Writers : Monazzami Bagherzadeh, R.; Karimpour, M. H.; Rahmani, H.
Refference : The Forth National Geological Conference of Payam Noor University(PNU)
Publishing Year : 1389

Abstract :

The study area is located in the middle part of Taknar structural zone in north of central Iran smallcontinent. The plutonic complex is seen as ring- shaped and reverse zoning. The major composition of this complex is granitoid composition consist of granite, granodiorite to tonalite. Gabbro, diorite and quartz diorite are another rocks of this complex. The complex in central part specially have attacked by a doleritic dyke series with index doleritic intersertal and microdioritic and also aplitic texture . With due attention to locate of granitoid rocks’ area in subsulvos granits series and also because present of H2O-bearing minerals for example biotite and amphibole in the complex rocks must say that created magmatism of rocks this complex have been saturation of water vapour. Magmatic series of the complex rocks is calc-alkalin.Chemical characteristics and tectonic environment of the complex granitoids is completely similar together. From view of alumin saturation index, samples locate in the meta- to peralumin class.
In addition to specifications petrogeraphy, on the view of geochemical parameters compeletly comparable to the case study granitoids to I- type granite. The comparison major and trace elements of this rocks define orogeny tectonic environment. Tectonic setting of debated rocks on the base of trace elements diagrams is conformable with volcanic arc granites (VAG). Fluid inclusion study results indicate that frequency of three phase fluids (LVHa) is more than another types, and most of this fluids are salt saturation so that the range of salinity percent is variable from 30.95 – 43.37, on the basis of NaCl weight percent. Dissolution temperature of this fluids show 245-280oc and also at some case is >300oc. At the most of study fluids (LVHa), the size of salt minerals is bigger than vapour bubble.

Subject List : Geochemistry