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吴忠–灵武地区P波三维Q值层析成像
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Abstract:
基于层析成像方法，利用宁夏测震台网中心提供的2009年1月至2021年12月的地震波形数据，对吴忠–灵武地区P波三维Q值分布特征进行了研究。结果表明：沿着黄河水系的一系列断裂比较密集的区域，Q值表现为低值状态区域，构造活动强烈；随着深度的增加，吴忠–灵武北部区域的Q值一直稳定在一个相对较低的水平，而在其南部，Q值则由低值转为高值。
Based on the tomography method, seismic wave data of January 2009 to December 2021 are col-lected from Ningxia Seismological Network Center to study the 3D Q-value distribution characte-ristics of P-wave in Wuzhong-Lingwu area. The results show that Q-value is much lower in the area where lots of faults distribute along the Yellow River. As the depth increases, Q-value remains low-level in the northern Wuzhong-Lingwu area, but it gets bigger and bigger in the southern part.
| [1] | Sato, H. (1992) Thermal Structure of the Mantle Wedge Beneath Northeastern Japan: Magmatism in an Island Arc from the Combined Data of Seismic Anelasticity and Velocity and Heat Flow. Journal of Volcanology & Geothermal Research, 51, 237-252. https://doi.org/10.1016/0377-0273(92)90125-W |
| [2] | Burgmann, R. and Dresen, G. (2008) Rheology of the Lower Crust and Upper Mantle: Evidence from Rock Mechanics, Geodesy, and Field Observations. Annual Review of Earth & Planetary Sciences, 36, 531-567.
https://doi.org/10.1146/annurev.earth.36.031207.124326 |
| [3] | Sato, H. and Fehler, M.C. (1998) Seismic Wave Propagation and Scattering in the Heterogeneous Earth. Springer, Berlin. https://doi.org/10.1007/978-1-4612-2202-6 |
| [4] | Savage, B., Komatitsch, D. and Tromp, J. (2010) Effects of 3D Attenuation on Seismic Wave Amplitude and Phase Measurements. Bulletin of the Seismological Society of America, 100, 1241-1251. https://doi.org/10.1785/0120090263 |
| [5] | 刘翰林, 吴庆举. 大兴安岭诺敏河火山群远震P波衰减研究[J]. 地球物理学报, 2021, 64(1): 157-169. |
| [6] | 赵卫明, 刘秀景, 马禾青. 宁夏及邻区尾Q值分布特征[J]. 华南地震, 2002, 22(1): 23-27. |
| [7] | 贺永忠, 师海阔, 朱新运, 张立恒. 利用两种模型对宁夏及邻区尾波Q值进行对比研究[J]. 大地测量与地球动力学, 2012, 32(z1): 10-17. |
| [8] | 安艺敬一. 定量地震学[M]. 北京: 地震出版社, 1986. |
| [9] | 惠少兴, 张元生, 李顺成. t-D地震定位方法研究[J]. 西北地震学报, 2012, 34(1): 10-13. |
| [10] | 高见. 甘东南地区三维Q值研究[D]: [硕士学位论文]. 兰州: 中国地震局兰州地震研究所, 2013. |
| [11] | 李青梅, 张元生, 吕俊强, 等. 宁夏地区小震重定位[J]. 地震工程学报, 2015(2): 518-524. |
| [12] | 杨明芝, 马禾青, 廖玉华. 宁夏地震活动与研究[M]. 北京: 地震出版社, 2007. |
| [13] | 张振法, 李超英, 牛颖智. 阿拉善——敦煌陆块的性质、范围及其构造作用和意义[J]. 内蒙古地质, 1997(2): 1-14. |
