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| 2020年新疆于田MS6.4地震发震断层及孕震机制研究 | |
| 引用本文： | 王勤彩,李君,张金川. 2020年新疆于田MS6.4地震发震断层及孕震机制研究[J]. 地震, 2021, 41(2): 92-101. DOI: 10.12196/j.issn.1000-3274.2021.02.007 |
| 作者姓名： | 王勤彩 李君 张金川 |
| 作者单位： | 1.中国地震局地震预测研究所, 北京 100036; 2.中国地震局第二监测中心, 陕西 西安 710054; 3.江苏省地震局, 江苏 南京 210014 |
| 基金项目： | 中国地震局地震预测研究所基本科研业务费专项(2020IEF0602); 中国地震局三结合课题(3JH-202001030) |
| 摘 要： | 利用2020年6月26日于田MS6.4地震序列的震相和波形数据, 对地震序列进行重定位并反演了中强地震的震源机制解, 结合2008年至今的全球矩心矩张量解数据, 反演了西昆仑块体和柴达木—祁连块体间边界地区的应力场。 综合分析研究结果发现: 2020年6月26日于田MS6.4地震序列的发震断层为走向SSW, 倾向NWW的正断层, 地震的发生可能与琼木孜塔格峰山前展布的正断层破裂有关; 西昆仑块体和柴达木—祁连块体之间的边界地区属于东西向拉张应力模式, 支持青藏高原北部大型走滑断裂所圈定的柴达木—祁连块体的东向运动模型。 |
| 关 键 词： | 发震断层 孕震机制 2020年新疆于田MS6.4地震 |
| 收稿时间： | 2021-01-27 |
| 修稿时间： | 2021-03-02 |
The Earthquake Fault and Seismogenic Mechanism of the Yutian Ms6.4 Earthquake in Xinjiang,China in 2020 |
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| WANG Qin-cai,LI Jun,ZHANG Jin-chuan. The Earthquake Fault and Seismogenic Mechanism of the Yutian Ms6.4 Earthquake in Xinjiang,China in 2020[J]. China Earthguake Engineering Journal, 2021, 41(2): 92-101. DOI: 10.12196/j.issn.1000-3274.2021.02.007 | |
| Authors: | WANG Qin-cai LI Jun ZHANG Jin-chuan |
| Affiliation: | 1. Institute of earthquake forcasting, CEA, Beijing 100036, China; 2. The Second Monitoring and Application Center, CEA, Xi’an 710054, China; 3. Earthquake Administration of Jiangsu Province, Nanjing 210014, China |
| Abstract: | By the seismic phase and waveform data of the Yutian MS6.4 earthquake sequence occurred on June 26th, 2020, earthquakes are relocated and the focal mechanism solutions of moderate and strong earthquakes are inversed. Using the Global Centroid-Moment-Tensor (GCMT) data from 2008 to present, the stress field in the boundary area between the West Kunlun block and the Qaidam-Qilian block is inversed. The results show that the seismogenic fault of Yutian MS6.4 earthquake sequence on June 26, 2020 is a strike-SSW, dipping NWW normal fault, and the occurrence of MS6.4 earthquake may be related to the rupture of normal fault in front of the Ulugh Muztagh mountain. The boundary area between the West Kunlun block and the Qaidamu-Qilian block is in the consistent status with the east-west tensile stress model, which supports the eastward movement model that the Qaidamu-Qilian block delineated by the large strike-slip fault in the northern part of the Qinghai-Tibet Plateau. |
| Keywords: | Earthquake fault Seismogenic mechanism The Yutian MS6.4 earthquake in Xinjiang in 2020 |
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