Analytical Solution for the Frictional Anisotropy of a Corrugated Fault
Abstract Fault surfaces exhibit anisotropic roughness, with elongate ridges and grooves aligned in the slip direction. When inactive faults are reactivated under a new stress regime, induced by natural processes or human activities, the maximum resolved shear stress is likely to act obliquely to inh...
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| Format: | Article |
| Language: | English |
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Wiley
2025-04-01
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| Series: | Geophysical Research Letters |
| Online Access: | https://doi.org/10.1029/2024GL114281 |
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| author | Martin P. J. Schöpfer Conrad Childs |
| author_facet | Martin P. J. Schöpfer Conrad Childs |
| author_sort | Martin P. J. Schöpfer |
| collection | DOAJ |
| description | Abstract Fault surfaces exhibit anisotropic roughness, with elongate ridges and grooves aligned in the slip direction. When inactive faults are reactivated under a new stress regime, induced by natural processes or human activities, the maximum resolved shear stress is likely to act obliquely to inherited surface corrugations increasing the fault shear strength. Analytical solutions for the shear strength of a corrugated fault, idealized as a frictional serrated surface of infinite extent separating rigid blocks under any shear stress direction, have been derived. The solutions show that the shear strength increases with increasing angle between the corrugation axes and the shear stress direction, and with fault roughness. Further, the fault slip direction may deviate significantly from the maximum resolved shear stress direction toward the corrugation axes. Finally, the reactivation potential does not only depend on stress state, fault orientation and friction, but also on surface roughness and the orientation of the corrugations. |
| format | Article |
| id | doaj-art-15a699b2738249e9862812880c8f2f0c |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-15a699b2738249e9862812880c8f2f0c2025-08-20T03:44:25ZengWileyGeophysical Research Letters0094-82761944-80072025-04-01528n/an/a10.1029/2024GL114281Analytical Solution for the Frictional Anisotropy of a Corrugated FaultMartin P. J. Schöpfer0Conrad Childs1Department of Geology University of Vienna Vienna AustriaFault Analysis Group School of Earth Sciences University College Dublin Dublin IrelandAbstract Fault surfaces exhibit anisotropic roughness, with elongate ridges and grooves aligned in the slip direction. When inactive faults are reactivated under a new stress regime, induced by natural processes or human activities, the maximum resolved shear stress is likely to act obliquely to inherited surface corrugations increasing the fault shear strength. Analytical solutions for the shear strength of a corrugated fault, idealized as a frictional serrated surface of infinite extent separating rigid blocks under any shear stress direction, have been derived. The solutions show that the shear strength increases with increasing angle between the corrugation axes and the shear stress direction, and with fault roughness. Further, the fault slip direction may deviate significantly from the maximum resolved shear stress direction toward the corrugation axes. Finally, the reactivation potential does not only depend on stress state, fault orientation and friction, but also on surface roughness and the orientation of the corrugations.https://doi.org/10.1029/2024GL114281 |
| spellingShingle | Martin P. J. Schöpfer Conrad Childs Analytical Solution for the Frictional Anisotropy of a Corrugated Fault Geophysical Research Letters |
| title | Analytical Solution for the Frictional Anisotropy of a Corrugated Fault |
| title_full | Analytical Solution for the Frictional Anisotropy of a Corrugated Fault |
| title_fullStr | Analytical Solution for the Frictional Anisotropy of a Corrugated Fault |
| title_full_unstemmed | Analytical Solution for the Frictional Anisotropy of a Corrugated Fault |
| title_short | Analytical Solution for the Frictional Anisotropy of a Corrugated Fault |
| title_sort | analytical solution for the frictional anisotropy of a corrugated fault |
| url | https://doi.org/10.1029/2024GL114281 |
| work_keys_str_mv | AT martinpjschopfer analyticalsolutionforthefrictionalanisotropyofacorrugatedfault AT conradchilds analyticalsolutionforthefrictionalanisotropyofacorrugatedfault |