Abstract: The invention covers the mining industry. Detection method of the occurrence zone of the mantle substance diapir finger consisting in that that geological observation are carried out in riftzones banked up by diapirs of the abnormal mantle and places of location of the mantle substance finger in the earth's crust are determined. Based on the presence of influence traces of silanes streams upon the rock and/or presence of separate ridges having the length up to 200 km by the width of up to 20 km and/or based on the blast traces of silanes and/or presence of scoria cones, differing by that that the correspondence of 3He/4He from gases sampled from sources of 10?5 order is additionally determined for determination of silicides at the small depth as physical parameters for the location of the mantle substance diapir finger in the earth's crust. The presence of high semiconductor conductivity, locality and activity of magnetic anomalies and anomalies of gravity field is additionally established.