Abstract
The chemical composition of kuroko ore-kuroko ore-forming solution is estimated on the basis of silicate-solution equilibrium and electroneutrality relation in the solution. Characteristic features of the model ore-forming solutions by the present author are compared with those of the other possible ore-froming solutions such as the model ore-forming solutions by the other workers, hydrothermal solution accompanied by the present-day base metal deposition, fluid inclusions, and hydrothermal solution derived from basalt/seawater reaction experiments. In general, alkali, and alkali earth elements concentrations of the model oreforming solution are similar to those of the other possible ore-forming solutions, if Clconcentration and temperature are same. However, in general, heavy metal elements concentrations of the model ore-forming solution are different from those of the other possible ore-froming solutions. It is notable that alkali, alkali earth, and heavy metal elements concentrations of some fluid inclusions are nearly same to those of the model ore-forming solution.
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