Geophysical Prospecting at the Kamioka Mine

Abstract

Results of geophysical prospectings for the pyrometasomatic zinc-lead deposits in the vicinity of the Kamioka mine since 1954, are summarized in this paper. Also details of the resistivity and magnet surveys in the Nakagoya area in 1963 are given.
Using both resistivtiy and magnet methods, skarn and graphite-rich limestone can be distinguished from gneiss and limestone including a great quantity of lenticular quartz mass, but it is very difficult to make distinction between ore skarn and barren one.
For developement of a more effective method, the writers are now testing the applicability of the I.P. method for the Kamioka-type deposits, getting considerably hopeful results.