Boreskov

PP‐2FLUID INCLUSION IN QUARTZ FROM THE ALIGUDARZ GRANITOIDS, NW IRANSiyamak BagheriyanIslamic Azad University, Tiran Branch, Tiran, Isfahan, 85318, I.R. IranFax No.: +98‐332‐3229402, E‐mail: Siyamak.Bagheriyan@gmail.comAbstract: The Aligudarz granitoid Plutons have intruded into meta‐ sediments in thesanandaj – sirjan zone, north west of Aligudarz city (west Iran). Based on petrography andgeochemistry, the Aligudarz granitoid have been classified into granite, granodiorite,pegmatite S–Type with the mineral assemblage of quartz, plagioclase, K – Feldspar, Biotiteand moscovite. The intrusion has thermally metamorphosed the country rocks up To Albite –epidote hornfels fasies. Fluid inclusion study on quartz vein in Aligudarz granitoid sow FourType of Fluid inclusions, 1‐ low salinity aqueous inclusion 2‐high salinity inclusion 3‐ CO 2 –H 2 O inclusion 4‐ carbonic inclusions. The density data of Fluids in Aligudarz granitoidsindicates entrapment temperature of 580 To 636 °C at pressures of 3.9 to 5.1 bars. This datanearly coincides with the mineral P–T estimates. There are Partial melting processes duringthe formation of S–Type Aligudarz granitoids.Keywords: Fluid inclusion, Aligudarz granitoids, salinity, S‐TypeFigure 1: Fluid inclusion in Quartz vein in Aligurarz Granitoid (high salinity inclusions)133