Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL074555 |
Elastic Anisotropy Reversal During Brittle Creep in Shale | |
Geng, Zhi1,2; Bonnelye, Audrey3; Chen, Mian1; Jin, Yan1; Dick, Pierre4; David, Christian5; Fang, Xin1; Schubnel, Alexandre2 | |
2017-11-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:21 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; France |
英文摘要 | We conducted two brittle creep experiments on shale samples under upper crustal conditions (confining pressure of 80 MPa at 26 degrees C and 75 degrees C). We deformed the samples to failure, with bedding oriented perpendicular to the maximum compressive stress direction, using the stress-stepping methodology. In both experiments, the failure stress was similar to 64% higher than the short-term peak strength. Throughout each differential stress step, ultrasonic wave velocities initially decreased and then gradually increased with deformation/time. The magnitude of these variations depends both on the direction of measurement with respect to the bedding and the temperature, and it is largest for velocities measured parallel to the bedding and at high temperature. Elastic wave anisotropy was completely reversed at 75 degrees C, following a limited amount of axial strain (similar to 0.6%). Scanning electron microscope investigation confirmed evidence of a time-dependent pressure solution, localized compaction, crack sealing/healing, and mineral rotation. Our observations reveal that elastic anisotropy can evolve rapidly in both time and space, which has implications on the stress state and its rotation near fault zones. |
英文关键词 | creep pressure solution strength recovery anisotropy acoustics |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000418572900019 |
WOS关键词 | PRESSURE SOLUTION CREEP ; UPPERMOST CRUSTAL CONDITIONS ; TIME-DEPENDENT DEFORMATION ; VELOCITY ANISOTROPY ; WAVE ANISOTROPY ; SLIP ZONE ; ROCKS ; STRESS ; DAMAGE ; LIMESTONE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/26987 |
专题 | 气候变化 |
作者单位 | 1.China Univ Petr, State Key Lab Petr Resources & Engn, Beijing, Peoples R China; 2.PSL Res Univ, Lab Geol ENS, UMR 8538, Paris, France; 3.Univ Paris Saclay, CNRS, Ecole Polytech, LMS, Palaiseau, France; 4.Inst Radioprotect & Surete Nucl, Fontenay Aux Roses, France; 5.Univ Cergy Pontoise, Dept Geosci & Environm, Cergy Pontoise, France |
推荐引用方式 GB/T 7714 | Geng, Zhi,Bonnelye, Audrey,Chen, Mian,et al. Elastic Anisotropy Reversal During Brittle Creep in Shale[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(21). |
APA | Geng, Zhi.,Bonnelye, Audrey.,Chen, Mian.,Jin, Yan.,Dick, Pierre.,...&Schubnel, Alexandre.(2017).Elastic Anisotropy Reversal During Brittle Creep in Shale.GEOPHYSICAL RESEARCH LETTERS,44(21). |
MLA | Geng, Zhi,et al."Elastic Anisotropy Reversal During Brittle Creep in Shale".GEOPHYSICAL RESEARCH LETTERS 44.21(2017). |
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