1982 Volume 32 Issue 172 Pages 85-94
Concepts on hypogene mineral zoning, mineral association, mineral paragenesis, and mineralization stage relating to macrostructures of vein filling in ore veins are briefly discussed.
As an example of plutonic ore vein, macrostructures of vein filling of plutonic tungsten-tin-copper vein at the Otani mine, Kyoto Prefecture, Japan, one of representatives of plutonic tungsten-tin veins related genetically to granitoid of Late Cretaceous in the Inner zone of Southwest Japan, are examined. Based on macrostructures of vein filling on the order of ore body, three major mineralization stages, called stage I, stage II, and stage III from earliest to latest, are distinguished by major tectonic breaks. Sequence of mineralization, characteristic features of each mineralization stage, and variations of filling temperature and salinity ranges of fluid inclusions in minerals from stage I to stage III are summarized.
