Depositional Facies and Sequence Stratigraphic Study in Parts of Benin Dahomey Basin SW Nigeria: Implications on the Re-Interpretation of Tertiary Sedimentary SuccessionsReportar como inadecuado




Depositional Facies and Sequence Stratigraphic Study in Parts of Benin Dahomey Basin SW Nigeria: Implications on the Re-Interpretation of Tertiary Sedimentary Successions - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Detailed fieldwork in parts of theBenin Dahomey Basin SW, Nigeria has allowed the recognition of sedimentarysuccessions deposited in different continental depositional environmentsinterpreted as fluvial sedimentation characterised by abandoned channels andsubaerial exposure features. The lithofacies recognised are: conglomerates,debris flow deposits, very coarse grained sandstone, ferruginous cross beddedsandstone, siltstone, shale-clay and massive sand. The lithofacies were interpreted in terms of sequencestratigraphic elements with the recognition of sequence boundariescharacterised by distinct facies dislocations and subaerial exposures. Fourdepositional sequences DS I to DS IV were identified. Depositional sequencesDS I exhibited a complete regressive–transgressive cycle comprising LST, TSTand HST, while DS II to DS IV were incomplete comprising of sedimentsinterpreted as LST deposits. On the basis of the depositional facies and sequence stratigraphic elements, thesediments in the area of study are interpreted as predominantly of Ilaro Formation while fewer exposuresare sediments of the Coastal Plain Sands- BeninFormation. This observation suggests a re-interpretation of the Tertiarysedimentary successions, which hitherto recognised all the sediments in thearea of study as Coastal Plain Sands.

KEYWORDS

Depositional Facies, Sequence Stratigraphy, Benin Dahomey Basin, Ilaro Formation, Coastal Plain Sands-Benin Formation

Cite this paper

Olabode, S. and Mohammed, M. 2016 Depositional Facies and Sequence Stratigraphic Study in Parts of Benin Dahomey Basin SW Nigeria: Implications on the Re-Interpretation of Tertiary Sedimentary Successions. International Journal of Geosciences, 7, 210-228. doi: 10.4236-ijg.2016.72017.





Autor: Solomon O. Olabode1, Muraina Z. Mohammed2

Fuente: http://www.scirp.org/



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