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.

中山脊系统是地球表面上最大的特征。它也是大部分主动断层的地点，也是地球大部分火山活动的地点。通过海底蔓延的过程生产新的海底是一个基本过程，它塑造了地球的表面。半个世纪的研究已经揭示了有关中山山脊系统的很多信息，并且越来越重要的工具是了解中山脊的运作方式是数字建模。尽管山脊系统是三维的，但由于计算局限性，此类模型迄今已限制为二维。该项目代表了雄心勃勃的合作努力，以建立在全球范围内的中山山脊设置上的第一个真正的3D故障和岩浆作用模型（火山流程）。该项目具有多种更广泛的影响。这项研究的结果以及新的3D Visco弹性塑性构造代码的发展将使对岩石圈变形的长期研究有益，并在地球（例如，地理位置和地球景观计划）以及行星科学中广泛应用。此外，3D时间依赖性的可视化将使在正在进行的课堂教学和K-12外展活动中使用异常刺激和直观的插图。预算的大部分将支持两位才华横溢且有前途的研究生。最后，PI将与地球动力学（CIG）的计算基础架构一起记录，基准测试和分发我们的2D和3D代码，从而构成科学基础架构。