The tungsten mineralization, located at the junction of Wuning, Xiushui and Jing’an counties in northern Jiangxi Province, south China, is a superlarge tungsten deposit discovered recently. It is closely associated with the middle Mesozoic W- bearing granitic magmatism. This study found that the Nb- Ta- bearing granitic porphyry occurs in this area. The diagenetic and metallogenic characteristics of Ni- and Ta- bearing granite porphyry and porphyritic granite were compared using geochemical features, mineral structure, major and trace elements compositions, and U- Pb istopic chronology of zircon and Nb- and Fe- minerals to understand the relationship between the genesis of ore- forming granite and its relation to mineralization. The results show that ① the zircon and columbite U- Pb isotopic age of the Nb- Ta- bearing granitic porphyry is 146±2 Ma and 144±5 Ma, respectively, closed to the age of the formation and W- mineralization of the Wbearing porphyritic granite. ② The Nb- Ta- bearing granitic porphyry has low Nb/Ta of 1.7 and Zr/Hf of 13, in which the micas (Li- muscovite) contain the Li2O and F content up to 2.1 and 3.8% respectively and the K2O/Rb2O ratio as low as 24. The W- bearing porphyritic granite has high Nb/Ta of 4.8 and Zr/Hf of 30 and muscovite contains Li2O of 0.32% and F of 1.5% and K2O/Rb2O of 88, respectively, indicating that Wbearing porphyritic granite has a higher degree of evolution than the porphyritic granite. ③ The indicator minerals of the Nb- Ta- bearing granitic porphyry include magmatic oxide minerals (columbitegroup minerals, wolframoixiolite, wodginite, Nb- Ta bearing wolframite and Nb- Ta bearing rutile) and rare- metalbearing Li- muscovite forming during the later magmatism enriched in fluids. The W- bearing porphyritic granite is mainly represented by wolframite, scheelite and secondary rutile formed during hydrothermal stage. It can be concluded that the parent magma of Nb- Ta- bearing granitic porphyry is rich in Nb, Ta and W, and high volatile components and abundant magmatic fluids benefit for Nb- Ta- W mineralization, while W mineralization occurred later than the magmatic stage of the W- bearing porphyritic granite and is related to the hydrothermal fluids. Further, the study has confirmed the multistaged mineralization occurring in the Dahutang deposit.