Deciphering deep-seated, highly fractionated, and reduced granitic magma systems associated with world-class scheelite skarn ores: A case study of the Zhuxi deposit, South China
Deciphering deep-seated, highly fractionated, and reduced granitic magma systems associated with world-class scheelite skarn ores: A case study of the Zhuxi deposit, South China
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破译与世界级白钨矿矽卡岩矿石相关的深层、高度分异、还原的花岗岩岩浆系统：以华南竹溪矿床为例
DOI：
10.1016/j.oregeorev.2022.105084
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发表时间：
2022-10
影响因子：
3.3
通讯作者：
Yongpeng Ouyang
中科院分区：
文献类型：
--
作者：
Shiwei Song;Jingwen Mao;Guiqing Xie;Qiangwei Su;Wei Jian;Yongpeng Ouyang
朱溪矿床含白钨矿脉与成因黑云母二长花岗岩岩体共卵状（~ 150 Ma）形成。朱溪矿床含白钨矿脉是深晶花岗质岩浆储层中提取的高分馏熔体的产物。•高分馏、高矿化的单体岩脉应作为评价深部还原花岗质岩浆系统钨成矿潜力的重要标准。朱溪矿床为世界级的还原白钨矿矽卡岩矿床，wo3含量为344万吨（Mt），含量为0.54%，在空间上与含白钨矿的钙长岩和钠长岩等高分异、高矿化岩脉相关。这些含白钨矿脉具有相似的稀土元素（REE）和Sr-Nd同位素组成，但主要元素组成不同于与朱溪矿床有关的成因黑云母二长花岗岩岩体。钙长岩、钠长岩和花岗质岩体中磷灰石颗粒的平均组成大致呈亚平行球粒陨石归一化稀土模式。此外，蚀变细粒花岗岩白钨矿粒边缘与钠长石白钨矿粒芯之间，以及钠长石白钨矿粒边缘与钙长石白钨矿粒边缘之间的稀土元素呈亚平行球粒归一化模式。此外，钙长岩的原位钛矿（150.04±0.39 Ma）和磷灰石（150.8±1.7 Ma） U-Pb年龄以及钠长岩的磷灰石U-Pb年龄（152.2±2.6 Ma）与朱溪矿床的岩石和成矿年龄（~ 150 Ma）一致。此外，岩浆系统中提取的富水、富碱的粒间熔体完全早于其凝固，并在黑云母二长花岗岩体中广泛分布的斜长石颗粒周围形成了广泛的粒间钠长石边缘。含白钨矿的钙长岩和钠长岩岩脉代表了从深部花岗质岩浆储层中提取的浸透挥发物的高分馏熔体的产物，这些熔体后来结晶形成花岗质岩体。由于W在残余花岗质岩浆中高度不相容且富集，如果母岩浆具有成矿潜力，则在残余花岗质熔体提取过程中，会在深部成因侵入体上方发生大吨位的W成矿。广泛的W矿化与高分馏岩脉直接相关，而与花岗质岩体无关，这些岩脉可能指示含W流体的路径。
The scheelite-bearing dikes in the Zhuxi deposit formed coevally (∼l50 Ma) with the causative biotite monzogranite pluton. • The scheelite-bearing dikes in the Zhuxi deposit represent the products of highly fractionated melts extracted from deep crystallizing granitic magma reservoirs. • Highly fractionated and highly mineralized individual dikes should serve as an important criterion for assessing the W metallogenic potential of deep-seated reduced granitic magma systems. The Zhuxi deposit, with 3.44 million tons (Mt) WO 3 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.
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影响因子：
0.9
作者：
Rémy S. Poulin;Andrew M. McDonald;D. Kontak;M. McClenaghan
通讯作者：
Rémy S. Poulin;Andrew M. McDonald;D. Kontak;M. McClenaghan
DOI：
10.1016/c2009-0-12435-2
发表时间：
1987
期刊：
--
影响因子：
--
作者：
T. A. Kwak
通讯作者：
T. A. Kwak
世界级朱溪钨铜矽卡岩矿床成矿相关花岗岩中磷灰石的年代学及结构和成分复杂性：岩浆系统中岩浆演化和钨富集的记录
影响因子：
3.3
作者：
Wei Zhang;Shao-Yong Jiang;Ouyang Yongpeng;Di Zhang
通讯作者：
Di Zhang
影响因子：
3.9
作者：
B. Frost;K. Chamberlain;John C. Schumacher
通讯作者：
B. Frost;K. Chamberlain;John C. Schumacher
影响因子：
3.5
作者：
M. Barboni;F. Bussy
通讯作者：
M. Barboni;F. Bussy