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Open AccessOpen Access JUSTC Earth and Space 25 June 2024

Infrared microthermometry of fluid inclusion in sphalerite: A case study of the Xinqiao deposit in the Middle–Lower Yangtze metallogenic belt

  • 1.

    State Key Laboratory of Lithospheric and Environmental Coevolution, School of Earth and Space Sciences, University of Science of Technology of China, Hefei 230026, China

  • 2.

    CAS Center for Excellence in Comparative Planetology, Hefei 230026, China

Cite this:
https://doi.org/10.52396/JUSTC-2023-0054
More Information
  • Author Bio:

    Yangyang Wang is an Associate Research Fellow at the School of Earth and Space Sciences, University of Science and Technology of China (USTC). He received his Ph.D. degree from USTC in 2017. His research mainly focuses on fluid inclusion and isotope geochemistry

    Yilin Xiao is a Professor at the School of Earth and Space Sciences, University of Science and Technology of China. He received his Ph.D. degree from the University of Goettingen (Germany) in 2001. His research mainly focuses on geological fluids, metamorphism in subduction zones, and trace element and isotope geochemistry

  • Corresponding author: E-mail: ylxiao@ustc.edu.cn
  • Received Date: 27 September 2022
  • Accepted Date: 04 October 2023
    • Available Online: 25 June 2024
    Abstract

  • Abstract

    Infrared microthermometry allows direct measurement of fluid inclusions hosted in opaque ore minerals and can provide direct constraints on the evolution of ore-forming fluids. This study presents infrared microthermometry of spherite-hosted fluid inclusions from the Xinqiao deposit in the Middle–Lower Yangtze Metallogenic Belt and sheds new light on the ore genesis of the deposit. Considering that infrared light may lead to non-negligible temperature deviations during microthermometry, some tests were first conducted to ensure the accuracy of the microthermometric measurements. The measurement results indicated that using the lowest light intensity of the microscope and inserting an optical filter were effective in minimizing the possible temperature deviations of infrared microthermometry. All sphalerite-hosted fluid inclusions from the Xinqiao deposit were aqueous. They show homogenization temperature ranging from ~200 to 350 °C, but have two separate salinity groups (1.0 wt% – 10 wt% and 15.1 wt% – 19.2 wt% NaCl equivalent). The low-salinity group represents sedimentary exhalative (SEDEX)-associated fluids, whereas the high-salinity group results from modification by later magmatic hydrothermal fluids. Combined with published fluid inclusion data, the four-stage fluid evolution of the Xinqiao deposit was depicted. Furthermore, our data suggest that the Xinqiao deposit was formed by two-stage metallogenic events including SEDEX and magmatic-hydrothermal mineralization.

    Graphical abstract

    Fluid inclusions (FIs) in sphalerite and other minerals recorded a four-stage ore-forming fluid evolution in the Xinqiao deposit.

    Abstract

    Infrared microthermometry allows direct measurement of fluid inclusions hosted in opaque ore minerals and can provide direct constraints on the evolution of ore-forming fluids. This study presents infrared microthermometry of spherite-hosted fluid inclusions from the Xinqiao deposit in the Middle–Lower Yangtze Metallogenic Belt and sheds new light on the ore genesis of the deposit. Considering that infrared light may lead to non-negligible temperature deviations during microthermometry, some tests were first conducted to ensure the accuracy of the microthermometric measurements. The measurement results indicated that using the lowest light intensity of the microscope and inserting an optical filter were effective in minimizing the possible temperature deviations of infrared microthermometry. All sphalerite-hosted fluid inclusions from the Xinqiao deposit were aqueous. They show homogenization temperature ranging from ~200 to 350 °C, but have two separate salinity groups (1.0 wt% – 10 wt% and 15.1 wt% – 19.2 wt% NaCl equivalent). The low-salinity group represents sedimentary exhalative (SEDEX)-associated fluids, whereas the high-salinity group results from modification by later magmatic hydrothermal fluids. Combined with published fluid inclusion data, the four-stage fluid evolution of the Xinqiao deposit was depicted. Furthermore, our data suggest that the Xinqiao deposit was formed by two-stage metallogenic events including SEDEX and magmatic-hydrothermal mineralization.

    • Public Summary

    • Low light intensity can minimize temperature deviations during infrared microthermometry.
    • Sphalerite-hosted fluid inclusions in the Xinqiao deposit are aqueous and have two groups with contrasting salinity.
    • The Xinqiao deposit is formed by two-stage metallogenic events including sedimentary exhalative and magmatic-hydrothermal mineralization.

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    • References(64)
  • [1]
    Campbell A R, Robinsoncook S. Infrared fluid inclusion microthermometry on coexisting wolframite and quartz. Economic Geology, 1987, 82 (6): 1640–1645. doi: 10.2113/gsecongeo.82.6.1640
    [2]
    Campbell A R, Panter K S. Comparison of fluid inclusions in coexisting (cogenetic?) wolframite, cassiterite, and quartz from St. Michael’s Mount and Cligga Head, Cornwall, England. Geochimica et Cosmochimica Acta, 1990, 54 (3): 673–681. doi: 10.1016/0016-7037(90)90363-p
    [3]
    Lüders V. Contribution of infrared microscopy to fluid inclusion studies in some opaque minerals (wolframite, stibnite, bournonite): Metallogenic implications. Economic Geology and the Bulletin of the Society of Economic Geologists, 1996, 91 (8): 1462–1468. doi: 10.2113/gsecongeo.91.8.1462
    [4]
    Wilkinson J J, Stoffell B, Wilkinson C C, et al. Anomalously metal-rich fluids form hydrothermal ore deposits. Science, 2009, 323 (5915): 764–767. doi: 10.1126/science.1164436
    [5]
    Kouzmanov K, Pettke T, Heinrich C A. Direct analysis of ore-precipitating fluids: Combined IR microscopy and LA-ICP-MS study of fluid inclusions in opaque ore minerals. Economic Geology, 2010, 105 (2): 351–373. doi: 10.2113/gsecongeo.105.2.351
    [6]
    Wei W F, Hu R Z, Bi X W, et al. Infrared microthermometric and stable isotopic study of fluid inclusions in wolframite at the Xihuashan tungsten deposit, Jiangxi Province, China. Mineralium Deposita, 2012, 47 (6): 589–605. doi: 10.1007/s00126-011-0377-0
    [7]
    Krolop P, Burisch M, Richter L, et al. Antimoniferous vein-type mineralization of the Berga Antiform, Eastern-Thuringia, Germany: A fluid inclusion study. Chemical Geology, 2019, 508: 47–61. doi: 10.1016/j.chemgeo.2018.02.034
    [8]
    Naglik B, Dumanska-Slowik M, Tobola T, et al. Diversity of pyrite-hosted solid inclusions and their metallogenic implications: A case study from the Myszkow Mo–Cu–W porphyry deposit (the Krakow–Lubliniec Fault Zone, Poland). Minerals, 2021, 11 (12): 1426. doi: 10.3390/min11121426
    [9]
    Sośnicka M, de Graaf S, Morteani G, et al. The Schlaining quartz-stibnite deposit, Eastern Alps, Austria: constraints from conventional and infrared microthermometry and isotope and crush-leach analyses of fluid inclusions. Mineralium Deposita, 2022, 57 (5): 725–741. doi: 10.1007/s00126-021-01076-x
    [10]
    Ni P, Li W S, Pan J Y, et al. Fluid processes of wolframite-quartz vein systems: Progresses and challenges. Minerals, 2022, 12 (2): 237. doi: 10.3390/min12020237
    [11]
    Bailly L, Bouchot V, Beny C, et al. Fluid inclusion study of stibnite using infrared microscopy: An example from the Brouzils antimony deposit (Vendee, Armorican Massif, France). Economic Geology and the Bulletin of the Society of Economic Geologists, 2000, 95 (1): 221–226. doi: 10.2113/gsecongeo.95.1.221
    [12]
    Bailly L, Grancea L, Kouzmanov K. Infrared microthermometry and chemistry of wolframite from the Baia Sprie epithermal deposit, Romania. Economic Geology and the Bulletin of the Society of Economic Geologists, 2002, 97 (2): 415–423. doi: 10.2113/gsecongeo.97.2.415
    [13]
    Shimizu T, Morishita Y. Petrography, chemistry, and near-infrared microthermometry of indium-bearing sphalerite from the Toyoha polymetallic deposit, Japan. Economic Geology, 2012, 107 (4): 723–735. doi: 10.2113/econgeo.107.4.723
    [14]
    Lüders V. Contribution of infrared microscopy to studies of fluid inclusions hosted in some opaque ore minerals: possibilities, limitations, and perspectives. Mineralium Deposita, 2017, 52 (5): 663–673. doi: 10.1007/s00126-016-0694-4
    [15]
    Ni P, Wang X D, Wang G G, et al. An infrared microthermometric study of fluid inclusions in coexisting quartz and wolframite from Late Mesozoic tungsten deposits in the Gannan metallogenic belt, South China. Ore Geology Reviews, 2015, 65: 1062–1077. doi: 10.1016/j.oregeorev.2014.08.007
    [16]
    Ni P, Li W S, Pan J Y. Ore-forming fluid and metallogenic mechanism of wolframite-quartz vein-type tungsten deposits in South China. Acta Geologica Sinica (English Edition), 2020, 94 (6): 1774–1796. doi: 10.1111/1755-6724.14596
    [17]
    Ortelli M, Kouzmanov K, Wälle M, et al. Fluid inclusion studies in opaque ore minerals: Ⅰ. Trace element content and physical properties of ore minerals controlling textural features in transmitted near-infrared light microscopy. Economic Geology, 2018, 113 (8): 1845–1860. doi: 10.5382/econgeo.2018.4615
    [18]
    Korges M, Weis P, Luders V, et al. Sequential evolution of Sn–Zn–In mineralization at the skarn-hosted Hammerlein deposit, Erzgebirge, Germany, from fluid inclusions in ore and gangue minerals. Mineralium Deposita, 2020, 55 (5): 937–952. doi: 10.1007/s00126-019-00905-4
    [19]
    Mao J W, Xie G Q, Duan C, et al. A tectono-genetic model for porphyry–skarn–stratabound Cu–Au–Mo–Fe and magnetite–apatite deposits along the Middle–Lower Yangtze River Valley, Eastern China. Ore Geology Reviews, 2011, 43 (1): 294–314. doi: 10.1016/j.oregeorev.2011.07.010
    [20]
    Zhou T F, Fan Y, Yuan F, et al. Progress of geological study in the Middle–Lower Yangtze River Valley metallogenic belt. Acta Petrologica Sinica, 2012, 28 (10): 3051–3066. (in Chinese)
    [21]
    Zhou T F, Fan Y, Wang S W, et al. Metallogenic regularity and metallogenic model of the Middle–Lower Yangtze River Valley metallogenic belt. Acta Petrologica Sinica, 2017, 33 (11): 3353–3372. (in Chinese)
    [22]
    Gu L, Khin Z, Hu W, et al. Distinctive features of Late Palaeozoic massive sulphide deposits in South China. Ore Geology Reviews, 2007, 31: 107–138. doi: 10.1016/j.oregeorev.2005.01.002
    [23]
    Guo W M, Lu J J, Jiang S Y, et al. Re–Os isotope dating of pyrite from the footwall mineralization zone of the Xinqiao deposit, Tongling, Anhui Province: Geochronological evidence for submarine exhalative sedimentation. Chinese Science Bulletin, 2011, 56 (35): 3860–3865. doi: 10.1007/s11434-011-4770-y
    [24]
    Xie J C, Yang X Y, Sun W D, et al. Geochronological and geochemical constraints on formation of the Tongling metal deposits, middle Yangtze metallogenic belt, east-central China. International Geology Review, 2009, 51 (5): 388–421. doi: 10.1080/00206810802712004
    [25]
    Wang Y Y, Xiao Y L, Yang X Y. Re–Os isotope systematics and fluid inclusions of Xinqiao deposit in Tongling, the Middle–Lower Yangtze River metallogenic belt. Acta Petrologica Sinica, 2015, 31 (4): 1031–1039. (in Chinese)
    [26]
    Xiao X, Zhou T F, Fan Y, et al. LA-ICP-MS in situ trace elements and FE-SEM analysis of pyrite from the Xinqiao Cu–Au–S deposit in Tongling, Anhui and its constraints on the ore genesis. Acta Petrologica Sinica, 2016, 32 (2): 369–376. (in Chinese)
    [27]
    Zhang Y, Shao Y J, Li H B, et al. Genesis of the Xinqiao Cu–S–Fe–Au deposit in the Middle–Lower Yangtze River Valley metallogenic belt, Eastern China: Constraints from U–Pb–Hf, Rb–Sr, S, and Pb isotopes. Ore Geology Reviews, 2017, 86: 100–116. doi: 10.1016/j.oregeorev.2017.02.014
    [28]
    Zhang Y, Shao Y J, Wu C D, et al. LA-ICP-MS trace element geochemistry of garnets: Constraints on hydrothermal fluid evolution and genesis of the Xinqiao Cu–S–Fe–Au deposit, Eastern China. Ore Geology Reviews, 2017, 86: 426–439. doi: 10.1016/j.oregeorev.2017.03.005
    [29]
    Li Y, Li J W, Li X H, et al. An Early Cretaceous carbonate replacement origin for the Xinqiao stratabound massive sulfide deposit, Middle–Lower Yangtze metallogenic belt, China. Ore Geology Reviews, 2017, 80: 985–1003. doi: 10.1016/j.oregeorev.2016.08.017
    [30]
    Shuey R T. Semiconducting Ore Minerals. New York: Elsevier, 1975.
    [31]
    Boldish S I, White W B. Optical band gaps of selected ternary sulfide minerals. American Mineralogist, 1998, 83: 865–871. doi: 10.2138/am-1998-7-818
    [32]
    Ni P, Zhu X, Wang R, et al. Constraining ultrahigh-pressure (UHP) metamorphism and titanium ore formation from an infrared microthermometric study of fluid inclusions in rutile from Donghai UHP eclogites, eastern China. GSA Bulletin, 2008, 120: 1296–1304. doi: 10.1130/b26090.1
    [33]
    Bauer M E, Burisch M, Ostendorf J, et al. Trace element geochemistry of sphalerite in contrasting hydrothermal fluid systems of the Freiberg district, Germany: insights from LA-ICP-MS analysis, near-infrared light microthermometry of sphalerite-hosted fluid inclusions, and sulfur isotope geochemistry. Mineralium Deposita, 2019, 54: 237–262. doi: 10.1007/s00126-018-0850-0
    [34]
    Peng H W, Fan H R, Lecumberri-Sanchez P, et al. Fluid evolution and ore genesis of the Tiantangshan granite-related vein-type Rb–Sn–W deposit, south China: constraints from LA-ICP-MS analyses of fluid inclusions. Mineralium Deposita, 2023, 58 (4): 751–769. doi: 10.1007/s00126-022-01155-7
    [35]
    Lindaas S E, Kulis J, Campbell A R. Near-infrared observation and microthermometry of pyrite-hosted fluid inclusions. Economic Geology, 2002, 97 (3): 603–618. doi: 10.2113/gsecongeo.97.3.603
    [36]
    Pflugbeil B. Mikrothermometrische untersuchungen an flüssigkeitseinschlüssen in wolframiten aus quarz-wolframit-mineralisationen mittels IR-mikroskopie. Thesis. Berlin: Technische Universität Berlin, 1995 : 59.
    [37]
    Shimizu T, Aoki M, Kabashima T. Near-infrared and visible light microthermometry of fluid inclusions in sphalerite from a possible southeast extension of the Toyoha polymetallic deposit, Japan. Resource Geology, 2003, 53 (2): 115–126. doi: 10.1111/j.1751-3928.2003.tb00163.x
    [38]
    Rosiere C A, Rios F J. The origin of hematite in high-grade iron ores based on infrared microscopy and fluid inclusion studies: The example of the Conceicao Mine, Quadrilatero Ferrifero, Brazil. Economic Geology and the Bulletin of the Society of Economic Geologists, 2004, 99 (3): 611–624. doi: 10.2113/gsecongeo.99.3.611
    [39]
    Lüders V, Ziemann M. Possibilities and limits of infrared light microthermometry applied to studies of pyrite-hosted fluid inclusions. Chemical Geology, 1999, 154: 169–178. doi: 10.1016/s0009-2541(98)00130-2
    [40]
    Kouzmanov K, Bailly L, Ramboz C, et al. Morphology, origin and infrared microthermometry of fluid inclusions in pyrite from the Radka epithermal copper deposit, Srednogorie zone, Bulgaria. Mineralium Deposita, 2002, 37 (6-7): 599–613. doi: 10.1007/s00126-002-0270-y
    [41]
    Zhu M T, Zhang L C, Wu G, et al. Fluid inclusions and He–Ar isotopes in pyrite from the Yinjiagou deposit in the southern margin of the North China Craton: A mantle connection for poly-metallic mineralization. Chemical Geology, 2013, 351: 1–14. doi: 10.1016/j.chemgeo.2013.05.004
    [42]
    Moritz R. Fluid salinities obtained by infrared microthermometry of opaque minerals: Implications for ore deposit modeling — A note of caution. Journal of Geochemical Exploration, 2006, 89: 284–287. doi: 10.1016/j.gexplo.2005.11.068
    [43]
    Ge X, Su W C, Zhu L Y, et al. A study on the influence of infrared light source intensity on salinity of fluid inclusion in opaque mineral by using infrared microthermometry: in the case of stibnite. Acta Mineralogica Sinica, 2011, 31: 366–371. (in Chinese)
    [44]
    Casanova V, Kouzmanov K, Audetat A, et al. Fluid inclusion studies in opaque ore minerals: Ⅱ. A comparative study of syngenetic synthetic fluid inclusions hosted in quartz and opaque minerals. Economic Geology, 2018, 113 (8): 1861–1883. doi: 10.5382/econgeo.2018.4616
    [45]
    Peng H W, Fan H R, Santosh M, et al. Infrared microthermometry of fluid inclusions in transparent to opaque minerals: challenges and new insights. Mineralium Deposita, 2020, 55 (7): 1425–1440. doi: 10.1007/s00126-019-00950-z
    [46]
    Goldstein R H, Reynolds T J. Systematics of Fluid Inclusions in Diagenetic Minerals. Tulsa, USA: SEPM Society for Sedimentary Geology, 1994.
    [47]
    Zhu X, Ni P, Huang J B, et al. Introduction to Infrared micro-thermometric technique: An example from fluid inclusion study in rutile deposits. Acta Petrologica Sinica, 2007, 23 (9): 2052–2058. (in Chinese) doi: 10.3969/j.issn.1000-0569.2007.09.004
    [48]
    Li Y S, Zhang B L, Gong F Y, et al. Genesis of the giant Kangjiawan lead-zinc ore deposit in Hunan Province: Evidences from fluid inclusion, H–O and S isotope. Acta Petrologica Sinica, 2021, 37 (6): 1847–1866. (in Chinese) doi: 10.18654/1000-0569/2021.06.13
    [49]
    Wang Y B, Liu D Y, Meng Y F, et al. SHRIMP U–Pb geochronology of the Xinqiao Cu–S–Fe–Au deposit in the Tongling ore district, Anhui. Chinese Geology, 2004, 31 (2): 169–173. (in Chinese) doi: 10.3969/j.issn.1000-3657.2004.02.008
    [50]
    Bodnar R J. Revised equation and table for determining the freezing-point depression of H2O–NaCl solutions. Geochimica et Cosmochimica Acta, 1993, 57 (3): 683–684. doi: 10.1016/0016-7037(93)90378-a
    [51]
    Ramboz C, Pichavant M, Weisbrod A. Fluid immiscibility in natural processes: Use and misuse of fluid inclusion data. 2. Interpretation of fluid inclusion data in terms of immiscibility. Chemical Geology, 1982, 37: 29–48. doi: 10.1016/0009-2541(82)90065-1
    [52]
    Wang D, Zheng Y, Yang W, et al. Geology, mineralogy, fluid inclusion, and H–O–S–Pb isotope constraints on ore genesis of the Keyue Sb–Pb–Zn–Ag deposit in Southern Tibet. Geofluids, 2018, 2018: 3175423. doi: 10.1155/2018/3175423
    [53]
    Wang Z G, Wang K Y, Wan D, et al. Genesis of the Huanggoushan Pb–Zn–Au polymetallic deposit in southern Jilin Province, NE China: Constraints from fluid inclusions and C–H–O–S–Pb isotope systematics. Geological Journal, 2020, 55 (4): 3112–3138. doi: 10.1002/gj.3586
    [54]
    Hanilçi N, Öztürk H, Banks D, et al. Geological, geochemical and microthermometric characteristics of the Hakkari region Zn–Pb deposits, SE Turkey. Ore Geology Reviews, 2020, 125: 103667. doi: 10.1016/j.oregeorev.2020.103667
    [55]
    Siani M G, Mehrabi B, Nazarian M, et al. Geology and genesis of the Chomalu polymetallic deposit, NW Iran. Ore Geology Reviews, 2022, 143: 104763. doi: 10.1016/j.oregeorev.2022.104763
    [56]
    Huang C, Du G, Jiang H, et al. Ore-forming fluids characteristics and metallogenesis of the Anjing Hitam Pb–Zn deposit in Northern Sumatra, Indonesia. Journal of Earth Science, 2019, 30 (1): 131–141. doi: 10.1007/s12583-019-0859-z
    [57]
    Yang J, Yang X, Yang C, et al. Genesis of the Talate Pb–Zn (–Fe) deposit in the Altay, Xinjiang, NW China: Evidence from fluid inclusions and stable isotopes. Ore Geology Reviews, 2022, 144: 104864. doi: 10.1016/j.oregeorev.2022.104864
    [58]
    Xu J, Xie Y, Yang Z, et al. Trace elements in fluid inclusions of submarine exhalation-sedimentation system in Tongling metallogenic province. Mineral Deposits, 2004, 23 (3): 344–352. (in Chinese) doi: 10.3969/j.issn.0258-7106.2004.03.008
    [59]
    Zhou T F, Zhang L J, Yuan F, et al. LA-ICP-MS in situ trace element analysis of pyrite from the Xinqiao Cu–Au–S deposit in Tongling, Anhui, and its constraints on the ore genesis. Earth Science Frontiers, 2010, 17 (2): 306–319. (in Chinese)
    [60]
    Xu G, Zhou J. The Xinqiao Cu–S–Fe–Au deposit in the Tongling mineral district, China: Synorogenic remobilization of a stratiform sulfide deposit. Ore Geology Reviews, 2001, 18: 77–94. doi: 10.1016/s0169-1368(01)00017-8
    [61]
    Xiao X, Gu L, Ni P, et al. Study on fluids of SEDEX massive sulfide deposits in Tongling district, Anhui Province. Mineral Deposits, 2002, 21 (Suppl.): 491–494. (in Chinese)
    [62]
    Xu W Y, Yang Z S, Meng Y F, et al. Genetic model and dynamic migration of ore-forming fluids in carboniferous exhalation-sedimentary massive sulfide deposits of Tongling district, Anhui Province. Mineral Deposits, 2004, 23 (3): 353–364. doi: 10.3969/j.issn.0258-7106.2004.03.009
    [63]
    Jiang S Y, Ding Q F, Yang S Y, et al. Discovery and significance of carbonate mud mounds from Cu-polymetallic deposits in the Middle and Lower Yangtze metallogenic belt: Examples from the Wushan and Dongguashan deposits. Acta Geologica Sinica, 2011, 85 (5): 744–756. (in Chinese)
    [64]
    Mahmoodi P, Rastad E, Rajabi A, et al. Genetic model for Jurassic shale-hosted Zn–Pb deposits of the Arak Mining District, Malayer-Esfahan metallogenic belt: Insight from sedimentological, textural, and stable isotope characteristics. Ore Geology Reviews, 2021, 136: 104262. doi: 10.1016/j.oregeorev.2021.104262
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    Figure  1.  Cycling method for infrared microthermometry to measure final ice melting temperature (Tm) of opaque minerals (modified after Goldstein and Reynolds[46] and Peng et al. [45]). T0, T1, and T2 represent room temperature, a temperature low enough for freezing (generally < –60 oC), and estimated eutectic temperature of the target inclusion system, respectively. (a) The inclusion is cooled to T1 to ensure freezing during every cooling step with infrared (IR) light on. During every heating step, the IR light is turned off and the final temperature for heating is set to be a little higher than the front heating step (T5>T4>T3). The final temperature for heating is regarded as Tm once abrupt change of bubble is observed during the subsequent cooling step. (b) After the first cooling to freeze the inclusion, the final temperature for every cooling step is set to be around estimated eutectic temperature of the target inclusion system. Tm could be recorded when no bubble change is observed during the cooling step.

    Figure  2.  Cycling method for infrared microthermometry to measure homogenization temperature (Th) of opaque minerals (modified after Goldstein and Reynolds[46] and Peng et al. [45]). T0 represents room temperature. T1 is the temperature slightly lower than the estimated Th or lower than the transition temperature for the host mineral to become opaque. For every heating step the infrared (IR) light is turned off and the final temperature is set to increase step by step. The IR light is turned on during the cooling steps in order to observe whether there is a bubble in the inclusion. The final temperature for heating during the cycles could be regarded as Th when the bubble disappears after the subsequent cooling step.

    Figure  3.  Simplified geological map for the Xinqiao deposit (a) and fluid inclusions in sphalerite (b–g). The sample location is marked as blue star. All the fluid inclusions show primary signature except for the right bottom photo (g) in which the fluid inclusions are of secondary origin. (f) shows the relative age of different groups (low salinity versus high salinity) of fluid inclusions. l: liquid; v: vapor.

    Figure  4.  Effects from infrared light intensity (a) and condenser and field diaphragms (b) on the temperature deviations during infrared microthermometry on the standard quartz-hosted CO2 inclusion (USGS). (a) The colors inside the symbols represent different light intensities used during microthermometry. The light intensity number is proportional to the light powder but not real powder value in Watt. (b) The colors inside the symbols represent different condenser diaphragms whereas symbol styles represent different field diaphragms. The light intensity of Degree 6 is used during these measurements.

    Figure  5.  Effects from infrared light intensity (a) and condenser and field diaphragms (b) on the temperature deviations during infrared microthermometry on a sphalerite-hosted saline inclusion. (a): The colors inside the symbols represent different light intensities used during microthermometry. The light intensity number is proportional to the light powder but not real powder value. (b): The colors inside the symbols represent different condenser diaphragms whereas symbol styles represent different field diaphragms. The light intensity of Degree 5 is used during these measurements.

    Figure  6.  Violin statistics diagrams for salinity (a) and homogenization temperature (b) of inclusions in different host minerals from the Xinqiao deposit. Data of sphalerite-hosted inclusions are from this study, where the other data sources are listed in the abscissa labels. Quartz SK: quartz in skarn. Quartz SS: quartz in sand stone.

    Figure  7.  Fluid inclusion microthermometric data of global sphalerite-bearing deposits. Every colorful line represents data of a particular inclusion series that are hosted in the same mineral type or formed during the same stage. The left and right endpoints of the colorful lines are minimum and maximum values (homogenization temperature and salinity) for the particular inclusion series. The alternative color regions between solid horizontal lines represent different deposit types, whereas the region between dashed horizontal line represents the individual deposit as is numbered in the right boundary. The data source could be referred in Table S1 of Supporting Information. MVT: Mississippi valley type. SEDEX: sedimentary exhalative deposit.

    Figure  8.  Salinity versus homogenization temperature diagram of the inclusions in the Xinqiao deposit. The four-stage ore-forming fluid evolution is illustrated as four different dashed boxes. (b) is the amplifying diagram of the data in Stage Ⅰ box. SEDEX: sedimentary exhalative deposit.

    [1]
    Campbell A R, Robinsoncook S. Infrared fluid inclusion microthermometry on coexisting wolframite and quartz. Economic Geology, 1987, 82 (6): 1640–1645. doi: 10.2113/gsecongeo.82.6.1640
    [2]
    Campbell A R, Panter K S. Comparison of fluid inclusions in coexisting (cogenetic?) wolframite, cassiterite, and quartz from St. Michael’s Mount and Cligga Head, Cornwall, England. Geochimica et Cosmochimica Acta, 1990, 54 (3): 673–681. doi: 10.1016/0016-7037(90)90363-p
    [3]
    Lüders V. Contribution of infrared microscopy to fluid inclusion studies in some opaque minerals (wolframite, stibnite, bournonite): Metallogenic implications. Economic Geology and the Bulletin of the Society of Economic Geologists, 1996, 91 (8): 1462–1468. doi: 10.2113/gsecongeo.91.8.1462
    [4]
    Wilkinson J J, Stoffell B, Wilkinson C C, et al. Anomalously metal-rich fluids form hydrothermal ore deposits. Science, 2009, 323 (5915): 764–767. doi: 10.1126/science.1164436
    [5]
    Kouzmanov K, Pettke T, Heinrich C A. Direct analysis of ore-precipitating fluids: Combined IR microscopy and LA-ICP-MS study of fluid inclusions in opaque ore minerals. Economic Geology, 2010, 105 (2): 351–373. doi: 10.2113/gsecongeo.105.2.351
    [6]
    Wei W F, Hu R Z, Bi X W, et al. Infrared microthermometric and stable isotopic study of fluid inclusions in wolframite at the Xihuashan tungsten deposit, Jiangxi Province, China. Mineralium Deposita, 2012, 47 (6): 589–605. doi: 10.1007/s00126-011-0377-0
    [7]
    Krolop P, Burisch M, Richter L, et al. Antimoniferous vein-type mineralization of the Berga Antiform, Eastern-Thuringia, Germany: A fluid inclusion study. Chemical Geology, 2019, 508: 47–61. doi: 10.1016/j.chemgeo.2018.02.034
    [8]
    Naglik B, Dumanska-Slowik M, Tobola T, et al. Diversity of pyrite-hosted solid inclusions and their metallogenic implications: A case study from the Myszkow Mo–Cu–W porphyry deposit (the Krakow–Lubliniec Fault Zone, Poland). Minerals, 2021, 11 (12): 1426. doi: 10.3390/min11121426
    [9]
    Sośnicka M, de Graaf S, Morteani G, et al. The Schlaining quartz-stibnite deposit, Eastern Alps, Austria: constraints from conventional and infrared microthermometry and isotope and crush-leach analyses of fluid inclusions. Mineralium Deposita, 2022, 57 (5): 725–741. doi: 10.1007/s00126-021-01076-x
    [10]
    Ni P, Li W S, Pan J Y, et al. Fluid processes of wolframite-quartz vein systems: Progresses and challenges. Minerals, 2022, 12 (2): 237. doi: 10.3390/min12020237
    [11]
    Bailly L, Bouchot V, Beny C, et al. Fluid inclusion study of stibnite using infrared microscopy: An example from the Brouzils antimony deposit (Vendee, Armorican Massif, France). Economic Geology and the Bulletin of the Society of Economic Geologists, 2000, 95 (1): 221–226. doi: 10.2113/gsecongeo.95.1.221
    [12]
    Bailly L, Grancea L, Kouzmanov K. Infrared microthermometry and chemistry of wolframite from the Baia Sprie epithermal deposit, Romania. Economic Geology and the Bulletin of the Society of Economic Geologists, 2002, 97 (2): 415–423. doi: 10.2113/gsecongeo.97.2.415
    [13]
    Shimizu T, Morishita Y. Petrography, chemistry, and near-infrared microthermometry of indium-bearing sphalerite from the Toyoha polymetallic deposit, Japan. Economic Geology, 2012, 107 (4): 723–735. doi: 10.2113/econgeo.107.4.723
    [14]
    Lüders V. Contribution of infrared microscopy to studies of fluid inclusions hosted in some opaque ore minerals: possibilities, limitations, and perspectives. Mineralium Deposita, 2017, 52 (5): 663–673. doi: 10.1007/s00126-016-0694-4
    [15]
    Ni P, Wang X D, Wang G G, et al. An infrared microthermometric study of fluid inclusions in coexisting quartz and wolframite from Late Mesozoic tungsten deposits in the Gannan metallogenic belt, South China. Ore Geology Reviews, 2015, 65: 1062–1077. doi: 10.1016/j.oregeorev.2014.08.007
    [16]
    Ni P, Li W S, Pan J Y. Ore-forming fluid and metallogenic mechanism of wolframite-quartz vein-type tungsten deposits in South China. Acta Geologica Sinica (English Edition), 2020, 94 (6): 1774–1796. doi: 10.1111/1755-6724.14596
    [17]
    Ortelli M, Kouzmanov K, Wälle M, et al. Fluid inclusion studies in opaque ore minerals: Ⅰ. Trace element content and physical properties of ore minerals controlling textural features in transmitted near-infrared light microscopy. Economic Geology, 2018, 113 (8): 1845–1860. doi: 10.5382/econgeo.2018.4615
    [18]
    Korges M, Weis P, Luders V, et al. Sequential evolution of Sn–Zn–In mineralization at the skarn-hosted Hammerlein deposit, Erzgebirge, Germany, from fluid inclusions in ore and gangue minerals. Mineralium Deposita, 2020, 55 (5): 937–952. doi: 10.1007/s00126-019-00905-4
    [19]
    Mao J W, Xie G Q, Duan C, et al. A tectono-genetic model for porphyry–skarn–stratabound Cu–Au–Mo–Fe and magnetite–apatite deposits along the Middle–Lower Yangtze River Valley, Eastern China. Ore Geology Reviews, 2011, 43 (1): 294–314. doi: 10.1016/j.oregeorev.2011.07.010
    [20]
    Zhou T F, Fan Y, Yuan F, et al. Progress of geological study in the Middle–Lower Yangtze River Valley metallogenic belt. Acta Petrologica Sinica, 2012, 28 (10): 3051–3066. (in Chinese)
    [21]
    Zhou T F, Fan Y, Wang S W, et al. Metallogenic regularity and metallogenic model of the Middle–Lower Yangtze River Valley metallogenic belt. Acta Petrologica Sinica, 2017, 33 (11): 3353–3372. (in Chinese)
    [22]
    Gu L, Khin Z, Hu W, et al. Distinctive features of Late Palaeozoic massive sulphide deposits in South China. Ore Geology Reviews, 2007, 31: 107–138. doi: 10.1016/j.oregeorev.2005.01.002
    [23]
    Guo W M, Lu J J, Jiang S Y, et al. Re–Os isotope dating of pyrite from the footwall mineralization zone of the Xinqiao deposit, Tongling, Anhui Province: Geochronological evidence for submarine exhalative sedimentation. Chinese Science Bulletin, 2011, 56 (35): 3860–3865. doi: 10.1007/s11434-011-4770-y
    [24]
    Xie J C, Yang X Y, Sun W D, et al. Geochronological and geochemical constraints on formation of the Tongling metal deposits, middle Yangtze metallogenic belt, east-central China. International Geology Review, 2009, 51 (5): 388–421. doi: 10.1080/00206810802712004
    [25]
    Wang Y Y, Xiao Y L, Yang X Y. Re–Os isotope systematics and fluid inclusions of Xinqiao deposit in Tongling, the Middle–Lower Yangtze River metallogenic belt. Acta Petrologica Sinica, 2015, 31 (4): 1031–1039. (in Chinese)
    [26]
    Xiao X, Zhou T F, Fan Y, et al. LA-ICP-MS in situ trace elements and FE-SEM analysis of pyrite from the Xinqiao Cu–Au–S deposit in Tongling, Anhui and its constraints on the ore genesis. Acta Petrologica Sinica, 2016, 32 (2): 369–376. (in Chinese)
    [27]
    Zhang Y, Shao Y J, Li H B, et al. Genesis of the Xinqiao Cu–S–Fe–Au deposit in the Middle–Lower Yangtze River Valley metallogenic belt, Eastern China: Constraints from U–Pb–Hf, Rb–Sr, S, and Pb isotopes. Ore Geology Reviews, 2017, 86: 100–116. doi: 10.1016/j.oregeorev.2017.02.014
    [28]
    Zhang Y, Shao Y J, Wu C D, et al. LA-ICP-MS trace element geochemistry of garnets: Constraints on hydrothermal fluid evolution and genesis of the Xinqiao Cu–S–Fe–Au deposit, Eastern China. Ore Geology Reviews, 2017, 86: 426–439. doi: 10.1016/j.oregeorev.2017.03.005
    [29]
    Li Y, Li J W, Li X H, et al. An Early Cretaceous carbonate replacement origin for the Xinqiao stratabound massive sulfide deposit, Middle–Lower Yangtze metallogenic belt, China. Ore Geology Reviews, 2017, 80: 985–1003. doi: 10.1016/j.oregeorev.2016.08.017
    [30]
    Shuey R T. Semiconducting Ore Minerals. New York: Elsevier, 1975.
    [31]
    Boldish S I, White W B. Optical band gaps of selected ternary sulfide minerals. American Mineralogist, 1998, 83: 865–871. doi: 10.2138/am-1998-7-818
    [32]
    Ni P, Zhu X, Wang R, et al. Constraining ultrahigh-pressure (UHP) metamorphism and titanium ore formation from an infrared microthermometric study of fluid inclusions in rutile from Donghai UHP eclogites, eastern China. GSA Bulletin, 2008, 120: 1296–1304. doi: 10.1130/b26090.1
    [33]
    Bauer M E, Burisch M, Ostendorf J, et al. Trace element geochemistry of sphalerite in contrasting hydrothermal fluid systems of the Freiberg district, Germany: insights from LA-ICP-MS analysis, near-infrared light microthermometry of sphalerite-hosted fluid inclusions, and sulfur isotope geochemistry. Mineralium Deposita, 2019, 54: 237–262. doi: 10.1007/s00126-018-0850-0
    [34]
    Peng H W, Fan H R, Lecumberri-Sanchez P, et al. Fluid evolution and ore genesis of the Tiantangshan granite-related vein-type Rb–Sn–W deposit, south China: constraints from LA-ICP-MS analyses of fluid inclusions. Mineralium Deposita, 2023, 58 (4): 751–769. doi: 10.1007/s00126-022-01155-7
    [35]
    Lindaas S E, Kulis J, Campbell A R. Near-infrared observation and microthermometry of pyrite-hosted fluid inclusions. Economic Geology, 2002, 97 (3): 603–618. doi: 10.2113/gsecongeo.97.3.603
    [36]
    Pflugbeil B. Mikrothermometrische untersuchungen an flüssigkeitseinschlüssen in wolframiten aus quarz-wolframit-mineralisationen mittels IR-mikroskopie. Thesis. Berlin: Technische Universität Berlin, 1995 : 59.
    [37]
    Shimizu T, Aoki M, Kabashima T. Near-infrared and visible light microthermometry of fluid inclusions in sphalerite from a possible southeast extension of the Toyoha polymetallic deposit, Japan. Resource Geology, 2003, 53 (2): 115–126. doi: 10.1111/j.1751-3928.2003.tb00163.x
    [38]
    Rosiere C A, Rios F J. The origin of hematite in high-grade iron ores based on infrared microscopy and fluid inclusion studies: The example of the Conceicao Mine, Quadrilatero Ferrifero, Brazil. Economic Geology and the Bulletin of the Society of Economic Geologists, 2004, 99 (3): 611–624. doi: 10.2113/gsecongeo.99.3.611
    [39]
    Lüders V, Ziemann M. Possibilities and limits of infrared light microthermometry applied to studies of pyrite-hosted fluid inclusions. Chemical Geology, 1999, 154: 169–178. doi: 10.1016/s0009-2541(98)00130-2
    [40]
    Kouzmanov K, Bailly L, Ramboz C, et al. Morphology, origin and infrared microthermometry of fluid inclusions in pyrite from the Radka epithermal copper deposit, Srednogorie zone, Bulgaria. Mineralium Deposita, 2002, 37 (6-7): 599–613. doi: 10.1007/s00126-002-0270-y
    [41]
    Zhu M T, Zhang L C, Wu G, et al. Fluid inclusions and He–Ar isotopes in pyrite from the Yinjiagou deposit in the southern margin of the North China Craton: A mantle connection for poly-metallic mineralization. Chemical Geology, 2013, 351: 1–14. doi: 10.1016/j.chemgeo.2013.05.004
    [42]
    Moritz R. Fluid salinities obtained by infrared microthermometry of opaque minerals: Implications for ore deposit modeling — A note of caution. Journal of Geochemical Exploration, 2006, 89: 284–287. doi: 10.1016/j.gexplo.2005.11.068
    [43]
    Ge X, Su W C, Zhu L Y, et al. A study on the influence of infrared light source intensity on salinity of fluid inclusion in opaque mineral by using infrared microthermometry: in the case of stibnite. Acta Mineralogica Sinica, 2011, 31: 366–371. (in Chinese)
    [44]
    Casanova V, Kouzmanov K, Audetat A, et al. Fluid inclusion studies in opaque ore minerals: Ⅱ. A comparative study of syngenetic synthetic fluid inclusions hosted in quartz and opaque minerals. Economic Geology, 2018, 113 (8): 1861–1883. doi: 10.5382/econgeo.2018.4616
    [45]
    Peng H W, Fan H R, Santosh M, et al. Infrared microthermometry of fluid inclusions in transparent to opaque minerals: challenges and new insights. Mineralium Deposita, 2020, 55 (7): 1425–1440. doi: 10.1007/s00126-019-00950-z
    [46]
    Goldstein R H, Reynolds T J. Systematics of Fluid Inclusions in Diagenetic Minerals. Tulsa, USA: SEPM Society for Sedimentary Geology, 1994.
    [47]
    Zhu X, Ni P, Huang J B, et al. Introduction to Infrared micro-thermometric technique: An example from fluid inclusion study in rutile deposits. Acta Petrologica Sinica, 2007, 23 (9): 2052–2058. (in Chinese) doi: 10.3969/j.issn.1000-0569.2007.09.004
    [48]
    Li Y S, Zhang B L, Gong F Y, et al. Genesis of the giant Kangjiawan lead-zinc ore deposit in Hunan Province: Evidences from fluid inclusion, H–O and S isotope. Acta Petrologica Sinica, 2021, 37 (6): 1847–1866. (in Chinese) doi: 10.18654/1000-0569/2021.06.13
    [49]
    Wang Y B, Liu D Y, Meng Y F, et al. SHRIMP U–Pb geochronology of the Xinqiao Cu–S–Fe–Au deposit in the Tongling ore district, Anhui. Chinese Geology, 2004, 31 (2): 169–173. (in Chinese) doi: 10.3969/j.issn.1000-3657.2004.02.008
    [50]
    Bodnar R J. Revised equation and table for determining the freezing-point depression of H2O–NaCl solutions. Geochimica et Cosmochimica Acta, 1993, 57 (3): 683–684. doi: 10.1016/0016-7037(93)90378-a
    [51]
    Ramboz C, Pichavant M, Weisbrod A. Fluid immiscibility in natural processes: Use and misuse of fluid inclusion data. 2. Interpretation of fluid inclusion data in terms of immiscibility. Chemical Geology, 1982, 37: 29–48. doi: 10.1016/0009-2541(82)90065-1
    [52]
    Wang D, Zheng Y, Yang W, et al. Geology, mineralogy, fluid inclusion, and H–O–S–Pb isotope constraints on ore genesis of the Keyue Sb–Pb–Zn–Ag deposit in Southern Tibet. Geofluids, 2018, 2018: 3175423. doi: 10.1155/2018/3175423
    [53]
    Wang Z G, Wang K Y, Wan D, et al. Genesis of the Huanggoushan Pb–Zn–Au polymetallic deposit in southern Jilin Province, NE China: Constraints from fluid inclusions and C–H–O–S–Pb isotope systematics. Geological Journal, 2020, 55 (4): 3112–3138. doi: 10.1002/gj.3586
    [54]
    Hanilçi N, Öztürk H, Banks D, et al. Geological, geochemical and microthermometric characteristics of the Hakkari region Zn–Pb deposits, SE Turkey. Ore Geology Reviews, 2020, 125: 103667. doi: 10.1016/j.oregeorev.2020.103667
    [55]
    Siani M G, Mehrabi B, Nazarian M, et al. Geology and genesis of the Chomalu polymetallic deposit, NW Iran. Ore Geology Reviews, 2022, 143: 104763. doi: 10.1016/j.oregeorev.2022.104763
    [56]
    Huang C, Du G, Jiang H, et al. Ore-forming fluids characteristics and metallogenesis of the Anjing Hitam Pb–Zn deposit in Northern Sumatra, Indonesia. Journal of Earth Science, 2019, 30 (1): 131–141. doi: 10.1007/s12583-019-0859-z
    [57]
    Yang J, Yang X, Yang C, et al. Genesis of the Talate Pb–Zn (–Fe) deposit in the Altay, Xinjiang, NW China: Evidence from fluid inclusions and stable isotopes. Ore Geology Reviews, 2022, 144: 104864. doi: 10.1016/j.oregeorev.2022.104864
    [58]
    Xu J, Xie Y, Yang Z, et al. Trace elements in fluid inclusions of submarine exhalation-sedimentation system in Tongling metallogenic province. Mineral Deposits, 2004, 23 (3): 344–352. (in Chinese) doi: 10.3969/j.issn.0258-7106.2004.03.008
    [59]
    Zhou T F, Zhang L J, Yuan F, et al. LA-ICP-MS in situ trace element analysis of pyrite from the Xinqiao Cu–Au–S deposit in Tongling, Anhui, and its constraints on the ore genesis. Earth Science Frontiers, 2010, 17 (2): 306–319. (in Chinese)
    [60]
    Xu G, Zhou J. The Xinqiao Cu–S–Fe–Au deposit in the Tongling mineral district, China: Synorogenic remobilization of a stratiform sulfide deposit. Ore Geology Reviews, 2001, 18: 77–94. doi: 10.1016/s0169-1368(01)00017-8
    [61]
    Xiao X, Gu L, Ni P, et al. Study on fluids of SEDEX massive sulfide deposits in Tongling district, Anhui Province. Mineral Deposits, 2002, 21 (Suppl.): 491–494. (in Chinese)
    [62]
    Xu W Y, Yang Z S, Meng Y F, et al. Genetic model and dynamic migration of ore-forming fluids in carboniferous exhalation-sedimentary massive sulfide deposits of Tongling district, Anhui Province. Mineral Deposits, 2004, 23 (3): 353–364. doi: 10.3969/j.issn.0258-7106.2004.03.009
    [63]
    Jiang S Y, Ding Q F, Yang S Y, et al. Discovery and significance of carbonate mud mounds from Cu-polymetallic deposits in the Middle and Lower Yangtze metallogenic belt: Examples from the Wushan and Dongguashan deposits. Acta Geologica Sinica, 2011, 85 (5): 744–756. (in Chinese)
    [64]
    Mahmoodi P, Rastad E, Rajabi A, et al. Genetic model for Jurassic shale-hosted Zn–Pb deposits of the Arak Mining District, Malayer-Esfahan metallogenic belt: Insight from sedimentological, textural, and stable isotope characteristics. Ore Geology Reviews, 2021, 136: 104262. doi: 10.1016/j.oregeorev.2021.104262
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