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Gold and silver deportment in sulfide ores – A case study of the Freiberg epithermal Ag-Pb-Zn district, Germany.

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Title: Gold and silver deportment in sulfide ores – A case study of the Freiberg epithermal Ag-Pb-Zn district, Germany.
Authors: Swinkels, Laura J.1,2 (AUTHOR) l.swinkels@hzdr.de, Burisch, Mathias1,2 (AUTHOR), Rossberg, Constantin M.1 (AUTHOR), Oelze, Marcus3 (AUTHOR), Gutzmer, Jens2 (AUTHOR), Frenzel, Max2 (AUTHOR)
Source: Minerals Engineering. Dec2021, Vol. 174, pN.PAG-N.PAG. 1p.
Subjects: Laser ablation inductively coupled plasma mass spectrometry, Gold ores, Silver sulfide, Sulfide ores, Precious metals, Electron probe microanalysis, Gold, Arsenopyrite
Abstract: • Au and Ag deportment in an intermediate sulfidation Ag-Pb-Zn system. • Deportment calculation using quantitative mineralogy, bulk and mineral chemistry. • Deportments are highly variable between samples due to mineralogical contrast. • Gold in the Freiberg district is primarily hosted by arsenopyrite and electrum. • Silver in the Freiberg district is primarily hosted by sulfosalts and fahlore. Deportment data is essential for the planning of mining and minerals processing operations. This need is particularly tangible for deposits of noble metals, such as gold and silver. Therefore, the current paucity of published gold and silver deportment data for individual ore deposits and districts – and the concomitant lack of understanding how this relates to salient geological and mineralogical features of these deposits – is surprising. In the present study, we apply a combination of bulk geochemistry, laser ablation-inductively coupled plasma-mass spectrometry, electron microprobe analysis, and mineral liberation analysis to gold- and silver-rich samples from the epithermal Freiberg Ag-Pb-Zn district, to investigate variability in gold and silver deportments, as well as the corresponding geological/mineralogical controls. The results show that the main carriers of gold are electrum and arsenopyrite, whereas silver is mostly hosted by Ag-sulfosalts (pyrargyrite, miargyrite, polybasite) and fahlore (freibergite). Deportments vary greatly between samples. These variations can be related to the relative abundances of different minerals within the samples, which in turn reflect their spatio-temporal position within the district. Comparisons with other epithermal Ag-Pb-Zn districts similar to Freiberg indicate that the results presented here are of general significance. [ABSTRACT FROM AUTHOR]
Copyright of Minerals Engineering is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
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  Data: Gold and silver deportment in sulfide ores – A case study of the Freiberg epithermal Ag-Pb-Zn district, Germany.
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  Data: <searchLink fieldCode="JN" term="%22Minerals+Engineering%22">Minerals Engineering</searchLink>. Dec2021, Vol. 174, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Laser+ablation+inductively+coupled+plasma+mass+spectrometry%22">Laser ablation inductively coupled plasma mass spectrometry</searchLink><br /><searchLink fieldCode="DE" term="%22Gold+ores%22">Gold ores</searchLink><br /><searchLink fieldCode="DE" term="%22Silver+sulfide%22">Silver sulfide</searchLink><br /><searchLink fieldCode="DE" term="%22Sulfide+ores%22">Sulfide ores</searchLink><br /><searchLink fieldCode="DE" term="%22Precious+metals%22">Precious metals</searchLink><br /><searchLink fieldCode="DE" term="%22Electron+probe+microanalysis%22">Electron probe microanalysis</searchLink><br /><searchLink fieldCode="DE" term="%22Gold%22">Gold</searchLink><br /><searchLink fieldCode="DE" term="%22Arsenopyrite%22">Arsenopyrite</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: • Au and Ag deportment in an intermediate sulfidation Ag-Pb-Zn system. • Deportment calculation using quantitative mineralogy, bulk and mineral chemistry. • Deportments are highly variable between samples due to mineralogical contrast. • Gold in the Freiberg district is primarily hosted by arsenopyrite and electrum. • Silver in the Freiberg district is primarily hosted by sulfosalts and fahlore. Deportment data is essential for the planning of mining and minerals processing operations. This need is particularly tangible for deposits of noble metals, such as gold and silver. Therefore, the current paucity of published gold and silver deportment data for individual ore deposits and districts – and the concomitant lack of understanding how this relates to salient geological and mineralogical features of these deposits – is surprising. In the present study, we apply a combination of bulk geochemistry, laser ablation-inductively coupled plasma-mass spectrometry, electron microprobe analysis, and mineral liberation analysis to gold- and silver-rich samples from the epithermal Freiberg Ag-Pb-Zn district, to investigate variability in gold and silver deportments, as well as the corresponding geological/mineralogical controls. The results show that the main carriers of gold are electrum and arsenopyrite, whereas silver is mostly hosted by Ag-sulfosalts (pyrargyrite, miargyrite, polybasite) and fahlore (freibergite). Deportments vary greatly between samples. These variations can be related to the relative abundances of different minerals within the samples, which in turn reflect their spatio-temporal position within the district. Comparisons with other epithermal Ag-Pb-Zn districts similar to Freiberg indicate that the results presented here are of general significance. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Minerals Engineering is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.mineng.2021.107235
    Languages:
      – Code: eng
        Text: English
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        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Laser ablation inductively coupled plasma mass spectrometry
        Type: general
      – SubjectFull: Gold ores
        Type: general
      – SubjectFull: Silver sulfide
        Type: general
      – SubjectFull: Sulfide ores
        Type: general
      – SubjectFull: Precious metals
        Type: general
      – SubjectFull: Electron probe microanalysis
        Type: general
      – SubjectFull: Gold
        Type: general
      – SubjectFull: Arsenopyrite
        Type: general
    Titles:
      – TitleFull: Gold and silver deportment in sulfide ores – A case study of the Freiberg epithermal Ag-Pb-Zn district, Germany.
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            NameFull: Swinkels, Laura J.
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            NameFull: Burisch, Mathias
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            NameFull: Rossberg, Constantin M.
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            NameFull: Oelze, Marcus
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          Dates:
            – D: 01
              M: 12
              Text: Dec2021
              Type: published
              Y: 2021
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              Value: 174
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            – TitleFull: Minerals Engineering
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