Peacock D C P, Sanderson David J, Leiss Bernd
Geoscience Centre of the University of Göttingen, Structural Geology & Geodynamics, Goldschmidtstraße 3, 37077 Göttingen, Germany.
Ocean and Earth Science, University of Southampton, National Oceanography Centre, Southampton SO14 3ZH, UK.
iScience. 2024 Jun 14;27(8):110272. doi: 10.1016/j.isci.2024.110272. eCollection 2024 Aug 16.
Mohr diagrams are a simple and effective method that can help geoscientists consider, model, and predict the ranges of mechanical properties of rock, stresses, fluid pressures, and the resultant fractures that are likely to occur in the sub-surface. Mohr diagrams can be used to make predictions about how rocks may respond to change, with a transition from a stable state to fracturing occurring if there are changes in (1) the failure envelope, (2) stresses, and/or (3) fluid pressure. This article uses Mohr diagrams to address two questions of significance to the energy transition. First, how will metasedimentary rocks, which are potential geothermal reservoir rocks, respond to thermal stimulation? Second, will fractures that may influence the underground storage of radioactive waste develop in a clay sequence during exhumation? Mohr diagrams are shown to be useful for highlighting misconceptions and input data problems, leading to improved understanding of how structures develop.
莫尔图是一种简单有效的方法，可帮助地球科学家考虑、模拟和预测岩石的力学性质范围、应力、流体压力以及地下可能出现的 resultant fractures（此处 resultant fractures 可直译为“ resultant 裂缝”，但在地质领域可能有更专业的表述，需结合上下文进一步确定其准确含义）。莫尔图可用于预测岩石如何响应变化，如果在（1）破坏包络线、（2）应力和/或（3）流体压力方面发生变化，岩石可能会从稳定状态转变为破裂状态。本文使用莫尔图来解决对能源转型具有重要意义的两个问题。第一，作为潜在地热储层岩石的变质沉积岩将如何响应热刺激？第二，在挖掘过程中，可能影响放射性废物地下储存的裂缝会在黏土层序中形成吗？结果表明，莫尔图有助于突出误解和输入数据问题，从而增进对构造如何形成的理解。
