Petrographic and geochemical characteristics of Cretaceous formations of Nkara region and surrounding area (Kwilu province, DRC)

Petrographic and geochemical characteristics of Cretaceous formations of Nkara region and surrounding area (Kwilu province, DRC)

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Geological investigations in the Nkara region of Kwilu Province, DR Congo, have identified seven lithofacies: click here pudding, argillite, quartz arenite, feldspathic arenite, greywackes, micaceous arenite, and soft finegrained quartz arenite.This study presents the petrographic and geochemical compositions and paleo-environmental conditions for the first time.Chemical analyses show slight variations in SiO2, Al2O3, and Fe2O3, linked to mineral composition.The quartz grains indicate extensive transport under strong hydrodynamic conditions, and iron oxides suggest deposition in an oxidizing environment, highlighting the need nitrile gloves in a bucket for further geological research in the area.