黒鉱鉱床の物理探鉱

抄録

As practically all the black are deposits in shallow places have already been discovered, explorations are conducted for those occurring in deeper places in recent years. The exploration of are reserves in deeper places is conducted in three different stages namely an areal survey ofgeological structure aimed at clarifying basin structure and grasping igneous movement, precise surveyof geological structure to find out places of occurrence of are deposits and prospecting of are deposits themselves with an object to find out the special characteristics of the property of matter.
The geophysical exploration methods adopted for the survey of geological structure are such as gravity survey, seismic and ground magnetic survey, while in the case of prospecting of ore deposits, electromagnetic method (Turam method) is used for reconnaisance prospecting whereas induced polarization method is used for precise prospecting. The explanation on each of these are given hereunder using two or three examples in each case.