Geochemistry and Pb isotopic proof for sources of heavy metal(loid)s in Late Cretaceous sandstones from Eastern Pontides (NE Turkey)

Upper Cretaceous sedimentary rocks are widely exposed around Trabzon, Giresun and Gümüşhane in the eastern Pontides. The mainly composed of sandstones marls, thicknesses these range from 170 to 400 m. This paper focused on Late regions identify concentrations, sources, deposition environment conditions certain heavy metal(loid)s (Zn, Pb, Cu, Ni, As, Co, Mo V). Enrichment factor (EF), geo-accumulation index (Igeo), Pollution (Pi), load (Pln), Pb isotope multivariate statistical analysis were performed elucidate pollution levels sources. In general, evaluation indices exhibited that moderately polluted by As Trabzon area, strongly Ni Co V areas. results analyses indicated partly might be originated anthropogenic whereas other metals derived geogenic origin. Lead isotopic demonstrated two characterized signatures sources sandstones, one related origin coal, gasoline pesticides. deposited transition—marine under oxic—weak oxic paleoclimatic ranged arid moist during period.