Outline of Base mapping in the Kishu Mine

Abstract

The ore deposits of Kishu Mine consist of several veins running pararell with each other at intervals of some two or three hundred meters. These veins do not penetrate so deep that range of working areas become inevitably wider. Accordlngly, in order to obtain possible deposits it is naturally important to draw and study the topographical and underground maps.
The works of exploration corps are aimed at two directions, i. e. topographical surface measurement and underground survey. In the case of the former, we draw both 1/5000 and 1/2000 topographical measurement sheet, and 1/10000 photographic birds eye views has also become available for our purposes. In the case of the latter, we draw five kind of survey sheets presently. But to rationalize the exploration works, we intend to reduce these to two kinds in the near future, 1/2000 and 1/500 measurement sheets. Original sheets of our survey results are of sheet system.