Terrain Effect of Complicated Angle-Damain and Topographic Correction for a Point Electric Source
详细信息
- 责任者：Tang Jingtian (Key Laboratory of Metallogemic Prediction of Nonferrous Metals ; Ministry of Education ; School of Geosciences and Info-Physics ; Central South University ; Changsha 410083 ; China) ; Xin Huicui
- 刊名：Journal of Jilin University
- 出版年：2012
- 卷期：42(1)
- 关键词：电法勘探 ; electrical exploration
- 页码：p.254-261
- 图表：10 illus., 20 refs.
- 分类号：1600
- issnNo：ISSN1671-5888
- isbnNo：CN22-1343/P
摘要
Angle-domain is the basic unit to describe rugged terrain.Apparent resistivity anomaly of complicated terrain can be drawn using the method of angle domain overlapping and then the topographic correction can be performed.We superpose the distorted apparent resistivity of the simple angle-domain terrain to get the distorted apparent resistivity of complicated angle-domain terrain.The method analyses the error of combination and superposition.It’s also compared with the result of ANSYS modeling.It’s proved that the apparent resistivity anomaly of complicated angle-domain terrain can be gained by combination and superposition when the terrain does not vary greatly.And finally we show some examples in which the topographic effect is obtained by the method of angle domain overlapping,and the topographic correction is conducted in terms of the terrain correction formulation.The comparison with the result of horizontal terrain shows that the comparison method can weaken the topographic influence,and extrude the anomaly of the local geological body.