Analysis on the mechanisms of coseismic temperature negative anomaly in fault zones
文献类型：期刊论文
| 作者 | Yang XiaoQiu2,3; Lin Weiren4,5; Yeh En-Chao; Xu HeHua2,3; Xu ZiYing6 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2020 |
| 卷号 | 63期号:4页码:1422 |
| 关键词 | The mechanisms of coseismic temperature responses Coseismic stress release Surface free energy Frictional heating Chi-Chi earthquake Wenchuan earthquake Tohoku earthquake |
| DOI | 10.6038/cjg2020M0638 |
| 英文摘要 | The coseismic temperature responses can be recognized in the borehole temperature measurements in fault zones after earthquakes. It provides a unique idea and an effective mean for basic research about the friction features and seismogenic mechanisms of fault zones. Borehole temperature measurement results show that there were both positive and negative temperature anomalies that followed the 1999 Chi-Chi, 2008 Wenchuan and 2011 Tohoku earthquakes. The positive temperature anomaly (within 5 similar to 20 m away from fault slip surfaces) has been well known because of the frictional heating that occurred during coseismic faulting. However, the negative temperature anomaly (range of 20 similar to 60 m from fault slip surfaces) still has not been noted and expressly addressed. The amplitude of the negative temperature anomaly is 1/4 similar to 1/3 of that of the positive temperature anomaly; but the range of the negative temperature anomaly are 3 similar to 4 times of that of positive anomaly. In that case, the total of energy in the negative and positive areas is basically the same. Therefore, the negative anomalies in borehole temperature measurement and their causes can no longer be ignored. After a detailed analysis of several possible mechanisms of coseismic temperature negative anomalies (i. e. , differences in distribution of thermal properties, fluid migration and increase of surface free energy), it is found that only coseismic stress release is a universal mechanism that can be supported in theory, experiment and field observation. This may be the main reason for the negative temperature anomaly in fault zones after earthquakes. |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/18560]  |
| 专题 | 南海海洋研究所_中科院边缘海地质重点实验室 |
| 作者单位 | 1.Japan Agcy Marine Earth Sci & Technol, Kochi Inst Core Sample Res, Nankoku, Kochi 7838502, Japan 2.Chinese Acad Sci, Key Lab Ocean & Marginal Sea Geol, South China Sea Inst Oceanol, Guangzhou 510301, Peoples R China 3.Chinese Acad Sci, Innovat Acad South China Sea Ecol & Environm Engn, Guangzhou 510301, Peoples R China 4.Southern Marine Sci & Engn Guangdong Lab Guangzho, Guangzhou 511458, Peoples R China 5.Kyoto Univ, Grad Sch Engn, Kyoto 6158540, Japan 6.Natl Taiwan Normal Univ, Dept Earth Sci, Taibei 11677, Peoples R China 7.Minist Nat Resources, Key Lab Marine Mineral Resources, Guangzhou Marine Geol Survey, Guangzhou 510075, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang XiaoQiu,Lin Weiren,Yeh En-Chao,et al. Analysis on the mechanisms of coseismic temperature negative anomaly in fault zones[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2020,63(4):1422, 1430. |
| APA | Yang XiaoQiu,Lin Weiren,Yeh En-Chao,Xu HeHua,&Xu ZiYing.(2020).Analysis on the mechanisms of coseismic temperature negative anomaly in fault zones.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,63(4),1422. |
| MLA | Yang XiaoQiu,et al."Analysis on the mechanisms of coseismic temperature negative anomaly in fault zones".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 63.4(2020):1422. |
入库方式： OAI收割
来源：南海海洋研究所
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