Continued Mathematical Modeling of Seafloor Hydrothermal Systems: Fracture Mechanics, Heat Transfer, and the Evolution of Permeability

该奖项是对pi继续开发海底热液过程数学模型的一种基于成就的更新。该奖项将支持分为两个主要科学主题的建模研究：稳定性和时间变异性。这些模型将与观测密切相关，并且，希望这些模型预测将指导后续的实地工作。稳定性的主题解决了基本方面的传热跨越基底边界层。主要目标是建立一个断裂力学模型，该模型可以产生与观测一致的脊顶系统中的热量和质量传递，并解决热液系统底部裂缝的稳定性和扩展问题。时间变率主题涉及以下过程：(a)热的深循环热液与较冷的浅循环海水混合导致的渗透率演化；(b)热液系统对地震的响应。这些模式的发展将与各种数据集密切相关，包括来自EPR 9- 10N、南EPR和Juan de Fuca Ridge的热数据和同位素数据。本研究中心对两名本科生的培训和教育、RIDGE 2000综合研究（IS）计划的支持以及研究成果的广泛传播的更广泛影响。

This award is an Accomplishment-Based Renewal for the PIs to continue to develop mathematical models of seafloor hydrothermal processes. The award will support modeling studies divided into two main scientific themes: Stability and Temporal Variability. The models will be strongly linked to observations, and, hopefully, the model predictions will guide subsequent field efforts. The Stability theme addresses fundamental aspects of heat transfer across the basal boundary layer. The main objective is to develop a fracture mechanics model that yields heat and mass transfer in ridge crest systems that is consistent with observations and that addresses the stability and propagation of fractures at the base of the hydrothermal system. The Temporal Variability theme addresses processes of: (a) permeability evolution resulting from mixing between hot deep-circulating hydrothermal fluids and cooler, shallowly circulating seawater and (b) hydrothermal system response to earthquakes. Development of these models will be closely linked to various data sets including thermal and isotopic data from the EPR 9- 10N, the Souther EPR, and the Juan de Fuca Ridge. The Broader Implications of this research center on the training and education of both undergraduate students, suport of the RIDGE 2000 Integrated Studies (IS) program, and broa dissemination of research results.