| 福州-泉州-汕头地区地壳结构的爆炸地震研究 |
| |
| 引用本文： | 廖其林,王振明,王屏路,余兆康,吴宁远,刘宝诚.福州-泉州-汕头地区地壳结构的爆炸地震研究[J].地球物理学报,1988,31(3):270-280. |
| |
| 作者姓名： | 廖其林 王振明 王屏路 余兆康 吴宁远 刘宝诚 |
| |
| 作者单位： | 1. 福建省地震局 福州;
2. 国家地震局 北京;
3. 北京大学地球物理系 北京 |
| |
| 摘 要： | 本文根据1982和1985年在福州-泉州-汕头地区的人工爆炸地震测深资料,分析了震相特征,共识别到九个波组:P1、Pg、Pg′、P3°、P4（P4°）、P5°、Pn（Pn°）、P7*及S波组。通过对波的走时反演、正演拟合、理论地震图和射线追踪方法反复计算,得到了该区地壳与上地幔结构模型。结果表明,该区具有大陆地壳向海洋地壳过渡的边缘地区结构特征。地壳P波速度6.30km/s,莫霍面速度7.90km/s,地壳厚度30km,由三层构成,厚度分别为3km、15km和12km。在中地壳存在一层速度为5.50-5.90km/s、厚度为3.0-4.0km的低速层,低速层分布与温泉出露有密切的关系。在下地壳下部有一数公里厚的高速致密的壳-幔混合物层,其形成原因是由于上地幔物质上涌并迁移到下地壳的结果。此外,还讨论了莫霍面结构,界面起伏和断裂展布概况。
|
| 关 键 词： | 福州&mdash 泉州&mdash 汕头剖面 地震测深 地壳结构 中地壳低速层 断裂 |
| 收稿时间： | 1986-09-23 |
EXPLOSION SEISMIC STUDY OF THE CRUSTAL STRUCTURE IN FUZHOU-QUANZHOU-SHANTOU REGION |
| |
| LIAO QI-LIN WANG ZHEN-MING WANG PING-LU YU ZHAO-KANG.EXPLOSION SEISMIC STUDY OF THE CRUSTAL STRUCTURE IN FUZHOU-QUANZHOU-SHANTOU REGION[J].Chinese Journal of Geophysics,1988,31(3):270-280. |
| |
| Authors: | LIAO QI-LIN WANG ZHEN-MING WANG PING-LU YU ZHAO-KANG |
| |
| Institution: | 1. Seismological Bureau of Fujian Province, Fuzhou;
2. State Seismological Bureau, Beijing;
3. epartnent of Geophysics, Peking University, Beijing |
| |
| Abstract: | Based on the analysis of the D. S. S. data obtained from Fuzhou-Quanzhou-Shantou region in 1982 and 1985, nine wave groups have been identified as P1, Pg, P'g, Pg°, P4（Pg°）, Pg°, Pn（Pg°）, Pg* and S. The models of the crustal and upper mantle structure in the region have been obtained with direct invesion and calculations of the travel time and synthetic seismogram and ray traceing.The result shows that in the region, the crustal structure is of the characteristic of the transitional zone of the continental margin. The P-wave velocity and thickness of the crust, which is composed of three layers of 3 km, 15 km and 12 km, thicknesses are respectively 6.3 km/s and 30.0 km. Pn velocity is 7.90 km/s. In the mid-crust there is a low velocity layer which is 3.0-4.0 km thick and with velocity 5.50-5.90 km/s. It is found that there is a close relationship between the distribution of the low velocity layer and the hot spring. In the lower part of the lower, crust, there is a high velocity and dense layer several kilometers thick. It is a mixture of crust and mantle materials which resulted from the upwelling and transporting of the upper mantle material.The structure and fluctuation of Moho as well as the distribution of the faults are also discussed in the paper. |
| |
| Keywords: | Fuzhou-Quanzhou-Shantou profile Seismic sounding Crustal structure Low velocity layer in mid-crust Faults |
| 本文献已被 CNKI 等数据库收录！ |
| 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 |
|
