Indian Journal of Geo Marine Sciences Vol. 48 (02), February 2019, pp. 193-204 Environmental pollution and pattern formation of Harsin–Sahneh ophiolitic complex (NE Kermanshah—west of Iran) Ali Moradpour1*, Reza Zarei Sahamieh2, Ahmad Ahmadi Khalaji2, & Ramin Sarikhani2 1 Soil Conservation and Watershed Management Research Department, Kermanshah Agricultural and Natural Resources Research and Education Center, AREEO, Kermanshah, Iran 2Department of Geology, Faculty of Sciences, Lorestan University, Khoramabad, Iran *[E-mail:
[email protected]] Received: 25 January 2016; revised 28 November 2016 To determine and estimate the environmental impact of certain elements- 10 soil samples from various areas in these massifs have been investigated. The obtained results show that most of heavy and major elements were exceeding the permissible levels in soil samples in the study area. On the subject of soil quality, concentrations of elements Cr, Mn, Fe, Ca, Mg, Ca, Ni, and Zn are above permissible levels. Comparing the concentrations of elements with results of grain size analysis illustrates that the concentrations of Cr, Ni, Fe, Mg, and Co are positively correlated with sand fraction and the concentrations of Al, P, Mn, and Pb are directly proportional with clay fraction in soil samples. Petrographic evidence indicates that this ophiolitic sequence consists of both mantle and crustal suites. In this complex, generally lithologies include harzburgitic and lherzolitic peridotites, isotropic and mylonitic gabbros, dyke complex, basaltic pillow lavas, and small out crop of plagiogranite. The mineral chemistry of Harsin mafic rocks is island arc setting for this part of complex and geochemistry of mafic and ultramafic rocks of Sahneh region displaying P-type mid-ocean ridge basalt (MORB) nature.