1980 Volume 30 Issue 164 Pages 345-362
The Hida metamorphic belt is divided into three tectonic units, called western, central and eastern massif, respectively. The indications of lead-zinc mineralization ever reported are distributed exclusively in the central massif.
The skarn type lead-zinc mineralization is thought to have been closely related to the Inishi-type migmatite as is evidenced from their close mutual association. It is notable that the distribution of the Inishitype migmatite is also restricted within the central massif, in which the migmatite is found predominantly alongside the "metabasite" which is thought to be highly digestive migmatitic diorite and gabbro complex.
The central massif of the Hida metamorphic belt extends NNW and SSE with approximate width of 25 km and is quite unique against the other units of the Hida metamorphic belt, viewing from metamorphic grade, geological structure and species of migmatite, in addition to the fact that it shows a remarkable negative anomaly of the residual gravity.
