ماگماتيسم در منطقه بردسكن (استان خوزستان)

Magmatism in Bardescan area (Khorasan province)

The researched area is limited by the 57° 26ʹ To 57° 53ʹ lon­gitude and by the 35° 18ʹ to 35° 30ʹ latitude. It is in the north of Doruneh fault and west of Taknar fault. This region is set­tled in central Iran zone (Stokliin & Rottner, 1968). West part of Taknar fault has located in Sabzvar stractural zone, in studied region, dominant deformational trend is West - East and it is following to Alpine deformational trend studing and sampling in this region focused on 4 doposits: Dahaneh siah, Zangalu , Cheshmeh gaz and Chesmeh zelzeleh. Lithology of this area is variated from Basaltic andesite to Andesitic basalt in pyroclastic and lava shape. On the basis of 30 XRF analyses and moving these datas on magmatic series and techtonomagmatic diagrams, we can say that, magmatism is west of Taknar fault is alkaline type with hav­ing a shoshonitic tendency and it is connected with post vol­canic arcs.Zeolite is one of the minor constituents of the sandy layers in the Akchaghyl formation in Moghan area. Heulandite, a mineral of this group, is seen as white grains in the sedi­ments . XRD studies of volcanic glasses , which are found throughout the Akchagyl