Geochemical Modeling of Heavy Metals Pollution, Emphasizing on Cu-Pb by Using Remote Sensing in South of Kashan

Structurally, south of Kashan is a part of Orumieh-dokhtar zone. Late stage fluids of the Oligo-Miocene granodiorite have been influenced Eocene volcanic rocks, that caused argillic, sericitic, propyllitic, calc-silicate, iron oxides and silisification alteration zones. Based on the cluster analysis of samples, the elements can be divided into two groups of Cu-Co-Cd and Pb-Zn-As. Distribution of the metals in the two groups has a good adaptation with argillic and calc-silicate alteration zones respectively. According to ICP-MS analysis, minimum and maximum of Cu, Pb, Cd, Zn, As and Co is (1.5-459), (1-623), (>2.97), (14-413), 0.5-21) and (1.5-17) ppm correspondingly. On the basis of the soil standard, there is some Cu & Pb contamination. Combined multiplicative calculation show good correlation with both argillic as well as clac-silicate alterations and Cu & Pb pollution. Kriging estimation has been documented maximum Cu & Pb anomalies occurred in the southern part of area, on igneous rocks. Field relationship, remote sensing data and geostatic calculations strongly support; granodiorite body has been generated Cu & Pb pollution. Otherwise fluids caused hydrothermal alteration, which enriched those elements.