Investigation of Effect of Geological Formation Units on Heavy Metal Distribution in Sediments of Sardabrood Watershed

Geological formation in Sardabrood river basin are carbonate sedimentary (with ageof cretaceous and Permian)، shamshak formation، basic and acidic and metamorphicrocks in upstream of the basin. To study effect of lithologic and geologic units on heavymetals concentration in sediments، 33 samples from surface water were analysed byICP_MS method in Amdel Company in Australia. This analysis was done using clusteranalysis technique after preparing. The results show that based on type of upstreamrocks، 4 different rock clusters were determined. In addition to geologic units، allsamples shown some organic matter due to rural area in upstream. The results indicatemax. Distribution rate of Mn and Cr is from shamshak formation، Pb originates fromcarbonate formation and Sn is due to magmatic rocks.