Metallogenic Processes: Evidences from Zoning Patterns of Mineralization and alteration and fluid inclusion geochemistry in the Lehong Zn‐Pb Deposit in Northeastern Yunnan, China

Zhao, Dong; Ren, Han; Ren, Tao; Wang, Jiasheng; Zhang, Xiaopei; Wu, Yongtao; Cui, Jianhua

doi:10.1111/1755-6724.13280

Cited by 3 publications

(4 citation statements)

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“…The REE patterns and La/Yb N ratios of barite can be used to distinguish the ore genesis [48]. The La/Yb N values of barite from the Banbianjie deposit are similar to those of the Lehong MVT Pb-Zn deposit in Yunnan province, suggesting that their ore genesis is similar, and both belong to MVT deposits [25]. In addition, barite of the Banbianjie deposit has significantly different REE characteristics from those of the Zhenning-Ziyun Devonian large-scale hot-water sedimentary barite deposits (Figure 6d, [48]), the Guangxi hot-water sedimentary barite deposits [79] and magmatic genesis barite deposits [80].…”

Section: Ore Genesismentioning

confidence: 93%

“…In our previous study, isotope geochemistry was used to trace the source of oreforming elements (such as S and Pb) [14]. As the trace elements characteristics of hydrothermal minerals depend on the nature, composition and physical-chemical condition of ore-forming fluids [21][22][23][24][25], they are widely used to explore the nature, source and evolution of hydrothermal fluids. Based on the previously reported whole-rock rare earth elements (REE) of partial dolomite [14], this paper analyzed the in situ trace elements (including REE) of gangue minerals (dolomite, calcite and barite) from the Banbianjie Ge-Zn deposit to reveal this issue, which provided more abundant geochemical information for comprehending the ore genesis of the deposit.…”

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: Ore Genesismentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

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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“…Through study on REE characteristics of submarine high-temperature hydrothermal system, Ding et al (2000) find obvious positive Eu anomaly in the system [40]. Eu anomaly may be affected by either metallogenic hydrothermal fluid or compositions of tectonite [41]. Various tectonite-mineralized alteration lithofacies zones of R1 "black/fracture zone" mainly comprise carbonatite of Sinian Dengying Formation which is characterized by negative Eu anomaly [26], but different degrees of positive Eu anomaly occurs in these zones, apparently indicating that positive Eu anomaly in these zones are mainly affected by ore-forming fluid.…”

Section: Element Characteristics and Significance Of Tectonite-minera...mentioning

confidence: 99%

The Zoning Rule and Forming Mechanism of Tectonite-Mineralized Alteration Lithofacies of “Black/Fracture Zone” of the Daliangzi Pb-Zn Deposit in Southwest Sichuan of China

Li,

Han,

et al. 2024

Preprint

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As one of the typical deposits in Sichuan-Yunnan-Guizhou Pb-Zn metallogenic province, the Daliangzi Pb-Zn deposit has a close genetic relation with the structural system of “black/fracture zone” formed under the action of NWW-approx. EW strike-slip structures in the metallogenic province, but the mechanism of rock and ore-controlling action of the structural system remains unclear. Based on detailed analysis of tectonite-mineralized alteration lithofacies of R1 “black/fracture zone”, the tectonite-mineralized alteration lithofacies zones can be divided into 4 types in succession outward from the Pb-Zn mineralization center, i.e., ① brecciated and stockwork-like Pb-Zn mineralization-complex breccia facies zone, ② stockwork-like Pb-Zn mineralization-simple breccia and cataclasite facies zone, ③ veined pyrite-sulfide-dolomitic cataclasite facies zone, and ④ fine-veined calcite-black carbonized dolomite facies zone; Cl- and SO42--rich high-temperature oxidizing ore-bearing fluid mixes with reducing fluid in Zone ① while migration and precipitation occur in Zone ④. With the evolution of ore-forming fluid, the homogenization temperature decreases from Zone ① to Zone ④, the salinity increases from Zone ① to Zone ② and then decreases to Zones ③ and ④, and the fluid density has little change on the whole; the contents of Zn, Pb, Cu, Ga, Ge, Cd, Ag, and other metallogenic elements, the Zn/Pb ratio, and the CaO/MgO mole ratio decrease gradually from Zone ① to Zone ④; and REE fractionation, calcilization, silicification, and pyritization enhance gradually from Zone ① to Zone ④. This series of changes are the product of diapirism (cryptoexplosion) of strike-slip structures and “black/fracture zone”, among which the second-order structures (F5, F100, and other faults) derived from NWW-approx. EW striking dextral shear-tension faults F1 and F15 control the brecciated and stockwork-like Pb-Zn mineralized complex breccia facies zones and the stockwork-like Pb-Zn mineralized simple breccia and cataclasite facies zones. Therefore, this paper establishes the zoning mode of tectonite-mineralized alteration lithofacies of “black/fracture zone” and proposes that Zones ① and ② are important prospecting criteria. conclusions.

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“…The altered lithofacies formed in the process of hydrothermal mineralization can reflect different physical and chemical conditions, and different mineral assemblages reflect different physical and chemical conditions. The mineral assemblages and characteristics in the different alteration zones indicate the occurrence of orebodies, and the relationship between mineralization and alteration is intuitively reflected by establishing the mineralization and alteration variations [45][46][47][48][49][50].…”

Section: Alteration Zone Divisionmentioning

confidence: 99%

Study on the Hydrothermal Superposition Period: Mineralization–Alteration Zoning Model and Zoning Mechanism of the Dahongshan Fe-Cu Deposit in Yunnan Province

Mao,

Han,

Zhao

et al. 2024

Minerals

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The Dahongshan large-scale iron (Fe)–copper (Cu) polymetallic deposit is in the Proterozoic metallogenic domain on the western margin of the Yangtze Block. It is a typical representative of Fe-Cu polymetallic composite mineralization in the Kangdian area. The deposit comprises a group of layered orebodies formed by volcanic exhalation sedimentation and metamorphism, and a group of vein-like orebodies formed by hydrothermal superposition. The large-scale mapping of altered lithofacies in the deposit has resolved issues of weak links and unclear mineralization and alteration zoning of hydrothermal superimposed deposits within the study area. The mineralization type, hydrothermal alteration type and intensity, mineral assemblage, and mineral structure of the vein-type Cu polymetallic deposits during the hydrothermal superposition period are meticulously analyzed and studied. Finally, the zoning relationships of vein orebodies (mineralization) are summarized. On the basis of the results of the study of the distribution pattern of this mineral body, a mineralization alteration zoning model of the hydrothermal superposition period is constructed. The results show that the alteration is primarily silicification, carbonation, and chloritization, and the mineralization is chalcopyrite, bornite, chalcocite, and pyrite. The Dibadu anticline and the cutting layer faults and fractures strictly control the hydrothermal alteration zoning. The mineralization alteration zoning from the core to the flank is divided into coarse vein zone (I) → stockwork zone (II) → veinlet zone (III). The corresponding mineral assemblages are quartz–calcite–chalcocite–bornite–(native copper) (I) → calcite–dolomite–quartz–bornite–chalcopyrite–chlorite (II) → dolomite–quartz–chalcopyrite–(pyrite) (III), where the stockwork zone has the most substantial mineralization. The mineral assemblages of each alteration zone, the characteristics of rare earth elements of typical samples, and the test results on the fluid inclusions confirm that pH and Eh primarily control the zoning mechanism. This study has significance for deepening the understanding of the composite metallogenic system, guiding deep and peripheral prospecting, and providing significant enlightenment for the study of this type of deposit.

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Metallogenic Processes: Evidences from Zoning Patterns of Mineralization and alteration and fluid inclusion geochemistry in the Lehong Zn‐Pb Deposit in Northeastern Yunnan, China

Cited by 3 publications

References 1 publication

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

The Zoning Rule and Forming Mechanism of Tectonite-Mineralized Alteration Lithofacies of “Black/Fracture Zone” of the Daliangzi Pb-Zn Deposit in Southwest Sichuan of China

Study on the Hydrothermal Superposition Period: Mineralization–Alteration Zoning Model and Zoning Mechanism of the Dahongshan Fe-Cu Deposit in Yunnan Province

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