阿仁鉱山稲荷坑鉱床の探鉱について
1972 年 22 巻 112 号 p. 129-138
詳細
1972 年 22 巻 112 号 p. 129-138
On the basis of the studies of the geologic structure and the mode of mineralization, an intensive exploration work, accompanied with an application of the induced polarization method, was carried out since 1969 at the Inari adit area of the Ani Mine located in Akita Prefecture.
The main criteria drawn for the prospecting work can be summerized as follows :
1) As the past studies have revealed, basaltic rocks may play an important and favourable role for ore deposition and may sometimes control formation of bonanzas of veins which correspond to the extension of sheets and dykes of the basaltic rocks.
2) Anomalies of frequency effects of induced polarization will serve as indices to locate the area of mineralization and hydrothermal alteration.
3) Judging from the distribution of the resistivity values, trachyandesite will take the shape of a funnel at depth.
4) It is presumed that concentric fissures caused by intrusion of trachyandesite will exist around the center of the trachyandesite body.
As a result of exploratory adit works, some new blind copper viens were found at depth in the area covered by seemingly non-mineralized lava flows of trachyandesite and dacite.
