| 新疆地区环境噪声层析成像研究 |
| |
| 引用本文： | 唐小勇, 范文渊, 冯永革, 唐有彩, 陈永顺, 朱丽霞. 新疆地区环境噪声层析成像研究[J]. 地球物理学报, 2011, 54(8): 2042-2049, doi: 10.3969/j.issn.0001-5733.2011.08.011 |
| |
| 作者姓名： | 唐小勇 范文渊 冯永革 唐有彩 陈永顺 朱丽霞 |
| |
| 作者单位： | 1. 北京大学地球与空间科学学院理论与应用地球物理研究所,北京 100871; 2. 重庆市地震局,重庆 401147 |
| |
| 基金项目： | 国家自然科学基金委项目(90814002,40821062),重庆市科技攻关计划项目(CSTC,2008AB0095)资助. |
| |
| 摘 要： | 本文利用北京大学宽频带流动地震台阵和新疆地震监测台网12个月连续地震记录数据,采用环境噪声层析成像方法获得了新疆地区的周期从10~35 s范围内的瑞利面波相速度异常分布图像.研究结果与地表地质构造相一致,新疆地区的天山、两盆大地构造与瑞利面波相速度异常有较好的对应关系.短周期10~20 s的图像显示两个盆地内都呈现低速异常,对应盆地较厚的沉积层.中长周期25~35 s的层析成像结果显示东西天山地区存在明显异常差异.本文获得的新疆地区地壳和上地幔相速度结果,也为进一步结合传统天然地震面波成像方法,最终获得新疆地区的三维剪切波速度结构奠定基础.
|
| 关 键 词： | 新疆 Rayleigh面波 环境噪声 层析成像 |
| 收稿时间： | 2010-06-07 |
| 修稿时间： | 2011-07-22 |
Phase velocity tomography of Rayleigh wave in Xinjiang from ambient noise |
| |
| TANG Xiao-Yong, FAN Wen-Yuan, FENG Yong-Ge, TANG You-Cai, CHEN Yongshun John, ZHU Li-Xia. Phase velocity tomography of Rayleigh wave in Xinjiang from ambient noise[J]. Chinese Journal of Geophysics (in Chinese), 2011, 54(8): 2042-2049, doi: 10.3969/j.issn.0001-5733.2011.08.011 |
| |
| Authors: | TANG Xiao-Yong FAN Wen-Yuan FENG Yong-Ge TANG You-Cai CHEN Yongshun John ZHU Li-Xia |
| |
| Affiliation: | 1. Institute of Theoretical and Applied Geophysics, School of Earth and Space Sciences, Peking University, Beijing 100871, China; 2. Earthquake Administration of Chongqing Municipality, Chongqing 401147, China |
| |
| Abstract: | Using continuous data from Peking University Yutian broadband seismic array and Xinjiang seismic monitoring network, we have obtained phase velocity maps of Rayleigh wave in Xinjiang area between periods 10~35 s from ambient noise. The results correlate well with the surface geological features, such as the Tien Shan, Tarim Basin and Junggar Basin are well depicted by the Rayleigh wave phase velocity anomalies. The phase velocity maps at 10~20 s show comparatively low velocity anomalies in Tarim Basin and Junggar Basin, corresponding to the thick sediments. From intermediate periods to long periods, 25~35 s, the phase velocity maps manifest clear differences in the Eastern and Western Tien Shan area. We obtained the crust and upper mantle Rayleigh phase velocity maps of Xinjiang area. By combining the traditional surface wave methods, this research would be a good foundation to reveal the 3D shear wave structure of this area. |
| |
| Keywords: | Xinjiang Rayleigh wave Ambient noise Tomography |
|
| 点击此处可从《地球物理学报》浏览原始摘要信息 |
|
点击此处可从《地球物理学报》下载免费的PDF全文 |
|
