عنوان مقاله [English]
نویسندگان [English]چکیده [English]
The Mulid River catchment is located in the southeastern of Qayen city, South Khorasan province. In this study, geochemical characteristics of Mulid river sediments are provided in order to investigate climatic conditions and sediments contamination rate. The use of discriminant, bivariate and ternary diagrams suggests the mafic igneous provenance and the oceanic arc islands tectonic setting of for these sediments. The mentioned data suggest mafic igneous provenance for these sediments. The calculation of some indices such as CIA, PIA and ICV is shown that these sediments are related to first depositional cycle and suffered low weathering. Investigation of the contamination rate of the studied river sediments by heavy metals indices shows that the source of sediment pollution is natural factors and the environmental risk of these pollutants is very low.