The Shakanai mine is located at abont 2km east of the Hanaoka mine in the Green Tuff region of the northeastern part of Honshu. Prospecting of the mine has been performed since April 1961, and five Kuroko ore bodies have been found. Date of discovery and dimensions of the ore bodies are as follows:
It is very interesting that the Kuroko ore deposits of the Shakanai the Hanaoka, the Dowa-Matsumine, the Mitsubishi-Matsuki, the Kosaka-Motoyama and the Kosaka-Uchinotai mines occur in the marginal zone of the Hokuroku basin.
