Cross section of Kupferschiefer in Lubin Mining District in Poland. Note the progression of Pt-group metal zone to Cu-Ag, to Pb-Zn mineral zonation from the Rote Faule. The Pt-group metals are found typically closest to the Rote Faule. The Pt-metals are the least soluble and thus migrate in Cl brines the least distance from the Rote Faule.