Abstract
The hematite deposits of the Akatani mine are of hydrothermal-metasomatic origin, connected genetically with soda-rhyorite of mid-Miocene in age. And the ore deposits are characterized by marked hydrothermal alteration of wallrocks, especially the presence of alteration products of skarn minerals is an outstanding feature.
Hypogene kaolin minerals (dickite and kaolinite) also occur in the ore deposits and their environs, associated with hematite, hydrous ferric oxide and siderite. Among the kaolin minerals, kaolinite was examined by means of microscopic observation, X-ray diffractometry, thermal study and electron microscopy.
The results clarified the kaolinite to be a well-crystallized one. The main purpose of this paper is to present some mineralogical data of the kaolinite and to discuss the meaning of its occurrence in relation to ore genesis.
