Structurai analysis of dykes in east of Borujerd

Granitoied pluton of Borujerd and metamorphic rocks are cut by many acidic and basic dykes in the east and northeast of Borujerd city. Acidic dykes trends are different and intruded in different times . Acidic dykes involved aplitic and pegmatite dykes and show two main trends, NE-SW  and NW-SE and intruded in quartz diorite, granite- granodiorite and hornfelsic rocks. Basic dykes are the youngest activity of magma in this area and only intruded in NE-SW trend in granite - granodiorite rocks . Many of aplitic and pegmatite dykes are deformed and show folding. According to evidence and trends of these dykes, they intruded poly stages in this area. Deformation caused  mylonitic fabric in granitoied body and many of aplitic dykes. Deformation evidence show that acidic dykes formed in progressive deformation regime. Basic dykes formed in extension fractures that caused by pressure resulting continental collision of  Arabian and Iranian microplats normal to the collision zone.