|
|||||
|
|
| HQ-E爆破地震测深剖面的地壳浅部精细结构及其地质构造研究 | |
| 引用本文： | 王有学,余钦范,韩国华.HQ-E爆破地震测深剖面的地壳浅部精细结构及其地质构造研究[J].物探与化探,2002,26(2):91-96. |
| 作者姓名： | 王有学 余钦范 韩国华 |
| 作者单位： | 1. 中国地质大学,北京,100083;陕西地质勘查局第二综合物探大队,陕西,西安,710016 2. 中国地质大学,北京,100083 3. 陕西地质勘查局第二综合物探大队,陕西,西安,710016 |
| 摘 要： | HQE爆破地震测线的地壳浅部的精细结构研究结果表明,上地壳的速度结构由疏松盖层、沉积层、加里东褶皱构造层及元古宙结晶基底等4个构造层构成,且大致以武夷山为界,宁都以西的低速凹陷区与中新生代沉积盆地相对应,加里东褶皱基底底部剧烈起伏,其最大埋深可达10km;而在宁都以东地区,地表速度明显增大,且加里东褶皱基底底界的深度明显变浅,仅为3～5km。笔者根据地壳浅部速度精细结构的变化特征对剖面沿线的构造单元进行了划分,并对邵阳盆地、衡阳盆地、茶陵盆地及泰(和)兴(国)盆地等盆地的分布范围、性质、基底及其主要地层分布进行了初步的分析和探讨。 |
| 关 键 词： | 爆破地震测深 地壳浅部速度精细结构 区域地质构造 盆地分析 |
| 文章编号： | 1000-8918(2002)02-0091-06 |
| 收稿时间： | 2001-08-03 |
THE FINE VELOCITY STRUCTURE IN THE SHALLOW CRUST ALONG THE HQ-E SEISMIC PROFILE IN SOUTHEASTERN CHINA |
|
| WANG You-xue ,YU Qin-fan ,HAN Guo-hua.THE FINE VELOCITY STRUCTURE IN THE SHALLOW CRUST ALONG THE HQ-E SEISMIC PROFILE IN SOUTHEASTERN CHINA[J].Geophysical and Geochemical Exploration,2002,26(2):91-96. | |
| Authors: | WANG You-xue YU Qin-fan HAN Guo-hua |
| Institution: | WANG You-xue 1,2YU Qin-fan 1,HAN Guo-hua 2 |
| Abstract: | This paper discusses the fine velocity structure in the shallow crust on the basis of the wide-angle seismic data collected along the HQ-Eprofile. The velocity structure depicts the characteristics of formation and development of the South China fold belt. The shallow crust is composed evidently of four strata: sedimentary cover, sediments, Caledonian fold basement and Proterozoic crystalline basement. The velocity structure shows obvious differences laterally along the profile. To the northwest of Wuyi Mountain (near Ningdu), the low velocity depression is correlated to the Mesozoic and Cenozoic basins, with strong relief up to a maximum depth of 10 km at the bottom of the Variscan fold basement. As for the velocity structure to the southeast of Ningdu, the velocity near the surface becomes much higher, and the bottom of the Caledonian fold basement gets thinner, merely 3～5 km in depth. At the end of this paper, the author makes a tentative analysis of several basins according to the fine velocity structure in the shallow crust. |
| Keywords: | Wide-angle seismic experiment fine velocity structure in shallow crust tectonics basin analysis |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |
| 点击此处可从《物探与化探》浏览原始摘要信息 | |
| 点击此处可从《物探与化探》下载免费的PDF全文 | |