Abstarct: The lower Jurassic (≈180 Ma) Gowd-e-Howz (Siah-Kuh) granitoid stock, a part of the Mesozoic andean-type Sannandaj-Sirjan mextamorphic-magmtic zone (SSMMZ), is intruded into the Upper Paleozoic-Triassi mextamorphic rocks, southeastern Kerman, southeast of Iran. This granitoid stock consists mainly of coarsed to medium grained granodiorite, with subordinate gabbro, diorite, quartz diorite, quartz monzonite, granite and aplitic-pegmatitic alkali granitic veins and cut by quartz monzonitic dykes. The main minerals of the rocks include olivine (chrysolite), clinopyroxene (diopside-augite-salite), orthopyroxene (magnesium to intermediate pigeonite), amphiboles (magnesium hornblende, tschermakitic hornblende, ferro tschermakite, ferro hornblende to post magmatic/secondary tremolite-actinolite), biotite (primary mg-biotite) and feldspars (orthoclase and albite to anorthite solid solution series). The minor and secondary minerals include apatite, zircon, opaque, titanite, serpentine, tremolite-actinolite, epidote, sericite, calcite and clays. Enclaves of various types and sizes (dioritic or mafic microgranular/microgranitoid, cognate and amphibolitic/xenolithic, normally in several centimeters) also occur in the stock. The granitoid rocks represent low to medium-K calc-alkaline nature, enrichment in large ionic lithophile elements (LILEs) such as Rb, Ba, K, Ce and depletion in high field strength elements (HFSEs) such as Ti, Y, Nb and Zr. The REE patterns have relatively parallel smooth LREE enriched chondrite normalized trends indicating the role of fractional crystallization in magma evolution. Type of lithologic association (gabbro, diorite, granodiorite, granite), common igneous mafic microgranitoid enclaves (MMEs), and plots of the geochemical data on various whole rock and mineral chemistry discriminant diagrams indicate that the Gowd-e-Howz granitoid stock has characteristics of mextaluminous to slightly peraluminous, calc-alkaline, magnetite series, I-type granitoids of continental volcanic arc settings which is formed in an active continental margin subduction zone. In this model, intiation of NE-dipping subduction of the Zagros Neotethys oceanic lithospher beneath the Central Iran continental lithospher in the Late Triassic-Early Jurassic could have accounted for generation of granitic magma in the Andean type arc magmatism of the Sanandaj-Sirjan mextamorphic-magmatic zone, where granitoid plutons including the Gowd-e-Howz granitoid stock were formed. Fallowing the subduction, dehydration of subducted oceanic slab was producing fluids invading and melting of subducting oceanic slab and its over mextasomatised mantle wedge caused partial melts which migrated and underplated in the baxse of the continental crust and melted the amphibolitic lower continental crust. This process resulted in the formation of an enriched mafic-intermediate arc magma, at variable water fugacity and led to the formation of the Gowd-e-Howz granitoid rocks in the Early Jurassic time (180 ± 1.5 Ma and 178.8 ± 1.2 Ma). Thermobarometric calculations indicate magma storaging, plumbing and fractionating has been occurred in three levels include high pressures in 40-50, 14-16 and 5-7 km in the baxse, middle and upper crust respectively. Low-pressure crystal fractionation gave rise to generation of hydrous more felsic magmas, represented in part by granodiorite-granite and alkali feldspar granite segregates (aplite-pegmatite veins).