Regional geology and geophysics of the eastern Gulf of Guinea (Niger Delta to Rio Muni)

Lawrence, Steve; Munday, Stuart; Bray, Richard J.

doi:10.1190/1.1523752

Cited by 130 publications

(78 citation statements)

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“…On the equatorial West African margin, this event may correspond to a discrete phase of deformation that has the form of in situ folding of the platform sedimentary section and the inversion of the original rift-related roll-over structures (Lawrence et al, 2002). This has resulted in reducing accommodation space and decline of sedimentation rate in the equatorial Africa margin compared to the SW margin as demonstrated by (Seranne and Anka., 2005).…”

Section: Discussionmentioning

confidence: 95%

“…Previous workers (Daly et al, 1989;Seranne andAnka., 2005, Manga, 2008;Djomeni et al, 2011) demonstrated this relationships between relative sea level change and tectonic by linking the evolution of the Douala sub-basin to the Santonian tectonics and Eocene sliding (Teisserenc and Villemin, 1989;Lawrence et al, 2002;Seranne and Anka., 2005). Robertson (1992) stated that equatorial portion of the South Atlantic continued to experience rapid extension during Early Paleocene and surrounding basins in this area undergo rapid subsidence.…”

Section: Depositional Evolution and Tectonicmentioning

confidence: 98%

“…The proximity of the Benue Trough added to the proximity of the Cameroon Volcanic Line complicate the tectonic history of the Douala sub-basin and then their development probably had a significant impact on sedimentation patterns (Lawrence, Munday & Bray, 2002;Manga, 2008;Djomeni et al, 2011). The tectono-stratigraphic history of the Douala sub-basin includes several episodes of tectonic activity, which can be grouped in two great stages: (1) in the first stage (top Early Cretaceous-upper Oligocene), basin development and sedimentation is related primarily to rift associated tectonics.…”

Section: Geological Settings and Previous Researchmentioning

confidence: 99%

“…The tectono-stratigraphic history of the Douala sub-basin includes several episodes of tectonic activity, which can be grouped in two great stages: (1) in the first stage (top Early Cretaceous-upper Oligocene), basin development and sedimentation is related primarily to rift associated tectonics. This first stage can be divided in two phases of burial (late Aptian -Turonian and Senonian-Eocene) and two erosive phases (Senonian unconformity and mid-Eocene to base Miocene); (2) in the second stage (upper Oligocene -Recent), basin development and sedimentation were related primarily to the development of the Cameroon Volcanic Line, particularly the development of the Oligocene to Recent volcanoes (ECL, 2001;Lawrence et al, 2002). Figure 2.…”

Section: Geological Settings and Previous Researchmentioning

confidence: 99%

“…Figure 2. Tectono-lithostratigraphy of the Douala sub-basin (compiled from Nguene, Tamfu, Loule & Ngassa (1992), Lawrence et al (2002) and Brownfield and Charpentier (2006))…”

Section: Geological Settings and Previous Researchmentioning

confidence: 99%

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Facies Analysis and Sequence Stratigraphy of Missole Outcrops: N’Kapa Formation of the South-Eastern Edge of Douala Sub-Basin (Cameroon)

Kwetche

Ntamak-Nida

Nitcheu

et al. 2017

ESR

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Missole facies description and sequence stratigraphy analysis allow a new proposal of depositional environments of the Douala sub-basin eastern part. The sediments of Missole outcrops (N'kapa Formation) correspond to fluvial/tidal channel to shallow shelf deposits with in some place embayment deposits within a warm and semi-arid climate. Integrated sedimentologic, palynologic and mineralogical data document a comprehensive sequence stratigraphy of this part of the Douala sub-basin. Five facies associations occur: (1) facies association I is characterized by Floodplain deposits; (2) facies association II is Fluvial to mouth bar deposits; (3) facies association III characterise Shallow Shelf deposits; (4) facies association IV represents Distal bay or Lacustrine déposits; and (5) Facies association V is made of Fluvial channel deposits. Six depositional sequences were identified. These sequences are composed of four progradational sequences and two retrogradational sequences containing a fluvial channel portion represented by lag deposits at the base of retrogradational sequences. These deposits represent the outset of the relative sea level rise period. In the study area, the N'kapa Formation is composed of non-marine/coastal aggradational deposits representing the early stage of the regressive period. The occurrence of the estuarine/bay deposits with paleosols development is interpreted as evidence of climate change with significant relative base level fluctuation. The study of key minerals associated to sequence stratigraphy as well as palynology demonstrated that sequence architecture has been controlled mostly by climate evolution and outcrops are dated Paleocene -early Eocene.

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Section: Discussionmentioning

confidence: 95%

Section: Depositional Evolution and Tectonicmentioning

confidence: 98%

Section: Geological Settings and Previous Researchmentioning

confidence: 99%

Section: Geological Settings and Previous Researchmentioning

confidence: 99%

“…Figure 2. Tectono-lithostratigraphy of the Douala sub-basin (compiled from Nguene, Tamfu, Loule & Ngassa (1992), Lawrence et al (2002) and Brownfield and Charpentier (2006))…”

Section: Geological Settings and Previous Researchmentioning

confidence: 99%

See 3 more Smart Citations

Facies Analysis and Sequence Stratigraphy of Missole Outcrops: N’Kapa Formation of the South-Eastern Edge of Douala Sub-Basin (Cameroon)

Kwetche

Ntamak-Nida

Nitcheu

et al. 2017

ESR

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Evolution of the Edea‐Eseka geomorphic units: A 'natural laboratory' of a prototype active rifting cross‐cutting the Southern Cameroon (West African) passive margin

et al. 2019

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The SW Cameroonian passive margin, a part of the Cameroon Low-Plateau, presents several topographic levels cross-cut by the Sanaga Fault (SF), Benue Triple Junction and Cameroon Volcanic Line (CVL), three pre-and syn-rift tectonic features that are still active. This study carried out on the Edea-Eseka Region (EER) a portion of this margin (3 30 0 -4 N, 10 -10 55 0 E) aims to constrain the relationships between these features and the development of the morphology. Geomorphic indices, combined with field observations and supported by literature data show that the interactive activity of these structures constitutes the main force that controls the EER morphology. From West to East, EER consists of three morphotectonic units: the Coastal, Intermediate and Upper units. The Coastal unit built on the Douala-Kribi/Campo Basin (<65 Ma) and assigned to the Aptian South Atlantic rifting, exhibits low reliefs deeply incised. The Intermediate and Upper units are developed on the Nyong and Oubanguide crystallophyllian complexes during the Eburnean/Trans-Amazonian (2,400-1,750 Ma) and Pan-African (650-540 Ma) orogenies, respectively. The Intermediate unit with moderate reliefs registers a strong differential erosion, whilst the Upper unit records high-reliefs. Geomorphic indices, tectonic and recent seismic data reveal that the EER has been rejuvenated, experienced uplifts and tiltings synchronously with the main active phases of these features. The timing and magnitude of these activities vary from one unit to another. The morphotectonic model is consistent to the crucial tectonic phases: emplacement of SF (Palaeozoic), the breakup of Gondwana and erection of CVL (Cretaceous).

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The Western Cameroon Highland margin: Is there any geomorphometric evidence of active tectonics?

et al. 2022

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The Western Cameroon Highland margin (WCHM) within the West African margin displays an uneven high relief. Its evolutionary model in vogue suggests the tectonic activity of the Cameroon Volcanic Line (CVL). An evident question in this regard is whether there is any geomorphometric evidence in support of what is this widespread view? We evaluate this question using field controls and geomorphometric indices of active tectonics derived for 13 main river basins with the help of digital elevation model (DEM)‐30 m data. The WCHM is developed on Proterozoic granite‐gneissic basement and the Cretaceous to Recent volcano‐sedimentary cover and was affected by regional active tectonic features. It is marked by transient signs of different landscape evolutionary stages recorded by the relief and drainage network; shown by gradual adjustment of rivers to equilibrium stages; and cautioned by a greatest variation of DEM‐based geomorphic indices. These indices, hypsometric integral (HI = 0.10–0.35), topography relief (TR = 595–2,710), topography dissection (TD = 114–829), valley floor width to valley height ratio (Vf arg = 0.61–14.91), transverse topographic symmetric factor (T‐index = 0.18–0.49), and basin asymmetric factor (AF = 1.08–24.37) highlight elevated and roughness character of that margin, from the Benue Trough and culminating to the CVL. River longitudinal profiles reveal variably and deeply incised WCHM by the drainage network, reinforced by ongoing tectonic activities. Knickpoints (Kps), stream length‐gradient (SL), uplift (U = 1.17–2.0), and a variety of normalized steepness (Ksn = 11.63–635.16) evidence the diversity and preeminent tectonic controls. The above results show that the WCHM is widely considered to be the consequence of the mantle dynamisms and regional tectonics since Proterozoic, the CVL activities, and the erosional processes.

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Regional geology and geophysics of the eastern Gulf of Guinea (Niger Delta to Rio Muni)

Cited by 130 publications

References 0 publications

Facies Analysis and Sequence Stratigraphy of Missole Outcrops: N’Kapa Formation of the South-Eastern Edge of Douala Sub-Basin (Cameroon)

Facies Analysis and Sequence Stratigraphy of Missole Outcrops: N’Kapa Formation of the South-Eastern Edge of Douala Sub-Basin (Cameroon)

Evolution of the Edea‐Eseka geomorphic units: A 'natural laboratory' of a prototype active rifting cross‐cutting the Southern Cameroon (West African) passive margin

The Western Cameroon Highland margin: Is there any geomorphometric evidence of active tectonics?

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