| 华北地区热均衡、重力均衡与深部构造 |
| |
| 引用本文： | 陈石,王谦身,徐伟民,蒋长胜,卢红艳.华北地区热均衡、重力均衡与深部构造[J].地球物理学报,2011,54(11):2864-2875. |
| |
| 作者姓名： | 陈石 王谦身 徐伟民 蒋长胜 卢红艳 |
| |
| 作者单位： | 1. 中国地震局地球物理研究所,北京 100081;
2. 中国科学院地质与地球物理研究所,北京 100029 |
| |
| 基金项目： | 科技部地震行业科研专项重大项目"中国地震科学台震探测-南北地震带南段"(201008001),中国地震局地球物理研究所基本科研业务专项(DQJB09A02,DQJB08B04)联合资助. |
| |
| 摘 要： | 本文基于最新的全球重力场模型TopexV18.1数据,在区域背景尺度下,计算了华北地区的区域布格重力异常,并反演了Moho面分布特征;在此基础上结合区域地热流测量数据,讨论重力均衡和热均衡调整过程对现今地形的影响;最后,结合已有的速度结构模型和岩石圈热参数,对10个次级块体单元的热均衡特点开展了综合对比研究.研究结果表...
|
| 关 键 词： | 华北地区重力场 布格重力异常 Moho面结构 热均衡 重力均衡 |
| 收稿时间： | 2011-06-12 |
Thermal isostasy of North China and its gravity isostasy and deep structure |
| |
| CHEN Shi,WANG Qian-Shen,XU Wei-Min,JIANG Chang-Sheng,LU Hong-Yan.Thermal isostasy of North China and its gravity isostasy and deep structure[J].Chinese Journal of Geophysics,2011,54(11):2864-2875. |
| |
| Authors: | CHEN Shi WANG Qian-Shen XU Wei-Min JIANG Chang-Sheng LU Hong-Yan |
| |
| Institution: | 1. Institute of Geophysics, China Earthquake Administration, Beijing 100081, China;
2. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China |
| |
| Abstract: | In this paper, based on the up to date global free-air gravity anomaly dataset(TopexV18.1), we computed the Bouguer gravity anomaly of north China area and studied its Moho structure. Moreover, using the regional heat flow dataset, we discussed the gravity and thermal effect in the isostasy mechanism on the present topography. Finally, combined with existing velocity model and thermal parameters of lithosphere, we carried out thermal isostasy contrast studies for 10 secondary block units. The results are important for understanding the deep structure and regional isostasy pattern in north China. The results show that there are distinct differences both in the deep structures and thermal isostasy characteristics because of the various destruction of the bottom of north China craton. The recovery relationship of topography and heat flow after deducting the gravity effect from the average seismic wave velocity indicates that there is very remarkable effect for the present topography. But the effect is not obvious in the Yanshan uplifted zone and Jizhong depressions block. |
| |
| Keywords: | Gravity anomaly of North China Bouguer gravity anomaly Moho structure Thermal isostasy Gravity isostasy |
| 本文献已被 万方数据 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 |
|
