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Jiangxi Province (South China) is one of the world&#8217;s top tungsten (W) mineral provinces. In this paper, we present a new LA-ICP-MS zircon U-Pb age and Hf isotope data on the W ore-related Xianglushan granite in northern Jiangxi Province. The magmatic zircon grains (with high Th/U values) yielded an early Cretaceous weighted mean U-Pb age of 125 &#177; 1 Ma (<i>MSWD</i> = 2.5, 2&#963;). Zircon &#949;Hf(t) values of the Xianglushan granite are higher (&#8722;6.9 to &#8722;4.1, avg. &#8722;5.4 &#177; 0.7) than those of the W ore-related Xihuanshan granite in southern Jiangxi Province (&#8722;14.9 to &#8722;11.2, avg. &#8722;12.5 &#177; 0.9), implying different sources between the W ore-forming magmas in the northern and southern Jiangxi Province. Compiling published zircon geochemical data, the oxygen fugacity (<i>f</i>O₂) of the late Yanshanian granitic magmas in Jiangxi Province (the Xianglushan, Ehu, Dahutang, and Xihuashan plutons) were calculated by different interpolation methods. As opposed to the W ore-barren Ehu granitic magma, the low <i>f</i>O₂ of the Xianglushan granitic magma may have caused W enrichment and mineralization, whilst high <i>f</i>O₂ may have led to the coexistence of Cu and W mineralization in the Dahutang pluton. Additionally, our study suggests that the absence of late Mesozoic Cu-Mo mineralization in the Zhejiang, Jiangxi, and Anhui Provinces (Zhe-Gan-Wan region) was probably related to low <i>f</i>O₂ magmatism in the Cretaceous.