On the Use of the Geoid Anomalies for Geophysical Interpretation over the Area of Hunan Province
详细信息
- 责任者：Lin Miao (Department of Survey Engineering and Geomatics ; Central South University ; Changsha 410083 ; China) ; Zhu Jianjun
- 刊名：Chinese Journal of Geophysics
- 出版年：2012
- 卷期：55(2)
- 关键词：大地水准面 ; geoid ; 湖南 ; Hunan Province
- 页码：p.472-483
- 图表：6 illus., 39 refs.
- 分类号：2100
- issnNo：ISSN0001-5733
- isbnNo：CN11-2074/P
摘要
In this paper, the authors investigated the applications of geoid anomalies in geophysical interpretation. The ultra-high geopotential model EGM2008 is used to compute the gravimetric geoid, and the corresponding Bouguer and isostatic geoids are obtained from complete topographic and Airy-Heiskanen local isostatic corrections with a synthetic method combining the prism and tesseroid approaches. Then the geoids are divided into several residuals which represent anomalous features in different depths, by removing different wavelength components. Finally, a case study over the Hunan area based on these data sets and other geophysical data is presented. The results show that the residual gravimetric geoids can reveal some anomalous structures in deep earth effectively,such as the distributions of deep rifts, the locations of tectonic blocks and the lateral density distribution in the upper mantle etc..