Fracture Dynamics in Geological Systems
Summary
Fracture dynamics in geological systems encompass the initiation, propagation and interaction of cracks and faults within the Earth’s crust, driven by tectonic stresses, fluid pressures and material heterogeneities. Fractures range from micro‐scale cracks to kilometre‐scale fault networks and govern the mechanical integrity of rock masses, as well as the pathways for fluid migration. The evolution of fracture networks reflects a balance between stress intensity at crack tips, rock rheology and the influence of chemical reactions that may weaken or cement fractures over geological time. Mechanical layering, anisotropy and pore‐fluid pressures control whether fractures arrest at interfaces or link into interconnected systems capable of transmitting water, hydrocarbons or magmatic fluids. Advances in high‐resolution imaging and remote sensing, combined with laboratory experiments and numerical modelling, have revealed the multiscale complexity of fracture patterns. This insight underpins improved predictions of earthquake rupture, subsurface fluid flow for geothermal and carbon‐storage applications, and the assessment of reservoir quality in sedimentary and crystalline formations worldwide.
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Fracture Dynamics in Geological Systems publication trend
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Technical terms
Fracture intensity: The total length of fractures per unit area, indicating network density and its influence on mechanical and flow properties.
Hydrofracture: A tensile‐mode crack created or propagated by fluid overpressure within rock layers, often used in reservoir stimulation.
Percolation threshold: The critical connectivity point at which an assembly of fractures becomes sufficiently linked to allow continuous fluid flow.
Fracture aperture: The separation or opening of fracture walls, which controls the transmissivity and storage capacity of the fracture.
References
- The Role of Chemistry in Fracture Pattern Development and Opportunities to Advance Interpretations of Geological Materials. Reviews of Geophysics (2019).
- Effects of mechanical layering on hydrofracture emplacement and fluid transport in reservoirs. Frontiers in Earth Science (2013).
- Rapid, semi-automatic fracture and contact mapping for point clouds, images and geophysical data. Solid Earth (SE) (2017).
- Basement reservoir plumbing: fracture aperture, length and topology analysis of the Lewisian Complex, NW Scotland. Journal of the Geological Society (2020).
- How do we see fractures? Quantifying subjective bias in fracture data collection. Solid Earth (SE) (2019).
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