Jurassic magmatism related Pb-Zn-W-Mo polymetallic mineralization in the central Nanling Range, South China: Geochronologic, geochemical, and isotopic evidence from the Huangshaping deposit

Geochronology, Petrology, and Genesis of Two Granitic Plutons of the Xianghualing Ore Field in South Hunan Province: Constraints from Zircon U–Pb Dating, Geochemistry, and Lu–Hf Isotopic Compositions

“…The Shi-Hang zone, well-known as the collision suture between the Yangtze Block and Cathaysia Block in the Neoproterozoic, is also an important granitic magmatic belt and polymetallic metallogenic belt [1][2][3]. As a significant part of the Shi-Hang zone, the W-Sn-Pb-Zn mineralization in this South Hunan possesses an obvious zoning feature from east to west: Shizhuyuan and Yaogangxian W deposits in the eastern part, Furong, Xianghualing and Furong Sn deposits in the middle part, and Huangshaping and Baoshan Pb-Zn plutons related with these large deposits have been drawn the attention of geologists, and abundant geochronological and geochemical data have been reported recently, such as Qitianling pluton (155.5 ± 1.3 Ma, associated with the Furong Sn deposit [13]), Qianlishan pluton (157 ± 2 Ma, associated with the Shizhuyuan W deposit [15]), Yaogangxian pluton (156.9 ± 0.7 Ma, associated with the Yaogangxian W deposit [11]), Huangshaping pluton (154.3 ± 1.9 Ma, associated with the Huangshaping Pb-Zn deposit [16]), and Baoshan pluton (158 ± 2 Ma, associated with the Baoshan Cu-Mo-Pb-Zn deposit [6]). These coeval granitic plutons in South Hunan, related to different metallic mineralization, have been an ideal place to probe into the magmatism and related mineralization of South China.…”

Genesis of the Huangshaping W–Mo–Cu–Pb–Zn deposit, South China: Role of magmatic water, metasomatized fluids, and basinal brines during intra‐continental extension

“…The extremely high 87 Sr/ 86 Sr ratios for the granite porphyry might indicate the strong impact of mineralizing fluids. In contrast, the initial 87 Sr/ 86 Sr ratios of the mineralized quartz porphyry are only slightly higher than those of its unaltered counterpart (initial 87 Sr/ 86 Sr ratios = 0.7028–0.7100; Ding, Ma, Lu, Zhang, Zhang, & Gao, ; Hu et al, ), indicating weak fluid metasomatism. The initial 87 Sr/ 86 Sr ratios of the altered granophyre are almost identical to the unaltered granophyre (initial 87 Sr/ 86 Sr ratios = 0.7131–0.7176; Ding, Ma, Lu, Zhang, Zhang, & Gao, ), suggesting no fluid contribution from this granitoid.…”

“…The spatial relationship of these rock bodies has been recognized based on the field investigation (Figure b,c). The dacite porphyry (zircon U–Pb age = ~158 Ma; Hu et al, ; Yuan, Yuan, Chen, & Huo, ), which is found in the southern and eastern portions of the mine, mainly occurs as dike intrusions along fault F 0 . These dikes trend E–W and occur as steep and irregular vertical bodies, isolated from other intrusions.…”

“…In addition to magmatic fluids related to Jurassic intrusions, formation‐derived fluids have also been advocated for the genesis of the deposit, especially for the Pb–Zn ores (Ding, Ma, Lu, & Zhang, , ; Ding, Ma, Lu, Zhang, & Zhang, ; Yuan, Yuan, Liu, et al, ). Previous studies mainly focused on the Sr–Nd isotopic compositions of unaltered granitoids (Ding, Ma, Lu, Zhang, & Zhang, ; Ding, Ma, Lu, Zhang, Zhang, & Gao, ; Hu et al, ) and fluid inclusions in gangue minerals (Huang et al, ; Li et al, ), leaving the altered and mineralized granitoids and metallic minerals relatively less studied. However, recent work indicates that the mineralization‐related porphyries in the Huangshaping area are A‐type granites formed during intra‐continental extension (Li, Watanabe, & Yonezu, ; Quan et al, ).…”

“…The deposit has traditionally been viewed as a typical skarn type, with a complete hydrothermal ore system that evolved from high temperature (with W-Mo-Sn-Bi-[Fe] deposition) to medium temperature (with Cu deposition) and finally, low temperature (with Pb-Zn-[Ag] deposition; Ai, 2013;Huang, et al, 2013;Yao et al, 2007). This single ore-forming system was regarded to be generically associated with granitic porphyries, which have been dated at 160-150 Ma and represent multiple intrusive events in the Huangshaping area (Ding, Ma, Lu, Zhang, Zhang, & Gao, 2016;Hu et al, 2017;Li, Watanabe, & Yonezu, 2014a;Quan et al, 2012;Yuan, Yuan, Chen, & Huo, 2014). However, this interpretation has been challenged by recent field investigations and geochemical studies that reclassified the Pb-Zn-(Ag) mineralization as being of sedimentary origin, with no direct relationship to Jurassic magmatism (Xi, Dai, & Liu, 2009;Zhu, Wang, Wang, Cheng, & Fu, 2012).…”