In the direct current IP instrument used at present, the terminal time of the power supply square wave of the primary electric field sampling contains the secondary electric field formed by induction. In the high polarizability geological body, the apparent resistivity reflected by the instrument will weaken its low resistivity or enlarge its high resistivity characteristics. In field work, therefore, proper dataprocessing should be conducted so as to reduce such influence.
赵聚林, 薛斌义, 冯军, 何海军. 直流激发极化法中的视电阻率参数及二次场采样[J]. 物探与化探, 2009, 33(1): 46-48.
ZHAO Ju-Lin, XUE Bin-Yi, FENG Jun, HE Hai-Jun. THE APPARENT RESISTIVITY PARAMETERS IN DIRECT CURRENT IP METHOD
AND THE SECONDARY ELECTRIC FIELD SAMPLING. Geophysical and Geochemical Exploration, 2009, 33(1): 46-48.