Abstarct: One of the geophysical methods for mextal ores exploration (e.g. Copper) is electromagnetic (EM) techniques. These methods are sensitive to the variation of electrical property of subsurface materials; hence, these are enabling to detection of zones with indicator electrical conductivity. The aims of this study is collecting, modeling and interpreting of EM data for copper exploration by using the VLF and EM34-3 equipment in Mayamay city which is located in Semnan province. To achieve this purpose, the EM data was measured on 3 profiles (P01, P02 and P07) with E-W direction and one controlling profile (P06) with N-S direction was done. . EM34-3 data collection with using two different transmitters and receiver arrays which is called vertical dipole (VDM) and horizontal dipole (HDM) polarization modes was done. The results of data inversion modeling in EM34-3 equipment, VLF data and inverse model 3D show of sections, illustrated there is three trends of possible porphyry copper mineralization in roughly North-South in basaltic host rocks. The results illustration, 3 possible anomaly zones are in P01 profile in 0 to 20, 60 to120 and 140 to 170 meters from the profile source and also 3 possible anomaly zone in P02 profile at 0 to 10, 20 to 60 and 60 to 80 meters have been seen. Also P07 profile has 2 possible anomaly zones at 5 to 70 and 80 to 110 meters from the source profile. Throughout the P06 profile, the anomaly zones with low conductivity at the depth of approximately 10 meters of their origin are available. In the end, to have a better interpretation, the results of 2D inversion of EM data were compared with IP and RES data along two profiles which obtained in previously collection. This comparison of results indicates that the resolution of IP and RES methods is higher for depth more than 40 meters.