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DOI | 10.1029/2020GL087739 |
Heterogeneous Fracture Slip and Aseismic‐Seismic Transition in a Triaxial Injection Test | |
Zhi Ye; Ahmad Ghassemi | |
2020-06-24 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2020 |
英文摘要 | Fault/fracture slip and induce seismicity caused by fluid injection is of major interest to subsurface science and engineering. However, some fundamental aspects of the temporal and spatial evolutions of induced seismicity remain unresolved. Here, laboratory injection‐induced shear test was conducted on a rough granite fracture with concurrent acoustic emission (AE) monitoring. The results demonstrate a sequence of aseismic‐seismic‐aseismic fracture motion during fluid injection. It is observed that the temporal evolution of AE/microseismic activities was accompanied by the changes of slip velocity, stress drop, and friction coefficient. The seismic slip phase consists of three sub‐phases, namely, 1st quasi‐static slip, dynamic slip, and 2nd quasi‐static slip. The dynamic slip corresponding with AE mainshock could be a reliable simulation of earthquake instability triggered by injection in deep crystalline rocks. In addition, slip heterogeneity controlled by fracture roughness is directly evidenced by the spatially heterogeneous distributions of AE hypocenters and fracture surface topography. |
领域 | 气候变化 |
URL | 查看原文 |
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文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/278124 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Zhi Ye,Ahmad Ghassemi. Heterogeneous Fracture Slip and Aseismic‐Seismic Transition in a Triaxial Injection Test[J]. Geophysical Research Letters,2020. |
APA | Zhi Ye,&Ahmad Ghassemi.(2020).Heterogeneous Fracture Slip and Aseismic‐Seismic Transition in a Triaxial Injection Test.Geophysical Research Letters. |
MLA | Zhi Ye,et al."Heterogeneous Fracture Slip and Aseismic‐Seismic Transition in a Triaxial Injection Test".Geophysical Research Letters (2020). |
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