Spatial variation law of vertical derivative zero points for potential field data

作     者：王万银 张功成 梁建设 Wang Wan-Yin;Zhang Gong-Cheng;Liang Jian-She

作者机构：长安大学重磁方法技术研究所 长安大学地质工程与测绘学院 长安大学西部矿产资源与地质工程教育部重点实验室西安710054 中海石油研究中心北京100027 

出 版 物：《Applied Geophysics》 (应用地球物理（英文版）)

年 卷 期：2010年第7卷第3期

页      面：197-209,292页

核心收录：

学科分类：081801[工学-矿产普查与勘探] 081802[工学-地球探测与信息技术] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：jointly supported by the National Major Science and Technology Program (No. 2008ZX05025) the National 973 Program (Grant No. 2009CB219400) 

主　　题：vertical derivative zero point spatial variation law edge location 

摘      要：In this paper we deduce the analytic solutions of the first- and second-order vertical derivative zero points for gravity anomalies in simple regular models with single, double, and multiple edges and analyze their spatial variation. For another simple regular models where it is difficult to obtain the analytic expression of the zero point, we try to use the profile zero points to analyze the spatial variation. The test results show that the spatial variation laws of both first- and second-order vertical derivative zero points are almost the same but the second-order derivative zero point position is closer to the top surface edge of the geological bodies than the first-order vertical derivative and has a relatively high resolution. Moreover, with an increase in buried depth, for a single boundary model, the vertical derivative zero point location tends to move from the top surface edge to the outside of the buried body but finally converges to a fixed value. For a double boundary model, the vertical derivative zero point location tends to migrate from the top surface edge to the outside of the buried body. For multiple boundary models, the vertical derivative zero point location converges from the top surface edge to the outside of the buried body where some zero points coincide and finally vanish. Finally, the effectiveness and reliability of the proposed method is verified using real field data.