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

该奖项是一个基于成就的更新，为PI继续开发海底热液过程的数学模型。 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，希望模型预测将指导随后的实地工作。 稳定性的主题解决了基本方面的热传递通过底部边界层。 主要目的是开发一个断裂力学模型，产生热量和质量转移的脊波峰系统，是一致的观察，并解决了稳定性和传播的裂缝在该基地的热液系统。 时间变异性主题涉及以下过程：（a）热的深循环热液流体与较冷的浅循环海水混合造成的渗透性演变;（B）热液系统对地震的反应。 这些模型的开发将与各种数据集密切相关，包括EPR 9- 10 N，Southern EPR和Juan de Fuca Ridge的热和同位素数据。 该研究中心对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的影响。

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.