通过卡尔顿学院的科学教育资源中心传播给全国各地的教育工作者。这些努力将扩大对STEM的参与，并培养一支多元化、装备精良的物理学工作队伍。由于扬马延微大陆和挪威边缘构造域范围的不确定性，以及格陵兰-冰岛-法罗海脊有争议的地壳亲缘关系，北方大西洋区域的构造重建仍然受到很大的限制。该项目将通过将地球物理方法与科学钻探的地质制约因素相结合，研究各个地区的地壳结构和构造结构。将在北方大西洋的三个单独区域--挪威-格陵兰共轭边缘、扬马延微大陆和格陵兰-冰岛-法罗海脊区域--开发一套强大而全面的地球物理模型，以确定与多种地球物理方法一致的地下结构。确定的构造特征将被跟踪之间的建模线在所有三个地区使用空间分析的潜在领域，建立一个框架，随后的构造恢复，这将提供新的基本知识的前大西洋大陆。与这些努力相结合，教育目标是通过吸引不同的本科生，研究生和高中生参与围绕综合地球物理方法的互动学习体验，促进地球物理学作为一种职业选择。这些活动将促进综合多物理场分析，整合公开可用的数据集，并实现强有力和严格的解释。最终，一个综合性的地球物理研究计划将在一个公共的赠地机构建立，这将产生毕业生谁是装备精良，以满足地球物理劳动力和国家的需要。这个奖项反映了NSF的法定使命，并已被认为是值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估的支持。