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<p>Parts of the Cretaceous period were characterized by widespread wildfire activity. Wildfire evidence can serve as a proxy for paleoclimatic conditions. Charcoal and pyrolyzed polycyclic aromatic hydrocarbons preserved in sedimentary records are widely recognized as reliable proxies for wildfire activity, offering insights into the nature of wildfires. This study employed a multi-method approach, integrating polycyclic aromatic hydrocarbons analysis, temperature estimation equations for peat combustion, and microscopic images. This methodology was applied to the No. 6 coal from the Shengli Coalfield, Inner Mongolia, China. Results indicate that wildfire temperatures during peat accumulation in the Erlian Basin ranged from approximately 300 to 600 °C. Carbonized fossil assemblages from the Aptian–Albian are globally dominated by ferns and gymnosperms, with angiosperms occurring only rarely.</p>

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Peat wildfires during the Early Cretaceous Aptian–Albian of the Erlian Basin in Inner Mongolia, China

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年12月2日

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  • Yan Gao,
  • Tim A. Moore,
  • Jingjing Liu,
  • Shifeng Dai

摘要

Parts of the Cretaceous period were characterized by widespread wildfire activity. Wildfire evidence can serve as a proxy for paleoclimatic conditions. Charcoal and pyrolyzed polycyclic aromatic hydrocarbons preserved in sedimentary records are widely recognized as reliable proxies for wildfire activity, offering insights into the nature of wildfires. This study employed a multi-method approach, integrating polycyclic aromatic hydrocarbons analysis, temperature estimation equations for peat combustion, and microscopic images. This methodology was applied to the No. 6 coal from the Shengli Coalfield, Inner Mongolia, China. Results indicate that wildfire temperatures during peat accumulation in the Erlian Basin ranged from approximately 300 to 600 °C. Carbonized fossil assemblages from the Aptian–Albian are globally dominated by ferns and gymnosperms, with angiosperms occurring only rarely.