首页> 外文期刊>Surveys in Geophysics: An International Review Journal of Geophysics and Planetary Sciences >Coupled Models of Brittle-plastic Deformation and Fluid Flow: Approaches, Methods, and Application to Mesoproterozoic Mineralisation at Mount Isa, Australia
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Coupled Models of Brittle-plastic Deformation and Fluid Flow: Approaches, Methods, and Application to Mesoproterozoic Mineralisation at Mount Isa, Australia

机译:脆塑性变形与流体耦合模型:澳大利亚伊萨山中元古生代成矿的方法,方法和应用

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摘要

Rock deformation has an important effect on the spatial distribution and temporal evolution of permeability in the Earth's crust. Hydromechanical coupling is of fundamental significance to natural fluid-rock interaction in porous and fractured hydrothermal systems, and in the assessment and production of hydrocarbon resources and geothermal energy. Shearing and fracturing of rocks can lead to the creation or destruction of permeability when fractures or faults form, or when existing structures are reactivated. Changes in stress orientation or fluid pressure can drive rock failure and create dilating fault zones that have the potential to focus fluid flow, or to breach seals above overpressured fluid compartments. Here, numerical models of deformation and fluid flow related to Mesoproterozoic copper mineralisation at Mount Isa, Australia, are presented that show how changes in deformation geometry in multiply deformed geological architectures relate to changes in dilation patterns, fluid pathways and flow geometry. Coupled numerical simulations of deformation and fluid flow can be useful tools to better understand structural control on fluid flow in hydrothermal mineral systems.
机译:岩石变形对地壳渗透率的空间分布和时间演化具有重要影响。流体力学耦合对于多孔和压裂热液系统中的自然流体-岩石相互作用以及碳氢化合物资源和地热能的评估和生产具有根本意义。当形成裂缝或断层或重新激活现有结构时,岩石的剪切和破裂会导致渗透性的产生或破坏。应力方向或流体压力的变化会导致岩石破裂并形成扩张断层带,从而可能集中流体流动或破坏超压流体隔层上方的密封。在这里,提出了与澳大利亚伊萨山中元古代铜矿化有关的变形和流体流动的数值模型,这些模型显示了多重变形地质构造中的变形几何形状的变化如何与扩张模式,流体路径和流动几何形状的变化相关。变形和流体流动的耦合数值模拟可以成为有用的工具,以更好地了解热液矿物系统中流体流动的结构控制。

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