ACTIVE GROWTH OF A SUBMARINE SLAG DISPOSAL ORE DEPOSIT IN THE NORTHERN EUBOEKOS GULF, GREECE

Sea-bottom sediment samples recovered from a slag disposal site of a F e-Ni alloy smelting plant in the northern Euboekos Bay, Greece, were a nalysed for Fe, Cr, Ni, Mn, Zn, Co, Cu, Pb and organic carbon. A compa rison between affected and not-affected by the slag sites gives the fo llowing enrichment factors: 22 for Fe, 70-100 for Cr, 7-10 for Ni, 7 f or Co and about 4 for Mn and Zn. This latest set of data when compared with data obtained in the same area and with the same methodology 8 y ears ago, display an enrichment of values of the order of 2-7 for Cr a nd of the order of 1.5-2.5 for Fe, Ni, Mn, Zn, Cu, Co. However, on the northern part of the deposit, concentration values are dramatically e nhanced by a factor of 40 for Cr, 20 for Fe and up to 8 for Ni, Mn and Co.