Analysis of Diagenetic Impacts on Foraminifera by X‐Rays Techniques

This research studies the effects of diagenesis on foraminifera, particularly its influence on the identification of internal embryonic chambers through advanced imaging methods. Diagenetic processes can compromise the structural integrity of foraminifera, making their accurate characterization more difficult. To investigate this, microCT imaging was utilized alongside a calcite standard to quantify calcium content, while microXRF analysis provided understanding into the presence of additional minerals and trace elements. Additionally, XRD was employed to estimate the mineral composition of the surrounding rock matrix, providing context for understanding the diagenetic processes affecting the foraminifera. Samples were obtained from depths of 21, 25, 31, and 39 m within the Pirabas Formation. The findings indicate that specimens from 25 and 39 m depths exhibited more pronounced diagenetic alteration, with notable degradation of structural details. Elevated Fe and Mn concentrations at 25 m suggest significant diagenetic modifications affecting both internal and external structures. The integration of microCT, microXRF, and XRD techniques enabled a detailed characterization of the foraminifera and their surrounding environment, offering valuable insights into the geochemical factors influencing their preservation and alteration within the Pirabas Formation. This study highlights the impact of diagenesis on foraminiferal preservation and demonstrates the effectiveness of combining these advanced analytical techniques for paleoenvironmental reconstructions.