Geochemistry and tectonic setting of plutonic rocks in Zarchuiyeh valley (SE of Bardsir، Kerman)

In the southeast of Uromieh-Dokhtar volcanic belt، southeast of Bardsir (Kerman province)، there are numerous gabbroic، dioritic and tonalitic intrusive bodies crosscutting the basaltic، andesitic lava flows and the pyroclastics of the Eocene age. The widespread distribution of intrusive rocks in the studied area، mineralogical similarity between these plutons and the volcanics as well as very similar chemical compositions of these two groups of rocks in different geochemical and tectonomagmatic discrimination diagrams suggest that the plutonic and the volcanic rocks may have been originated from the same origin. Geochemical characteristics indicate that the ntrusives are calcalkaline and LREE-enrichment as compared with HREE، high contents of LILE relative to HFSE and the significant anomalies of Nb، Ti and P reveal that they belong to a subduction-related magmatism. All these evidences show that in the studied area parental agmas of both plutonic and volcanic rocks، have been originated from partial melting of a metasomatized mantle wedge. The mantle probably enriched in incompatible elements by the slab derived fluids.