GeoPRISMS synthesis workshop: Extensional Processes Across Tectonic Settings and Time Scales

GeoPRISMS 综合研讨会：跨构造环境和时间尺度的伸展过程

• 批准号: 2025577
• 负责人: Dennis Harry
• 金额: $ 10.39万
• 依托单位: Colorado State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-09-01 至 2024-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2025577&HistoricalAwards=false
• 关键词: GeoPRISMS; synthesis; workshop; Extensional; Processes

A workshop will be held to develop a community driven vision for NSF-funded research that focuses on extensional deformation of the Earth. Stretching of Earth’s strong upper layer is a fundamental aspect of Plate Tectonics. Zones of stretching are ubiquitous features of tectonic plate boundaries, and include mid-ocean ridges where two-thirds of our planet’s surface is created; narrow continental rifts where plates break apart such as the East African Rift; broad continental extensional provinces such as the North American Basin and Range, and rift basins that form near collisional and transform plate boundaries. Extension has occurred throughout Earth’s history, resulting in deformation, magmatism, and fluid cycling that has produced economic mineral deposits of all ages, fossil fuel and geothermal energy resources, shaped modern riverways and their surrounding ecosystems, and accounts for many of Earth’s groundwater resources and volcanic, earthquake, and landslide hazards. Previous initiatives (RIDGE 2000, MARGINS, GeoPRISMS) produced new understandings of extensional systems that were derived from focused studies of processes occurring at a relatively few specific study sites. The proposed workshop will provide a forum for synthesis and consolidation of lessons learned from these site-specific programs, and will use that to establish a springboard for the next generation of research. The workshop will gather representatives from a range of Earth science disciplines. The workshop will seek to identify research pathways that maximize contributions to hazard mitigation, resource assessment, science literacy, and demographic diversity in STEM disciplines. A 3.5 day workshop will be held on the broad theme of extensional deformation of the Earth’s lithosphere. Extension is a fundamental tectonic process. Zones of divergence are ubiquitous features of tectonic plate boundaries, including the mid-ocean ridges where two-thirds of our planet’s surface is created, narrow continental rifts such as the East African Rift, broad continental extensional provinces such as the North American Basin and Range, and even adjacent to compressional and strike-slip plate boundaries where extensional back-arc basins and pull-apart basins form. Extension is a primary driver of chemical and thermal disequilibrium and establishes gradients in composition, temperature, and gravitational potential that drive volatile cycling and mass transport on both global and extremely localized scales, with profound consequences for material and geothermal resources, as well as hazards. Previous NSF programs (RIDGE 2000, MARGINS, GeoPRISMS) have produced new data, models, experimental work, and understandings derived from focused studies of extensional processes within specific tectonic settings and study sites. The proposed workshop will provide a forum for synthesis and consolidation of lessons learned from these previous programs, and will establish a springboard for the next generation of research. The workshop’s purpose is to reposition the research community for an integrative investigative approach that leverages geographically disparate observations to illuminate common processes within extensional systems and their shared underlying mechanisms. As such, a key component of the workshop is to make explicit the commonalities between continental, marginal, and mid-ocean rift and ridge environments. The workshop provides a forum to link these hitherto mostly separate research communities and develop a common language to help explore common underlying dynamics through new collaborations. The workshop will gather representatives from multiple Earth science communities to synthesize the most recent generation of research results, and to develop a vision for more integrative process-oriented research in the coming decade. The workshop will emphasize participation of early career scientists and will prioritize the societal relevance of scientific research by seeking to identify pathways that maximize contributions to hazard mitigation, resource assessment, and science literacy, and to demographic diversity in STEM disciplines. The community-driven vision for future NSF-funded cross-disciplinary research into lithospheric extensional systems will be captured in a “white paper” written at the conclusion of the workshop that is intended to serve as a catalyst for future NSF-funded research into extensional systems and processes.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.

将举办一个研讨会，为NSF资助的研究制定一个社区驱动的愿景，重点是地球的伸展变形。地球坚固的上层的拉伸是板块构造学的一个基本方面。伸展带是构造板块边界的普遍特征，包括海洋中脊，我们地球表面的三分之二被创造出来;狭窄的大陆裂谷，如东非裂谷;广泛的大陆伸展省份，如北美盆地和山脉，以及在碰撞和转换板块边界附近形成的裂谷盆地。伸展作用贯穿了地球的历史，导致了变形、岩浆作用和流体循环，产生了各个时代的经济矿藏、化石燃料和地热能源，塑造了现代河流及其周围的生态系统，并造成了地球的许多地下水资源和火山、地震和滑坡灾害。以前的倡议（脊2000年，边缘，GeoPRISMS）产生了新的理解的延伸系统，来自集中研究的过程中发生在相对较少的具体研究地点。拟议的讲习班将提供一个论坛，综合和巩固从这些具体地点的方案中吸取的经验教训，并将利用这一点为下一代研究奠定基础。讲习班将汇集来自地球科学各学科的代表。研讨会将寻求确定研究途径，最大限度地促进减灾，资源评估，科学素养和STEM学科的人口多样性。将举行一个为期3.5天的研讨会，主题是地球岩石圈的伸展变形。伸展是一个基本的构造过程。发散带是构造板块边界的普遍特征，包括占地球表面三分之二的大洋中脊，狭窄的大陆裂谷（如东非裂谷），广阔的大陆伸展区（如北美海盆和山脉），甚至邻近挤压和走滑板块边界，伸展弧后盆地和拉分盆地形成。延伸是化学和热不平衡的主要驱动力，并建立了成分，温度和重力势的梯度，这些梯度驱动了全球和极端局部尺度上的挥发性循环和质量传输，对材料和地热资源以及危害产生了深远的影响。以前的NSF计划（RIDGE 2000，MARGINS，GeoPRISMS）已经产生了新的数据，模型，实验工作，并从特定构造环境和研究地点的拉伸过程的重点研究中获得的理解。拟议的讲习班将提供一个论坛，综合和巩固从这些以前的方案中吸取的经验教训，并将为下一代研究奠定基础。该研讨会的目的是重新定位研究界的综合调查方法，利用地理上不同的意见，以阐明扩展系统及其共享的基本机制内的共同过程。因此，讲习班的一个关键组成部分是明确大陆、边缘和洋中裂谷和洋脊环境之间的共同点。该研讨会提供了一个论坛，将这些迄今为止大多数独立的研究团体联系起来，并开发一种共同语言，以帮助通过新的合作探索共同的基本动态。讲习班将汇集来自多个地球科学界的代表，综合最新一代的研究成果，并为未来十年更加综合的面向过程的研究制定愿景。研讨会将强调早期职业科学家的参与，并将通过寻求确定最大限度地促进减灾，资源评估和科学素养以及STEM学科人口多样性的途径，优先考虑科学研究的社会相关性。未来NSF资助的岩石圈伸展系统跨学科研究的社区驱动愿景将在研讨会结束时撰写的“白色论文”中获得，该论文旨在作为未来NSF的催化剂。该奖项反映了NSF的法定使命，并被认为值得通过使用基金会的智力价值和更广泛的评估来支持。影响审查标准。