Tectono magmatic Environment of Cretaceous Volcanic rocks, in the north of Doroh (southeast of Sarbisheh) East of Iran.

Abstract The study area is located in the north of Doroh and northern part the Sistan suture zone. Volcanic rocks such as basalt, Basaltic andesite, trachyandesite and andesite  with Cretaceous age are interbeded with  sedimentary rocks. Main textures in these rocks are porphyric, glomeroporphyric, intergranular, vesicular and amygdaloidal. Plagioclase and pyroxene are main minerals in basalt and basaltic andesite and main phenocrysts in andesite and trachyandesite are plagioclase and hornblende with minor of alkali feldspar. Geochemically, these rocks have calc alkaline and tholeiitic nature and show enrichment of LREE, LILE and depletion of Ti,Nb and P that support their relation to subduction zone. Enrichment  in U, Cs, K, Sr, Zr, Th can be result of crustal contamination. This magmatism can support  subduction of Sistan oceanic lithosphere in east of Iran.