Pakistan Journal of Geology (PJG)

Journal: Pakistan Journal of Geology (PJG)
Author: Didei Innocent Sunday and Oki A. Austin

This is an open access journal distributed under the Creative Commons Attribution License CC BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/pjg.01.2025.20.25

Provenance study of an outcropping unit of the Owelli Sandstone in Anambra basin, Southern Nigeria was carried out. The outcrop was mapped and logged, A total of four unconsolidated samples were collected from the formation that were impregnated with blue epoxy resin before cutting. Each of the samples were prepared following the techniques employed in thin section analysis. Point counting techniques was employed to quantify the various mineral grains. 200 points were counted for each slide that was viewed under the petrographic microscope. The heavy mineral assemblages which includes garnet, epitode and staurolite suggested medium-grade metamorphic source rock whereas tourmaline, rutile and zircon indicates recycled sedimentary source, igneous and metamorphic source rock. More so, the Owelli sandstone is said to be mature. This deduction arises from the average value obtained from ZTR index data which is in the average range of 67%. The study therefore, indicates that the Owelli sandstone are derived from recycled sedimentary rocks that comes from the Abakaliki uplift in the Benue Trough and the metamorphic and plutonic rocks of the Oban Massif Basement Complex.