Petrography, geochemistry and petrogenesis of Qale Gabra granitoid Rocks (south-west of Jiroft- Kerman province)

The Qale Gabra plutonic rocks has upper Jurassic age and intruded to the lower Jurassic Sedimentary rocks. Based on Field geology, mineralogy and geochemistary studies, the lithology composition of the area consists of granodiorite, monzogranite, syenogranite, granite rich in quartz and diorite-gabbro. geochemical diagrams, shows a mix acting of magmatic differentiation ,assimilation, mixing and contamination phenomena . According to genetical classification it belongs to I type and Magnetite series. Tectonic setting discrimination diagrams shows relation of this mass with VAG and based on other geochemical data it has a Metaaluminus-Peraluminus and Calc Alkaline with low postassium affinity. LREE and LILE enrichment and Nb , Ti depletion may be has been occurred for a crustal contamination in a subduction zone. As it located on Urmia-Dokhtar magmatic belt is seems that, This area is a product of subduction of Neothetys under central Iranian continental crust. Keyword: Qale Gabra,Granitoid , Geochemistry, mixing,fractional crystalization,contamination, Continental Subduction zone , Jiroft, Kerman province.