Geological, Isotopic and Geochronological Constraints on Hetaoping Distal Skarn‐Type Zn‐Pb‐Ag‐Cu Deposits in Baoshan Palaeozoic Massif, SW China

Xue, Chuandong; Wei, Aiying; Liao, Cheng; Wang, Jianrong; Han, Yi; Li, Jing; Xiang, Kun

doi:10.1111/1755-6724.12377_19

Cited by 4 publications

(2 citation statements)

References 2 publications

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“…Among these, the Early Paleozoic stratum indicates the widest range of exposure as well as the most complete development, characterized by the presence of shallow-semi-deep marine carbonates, clastic rocks, siliceous rocks, and shale deposits [12]. Most carbonates and clastic rocks have metamorphosed into marble, marbled limestone, and silty slate [13].…”

Section: Regional Geological Backgroundmentioning

confidence: 99%

Geochemical Characteristics and Zircon U-Pb Geochronology of Diabase in the Jinchanghe Mining Area, Western Yunnan, SW China: Implications for Tectonic and Magmatic Evolution of the Baoshan Block

Liu

Zhang

et al. 2022

Minerals

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The Jinchanghe Fe-Cu-Pb-Zn polymetallic deposit is located in the northern Baoshan block in the Sanjiang metallogenic belt, southwestern China, and is one of the major large-scale Pb-Zn polymetallic deposits. This region is characterized by numerous diabase intrusions; however, research work is limited. This study elucidated systematic geochemistry and chronology of the diabase closely associated with orebodies in Jinchanghe to provide constraints for magma evolution. The results indicated that the Jinchanghe diabase was enriched in CaO, MgO, and Al2O3 and depleted in TiO2 and P2O5. Large ion lithophile elements were depleted, while for high field strength elements, the ratio of LREEs but depleted in HREEs. The zircon U-Pb dating results suggested that the diabase age could be divided into two stages, indicating the occurrence of two-stage tectonic-magmatic events in the Late Triassic and Early Cretaceous. The results also suggested that the metallogenic age of the Jinchanghe deposit is the Early Cretaceous. Moreover, the age was closely related to the collision after the closure of the mid-Tethys Ocean in the Early Cretaceous. Therefore, the results of this study provide new evidence for the tectonic-magmatic evolution and mineralization of the Baoshan block.

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Section: Regional Geological Backgroundmentioning

confidence: 99%

Geochemical Characteristics and Zircon U-Pb Geochronology of Diabase in the Jinchanghe Mining Area, Western Yunnan, SW China: Implications for Tectonic and Magmatic Evolution of the Baoshan Block

Liu

Zhang

et al. 2022

Minerals

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“…The Baoshan‐Shidian anticline is a district‐scale, N‐S‐trending fold in the Baoshan Block and is cut by the NE‐trending faults. The Baoshan Block hosts a number of large polymetallic deposits, such as the Luziyuan skarn‐type Pb‐Zn deposit (Zhu et al, 2011), Dongshan hydrothermal deposit (Xue et al, ), Hetaoping skarn‐type Pb‐Zn deposit (Xue et al, ), and Mengxing MVT/sedimentary‐reformed deposit (Luo, ; Guo, 2011; Y. C. Liu, Hou, et al, ; Figure b).…”

Section: Geologic Settingmentioning

confidence: 99%

Ore genesis of the Xiyi Pb‐Zn deposit, western Yunnan province, China: Geologic, fluid inclusion, and isotopic (C‐H‐O‐S‐Pb) evidence

Gao

Zhang

et al. 2017

Geological Journal

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The Xiyi Pb‐Zn deposit, located in the Baoshan Block of the Sanjiang region in western Yunnan, China, contains 1.2 Mt of Pb‐Zn resources. The orebodies are hosted by Devonian‐Carboniferous limestone, structurally controlled by the NE‐trending fractures, and occur in stratiform, vein, and lenticular forms. The mineral assemblage of the ores includes sphalerite, galena, pyrite, arsenopyrite, chalcopyrite, and marcasite. Calcite, barite, and quartz occur as gangue minerals. Three stages of hydrothermal mineralization are recognized based on the ore textures, crosscutting relationship, and mineral assemblages: an early stage of sphalerite + galena + calcite (Stage 1), a middle stage of galena + arsenopyrite + calcite ± sphalerite (Stage 2), and a late stage of calcite + pyrite ± barite ± quartz (Stage 3). Two types of fluid inclusions are associated with the different ore‐forming hydrothermal stages: aqueous inclusions and hydrocarbon‐H2O inclusions. The ore‐forming fluids were characterized by low temperatures (100 ~ 200 °C), medium salinities (8 ~ 20 wt% NaCleq), and medium densities (1.0 ~ 1.1 g/cm3) and contained minor amounts of CH4. The δDH2O and calculated δ18OH2O values of the Stage 1 calcite range from −89‰ to −103‰ and from 1.5‰ to 5.5‰, respectively, indicating that the H2O in the hydrothermal fluids was derived from seawater that had reacted with organic matter. The δ13CPDB and δ18OSMOW values of the calcite associated with Stages 1 and 3 range from −5.2‰ to 3.2‰ and from 12.5‰ to 20.0‰, respectively. These data plot in the field between marine carbonate and granites and are close to the marine carbonate field, suggesting that the CO2 in the ore‐forming fluids was derived from the dissolution of marine carbonate in the sedimentary rocks. The galena, sphalerite, and pyrite in Stages 1 and 3 have a narrow range of δ34S values (0–3‰), which is lower than the δ34S values of early Carboniferous to Middle‐Late Devonian seawater sulfate (+18‰ to +23‰). Therefore, because the mineralization is unrelated to magmatic activity, the sulfur in the hydrothermal sulfides was derived from regional marine sulfates primarily via organic reduction at temperatures of 100 to 200 °C. The lead isotopic compositions in the galena, sphalerite, and pyrite in Stages 1 and 3 are very similar to those in the diagenetic pyrite in the host rocks, plotting in the field of the upper crust Pb evolution curve. Thus, the lead source was likely the Carboniferous and Devonian strata. The geologic, fluid inclusion, and isotopic (C‐H‐O‐S‐Pb) evidence in this study suggests that the Xiyi Pb‐Zn deposit is a Mississippi Valley‐type deposit.

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Genesis of the sediment-hosted Haerdaban Zn–Pb deposit, Western Tianshan, NW China: Rb–Sr sphalerite and U–Pb zircon geochronological constraints

Jiang

Zhang

Duan

et al. 2021

Int J Earth Sci (Geol Rundsch)

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Geological, Isotopic and Geochronological Constraints on Hetaoping Distal Skarn‐Type Zn‐Pb‐Ag‐Cu Deposits in Baoshan Palaeozoic Massif, SW China

Cited by 4 publications

References 2 publications

Geochemical Characteristics and Zircon U-Pb Geochronology of Diabase in the Jinchanghe Mining Area, Western Yunnan, SW China: Implications for Tectonic and Magmatic Evolution of the Baoshan Block

Geochemical Characteristics and Zircon U-Pb Geochronology of Diabase in the Jinchanghe Mining Area, Western Yunnan, SW China: Implications for Tectonic and Magmatic Evolution of the Baoshan Block

Ore genesis of the Xiyi Pb‐Zn deposit, western Yunnan province, China: Geologic, fluid inclusion, and isotopic (C‐H‐O‐S‐Pb) evidence

Genesis of the sediment-hosted Haerdaban Zn–Pb deposit, Western Tianshan, NW China: Rb–Sr sphalerite and U–Pb zircon geochronological constraints

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