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Late Devonian Mn mineralization as a result of volcanism- and orbital-forced palaeoceanographic changes.

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Title: Late Devonian Mn mineralization as a result of volcanism- and orbital-forced palaeoceanographic changes.
Authors: Zhao, Yinqiang1,2 (AUTHOR), Yang, Chenchen1,3 (AUTHOR), Xu, Hai1,4 (AUTHOR), Jiang, Sha5 (AUTHOR), Zhou, Shangguo5 (AUTHOR), Zhang, Qizuan6 (AUTHOR), Yin, Runsheng1 (AUTHOR) yinrunsheng@mail.gyig.ac.cn
Source: SCIENCE CHINA Earth Sciences. May2026, Vol. 69 Issue 5, p1872-1882. 11p.
Subject Terms: *Volcanism, *Paleoceanography, *Manganese ores, *Devonian Period, *Radiative forcing, *Ore deposits, *Milankovitch cycles, *Mass extinctions
Geographic Terms: China
Abstract: Sedimentary Mn carbonate deposits (SMCDs) constitute the dominant global reservoir of Mn, a critical metal essential for modern technologies, yet their formation timing and links to environmental perturbations remain elusive owing to sparse datable minerals and coarse chronostratigraphic resolution. Here, we report astronomical cycle signals preserved in P (indicative of marine productivity) and (Zr+K)/Al (indicative of detrital flux and relative sea level) from drill core ZK2407 of the Xialei SMCD (∼143 Mt Mn), South China, which is embedded in Late Devonian platform/slope facies strata of the Youjiang Basin. Leveraging the 405 kyr eccentricity cycle and conodont biostratigraphy, the astronomical timescale for the Xialei SMCD was established. The deposition of ore layers I and II+III in the Xialei SMCD took ∼130 and ∼550 kyr, respectively. Ore layer I aligns precisely with the Late Famennian Annulata Event (∼363.4 Ma), while ore layer II+III coincides with the Dasberg Event (∼361.9 Ma). As both mass extinctions were volcanically driven, these temporal couplings suggest large volcanic eruptions as the primary forcing for Mn metallogeny. Massive CO2 emissions from large volcanism induced global warming and sea-level rise, fostering redox-stratified oceanic conditions conducive to SMCD formation. Mn concentrations covary positively in-phase with P and sea-level, indicating transgression-mediated co-transport of anoxic deep-sea hydrothermal Mn(II) and nutrients to the oxic shallow sea, where Mn(III/IV) oxides precipitated. The resulting heightened productivity drove organic matter burial, which subsequently facilitated the reductive transformation of these oxides into Mn carbonates during early diagenesis. Orbital forcing modulated the rhythm of Mn enrichment on astronomical timescales by periodically driving paleoenvironmental variations. This work delineates a temporal framework for the formation of SMCDs and demonstrates that the metallogeny of SMCDs resulted from paleoceanographic changes induced by large volcanism and orbital dynamics. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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  Data: Late Devonian Mn mineralization as a result of volcanism- and orbital-forced palaeoceanographic changes.
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  Data: <searchLink fieldCode="AR" term="%22Zhao%2C+Yinqiang%22">Zhao, Yinqiang</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+Chenchen%22">Yang, Chenchen</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xu%2C+Hai%22">Xu, Hai</searchLink><relatesTo>1,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jiang%2C+Sha%22">Jiang, Sha</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhou%2C+Shangguo%22">Zhou, Shangguo</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Qizuan%22">Zhang, Qizuan</searchLink><relatesTo>6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yin%2C+Runsheng%22">Yin, Runsheng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> yinrunsheng@mail.gyig.ac.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22SCIENCE+CHINA+Earth+Sciences%22">SCIENCE CHINA Earth Sciences</searchLink>. May2026, Vol. 69 Issue 5, p1872-1882. 11p.
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  Data: *<searchLink fieldCode="DE" term="%22Volcanism%22">Volcanism</searchLink><br />*<searchLink fieldCode="DE" term="%22Paleoceanography%22">Paleoceanography</searchLink><br />*<searchLink fieldCode="DE" term="%22Manganese+ores%22">Manganese ores</searchLink><br />*<searchLink fieldCode="DE" term="%22Devonian+Period%22">Devonian Period</searchLink><br />*<searchLink fieldCode="DE" term="%22Radiative+forcing%22">Radiative forcing</searchLink><br />*<searchLink fieldCode="DE" term="%22Ore+deposits%22">Ore deposits</searchLink><br />*<searchLink fieldCode="DE" term="%22Milankovitch+cycles%22">Milankovitch cycles</searchLink><br />*<searchLink fieldCode="DE" term="%22Mass+extinctions%22">Mass extinctions</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22China%22">China</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Sedimentary Mn carbonate deposits (SMCDs) constitute the dominant global reservoir of Mn, a critical metal essential for modern technologies, yet their formation timing and links to environmental perturbations remain elusive owing to sparse datable minerals and coarse chronostratigraphic resolution. Here, we report astronomical cycle signals preserved in P (indicative of marine productivity) and (Zr+K)/Al (indicative of detrital flux and relative sea level) from drill core ZK2407 of the Xialei SMCD (∼143 Mt Mn), South China, which is embedded in Late Devonian platform/slope facies strata of the Youjiang Basin. Leveraging the 405 kyr eccentricity cycle and conodont biostratigraphy, the astronomical timescale for the Xialei SMCD was established. The deposition of ore layers I and II+III in the Xialei SMCD took ∼130 and ∼550 kyr, respectively. Ore layer I aligns precisely with the Late Famennian Annulata Event (∼363.4 Ma), while ore layer II+III coincides with the Dasberg Event (∼361.9 Ma). As both mass extinctions were volcanically driven, these temporal couplings suggest large volcanic eruptions as the primary forcing for Mn metallogeny. Massive CO2 emissions from large volcanism induced global warming and sea-level rise, fostering redox-stratified oceanic conditions conducive to SMCD formation. Mn concentrations covary positively in-phase with P and sea-level, indicating transgression-mediated co-transport of anoxic deep-sea hydrothermal Mn(II) and nutrients to the oxic shallow sea, where Mn(III/IV) oxides precipitated. The resulting heightened productivity drove organic matter burial, which subsequently facilitated the reductive transformation of these oxides into Mn carbonates during early diagenesis. Orbital forcing modulated the rhythm of Mn enrichment on astronomical timescales by periodically driving paleoenvironmental variations. This work delineates a temporal framework for the formation of SMCDs and demonstrates that the metallogeny of SMCDs resulted from paleoceanographic changes induced by large volcanism and orbital dynamics. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1007/s11430-025-1854-0
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 11
        StartPage: 1872
    Subjects:
      – SubjectFull: Volcanism
        Type: general
      – SubjectFull: Paleoceanography
        Type: general
      – SubjectFull: Manganese ores
        Type: general
      – SubjectFull: Devonian Period
        Type: general
      – SubjectFull: Radiative forcing
        Type: general
      – SubjectFull: Ore deposits
        Type: general
      – SubjectFull: Milankovitch cycles
        Type: general
      – SubjectFull: Mass extinctions
        Type: general
      – SubjectFull: China
        Type: general
    Titles:
      – TitleFull: Late Devonian Mn mineralization as a result of volcanism- and orbital-forced palaeoceanographic changes.
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            NameFull: Zhao, Yinqiang
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            NameFull: Yang, Chenchen
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            NameFull: Xu, Hai
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            NameFull: Jiang, Sha
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            NameFull: Zhou, Shangguo
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            NameFull: Zhang, Qizuan
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            NameFull: Yin, Runsheng
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            – D: 01
              M: 05
              Text: May2026
              Type: published
              Y: 2026
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            – Type: issn-print
              Value: 16747313
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              Value: 69
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            – TitleFull: SCIENCE CHINA Earth Sciences
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