پترولوژي ماگماتيسم دو هنجاري (Bimodal) در دياپيرهاي سازند دزو در منطقه حرجند (شمال-شمال شرق كرمان)

The Petrology of Bimodal Magmatism in Diapires of Desu Formation in Horjand Area(N-NE of Kerman)

The petrology of bimodal magmatism of Desu series in Horjand area, a rather disorded diapir like compelexes of Desu sedimentary-igneous series (Early Cambrian) can befound. In the field studies, it was found that the igneous rocks of the series are mostly basic and felsic lavas which are accompanied by small intrusive bodies. In this area, bimodal magmatism happened. These igneous rocks are in two basic and acidic families and have no intermediate components. The basic rocks are mostly basalts with some microgabbro and monzo-gabbro which are in fact intrusive category of basalt. Acidic rocks are mostly trachytes and trachylatites with some microsyenites. The additive natural trend of major, minor and trace elements phases in melt shows not only the genetical relationship between these two categories but also a compositional gap between them. The geochemical-petrological discrimination diagrams show a transitionally-alkaline or transalkali parent magma for the complex.