Igneous rocks emplacement NE Gazvin is the main objective of this project. The analysis of emplace-ment mechanism is done using paleostress direct inversion method. More than 209 shear planes, bear-ing slickenside lineation are measured at 12 different localities. Processing of corrected data and re-cognition of paleostress state, a paleostress trajec-tory map established. Sill mechanism is the best form of igneous emplacement in this area. This is reflected by geometrical shape of paleostress trajectory lines. The emplacement mechanism also is supported by petrological evidences.