Preprints
https://doi.org/10.5194/egusphere-2023-1567
https://doi.org/10.5194/egusphere-2023-1567
14 Aug 2023
 | 14 Aug 2023

Prediction of Crustal Dynamics for the Yishu Fault Zone Based on Slip Susceptibility Analysis

Guiyun Gao, Pu Wang, Chenghu Wang, and Chengwei Yang

Abstract. We estimate the slip susceptibility of faults in the Yishu fault zone using a slip tendency analysis based on coupled tectonic stress profiles. Studying in situ stress data and focal mechanism solution data collected in this area over more than 30 years, we construct the stress profiles of the study area using the coupling analysis method for deep and shallow stress data. Subsequently, the slip susceptibility of the faults is comprehensively evaluated based on various stress indicators and other related influencing factors. Our results show that μm is low in the deep and shallow crust of the Yishu fault zone, indicating a relatively low degree of overall stress accumulation. A comprehensive evaluation of the susceptibility of fault slips based on five typical influencing factors (μm, K, θ, S-wave velocity, and seismic density) indicates that the overall seismic risk in the central part of the Yishu fault zone is not high, while the northwestern Yishu fault zone exhibits high seismic risk. The southeastern part of the Yishu fault zone reflects the transition from medium to low seismic risk. These results provide geomechanical and fault mechanics evidence for evaluating the regional crustal dynamics of the Yishu fault zone.

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Guiyun Gao, Pu Wang, Chenghu Wang, and Chengwei Yang

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2023-1567', Anonymous Referee #1, 07 Oct 2023
  • RC2: 'Comment on egusphere-2023-1567', Anonymous Referee #2, 12 Nov 2023

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2023-1567', Anonymous Referee #1, 07 Oct 2023
  • RC2: 'Comment on egusphere-2023-1567', Anonymous Referee #2, 12 Nov 2023
Guiyun Gao, Pu Wang, Chenghu Wang, and Chengwei Yang
Guiyun Gao, Pu Wang, Chenghu Wang, and Chengwei Yang

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Short summary
We estimate the slip susceptibility of the faults in the Yishu fault zone based on slip tendency analysis based on coupled tectonic stress profiles. Results show that the overall stress accumulation degree is relatively low. The overall seismic risk is not high in the study area, while a transition zone of seismic risk from medium to low exists in the southeastern part of Yishu fault zone. These results provide geomechanical evidence for evaluating the regional crustal dynamics.