%0 Journal Article %T Geochemistry and petrogenesis of basaltic flows in the Nain-Dehshir ophiolites %J Iranian Journal of Crystallography and Mineralogy %V 16 %N 4 %U http://ijcm.ir/article-1-611-en.html %R %D 2009 %K Basalts, Diabases, Flat REE pattern, HFSE depletion, Back-arc basin., %X Diabases, pillow lavas and basaltic flows in the Nain-Dehshir ophiolites are marked with flat to slightly depleted pattern in REE chondrite-normalized diagram and are characterized by depletion in HFSE and enrichment in LILE. This geochemical behavior can be considered for lavas erupted in arc-related environments. Clinopyroxene in these rocks shows low content of TiO2 and resemble those found in island-arc tholeiites. These characteristics are consistent with back-arc formation during middle to upper Cretaceous, due to the oblique subduction of Neotethyan Ocean along the active continental margin of the central Iranian block. %> http://ijcm.ir/article-1-611-en.pdf %P 602-611 %& 602 %! %9 Research %L A-10-134-283 %+ %G eng %@ 1726-3689 %[ 2009