Continental silicification during the Permian chert event: Lacustrine evidence for tectonically controlled silica sources in SW Pangea

2026-06-27

PRE

Jaísa Barbieri de Mello *

Filipe Giovanini Varejão

Mariza Gomes Rodrigues

Beatriz Christofoletti

Lucas Veríssimo Warren

Marcello Guimarães Simões

DOI：10.1016/j.gr.2026.06.005

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• Hydrothermal tectonism drove silicification during the Permian Chert Event. • Continental hydrothermal silica likely contributed to global PCE anomalies. • Breccias linked to Jacutinga Fault record silica-rich fluid circulation. • Silicified fossils and sinters support syndepositional hydrothermal activity. • Tectonic silica influx may relate to Late Permian faunal turnovers.

Continental silicification during the Permian chert event: Lacustrine evidence for tectonically controlled silica sources in SW Pangea

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