Genesis of Pb–Zn Mineralization Beneath the Xiangshan Uranium Orefield, South China: Constraints from H–O–S–Pb Isotopes and Rb–Sr Dating

Guo, Jing; Li, Ziying; Nie, Jiangtao; Zhizhang, Huang; Wang, Jian; Lai, Chun‐Kit

doi:10.1111/rge.12170

Cited by 7 publications

(4 citation statements)

References 26 publications

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“…The magmatic‐hydrothermal fluid exsolving from the silicate melt is expected to be Cl‐rich owing to the strong partitioning of Cl between the silicate melt and aqueous fluid and likely had a composition dominated by dissolved NaCl and CaCl 2 (Webster & Mandeville, 2007). Numerous previous studies of O, H, and S isotope geochemistry have demonstrated a magma‐derived ore‐forming fluids and a dominantly magmatic sulphur source for the Pb–Zn mineralization (Guo et al, 2018; Nie et al, 2018; Yang, 2015). In addition, the Pb–Zn mineralization was almost simultaneous with the crystallization of the subvolcanic rock suites (Guo et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

“…Numerous previous studies of O, H, and S isotope geochemistry have demonstrated a magma‐derived ore‐forming fluids and a dominantly magmatic sulphur source for the Pb–Zn mineralization (Guo et al, 2018; Nie et al, 2018; Yang, 2015). In addition, the Pb–Zn mineralization was almost simultaneous with the crystallization of the subvolcanic rock suites (Guo et al, 2018). Hence, we propose that the Cl‐rich fluid reflected by S‐Ap 1 and S‐Ap 2 may be derived from related magma.…”

Section: Discussionmentioning

confidence: 99%

“…The Pb–Zn orebodies present chiefly as lenses and veins and are broadly parallel to each other and characterized by major vein‐type and minor disseminated mineralization. The Rb–Sr isochron of pyrite yielded an age of 131.3 ± 4 Ma (Guo et al, 2018). The mineralized veins are surrounded by alteration halos ranging from 2 to 10 cm in width.…”

Section: Geological Backgroundmentioning

confidence: 99%

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Apatite at Niutoushan U–Pb–Zn deposit in Xiangshan ore field: A tracer for hydrothermal fluid

Wang

Wei³

2020

Geological Journal

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The volcanic‐hosted Xiangshan uranium ore field is the largest uranium deposit in Jiangxi Province, South China. In this ore field, Pb–Zn mineralization has been discovered beneath the uranium orebodies at Niutoushan‐Heyuanbei area. Apatite is a ubiquitous accessory mineral in the volcanic rocks, as well as the U and Pb–Zn alteration–mineralization zones. Six main types of apatite, which show the evolution of volcanic magma and hydrothermal fluids, have been observed on the basis of textures, associated mineral assemblages, chemical compositions (halogen, MnO, FeO, and SO3, etc.), and mineral inclusions. For magmatic primary apatite, porphyritic lava‐hosted P‐Apa and P‐Apb have higher F/Cl ratios and lower contents of MnO and FeO than rhyodacite‐hosted R‐Ap. For hydrothermal apatite, U‐Ap1‐a, U‐Ap1‐b, and S‐Ap1 are recognized as hydrothermal‐affected apatite, while U‐Ap2 and S‐Ap2 as apatite precipitating from hydrothermal fluid. U‐Ap1‐a and U‐Ap1‐b, hosted in the green‐stained alteration zone, are characterized by highly heterogeneous BSE imaging and contain monazite and ThSiO4 inclusions. Such apatites record the remobilization and reprecipitation of rare earth elements (REEs), Th and U by a relatively high‐temperature, F‐ and CO2‐enriched but Na‐depleted fluid at the early REE‐phase stage. U‐Ap2 occurring in pitchblende–fluorite dominated ore sample, is featured with negligible Cl, variable F and relatively higher Ti contents. It records a new hydrothermal pulse of relatively low temperature, oxidized, highly Ca‐, Ti‐, and F‐enriched but Cl‐depleted which probably conduces to leaching and transporting significant amounts of uranium. S‐Ap1 and S‐Ap2 hosted within the sericite–quartz–carbonate alteration halo on both sides of Pb–Zn–Fe sulphide veinlets, have relatively high Cl and variable F content. This apatite records reduced, Cl‐, Ca‐enriched, magmatic‐derived fluid events. Combined with previous researches, the apatite data suggest that U and Pb–Zn mineralization may form from two spatially and temporally distinct hydrothermal systems. Thus, apatite can fingerprint multi‐stage hydrothermal fluids and be treated as a useful tool for mineral exploration.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Geological Backgroundmentioning

confidence: 99%

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Apatite at Niutoushan U–Pb–Zn deposit in Xiangshan ore field: A tracer for hydrothermal fluid

Wang

Wei³

2020

Geological Journal

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“…6a-c). At the same time, iron-rich minerals such as pyrite, chalcopyrite and biotite are commonly found in the Egongtang uranium deposit, indicating that the migration of Fe 2þ may be affected by various occurrences in the process of hydrothermal alteration (Guo, 2014;Li et al 2016).…”

Section: A3 Element Migration Rulesmentioning

confidence: 99%

Hydrothermal alteration and element migration in the Egongtang uranium deposit, central Nanling Range, South China

Yan

Zhong²,

Pan³

et al. 2023

Geol. Mag.

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Hydrothermal alteration records fluid–rock interactions and can therefore be used to constrain element migrations during mineralization. Although hydrothermal alteration is widely developed in hydrothermal vein-type uranium deposits in South China, consideration of elemental mass changes during alteration has not been examined. The Egongtang uranium deposit in the central Nanling Range is mainly hosted by the Qingzhangshan granite in South China, and was strongly altered by K-feldspar, quartz, chlorite, illite, haematite, pyrite and carbonates. The alteration section can be divided into five horizontal zones: fresh granite (Zone V), a distal alkaline alteration zone (Zone IV), a chlorite-rich zone (Zone III), a close-to-ore sericite/illite alteration zone (Zone II) and a central mineralization zone with strong haematitization (Zone I). Whole-rock geochemistry of the altered samples indicates that from Zone IV to Zone I, the content of SiO2 and U increases significantly. The mass gains of SiO2, MgO and Fe2O3 were proportional to the concentration of U. The content of trace elements (such as Ba, K, La, Ce, Pr, Sr, P, Eu, etc.) gradually decreases from Zone V to Zone I. The rare earth elements manifest a decrease in light rare earth elements and a slight increase in heavy rare earth elements accordingly from Zone V to Zone I. This study shows that the ore materials of the Egongtang deposit were mainly derived from the Qingzhangshan granites. In the early alkali alterations, large amounts of U were partitioned into the fluids. In the ore-forming stage, ores precipitated accompanied by acid metasomatism such as chloritization, haematitization and carbonation.

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Molybdenum isotope variation mechanism and ore-genesis of Niutoushan Pb–Zn sulfide orebodies in the Xiangshan volcanic basin, South China

Wenfang

Liu²,

Sun³

et al. 2022

Journal of Geochemical Exploration

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Genesis of Pb–Zn Mineralization Beneath the Xiangshan Uranium Orefield, South China: Constraints from H–O–S–Pb Isotopes and Rb–Sr Dating

Cited by 7 publications

References 26 publications

Apatite at Niutoushan U–Pb–Zn deposit in Xiangshan ore field: A tracer for hydrothermal fluid

Apatite at Niutoushan U–Pb–Zn deposit in Xiangshan ore field: A tracer for hydrothermal fluid

Hydrothermal alteration and element migration in the Egongtang uranium deposit, central Nanling Range, South China

Molybdenum isotope variation mechanism and ore-genesis of Niutoushan Pb–Zn sulfide orebodies in the Xiangshan volcanic basin, South China

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