The granite-greenstone belt in the Archean craton of Tanzania is one of the well-known gold accumulation zones,and porphyry-type gold deposits are a significant part of it,showing substantial exploration potential.This study investigates the geological characteristics,geochemical features,ore-controlling factors,metallogenic fluids,sources of metallogenic materials,and genesis of typical porphyry-type gold deposits in the region.It is concluded that the mineral-bearing porphyry belongs to the calc-alkaline series,formed in an island arc environment,primarily by magmatic-hydrothermal processes.The ore bodies are distributed within the porphyry and at the contact zones with the greenstone belt,mainly in potassium-silica alteration zones and silica-sericite-sulfide belts.Isotopic characteristics indicate that the metallogenic materials originated from deep magma,and the metallogenic fluid is magmatic water.A metallogenic model for the Archean craton’s porphyry-type gold deposits is summarized,suggesting that deep faults between the Archean craton’s porphyry bodies and the greenstone belt,as well as the marginal contact zones of the porphyry bodies,should be the main targets for future exploration.