1965 Volume 15 Issue 70-71 Pages 109-113
In the Taro mine, there are several types of deposits producing lead-zinc sulphide ore, pyritic ore, ccupriferous pyritic ore and so on. The deposits are concordant with the bedrock.
The ore-bearing formation, consisting of sandstone and slate, lies between quartz porphyrite of the upper part and graywacke of the lower part.
After the mineralization, the deposits suffered a slight thrust movement and intrusion of granitic rocks and diabasic rocks.
These deposits show no distinctly mineralized potentiality, but the abnormal distribution of graywacke and quartz porphyrite suggests the center of igneous activity in the sedimentary basin.
As a guide of prospecting, it has been decided that for drifting and drilling sedimentary rock area should be searched. Other important things are lineation, controlled ore shape pattern and so on, but these are useful only for already-explored ore bodies.
We have prospected the drift for a distance of 200m from the Ogiri main adit; we intend to continue the drifting for 150m or more.