Abstract
Palaeozoic eugeosynclinal belt of the South-West Japan is divided into several geological units. These units are also distinguished by quantities of Mn and Cu-deposits, moreover, by contents of Fe and Mn in Mn-ores. These specialization in existence of ore deposits may be expression of sedimentation rate in the geosyncline. Namely, Cu-deposits are formed in the higher rate, Mn-deposits in the lower rate and Mn-Cu-deposits in the intermediate rate of sedimentation respectively.
