Collaborative Research: 3D Geodynamic Models of Tectono-Magmatic Extension at Mid-Ocean Ridges: Variations in Magmatism, Faulting, and Morphology at the Segment Scale

合作研究：大洋中脊构造岩浆伸展的 3D 地球动力学模型：分段尺度上岩浆活动、断层和形态的变化

• 批准号: 1155098
• 负责人: Garrett Apuzen-Ito
• 金额: $ 22.97万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-04-01 至 2017-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1155098&HistoricalAwards=false
• 关键词: Collaborative; Research; 3D; Geodynamic; Models

The mid-ocean ridge system is the largest feature on the surface of the Earth. It is also the site of much active faulting, and of most of the Earth's volcanic activity. The production of new seafloor by the process of seafloor spreading is a fundamental process that shapes the planet's surface. A half-century's research has revealed much about the mid-ocean ridge system, and an increasingly important tool for understanding the workings of mid-ocean ridges is numerical modeling. Though the ridge system is three dimensional, such models have, up to now, been limited to two dimensions owing to computing limitations. This project represents an ambitious collaborative effort to build the first genuinely 3D models of faulting and magmatism (volcanic processes) over a global range of mid-ocean ridge settings. This project has a variety of broader impacts. The results of this study and the development of a new 3D visco-elasticplastic tectonics code will benefit studies of long-term lithospheric deformation generally, with broad applications in Earth (e.g., GeoPRISMS and Earthscope programs) as well as planetary science. In addition, 3D time-dependent visualizations will make exceptionally stimulating and intuitive illustrations for use in ongoing classroom instructional and K-12 outreach activities. Most of the budget will support two talented and promising graduate students. Finally, the PIs will work with the Computational Infrastructure for Geodynamics (CIG) to document, benchmark, and disseminate both our 2D and 3D codes, thereby contributing the the scientific infrastructure.

大洋中脊系统是地球表面最大的特征。它也是许多活跃断层的所在地，也是地球上大部分火山活动的所在地。海底扩张过程产生新海底是塑造地球表面的基本过程。半个世纪的研究揭示了有关洋中脊系统的许多信息，而数值模拟是了解洋中脊运作方式的一个日益重要的工具。尽管山脊系统是三维的，但迄今为止，由于计算限制，此类模型仅限于二维。该项目代表了一项雄心勃勃的合作努力，旨在在全球范围的洋中脊环境中构建第一个真正的断层和岩浆作用（火山过程）3D 模型。该项目具有多种更广泛的影响。这项研究的结果和新的 3D 粘弹塑性构造代码的开发将有利于长期岩石圈变形的研究，在地球（例如 GeoPRISMS 和 Earthscope 程序）以及行星科学中具有广泛的应用。此外，3D 时间相关可视化将提供异常刺激和直观的插图，用于正在进行的课堂教学和 K-12 外展活动。大部分预算将用于支持两名才华横溢、有前途的研究生。最后，PI 将与地球动力学计算基础设施 (CIG) 合作，记录、基准测试和传播我们的 2D 和 3D 代码，从而为科学基础设施做出贡献。