Abstract
The Komori mine is located in Kyoto prefecture in the western part of Japan. In the ore minerals, of the Komori mine, the minerals belonging to Cu-Fe-S system show interesting ex-solution textures under the reflection microscope. The ores having ex-solution textures are divided into two types, that is, the ores with lamellar texture and those with non-lamellar texture. The ores having lamellar texture are further divided into the following five subtypes as shown in the table in p. 340
subtype 1 has the lamellar texture of chalcopyrite-cubanite.
subtype 2 has chalcopyrite-cubanite lamellar texture ; in the cubanite lamellar the unmixed pyrrhotite is contained in crystallographic intergrowth.
subtype 3 has chalcopyrite-cubanite lamella rtexture; in the cubanite the lamellar unmixed pyrrhotite is contained in regular intergrowth, and the pyrrhotite has the unmixed cobalt-bearing pentlandite which further contains unmixed nickel-bearing mackinawite in crystallographic intergrowth.
subtype 4 has chalcopyrite-cubanite, lamellar texture ; in the cubanite lamellar the unmixed cobaltbearing pentlandite is contained in regular intergrowth.
subtype 5 has chalcopyrite-cubanite lamellar texture ; in the chalcopyrite lamellar the unmixed nickel-bearing mackinawite is contained in crystallographic intergrowth.
The ore having non-lamellar texture consists of granular cubanite and chalcopyrite, the former contains generally cobalt-bearing pentlandite in crystallographic intergrowth, while the latter contains nickel-bearing mackinawite in regular intergrowth.
These ex-solution textures are interpreted probably by Borchert's concept that presumed chalcopyrite-chalcopyrrhotite solid solutions, and by the presumption of chalcopyrite-cubanite solid solution.
