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Fluid transport and reaction during disseminated mineralization in orogenic gold systems.

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Title: Fluid transport and reaction during disseminated mineralization in orogenic gold systems.
Authors: Zhang, Peng-Cong1,2 haochengyugeo@qq.com, Yu, Hao-Cheng1,3, Smeraglia, Luca4,5, Gao, Yong-Bao6, Li, Chao7, Fu, Jia-Nan1, Bai, Zhao-Hua6, Wang, Rui8, Qiu, Kun-Feng1 kunfengqiu@qq.com
Source: Geological Society of America Bulletin. Sep/Oct2026, Vol. 138 Issue 9/10, p4057-4072. 16p.
Subject Terms: *Mineralization, *Reactive flow, *Deformations (Mechanics), *Geochemical modeling, *Pore fluids
Geographic Terms: Qinling Mountains (China), China
Abstract: Disseminated mineralization is responsible for much of the production from orogenic gold deposits, and deciphering the nature of reactive fluid flow across the macro- to microscopic scale is crucial for understanding the mineralization processes. We integrated structural analysis, microstructural observations, whole-rock geochemistry, and thermodynamic modeling at the Liba orogenic gold deposit in the West Qinling orogen, central China, aiming to unravel the behavior of fluid in slate-hosted disseminated mineralization. The presence of deformed slaty foliation and hydrothermal sericite S-C fabrics indicates that the east-west-striking orebodies are hosted within sinistral brittle-ductile shear zones, which act as deposit-scale fluid migration conduits. The spatial distribution of pyrite within the mineralized slates closely aligns with pore networks and grain boundaries, suggesting that grain-scale enhanced permeability and fluid flow during mineralization were primarily accommodated by microcracking along grain boundaries. Combined with whole-rock geochemical data and thermodynamic modeling, we reveal that under conditions where rock permeability is sufficient for fluid transport, gold mineralization efficiency depends on the degree of reaction between the reactive fluid and Fe-bearing minerals. Compared to siliceous slate, the higher abundance of Fe-bearing minerals in argillaceous slate enhances reactivity at the fluid-mineral interface, promoting sulfide formation and gold precipitation. This study demonstrates that the physicochemical interplay between structural deformation and geochemical reactivity fundamentally controls disseminated mineralization in slate-hosted orogenic gold systems. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Header DbId: enr
DbLabel: Energy & Power Source
An: 197246235
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Fluid transport and reaction during disseminated mineralization in orogenic gold systems.
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  Data: <searchLink fieldCode="AR" term="%22Zhang%2C+Peng-Cong%22">Zhang, Peng-Cong</searchLink><relatesTo>1,2</relatesTo><i> haochengyugeo@qq.com</i><br /><searchLink fieldCode="AR" term="%22Yu%2C+Hao-Cheng%22">Yu, Hao-Cheng</searchLink><relatesTo>1,3</relatesTo><br /><searchLink fieldCode="AR" term="%22Smeraglia%2C+Luca%22">Smeraglia, Luca</searchLink><relatesTo>4,5</relatesTo><br /><searchLink fieldCode="AR" term="%22Gao%2C+Yong-Bao%22">Gao, Yong-Bao</searchLink><relatesTo>6</relatesTo><br /><searchLink fieldCode="AR" term="%22Li%2C+Chao%22">Li, Chao</searchLink><relatesTo>7</relatesTo><br /><searchLink fieldCode="AR" term="%22Fu%2C+Jia-Nan%22">Fu, Jia-Nan</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Bai%2C+Zhao-Hua%22">Bai, Zhao-Hua</searchLink><relatesTo>6</relatesTo><br /><searchLink fieldCode="AR" term="%22Wang%2C+Rui%22">Wang, Rui</searchLink><relatesTo>8</relatesTo><br /><searchLink fieldCode="AR" term="%22Qiu%2C+Kun-Feng%22">Qiu, Kun-Feng</searchLink><relatesTo>1</relatesTo><i> kunfengqiu@qq.com</i>
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  Data: <searchLink fieldCode="JN" term="%22Geological+Society+of+America+Bulletin%22">Geological Society of America Bulletin</searchLink>. Sep/Oct2026, Vol. 138 Issue 9/10, p4057-4072. 16p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Mineralization%22">Mineralization</searchLink><br />*<searchLink fieldCode="DE" term="%22Reactive+flow%22">Reactive flow</searchLink><br />*<searchLink fieldCode="DE" term="%22Deformations+%28Mechanics%29%22">Deformations (Mechanics)</searchLink><br />*<searchLink fieldCode="DE" term="%22Geochemical+modeling%22">Geochemical modeling</searchLink><br />*<searchLink fieldCode="DE" term="%22Pore+fluids%22">Pore fluids</searchLink>
– Name: SubjectGeographic
  Label: Geographic Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Qinling+Mountains+%28China%29%22">Qinling Mountains (China)</searchLink><br /><searchLink fieldCode="DE" term="%22China%22">China</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Disseminated mineralization is responsible for much of the production from orogenic gold deposits, and deciphering the nature of reactive fluid flow across the macro- to microscopic scale is crucial for understanding the mineralization processes. We integrated structural analysis, microstructural observations, whole-rock geochemistry, and thermodynamic modeling at the Liba orogenic gold deposit in the West Qinling orogen, central China, aiming to unravel the behavior of fluid in slate-hosted disseminated mineralization. The presence of deformed slaty foliation and hydrothermal sericite S-C fabrics indicates that the east-west-striking orebodies are hosted within sinistral brittle-ductile shear zones, which act as deposit-scale fluid migration conduits. The spatial distribution of pyrite within the mineralized slates closely aligns with pore networks and grain boundaries, suggesting that grain-scale enhanced permeability and fluid flow during mineralization were primarily accommodated by microcracking along grain boundaries. Combined with whole-rock geochemical data and thermodynamic modeling, we reveal that under conditions where rock permeability is sufficient for fluid transport, gold mineralization efficiency depends on the degree of reaction between the reactive fluid and Fe-bearing minerals. Compared to siliceous slate, the higher abundance of Fe-bearing minerals in argillaceous slate enhances reactivity at the fluid-mineral interface, promoting sulfide formation and gold precipitation. This study demonstrates that the physicochemical interplay between structural deformation and geochemical reactivity fundamentally controls disseminated mineralization in slate-hosted orogenic gold systems. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1130/B38735.1
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 16
        StartPage: 4057
    Subjects:
      – SubjectFull: Mineralization
        Type: general
      – SubjectFull: Reactive flow
        Type: general
      – SubjectFull: Deformations (Mechanics)
        Type: general
      – SubjectFull: Geochemical modeling
        Type: general
      – SubjectFull: Pore fluids
        Type: general
      – SubjectFull: Qinling Mountains (China)
        Type: general
      – SubjectFull: China
        Type: general
    Titles:
      – TitleFull: Fluid transport and reaction during disseminated mineralization in orogenic gold systems.
        Type: main
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          Name:
            NameFull: Zhang, Peng-Cong
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            NameFull: Yu, Hao-Cheng
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            NameFull: Smeraglia, Luca
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            NameFull: Gao, Yong-Bao
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            NameFull: Li, Chao
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            NameFull: Fu, Jia-Nan
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            NameFull: Bai, Zhao-Hua
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            NameFull: Wang, Rui
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            NameFull: Qiu, Kun-Feng
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          Dates:
            – D: 01
              M: 09
              Text: Sep/Oct2026
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 00167606
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            – Type: volume
              Value: 138
            – Type: issue
              Value: 9/10
          Titles:
            – TitleFull: Geological Society of America Bulletin
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