Accomplishment Based Renewal: Numerical Modeling of Coupled Magma-Hydrothermal Processes at Oceanic Spreading Centers Including Magma Replenishment and Phase Separation

基于成就的更新：海洋扩张中心岩浆-热液耦合过程的数值模拟，包括岩浆补给和相分离

• 批准号: 0926418
• 负责人: Robert Lowell
• 金额: $ 28.86万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0926418&HistoricalAwards=false
• 关键词: Accomplishment; Based; Renewal; Numerical; Modeling

Magma-hydrothermal processes at oceanic spreading centers are an important component of Earth's thermal regime and play a critical role in cycling major and minor chemical constituents between the oceans and the crust. These processes lead to the formation metallic ore deposits and provide nutrients for unique and diverse microbial and macrofaunal ecosystems on the sea floor. This research uses the recently developed numerical modeling code, FISHES, to develop the first set of models that link time-dependent convection, crystallization, and replenishment of a magma body at an oceanic spreading center with multiphase hydrothermal fluid circulation in the oceanic crust. The work provides an essential, holistic, and presently lacking quantitative framework for understanding decades of observations of seafloor hydrothermal systems. It will also provide insight into magma-hydrothermal interactions and heat transfer at oceanic spreading centers. Of broader importance, these models will provide a necessary starting point for linking hydrothermal circulation with complex biogeochemical processes at oceanic spreading centers. It will also train a student in state-of-the-art modeling techniques.

海洋扩散中心的岩浆热液过程是地球热状态的重要组成部分，在海洋和地壳之间主要和次要化学成分的循环中发挥着关键作用。 这些过程导致金属矿床的形成，并为海底独特且多样化的微生物和大型动物生态系统提供营养。 这项研究使用最近开发的数值模拟代码 FISHES 开发了第一组模型，将海洋扩张中心的岩浆体的时间依赖性对流、结晶和补充与海洋地壳中的多相热液循环联系起来。这项工作为理解几十年来对海底热液系统的观测提供了一个重要的、全面的、目前缺乏的定量框架。 它还将深入了解海洋扩散中心的岩浆-热液相互作用和传热。更重要的是，这些模型将为将热液循环与海洋扩散中心的复杂生物地球化学过程联系起来提供必要的起点。 它还将为学生提供最先进的建模技术培训。