NDLI: Sequence stratigraphy and depositional environments of Middle-Late Miocene sediments in the eastern part of the Coastal Swamp depobelt, Niger Delta Basin, Nigeria

Content Provider	Springer Nature Link
Author	Mode, Ayonma Wilfred
Copyright Year	2015
Abstract	Detailed studies on depositional sequence, genetic facies, and depositional environment were done using sequence stratigraphic tool in the paralic sequence of Middle to Late Miocene age in the Coastal Swamp depobelt of the Niger Delta Basin. This was aimed at increasing the resolution for prediction of reservoir, seal, and source rocks in the eastern part of the basin. Integration of well logs and biofacies data with paleobathymetric control allowed regional correlation of major transgressive-regressive events between wells, resulting in the generation of a sequence stratigraphic framework and environment of deposition (EOD). Dominant genetic facies include the following: marine shale, lower shoreface, upper shoreface, channel sands, and channel heterolithics. Three major stacking patterns were delineated and interpreted as Lowstand Systems Tract (LST), Highstand Systems Tract (HST), and Trangressive Systems Tract (TST). Correlation reveals ten major stratigraphic bounding surfaces of various ages (five sequence boundaries and five maximum flooding surfaces) and four depositional sequences. Stratigraphic flattening of events at various ages indicates a shift of the depositional center from north to south, aligning with the progradational pattern of deposition of the Niger Delta. The stratal package also thickens towards the south (basinwards). Generated paleobathymetric maps show generally that sediments were deposited within neritic through bathyal environments at different times. The EOD spans through incised canyons, channels, inner- mid shelf, shelf margin, and slope margin. A combination of the reservoir sands of the LST and HST and the shale units of the TST offers good stratigraphic traps for hydrocarbons and hence should be targeted during exploration.
Starting Page	9815
Ending Page	9827
Page Count	13
File Format	PDF
ISSN	18667511
Journal	Arabian Journal of Geosciences
Volume Number	8
Issue Number	11
e-ISSN	18667538
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-03-13
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Sequence stratigraphy Systems tract Genetic facies Environment of deposition (EOD) Earth Sciences
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Environmental Science

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