Collaborative Research: The Role of the Porcupine Fault System in the Mesozoic Opening of the Arctic Ocean

合作研究：豪猪断层系统在北冰洋中生代张开中的作用

• 批准号: 2314533
• 负责人: Margaret Odlum
• 金额: $ 26.1万
• 依托单位: University of Nevada Las Vegas
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-09-01 至 2023-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2314533&HistoricalAwards=false
• 关键词: Collaborative; Research; Role; Porcupine; Fault

Despite its proven economic resources, the Arctic Ocean is the last modern ocean basin on the planet whose origin remains highly controversial. This is largely due to its perennial ice cover and lack of detailed scientific examination by shipborne research vessels. The goal of the proposed research is to examine the Porcupine fault system in northeastern Alaska and northwestern Yukon, Canada, which likely played an important, yet poorly understood, role in the opening of the Arctic Ocean. The study promotes a new collaboration between early career and senior academic researchers at four U.S. institutions and government research agencies in both the United States and Canada, including the development of a new geologic mapping effort across the international border. The collaborative international effort will generate research opportunities and training for undergraduate and graduate students at the academic institutions, as well as educational and outreach opportunities in a rural Native Alaskan community in collaboration with the United States Fish and Wildlife Service and Las Vegas, NV, through integration with the NSF-supported GeoPaths program. Results of the project will also be conveyed to the public through the development of an informational pamphlet sponsored and distributed by the U.S. Fish and Wildlife Service in Alaska, as well as accessible public lectures at the participating universities.The canonical tectonic model for the opening of the Canada Basin of the Arctic Ocean involves greater than 60º counterclockwise rotation of northern Alaska away from the Canadian Arctic Islands in the Jurassic–Cretaceous, but more recent models highlight potentially significant strike-slip displacement along the northern margin of North America. Critically, little is known about the fault systems that may have accommodated these margin-parallel displacements. The goal of the proposed research is to examine the Porcupine fault system, a long-lived craton-bounding structure in northeastern Alaska and northwestern Yukon, Canada, that has a poorly understood Mesozoic–Cenozoic reactivation history but likely played a role in the opening of the Canada Basin. The reflects a new collaboration between Early Career and senior academic researchers, federal and state/territory geoscientists, and undergraduate/graduate students that will not only further our understanding of Mesozoic–Cenozoic tectonic and paleogeographic models for the circum-Arctic, northern Pacific, and northern North American Cordillera, but it will also provide new insights into the dynamics and chronology of crustal deformation in polyphase brittle fault systems. In addition, the research will test the utility and feasibility of combining multiple established and new fault geo- and thermo-chronometers to these complex systems. As a result, this project will generate broad interest from the tectonics, structural geology, and geo-/thermo-chronology communities, as well as cross-disciplinary interest in Arctic sciences, economic geology, sedimentary geology, petrology, geophysics, and geodynamics.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.

尽管经过经过证实的经济资源，北极海洋是地球上最后一个现代海洋盆地，其起源仍然引起极大的争议。这在很大程度上是由于其多年生冰覆盖，并且缺乏造船研究船的详细科学检查。拟议的研究的目的是检查阿拉斯加北部和加拿大西北部的豪猪断层系统，这些系统可能在北极海洋开放中起着重要但知之甚少的作用。该研究促进了美国和加拿大四个机构和政府研究机构的早期职业与高级学术研究人员之间的新合作，包括在整个国际边界开发了新的地质映射工作。国际协作努力将为学术机构的本科生和研究生提供研究机会和培训，以及与美国鱼类和野生动物服务局以及内华达州拉斯维加斯的农村土著社区的教育和外展机会，通过与NSF支持的Geopaths Geopaths计划合作。该项目的结果还将通过开发由美国鱼类和野生动物服务局赞助和分发的信息小册子，以及参与大学的可访问的公开讲座。侏罗纪 - 白垩纪，但最近的模型突出了北美北部边缘的潜在显着滑移流离失所。至关重要的是，对于可能容纳这些边缘并行位移的断层系统知之甚少。拟议的研究的目的是检查豪猪断层系统，这是阿拉斯加北部和加拿大西北部育空地区长期存在的克拉通结构，该结构知之甚少，中世代 - 富集的重新激活史，但可能在开放式的加拿大盆地开放中起作用。这反映了早期职业与高级学术研究人员，联邦和州/领土地球科学家以及本科/研究生之间的新合作，这不仅将进一步了解我们对中生代元素的构造和北太平洋，北太平洋以及北美北美山脉的中生代构造和古地理模型，还将为动态系统提供新的洞察力和精力。此外，该研究将测试将多个已建立和新的断层地理和热基因计算机与这些复杂系统相结合的效用和可行性。结果，该项目将对北极科学，经济地质学，沉积地质学，岩石学，地质学，地球物理学和地质动力学的跨学科概念和跨学科的概述，通过评估NSF的智力范围的智力，对北极科学，质地质学，地球物质学和地质奖，对北极科学，经济地质学，地质学，地质学，地质学，地质学，地质学，地质学，地质学，地质学，地质学，地质学，地质学，地质学，地质学，地球学，地质学，地质学，地质学，地质学，地质学，地质学，地质学，地质学，地质学，地质学，地质学，地质学，地质学，地质学，地质学和跨学科的兴趣，都将产生广泛的兴趣。 标准。