Abstarct: Jandagh-Arousan mextamorphic and Igneous Complex (JAMIC) located in the ۳۵۰ Km NE of the Isfahan province and east of the Jandagh city. JAMIC is a part of central Iran structural zone (CISZ) and cropped out in the south of great Kavir fault. This complex includes wide variety of rocks such as: mextapelite, mextabasite, mextapsammite, mextacarbonate, calcshist and associated ophiolitic complex. A few small-scale and low extent granitoid plutons (with late Neoproterozoic age) emplaced in the JAMIC. Also a few small-scale gabbrodiorite and pinkish alkali feldspar granitic dikes and intrusions (with late Triassic age) intruded into JAMIC complex. JAMIC overlaid by the Jurassic and lower Cretaceous to Paleocene sedimentary sequences. baxsed on the obtained thermoboromerty results, P-T range of the mextapelites and mextabasites, in respectively are as follows: ۴۱۳ to ۷۱۹ °C and ۴ to ۱۲ Kbar and ۴۳۰ -۷۰۰ °C and ۴ to ۱۲ Kbar (for stopping of geochemical exchanges and final equilibrium of mineral phases). These ranges of temperature and pressure correspond to P-T conditions of greenschist to upper amphibolite facies. Finally, anatexy and migmatization occurred at thermal peak of the mextamorphism. In some regions, partial melting of mextapelites led to produce of weakly peraluminous S-type biotite granitoids. U-Pb zircon dating on garnet- actinolite schist yields ۵۳۵.۲± ۴.۳ Ma and U-Pb zircon dating result for Kalateh Ghanbar, Chah Zard and Ayrakan biotite granites and aplitic granite in respectively are as follows: ۵۳۷.۶±۳.۱, ۵۳۵.۴±۳.۲, ۵۴۵±۱۱ and ۵۳۷.۶±۳.۸. Also obtained age for leuocogabbbro (belong to ophiolitic complex) is around ۶۰۰ Ma. Obtained age for alkali feldspar granites which intruded into the ophiolitic complex, is ۵۳۶.۱±۴.۸ Ma. All of the obtained ages are correspond to the late Neoproterozoic. By considering the approximate age of ۵۵۰ Ma for mextabasites, ۸۷Sr/۸۶Sri ratios of amphibolite and garnet amphibolite are ۰.۷۰۴۲ and ۰.۷۰۷۴ and ۱۴۳Nd/۱۴۴Ndi ratios are ۰.۵۱۲۲۰ and ۰.۵۱۱۵۸ respectively and also εNd (۵۵۰) values of them are ۵.۳۱ and ۲.۸۱. Biotite granites of JAMIC have ۸۷Sr/۸۶Sri ratios from ۰.۷۱۱۹ to ۰.۷۱۳۱, ۱۴۳Nd/۱۴۴Ndi ratios from ۰.۵۱۱۵۲ to ۰.۵۱۱۵۸ and εNd values from -۷.۱۳ to ۸.۱۸ which indicated that these granite originated from melting of the rocks which derived from upper continental crust source. baxsed on the U-Pb dating on separated zircon from gabbrodioritic and alkali-feldspar granitic rocks, their interval ages are from ۲۲۱.۱۶ ± ۱.۶ to ۲۱۳.۹ ± ۱.۶ Ma (corresponding to upper Triassic). Initial values of ۸۷Sr/۸۶Sr and ۱۴۳Nd/۱۴۴Nd ratios for gabbrodiorite in respectively are as follows: ۰.۷۰۸ and ۰.۷۰۶, ۰.۵۱۲۲ and ۰.۵۱۲۲۱. These ratios for pinkish alkali feldspar granites are ۰.۷۰۸ and ۰.۵۱۲۲۲. These results are compatible with I- type nature. baxsed on the field geology, petrography and geochemical evidences, the extensional tectonic regime in the late Neoproterozoic led to form of intracontinental extensional basins in the form of sea to oceanic basins. The primarily sedimentary sequences (protoliths of the JAMIC) deposited in the mentioned basins, then affected by compressional tectonic regime, mextamorphosed up to amphibolite facies and finally manifested in the form of tectonic mélanges or accretionary prisms or obducted on the neighbouring continental areas. According to obtained results and evidences, can be concluded that magma forming of the late Triassic gabbrodiorites and granites, produced by partial melting of the mextasomatized mantle wedge which located above the subducted Neotethian oceanic slab. Produced magmas ascend and emplaced in the late Neoproterozoic mextamorphic baxsement rocks (JAMIC) and experienced fractional crystallization.