Petrography, mineralogy and geochemistry of the chert nodules in the Middle-Late Eocene Pila Spi Formation, High Folded Zone, Northern Iraq

Key Points

• The study characterizes the mineralogy and geochemistry of chert nodules, revealing diverse compositional traits.
• Chert nodules in the Pila Spi Formation contain significant quartz and additional mineral phases shaped by Eocene geological events.
• Assessment of rock samples indicates varying geochemical signatures aligned with depositional environments from the Middle-Late Eocene.
• Findings advance understanding of sedimentary processes and mineral deposits in Northern Iraq's geological history.