Some New Facts Found at the Lower Levels of the Shimokawa Deposit
1972 Volume 22 Issue 112 Pages 150-165
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1972 Volume 22 Issue 112 Pages 150-165
The recent exploration which was carried out at the lower levels of the Shimokawa mine has provided some favorable geological information which appears to warrant further prospecting.
Although the diabases occurring in this mine consist of various facies as observed by nacked eyes, it is noted that they are tholeiitic in chemical composition.
Amphibolization in diabase and sericitization in slate are characteristically predominant in this mining area.
The ore bodies are believed to occur along the boundary between crushed-diabase and phyllite. On the other hand, the distribution of minor elements in wall rocks and ore bodies indicates interesting features.
The relationships among altered rocks, mineral assemblages and ore bodies are as. follows:
