THE APPLICATION OF NEW GRAVITY SURVEY TECHNIQUES IN SEARCH FOR ANCIENT BURIED HILLS
XU Xiao-fang1, HE Guo-quan2, ZHANG Sheng1, JIA Hui-jun3
1. East Geophysical Company, Zhuozhou 072751, China;
2. Design and Research Institute of Water Conservancy and Hydropower of Hebei Province, Tianjin 300350, China;
3. Xuanhua Architectural Investigation and Designing Co. Ltd of Zhangjiakou, Xuanhua 075000, China
With a certain depression of Bohai bay basin as an example, this paper deals with the application effect of such new techniques as the second-vertical derivative after downward continuation to a given depth, the 3D apparent density inversion, and the joint modeling and inversion with gravity, magnetic and seismic data in LCT platform. The anomaly of second-vertical derivative after downward continuation to a certain depth can reflect small-scale, low amplitude and deep-seated buried hills more effectively and intuitively compared with the conventional second-vertical derivative anomaly. The 3D apparent density inversion section can reflect the density variation of the geological body both vertically and horizontally and provide evidence for buried hill research. The application of LCT joint inversion with gravity, magnetic and seismic data can quantitatively determine the depth and amplitude of buried hills.
徐晓芳, 何国全, 张生, 贾会军. 重力勘探新技术在寻找古潜山中的应用[J]. 物探与化探, 2006, 30(5): 397-400.
XU Xiao-fang, HE Guo-quan, ZHANG Sheng, JIA Hui-jun. THE APPLICATION OF NEW GRAVITY SURVEY TECHNIQUES IN SEARCH FOR ANCIENT BURIED HILLS. Geophysical and Geochemical Exploration, 2006, 30(5): 397-400.
