Multistage fluid sources and evolution of Qinglong Sb-(Au) deposit in northern margin of Youjiang basin, SW China: REE geochemistry and Sr-H-O isotopes of ore-related jasperoid, quartz and fluorite

Yang, Ruidong; Du, Liuying; Gao, Junbo; Zheng, Lulin; Huang, Zhilong

doi:10.1016/j.oregeorev.2020.103851

Cited by 20 publications

(9 citation statements)

References 80 publications

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“…Therefore, the Tangshang Au deposit may have originated from metamorphic fluids that were diluted with meteoric water in the shallow crust. [89]), Permian seawater [87], the Emeishan Basalt Formation [88], average mantle strontium isotope composition [85], and limestone from the middle Permian Maokou Formation in Qinglong (0.70683, [25]).…”

Section: Source Of Strontium and Au-bearing Fluidsmentioning

confidence: 99%

“…The origin of the Carlin-type deposits in the Dian-Qian-Gui district has been attributed to several sources, including sedimentary, metamorphic, and magmatic sources [8,9,13,16,[25][26][27][28][29]. The difficulty in adequately explaining the genesis of the Tangshang Au deposit is attributed to the lack of direct in situ isotope and trace elements data.…”

Section: Ore Deposit Genesismentioning

confidence: 99%

“…Therefore, investigations on the genesis of this deposit are necessary to improve the understanding of the associated Au mineralization and metallogenic system in the area. The main proposals regarding the origin of hydrothermal fluids rich in Au in the area include: (1) interaction with existing strata containing high concentrations of Au [16,25]; (2) the extraction of Au from sedimentary strata via metamorphic fluids [13,26]; and (3) the supply of Au from deep-seated magmatic intrusions [8,9,[27][28][29].…”

Section: Introductionmentioning

confidence: 99%

“…Figure 11. Plot showing the87 Sr/86 Sr versus 1/Sr values for calcite from the Tangshang Au deposit, Upper Devonian strata in the Youjiang Basin (0.70863-0.70898,[89]), Permian seawater[87], the Emeishan Basalt Formation[88], average mantle strontium isotope composition[85], and limestone from the middle Permian Maokou Formation in Qinglong (0.70683,[25]). …”

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confidence: 99%

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Genesis of the Tangshang Au Deposit in Southeast Yunnan Province, China: Constraints from In Situ Chemical and S-Sr Isotope Analyses

et al. 2022

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The Yunnan–Guizhou–Guangxi district (also known as the Dian–Qian–Gui “Golden Triangle”) in southwestern China contains numerous Carlin-type Au deposits (CTGDs). However, the sources of Au and Au-bearing fluids in these deposits remain controversial. The Tangshang Au deposit is a middle-sized CTGD in southeastern Yunnan Province. This study involved in situ chemical and S isotope analyses of sulfides and in situ trace elemental and Sr isotope analyses of ore-related calcite; these data were used to trace the sources of fluids and Au, as well as the genesis of this deposit. Four pyrite types (Py1, Py2, Py3, and Py4) and two arsenopyrite types (Apy1 and Apy2) were identified based on their textural characteristics. It was found that Py1 contains relatively lower Au, Sb, Cu, and Tl contents than those of Py2, Py3, and Py4. Py1 is wrapped by rim-Py2 and Py3, which indicates an early-ore-stage genesis. The Carlin-type mineralization elements are elevated in the pyrites (Au = 3.04–38.1 ppm; As = 40,932–65,833 ppm; Tl = 0 to 3.3 ppm; Sb = 1.2 to 343 ppm; and Cu = 10 to 102 ppm), and the average Co/Ni ratio is 0.54. Additionally, Au has a positive correlation with Tl and Cu. The high concentrations of As and Au in all types of pyrite indicate that the ore-forming fluids are rich in both elements. The sulfides in the ores were shown to produce similar S isotope ratios, which are obviously higher than the S isotope value of sulfide (~0‰) in Emeishan basalt; therefore, the integration of these and elemental composition data indicated that all pyrites (Py1, Py2, Py3, and Py4) form during the ore stage. These results also demonstrate that the δ34S values of the Au-bearing fluids are higher than those of basalt wall rocks. The flat chondrite-normalized REEs pattern and positive Eu anomaly of the calcite were similar to those obtained from Emeishan basalt, which suggests a reducing characteristic of hydrothermal fluids. The 87Sr/86Sr ratios (0.70557–0.70622) of calcite were also comparable to the range obtained from Emeishan basalt. Some slightly higher 87Sr/86Sr ratios, which ranged between those obtained from Emeishan basalt and limestone from the Maokou Formation, indicated that the Sr isotope ratios of the Au-bearing fluids are higher than those of Emeishan basalt. Based on data generated in the present study and the regional geology of this area, a genetic model involving a metamorphic fluid system was proposed for the Tangshang gold deposit, and a gold mineralization event related to metamorphic fluid in the south of the Dian–Qian–Gui “Golden Triangle” was indicated.

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Section: Source Of Strontium and Au-bearing Fluidsmentioning

confidence: 99%

Section: Ore Deposit Genesismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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Genesis of the Tangshang Au Deposit in Southeast Yunnan Province, China: Constraints from In Situ Chemical and S-Sr Isotope Analyses

et al. 2022

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“…Qinglong antimony ore field is located on southwest Guizhou depression of Nanpanjiang basin, and its antimony metal reserves (~ 0.21Mt) rank fifth in south China giant antimony metallogenic belt [19][20][21] (Figure 1). The characteristics of the deposit, ore-forming materials, ore-forming fluids, and ore-forming age have been studied deeply by predecessors [22][23][24][25][26][27][28][29][30][31][32][33]. As early as in the 1990s, some scholars reported that the Qinglong antimony deposit is rich in organic inclusions, and speculated that its formation is related to organic matter [34][35].…”

Section: Introductionmentioning

confidence: 99%

TSR Action and Genesis Mechanism of Antimony Deposit: Evidence From Aromatic Hydrocarbon Geochemistry of Bitumen in Paleo-Oil Reservoir Near Qinglong Ore Field, Southwestern Guizhou Depression, China

Yang¹,

Hu²,

Sai-hua³

et al. 2022

Preprint

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In Qinglong ore field, paleo-oil reservoir is found to be associated with antimony deposits, and they have close genetic relationship. In this study, aromatics geochemistry of paleo-oil reservoir bitumen was studied to further discuss the thermochemical sulfate reduction (TSR) reaction and the mechanism of antimony mineralization. A total of 124 aromatic compounds were identified by Gas chromatography-mass spectrometry (GC–MS) analysis in bitumen samples, including abundant phenanthrene series, dibenzothiophene series, fluoranthene series, chrysene series, and a small number of fluorene series, naphthalene series, dibenzofuran series, biphenyl series, triaromatic steroid series. Aromatic parameters such as trimethylnaphthalene index (TMNr), methylphenanthrene index (MPI), methylphenanthrene distribution fraction (MPDF, F1 and F2), methyldibenzothiophene parameter (MDR), C28TAS-20S/(20R+20S), and benzofluoranthene/benzo[e]pyrene indicate Qinglong paleo-oil reservoir is in over maturity level. The abundance of phenanthrene and chrysene aromatic compounds and a small amount of naphthalene series, benzofluoranthene, fluoranthene, pyrene, anthracene, retene, perylene and biphenyl suggest that the parent material of the paleo-oil reservoir was mainly low aquatic organisms, mixed with a small amount of higher plant. The detected a certain number of compounds, such as retene, triaromatic steroid series and perylene, the ternary diagram of DBF–DBT–F and binary plot of Pr/Ph–DBT/P, DBT/(F+DBT)–DBF/(F+DBF) and Pr/Ph–DBT/DBF reveal that the source rock of the paleo-oil reservoir was formed in the marine environment of weak oxidation and weak reduction. The comprehensive analysis shows that the Qinglong paleo-oil reservoir originated from Devonian source rocks, just like other paleo-oil reservoirs and natural gas reservoirs in the Nanpanjiang basin. Abundant dibenzothiophene series were detected, indicating that the paleo-oil reservoir underwent a certain degree of TSR reaction. We believe that the paleo-gas reservoir formed by the evolution of paleo-oil reservoir participated in antimony mineralization, that is, hydrocarbon organic matter acted as reducing agent and transformed SO42− in oilfield brine into H2S through TSR, providing reduced sulfur and creating environmental conditions for mineralization.

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Pollution characteristics and risk assessment of antimony and arsenic in a typical abandoned antimony smelter

Ren

Ran

Mou

et al. 2023

Environ Geochem Health

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Multistage fluid sources and evolution of Qinglong Sb-(Au) deposit in northern margin of Youjiang basin, SW China: REE geochemistry and Sr-H-O isotopes of ore-related jasperoid, quartz and fluorite

Cited by 20 publications

References 80 publications

Genesis of the Tangshang Au Deposit in Southeast Yunnan Province, China: Constraints from In Situ Chemical and S-Sr Isotope Analyses

Genesis of the Tangshang Au Deposit in Southeast Yunnan Province, China: Constraints from In Situ Chemical and S-Sr Isotope Analyses

TSR Action and Genesis Mechanism of Antimony Deposit: Evidence From Aromatic Hydrocarbon Geochemistry of Bitumen in Paleo-Oil Reservoir Near Qinglong Ore Field, Southwestern Guizhou Depression, China

Pollution characteristics and risk assessment of antimony and arsenic in a typical abandoned antimony smelter

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