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VOL. 7, ISSUE 2 (2022)
Qualitative and Quantitative Signatures of Cenozoic Sediments in YZ-Well Niger Delta Basin NigeriaBasin
Authors
Victoria Okereke, Precious O. Chikezie
Abstract
The qualitative and quantitative signatures of Quaternary sediments
were carried out. Ditch cuttings, intervals 3160-3250 m were analysed to
establish palynozones, age determination, and depositional environments of
sediments. The samples were subjected to standard laboratory processes of
non-acid palynological preparation method. The Lithologic decription of the
samples consists predominantly fine to medium grained sand with shale
intercalations which conformed to the paralic Agbada Formation. The recovery
yielded low to moderate palynomorphs within the sampled intervals. Microscopic
examination yielded moderate to well-preserved palynomorph assemblages
comprising pollen, spores, fungal remains, and dinoflagellate cysts. Maker
species identified include: Zonocostites ramonae, Elaeis guineensis,
Magnastriatites howardi, Cyperaceaepollis sp., and Retibrevitricolporites
protrudens. Quantitative assessment revealed the highest palynomorph
concentrations between 3180–3210m, indicating fluctuations in sedimentation
rates and environmental conditions. Qualitatively, based on the Last Occurrence
Datum (LOD) of Cyperaceaepollis sp and the consistent presence of marker
species Pachydermites diederixi suggests an Aquitanian–Burdigalian Early
Miocene age. Paleoenvironmental analysis revealed a marginal marine to deltaic
setting characterized by alternating terrestrial and marine influences,
supported by the dominance of swamp and mangrove indicators and minor dinocyst
occurrences. The integration of both approaches offers a powerful tool in
reconstructing sedimentary history and refining stratigraphic frameworks in
deltaic systems. This study enhances biostratigraphic resolution, and
underscores the importance of integrating qualitative and quantitative approaches
for stratigraphic framework in the Niger Delta Basin.
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Pages:104-111
How to cite this article:
Victoria Okereke, Precious O. Chikezie "<i>Qualitative and Quantitative Signatures of Cenozoic Sediments in YZ-Well Niger Delta Basin Nigeria</i>Basin". International Journal of Advanced Scientific Research, Vol 7, Issue 2, 2022, Pages 104-111
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