Stable Isotopes and Halogen Geochemistry of the Huayuan Carbonate‐hosted Pb‐Zn Ore District, South China: Implications for the Salt Source of Ore‐forming Fluids

Yang, Zhen; Jiang, Mengjie; Zhao, Shuyun; Ding, Zhenju; He, Maowei

doi:10.1111/1755-6724.14857

Cited by 2 publications

(1 citation statement)

References 31 publications

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“…Fe-Mn carbonates, commonly encountered in deposits, serve as indicators for the nature, environment, and evolution of ore-forming fluids [16][17][18][19][20][21][22][23][24][25]. In our study, Fe-Mn carbonate is a pervasive mineral within the Erdaokan deposit and occurs abundantly in the ore. Microscopically, there is a conspicuous symbiotic relationship between Ag and Fe-Mn carbonate.…”

Section: Introductionmentioning

confidence: 64%

Characteristics and Metallogenic Significance of Fe-Mn Carbonate Minerals in the Erdaokan Ag Deposit, Heilongjiang Province, Northeast China: Constraints from Sm-Nd Geochronology and Trace Elements

Yang,

Li,

Wang

et al. 2024

Minerals

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Fe-Mn carbonate is the dominant mineral in the Erdaokan Ag deposit, which represents the first large independent silver deposit during the Late Triassic Period in the Duobaoshan Cu-Mo-Au mineralization concentrated area of Heilongjiang Province, NE China. The Fe-Mn carbonates in the deposit frequently co-exist with Ag minerals. Thus, the presence of Fe-Mn carbonates plays a crucial role in the ore-formation process, making their analysis essential for obtaining valuable metallogenic information about the Erdaokan deposit. Through microexamination, SEM and EDS analysis, a clear relationship between Fe-Mn carbonate minerals and Ag minerals was established. Furthermore, electron probe microanalysis, LA-ICP-MS, and Sr-Nd isotope tests were conducted to analyze Fe-Mn carbonates for significant metallogenic insights. The distribution pattern of trace elements and rare-earth elements in Fe-Mn carbonates is similar, characterized by Zr depletion (below 0.131 ppm), enrichment of light rare-earth elements, a noticeable deficit of Eu (δEu = 0.06–0.63), and an average Y/Ho value of 34.29, indicating the involvement of upper mantle-derived deep magma in the formation of ore-forming materials. The samples had a Sm-Nd isochron age of 233.7 ± 1.2 Ma, suggesting that the Erdaokan Ag deposit was formed during the Late Triassic Period. This study highlights the significance of Fe-Mn carbonate as a valuable mineral indicator for regional silver prospecting purposes, and confirms the Late Triassic Period as another important metallogenic stage in the Duobaoshan Cu-Mo-Au mineralization concentrated area.

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Section: Introductionmentioning

confidence: 64%

Characteristics and Metallogenic Significance of Fe-Mn Carbonate Minerals in the Erdaokan Ag Deposit, Heilongjiang Province, Northeast China: Constraints from Sm-Nd Geochronology and Trace Elements

Yang,

Li,

Wang

et al. 2024

Minerals

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Hydrothermal fluid characteristics of the huayuan Pb-Zn orefield: Constraints from apatite major and trace element compositions

et al. 2023

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The Huayuan orefield in the SW Yangtze Block (SW China) is a world-class Pb-Zn orefield, with over 20 million tonnes (Mt) metal reserve. However, the Pb-Zn ore fluid source and evolution in Huayuan remain controversial. This study determined the major and trace element compositions of the newly-identified apatite from the Pb-Zn ores, using electron microprobe analysis (EMPA) and laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). The apatite samples are of hydrothermal origin, and have high CaO (52.57–57.15 wt%), P2O5 (39.26–42.88 wt%) and F (1.82–3.90 wt%) but low Cl (< 0.42 wt%) contents. The samples have total rare Earth element content (ΣREE) of 74.07–1,255.34 ppm, and they all show negative Eu and weakly positive Ce anomalies. The result suggests that the apatite was formed in an environment with decreasing oxygen fugacity, and in relatively F-rich, Cl-poor, and REE-poor ore-forming fluid. We geochemically compared the apatite from Huayuan with those from different geneses by Fisher discriminant. The result suggests that the Huayuan apatite is distinct from typical magmatic and purely hydrothermal apatite, and that the ore-forming fluids may have had multiple sources. The mixing of fluids with different origins may have triggered significant metal ore deposition.

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Stable Isotopes and Halogen Geochemistry of the Huayuan Carbonate‐hosted Pb‐Zn Ore District, South China: Implications for the Salt Source of Ore‐forming Fluids

Cited by 2 publications

References 31 publications

Characteristics and Metallogenic Significance of Fe-Mn Carbonate Minerals in the Erdaokan Ag Deposit, Heilongjiang Province, Northeast China: Constraints from Sm-Nd Geochronology and Trace Elements

Characteristics and Metallogenic Significance of Fe-Mn Carbonate Minerals in the Erdaokan Ag Deposit, Heilongjiang Province, Northeast China: Constraints from Sm-Nd Geochronology and Trace Elements

Hydrothermal fluid characteristics of the huayuan Pb-Zn orefield: Constraints from apatite major and trace element compositions

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