Geochemistry and U–Pb geochronology of the Wagone and Hermyingyi A-type granites, southern Myanmar: Implications for tectonic setting, magma evolution and Sn–W mineralization

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

“…A negative Eu anomaly could indicate extraction of plagioclase from the melt during fractional crystallization or anataxis of granitic crust, a phenomena recognized in South China flare‐up magmatism (Chen & Grapes, ). The M‐type tetrad effect has also been discovered in rare‐metal granites of South China and SE Asian granitoid‐tin belt (Li et al, ; Zhao et al, ), further confirming a genetic relationship between the granite porphyry and W–Mo ores. The slope of REE patterns in the pyrite, magnetite, and galena varies from strictly horizontal to invariably tilted towards Lu.…”

Geochronology and geochemistry of volcanic rocks from the Tanjianshan Group, NW China: Implications for the early Palaeozoic tectonic evolution of the North Qaidam Orogen

“…They exhibit obvious oscillatory zoning and have Th/U ratios mostly >0.3, indicating a magmatic origin (Corfu, Hanchar, Hoskin, & Kinny, ; Hoskin & Schaltegger, ). In contrast, most Group 2 zircons from Formations d‐1 and d‐4 show irregular zoning or dark hues in CL images, indicating fluid alteration (Li, Sun, et al, ; Li et al, ; Li, Watanabe, & Yonezu, ; Sun, Li, Evans, Yang, & Wu, ). In addition, some Group 2 zircons (e.g., zjg‐24‐2‐15; Figure a) exhibit core‐rim textures reflecting crystallization of the core form a magma and growth of the rim from an orogenic fluid.…”

Mesozoic multi‐stage W–Sn polymetallic mineralization in the Nanling Range, South China: An example from the Dengfuxian–Xitian ore field

“…The second episode of magmatism and ore formation in the Nanling Range was characterized by widespread W–Sn polymetallic mineralization during the Late Jurassic (160–150 Ma; Li et al, ; Hu & Zhou, ; Chen et al, ; Zhang et al, ), forming the major parts of the Nanling W–Sn polymetallic ore belt. Tectonically, the second mineralization episode may have been related to an intracontinental rifting process that was triggered by changes in the subduction geometry of the palaeo‐Pacific Plate (Jiang et al, ; Li, Myint, et al, ; Wang et al, ).…”

“…South China is characterized by widely exposed granites and intensely developed mineral resources of Mesozoic age (Figure ; Cao, Wu, et al, ; Hua et al, ; Jiang & Zhu, ; Li, Li, & Li, ; Li, Myint, et al, ; Li, Watanabe, & Yonezu, ; Mao, Cheng, Chen, & Pirajno, ; Wang et al, ). The Nanling Range in the central part of South China hosts an economically important W–Sn polymetallic ore belt (Figure ; Shu, Wang, Sun, Xu, & Dai, ; Zhu et al, ) that contains more than 60% of the world's total W reserves and about 20% of the Sn reserves (Li et al, ; Mao et al, ; Sheng et al, ).…”

“…Although the behaviour of the Lu-Hf isotope system in hydrothermal zircons has been less studied, when combined with U-Pb dating and trace element data, it may provide substantial information concerning the sources and physico-chemical evolution of precipitating fluids and their relationship to hydrothermal alteration and ore mineralization processes (e.g., Kozlik, Raith, & Gerdes, 2016;Valley, Fisher, Hanchar, Lam, & Tubrett, 2010). South China is characterized by widely exposed granites and intensely developed mineral resources of Mesozoic age (Figure 1; Hua et al, 2003;Jiang & Zhu, 2017;Li, Li, & Li, 2007;Li, Myint, et al, 2018;Li, Watanabe, & Yonezu, 2014b;Mao, Cheng, Chen, & Pirajno, 2013;Wang et al, 2007). The Nanling Range in the central part of South China hosts an economically important W-Sn polymetallic ore belt (Figure 1; Shu, Wang, Sun, Xu, & Dai, 2011;Zhu et al, 2009) that contains more than 60% of the world's total W reserves and about 20% of the Sn reserves Mao et al, 2013;Sheng et al, 2015).…”