日本ゼオライト学会　刊行物 Publication of Japan Zeolite Association

The genetic condition of a zeolite is often suggested by paragenetic minerals whose genetic conditions are known. In zeolitic rocks, the paragenesis is almost constant in each zeolite zone of a genetic type. However, it is different among those of three different genetic types, burial diagenesis, submarine hydrothermal, and diagenesis in alkali-saline lates. It means that zeolites were formed under different temperature conditions being suggested by species of clay and silica minerals. The forming temperature condition of a well-crystalline zeolite can be estimated from that of paragenetic zeolites whose genetic conditions are known from bore-hole data.

The mineralogical change in zeolite rocks has been well studied. It seems to have occurred successively as consistent with change of environmental conditions.

On the other hand, well-crystalline zeolite is often associated with many kinds of other zeolites and non-zeolite minerals. The order of mineral crystallization in a well crystalline zeolite-bearing vein suggests that the physicochemical condition may have significantly changed in a fairly short time.