An evolving MVT hydrothermal system: Insights from the Niujiaotang Cd-Zn ore field, SW China

Zhou, Jia‐Xi; Yang, Zhi-Mou; An, Yun-Lin; Luo, Kai; Liu, Chunxue; Ju, Yiwen

doi:10.1016/j.jseaes.2022.105357

Cited by 11 publications

(5 citation statements)

References 66 publications

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“…This suggests that the initial ore-forming fluids have high Fe/Mn ratios. In contrast, the Sr/Ba ratios of hydrothermal calcite and dolomite (8-634) are higher than those of altered dolostone (6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17). This indicates that the Sr/Ba ratios are increased during the mineralization process.…”

Section: Evolution Of Ore-forming Fluidsmentioning

confidence: 94%

“…This indicates that the Sr/Ba ratios are increased during the mineralization process. In addition, The Th/U ratios of altered dolostone from the Banbianjie deposit are between 0.29 and 0.88, which are quite different from those of hydrothermal calcite and dolomite (0.26-241) and barite (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13). This implies that the Th/U ratios of hydrothermal fluids have an evolutionary trend of increasing first and then decreasing.…”

Section: Evolution Of Ore-forming Fluidsmentioning

confidence: 97%

“…The study area is located in the southeastern margin of the Yangtze Block, SW China, which is an important part of the Western Hunan-Eastern Guizhou (WHEG) Pb-Zn metallogenic belt and contains many dispersed element-rich Pb-Zn deposits (such as Cdrich Niujiaotang and Ge-rich Zhulingou and Banbianjie) [4][5][6][7][8]. The distribution of these deposits is jointly controlled by the WE-trending Huangsi and NE-trending Mandong faults [9].…”

Section: Introductionmentioning

confidence: 99%

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Trace Elements of Gangue Minerals from the Banbianjie Ge-Zn Deposit in Guizhou Province, SW China

Zhou

Meng

et al. 2023

Minerals

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There are many dispersed element-rich Pb-Zn deposits hosted by Paleozoic carbonate rocks in the Middle-Upper Yangtze Block, China. The origin and nature of the ore-forming fluids that formed them are still much debated (syngenetic vs. epigenetic). The Banbianjie Ge-Zn deposit is located in the southeastern margin of the Yangtze Block, SW China. It is a newly discovered medium-sized Zn (Zn metal reserves > 0.39 Mt, @1.78%–9.5% Zn) and large-scale Ge deposit (Ge metal resources > 900 t, @100 × 10−6–110 × 10−6 Ge) in the Western Hunan–Eastern Guizhou Pb-Zn metallogenic belt, SW China. Gangue minerals in the Banbianjie deposit are very developed, including calcite, dolomite and barite, which are closely associated with sulfides. Hence, the trace elements of gangue minerals could be used to trace the nature, source and evolution of ore-forming fluids, and the ore genesis of this deposit can be discussed. These gangue minerals are nearly horizontally distributed in the plot of La/Ho-Y/Ho, suggesting that they are the products of the same hydrothermal fluids. The total rare earth element (∑REE) contents from calcite and dolomite to barite show an increasing trend, indicating that the REEs in the ore-forming fluids were mainly enriched in barite. Hence, the ∑REE of barite can approximately represent the ΣREE of the hydrothermal fluids, which are quite similar to those of the underlying strata, indicating that the ore-forming fluids were likely originated from and/or flowed through them. The Eu anomalies from dolomite (Eu/Eu* = 0.33–0.66) to calcite (Eu/Eu* = 0.29–1.13) and then to barite (Eu/Eu* = 1.64–7.71) show an increasing trend, suggesting that the ore-forming fluids experienced a shift in the ore-forming environment from reduced to oxidized. Hence, the source of the Banbianjie Ge-Zn deposit is the underlying strata, and the ore-forming physical–chemical condition has experienced a transition from reduction to oxidation during the Ge-Zn mineralization. The ore genesis of the Banbianjie Ge-Zn deposit is most likely a Mississippi Valley-type (MVT) deposit.

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Section: Evolution Of Ore-forming Fluidsmentioning

confidence: 94%

Section: Evolution Of Ore-forming Fluidsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Trace Elements of Gangue Minerals from the Banbianjie Ge-Zn Deposit in Guizhou Province, SW China

Zhou

Meng

et al. 2023

Minerals

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“…Sphalerite is the main carrier of the dispersed element Cd [4,44]. The scatter plot shows that Cd has a good positive correlation with Hg (R 2 = 0.83) (Figure 9a), but it Minerals 2023, 13, 793 11 of 20 has a negative correlation with Pb, Mn, and Tl (R 2 = 0.44, 0.35, and 0.39, respectively) (Figure 9b-d).…”

Section: Cadmium Elementmentioning

confidence: 97%

“…Sphalerite is the main carrier of the dispersed element Cd [4,44]. The scatter plo shows that Cd has a good positive correlation with Hg (R 2 = 0.83) (Figure 9a), but it has negative correlation with Pb, Mn, and Tl (R 2 = 0.44, 0.35, and 0.39, respectively) (Figure 9b The scatter plot also shows that Cd has a different relationship with Fe than other trace elements.…”

Section: Cadmium Elementmentioning

confidence: 99%

LA-ICP-MS Trace Element Geochemistry of Sphalerite and Metallogenic Constraints: A Case Study from Nanmushu Zn–Pb Deposit in the Mayuan District, Shaanxi Province, China

Hui-xin

Cheng

et al. 2023

Minerals

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The Nanmushu Zn–Pb deposit is a large-scale and representative deposit in the Mayuan ore field on the northern margin of the Yangtze Block. This study investigates the trace element geochemistry of sphalerite from this deposit using laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). The results show that the main trace elements in sphalerite include various trace elements, such as Mn, Fe, Cu, Ga, Ge, Ag, Cd, Pb, Co, Hg, Tl, In, Sn, and Sb. Among them, Ag, Ge, Cd, and Cu are valuable components that may be recovered during mineral processing or smelting techniques. The histograms, LA-ICP-MS time-resolved depth profiles, and linear scan profiles indicated that most trace elements occur in sphalerite as isomorphs, while partial Pb, Fe, and Ag occur as tiny mineral inclusions. The correlation diagrams of trace elements revealed that Fe2+, Mn2+, Pb2+, and Tl3+ can substitute Zn2+ in sphalerite through isomorphism. In sphalerite, Cd2+ and Hg2+ together or Mn2+, Pb2+, and Tl3+ together can replace Zn2+, i.e., ((3Mn, 3Pb, 2Tl)6+, 3(Cd, Hg)2+) ↔ 3Zn2+. Moreover, there is a mechanism of Ge4+ with Cu+ or Ga3+ with Cu+ replacing Zn2+ in the Nanmushu deposit, i.e., Ge4+ + 2Cu+↔ 3Zn2+ or 2Ga3+ + 2Cu+↔ 4Zn2+. Furthermore, the trace element compositions indicate that the Nanmushu Zn mineralization occurred under low-temperature conditions (<200 °C) and should be classified as a Mississippi Valley-type (MVT) deposit. This study provides new insights into the occurrence and substitution mechanisms of trace elements in sphalerite and the metallogenic constraints of the Nanmushu deposit.

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Sulfide S-Zn-Cd isotopes and origin of the Liangyan Zn-Pb deposit in the Sichuan-Yunnan-Guizhou metallogenic province, SW China

et al. 2023

Journal of Asian Earth Sciences

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An evolving MVT hydrothermal system: Insights from the Niujiaotang Cd-Zn ore field, SW China

Cited by 11 publications

References 66 publications

Trace Elements of Gangue Minerals from the Banbianjie Ge-Zn Deposit in Guizhou Province, SW China

Trace Elements of Gangue Minerals from the Banbianjie Ge-Zn Deposit in Guizhou Province, SW China

LA-ICP-MS Trace Element Geochemistry of Sphalerite and Metallogenic Constraints: A Case Study from Nanmushu Zn–Pb Deposit in the Mayuan District, Shaanxi Province, China

Sulfide S-Zn-Cd isotopes and origin of the Liangyan Zn-Pb deposit in the Sichuan-Yunnan-Guizhou metallogenic province, SW China

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