| 中国东部海域地壳-上地幔瑞利波速度结构研究 |
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| 引用本文： | 郑月军,黄忠贤,刘福田,李红谊.中国东部海域地壳-上地幔瑞利波速度结构研究[J].地球物理学报,2000,43(4):480-486. |
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| 作者姓名： | 郑月军 黄忠贤 刘福田 李红谊 |
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| 作者单位： | 1. 中国地震局地壳应力研究所,北京100085;
2. 中国科学院地质与地球物理研究所,北京100101 |
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| 基金项目： | 国家高科技发展项目!（8200104），中国地震局九五重点项目!（95010111－9）． |
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| 摘 要： | 为了进一步了解中国东部沿海及相邻海域的地壳－上地幔结构特征，对该区域的构造演化历史、地震活动及深部构造等方面研究提供一些基础资料，利用３１个数字地震台记录的高质量瑞利波资料，采用一种新的混合路径频散的网格反演方法（Ｏｃｃａｍ方法），对中国东部海域瑞利波群速度横向不均匀分布进行了初步研究．根据反演得到的１０-１５０ｓ共３６个中心周期的群速度分布特征，以及几个典型地点的剪切波速度结构的深度变化，对研究区域内各构造单元的划分以及它们在速度结构和上地幔低速层埋深等方面的特征进行了讨论。
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| 关 键 词： | 瑞利波群速度 频散 网格反演 中国东部海域 地壳-上地幔速度结构 |
| 收稿时间： | 1999-04-09 |
RAYLEIGH WAVE VELOCITY AND STRUCTURE OF THE CRUST AND UPPER MANTLE BENEATH THE SEAS IN EASTERN CHINA |
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| ZHENG YUE-YUN,HUANG ZHONG-XIAN,LIU FU-TIAN,LI HONG-YI.RAYLEIGH WAVE VELOCITY AND STRUCTURE OF THE CRUST AND UPPER MANTLE BENEATH THE SEAS IN EASTERN CHINA[J].Chinese Journal of Geophysics,2000,43(4):480-486. |
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| Authors: | ZHENG YUE-YUN HUANG ZHONG-XIAN LIU FU-TIAN LI HONG-YI |
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| Institution: | 1. Institute of Crustal Dynamics, China Seismological Bureau, Beijing 100085, China;
2. Institute of Geology and Geophysics, Chinese Academy of Science, Beijing 100101, China |
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| Abstract: | The velocity structure of the crust and upper mantle beneath the seas in eastern China are revealed in this paper by studying the surface wave dispersion. High quality Rayleigh wave data from thirty-one stations are used in this paper. A new grid inversion method (Occam's inversion method) is adopted to calculate the pure path dispersion curves in this area. The group velocity maps of Rayleigh waves are obtained for thirty-six periods from 10 to 150 seconds, and the shear wave velocity structure are constructed for a few locations typical for some tectonic units. The division of different tectonic units and the characteristics of both velocity structure and the depth of low-velocity layer in the upper mantle of different tectonic units in the study area are studied. |
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| Keywords: | Rayeigh waves group velocity Dispersion Grid inversion Seas in eastern China Velocity structure of the crust and upper mantle |
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