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Stress Perturbation |
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Stresses are transmitted through material without perturbation as long as the material is mechanically isotropic. This is rarely the case in nature. The stress field is often perburbated in both magnitude and orientation in the vicinity of mechanical heterogeneity such as faults. The sketch of the left below illustrates that point. The progressive rotation of both extensional fractures and stylolitic joints show that σ1 (red trajectories) and σ3 (blue trajectories) rotate around σ2 in the vicinity of the fault. |
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Below, two examples of stress peturbation due to the overlapping of faults. |
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