IJInn 2018 Volume 8 Issue 1
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Victoria Okereke, & Ndubuisi Ukpabi. (2018). Palynology and Palynofacies studies of fifteen shallow borehole samples from some parts of Delta and Bayelsa states, Niger Delta, Southern NIGERIA. International Journal of Innovation (ijinn) ISSN:0975 – 9808, 8(1), 1–11. http://doi.org/10.5281/zenodo.2494291
Palynology and Palynofacies studies of fifteen shallow borehole samples from some parts of Delta and Bayelsa states, Niger Delta, Southern NIGERIA
Authors & Affiliation:
Victoria Okereke, Ndubuisi Ukpabi
Geology Department, University of Port Harcourt, Rivers State. NIGERIA
Rock Samples from fifteen shallow boreholes in some parts of Delta and Bayelsa states, Southern Nigeria was analysed for Palynology and Palynofacies studies to determine their paleoecology/paleoenvironment of deposition. The sample intervals range from 0.0 - 0.5m in depth and was drilled using hand auger. The samples were described and prepared into palynological slides following the non-acid sodium hexa metaphosphate method. The analysis of the palynological preparations yielded abundant pollen, spore, fungal spores, dinoflagellates and fresh water algae. Particulate organic matter was also recovered from the palynological preparations for palynofacies analysis. The particulate organic matter included opaque and translucent phytoclast, amourphous organic matter and palynomorphs. The palynological recoveries from the samples were presented in species total recovery charts and cumulative percentage distribution charts, while the particulate organic matter, making up the palynofacies were presented in percentage distribution table. The palynological recoveries provided data for biozonation of the studied area into A – D biozones. The study area is part of the Benin Formation and ranged in geologic age between Miocene to Recent. This is indicated with the occurrence of marker (index fossils) species such as Echitricolporites spinosus, Pachydermites diederixi, Stereisporites sp, Striatricolpites catatumbus, Crassoretitriletes vanraadshooveni, Monoporites annulatus and Nympheapollis clarus. The palynofacies data generated indicated that the biozones identified was the results of paleo ecological changes between mangrove swamp, tropical rain forest to fresh water swamp.
Key words: Palynology; palynofacies; palynomorphs; biozonation; paleoenvironment.