The Zhuxi deposit, with 3.44 million tons (Mt) WO₃ at 0.54%, is a world-class reduced scheelite skarn deposit and is spatially associated with highly fractionated and highly mineralized dikes, i.e., scheelite-bearing anorthite rock and albitite dikes. These scheelite-bearing dikes share similar rare earth element (REE) and Sr–Nd isotope compositions but display major element compositions distinct from those of the causative biotite monzogranite pluton associated with the Zhuxi deposit. The average compositions of apatite grains from anorthite rock, albitite, and the granitic pluton display roughly subparallel chondrite-normalized REE patterns. Additionally, subparallel chondrite-normalized REE patterns are displayed between the edges of scheelite grains from altered fine-grained granite and the cores of scheelite grains from albitite as well as between the edges of scheelite grains from albitite and scheelite grains from anorthite rock. Moreover, the in situ titanite (150.04 ± 0.39 Ma) and apatite (150.8 ± 1.7 Ma) U–Pb ages of the anorthite rock and the apatite U–Pb age (152.2 ± 2.6 Ma) of the albitite are consistent with the rock- and ore-forming ages (∼150 Ma) of the Zhuxi deposit. Furthermore, the water- and alkali-rich intergranular melt, which was extracted from the magma system, predated its solidification entirely and formed widespread intergranular albite rims surrounding plagioclase grains in the biotite monzogranite pluton where myrmekite is widespread.

The scheelite-bearing anorthite rock and albitite dikes represent the products of highly fractionated melts that were saturated with volatiles and extracted from deep granitic magma reservoirs, which later crystallized to form the granitic pluton. Because W is highly incompatible and enriched in residual granitic magmas, large-tonnage W mineralization occurred above deep-seated causative granitic intrusions during the extraction of residual granitic melts if the parental magma exhibited metallogenic potential. Extensive W mineralization is directly associated with highly fractionated dikes rather than with granitic plutons, and these dikes could indicate pathways for W-bearing fluids.

The exploration potential for reduced scheelite skarn deposits in deeply emplaced intrusions should not be confined to areas where granites are exposed at the surface but should include areas where granitic intrusions are possibly present at depth, particularly in regions with widespread, highly fractionated, highly mineralized discrete felsic dikes. If the causative granitic intrusions are exposed at the surface, most W orebodies and their spatially associated dikes could have been completely eroded. This is the reason for the disappearance of economic W orebodies adjacent to highly fractionated granitic plutons that share similar geochemical characteristics with granitic dikes surrounded by economic W orebodies. Thus, caution should be applied when assessing the W metallogenic potential of highly fractionated granitic rocks primarily according to their geochemical characteristics.

竹溪矿床，344万吨（Mt）WO ₃0.54%，是世界级的还原型白钨矽卡岩矿床，在空间上与高度分馏和高度矿化的岩脉相关，即含白钨的钙长石岩和钠长石岩脉。这些含白钨矿的岩脉具有相似的稀土元素 (REE) 和 Sr-Nd 同位素组成，但其主要元素组成不同于与竹溪矿床相关的成因黑云母二长花岗岩岩体。钙长石、钠长石和花岗岩岩体中磷灰石晶粒的平均成分显示出大致亚平行球粒陨石归一化 REE 模式。此外，亚平行球粒陨石归一化 REE 模式显示在蚀变细粒花岗岩的白钨矿晶粒边缘与钠长石的白钨矿晶粒核心之间，以及钠长石的白钨矿晶粒与钙长石岩石的白钨矿晶粒边缘之间。此外，钙长石岩石的原位榍石（150.04±0.39 Ma）和磷灰石（150.8±1.7 Ma）U-Pb年龄和钠长石的磷灰石U-Pb年龄（152.2±2.6 Ma）与岩石-竹溪矿床的成矿年龄（～150 Ma）。此外，从岩浆系统中提取的富含水和碱的粒间熔体完全早于其凝固，并在黑云母二长花岗岩中的斜长石颗粒周围形成了广泛的粒间钠长石边缘，该岩浆广泛存在。

含白钨矿的钙长石岩和钠长石岩脉代表了高度分馏熔体的产物，这些熔体被挥发物饱和并从深层花岗岩岩浆储层中提取出来，后来结晶形成花岗岩岩体。由于W高度不相容且富含残余花岗岩浆，如果母岩浆具有成矿潜力，则在残余花岗岩熔体提取过程中，在深部成因花岗岩侵入体上方发生大吨位W矿化。广泛的 W 矿化与高度分馏的岩脉直接相关，而不是与花岗岩岩体相关，这些岩脉可能表明含 W 流体的通道。

在深部侵入体中减少白钨矽卡岩矿床的勘探潜力不应局限于地表出露花岗岩的区域，而应包括在深处可能存在花岗岩侵入体的区域，特别是在分布广泛、高度分馏、高度矿化的离散区域长英质堤坝。如果成因的花岗岩侵入体暴露在地表，大多数矿体及其空间相关的岩脉可能已被完全侵蚀。这就是与高度分异的花岗岩岩体相邻的经济矿体消失的原因，这些岩体与被经济矿体包围的花岗岩岩脉具有相似的地球化学特征。因此，