项目名称: 联合多源卫星和地面重力数据研究中国及邻区莫霍面深度
项目编号: No.41304009
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 天文学、地球科学
项目作者: 王伟
作者单位: 中国测绘科学研究院
项目金额: 25万元
中文摘要: 针对目前中国及邻区莫霍面深度模型分辨率和精度较低,影响莫霍面深度的敏感因素不确定,重力数据分离方法和反演约束方法存在不足等现状,本课题联合利用GOCE等多源卫星和地面重力数据,提出剥除法和小波多尺度方法联合分离重力数据,将均衡理论与界面反演有效联合,从纯重力学角度确定中国及邻区的莫霍面深度。研究内容包括:①构建多源卫星重力和地面重力数据有效综合应用的理论和算法;②挖掘多源重力数据的地球物理信息,研究其对异常量的不同敏感性;③联合均衡理论和界面反演方法确定中国及邻区莫霍面深度。本项目将通过多源卫星和地面重力数据的有效联合应用,挖掘重力数据中包含的地形、地壳等信息,反演获得中国及邻区完整的莫霍面深度模型,研究成果有助于加深对我国及邻区莫霍面的认识,提高全球莫霍面的高频信息,对探讨地区构造格局、资源与能源潜在前景、地震灾害等均将有着深远的意义。
中文关键词: 莫霍面深度;重力;反演;卫星重力;小波分析
英文摘要: For the status quo of the uncertainty on sensitive factors affecting the Moho depth, lower resolution and accuracy of Moho depth model in China and adjacent areas,and the shortage of separation methods of gravity data and inversion constraint methods, this project will use the GOCE with other satellites gravity and ground gravity data, and propose joint stripping method and wavelet multiscale method to separate gravity data, effectively joint isostaty theory and interface inversion method, to determine the integrity Moho depth of China and adjacent areas from the pure gravity angle. The research work includes: ①exploring effective comprehensive utilization of multisource satellites gravity data and ground data; ②mining variety of geophysical information in gravity data and studying the different sensitivity to the anomaly; ③inversing satellite and terrestrial gravity data to research Moho depth in China and surroundings. The project will build a joint application of the theory and algorithms for multisource satellites gravity and terrestrial gravity data, discovery terrain, crust and other information contained in the gravity data, and inverse Moho depth model in China and adjacent areas. The research will help in deepening the understanding of Moho in China and its adjacent areas, and improving global Moho high
英文关键词: Moho depth;gravity;inversion;satellite gravity;wavelet analysis