Striations at The Base of The Paleo-Fan and Channel Revealed by 3D Seismic Data, Offshore Cameroon

Le, Anh Ngoc

doi:10.17014/ijog.8.1.101-107

Cited by 4 publications

(4 citation statements)

References 15 publications

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“…2). In this area, gas hydrate and submarine fans have been documented in the Pliocene and Pleistocene sequences (Le et al 2015;Le, 2021b). The evolution of the submarine channel and fan shows the controls of Kribi High in the southeast.…”

Section: Regional Geologymentioning

confidence: 89%

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Evolution of Deep-Water Sinuous Channel Offshore Cameroon, West Africa, Using 3D Seismic Data

2021

IGJ

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Using newly acquired 3D seismic data, the deep-water sinuous channel has been discovered in the Miocene sequence on the continental margin of Cameroon, West Africa. The investigation is using high-resolution 3D seismic data, covering an area of 1500 km2, with the water depth ranging from 400 m - 2000 m. Two submarine channel systems have been documented in the northern part of the study area, the offset stacked channel and North-Northeast – Southwest channel. The offset stacked channel dimension is about 3 km wide, c. 20 km long and c. 500 ms TWT thick, extending from east to west. The evolution of this channel can be divided into three stages based on the changes in channel scale, geometry, and fill type. In the initial stage, the channel is characterized as symmetry ‘U’ shaped, bidirectional onlap, high amplitude reflections, inferring to high energy flow and sand-prone channel fill. In the following stages, the channel reduced the size and flow energy. North-Northeast – Southwest channel developed at the end of the Miocene. It is c. 3 km wide, 20 km long, 50 ms TWT thick, indicating a new sediment source for the study area. At the end of the Miocene, both channel systems show a high sinuously as an indicator of low energy flows. Uplift in the Late Miocene possibly leads to the compacted channel complex which is appeared in the anticline form, giving a great hydrocarbon trap potential for the study area.

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Section: Regional Geologymentioning

confidence: 89%

“…The evolution of the submarine channel and fan shows the controls of Kribi High in the southeast. The development of intensive striation at the base of the submarine fan was interpreted for the high sedimentation rate in Pliocene time (Le, 2021b). In Miocene, the basin is a fully marine environment.…”

Section: Regional Geologymentioning

confidence: 99%

Evolution of Deep-Water Sinuous Channel Offshore Cameroon, West Africa, Using 3D Seismic Data

2021

IGJ

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“…In the more proximal settings (i.e., east of Kribi-Campo High), there are multiple submarine incisions of several kilometres wide and some amalgamated cut-and-fill submarine channel complexes downslope and parallel to present-day shelf-break for most of the Paleocene section (Wornardt, 1999;Le, 2012;Iboum et al, 2016). The late Eocene-early Oligocene tectonic event facilitated a relative sea-level fall, responsible for the widespread erosion and non-deposition in the deep-water of Douala Basin (Wornardt, 1999;Helm, 2009;Mvondo, 2010;Iboum et al, 2016;Ngo et al, 2018;Le, 2021) (Fig. 2).…”

Section: Geological Settingmentioning

confidence: 99%

“…Insert map on the left-hand corner of the map shows the location of Cameroon inthe Gulf of Guinea. The 3D block, which we studied is outlined in red box, while the red cirles with black outlines labelled P1 and P2, represent well locations (Modified fromLe et al, 2014;Loule et al, 2018;Le, 2021).…”

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confidence: 99%

Seismic Geomorphology of a Late Cretaceous Turbidite Channel system in Deepwater Kribi/Campo sub-basin, offshore Cameroon

GOUOTT¹,

Yem²,

Atangana³

et al. 2022

Preprint

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In this study, a seismic reflection dataset and well-log data were integrated to investigate the geometry and internal configuration of a turbidite channel system within the Late Cretaceous interval of the deep-water Kribi-Campo sub-basin, offshore Cameroon. This interval is characterized by a well-developed submarine channel system consisting of an early and a late-stage channel. Morphologically, the submarine channel system has a northeast-southwest trend and is U-shaped in cross-section with a length of 56 km within the study area. The early-stage channel has a relatively straight morphology and varies in width and depth from 3 to 5 km and 89 to 197 m, respectively. However, the late stage of the channel is characterized by a narrower (1 to 3 km) and shallower (41 to 103 m) incision, with sinuous morphology carved into the early channel infill. The changing interaction of differential tectonic subsidence, relative sea level, source sediment supply and slope gradient change are considered to be the major control on the geometry and internal characteristics of the submarine channel system. Sag subsidence during the Campanian led to basin deepening and the widespread development of basinal sediments as submarine fans and promotion of submarine channel system development. The filling of the channel system occurred during a long-term Maastrichtian relative sea level rise, punctuated by falls in relative sea level. Sand appears to have been fed to the channel system by the palaeo-Sanaga and palaeo-Nyong Rivers, with sand rich aprons developed were these rivers debouched into the study area. The early stage of the submarine channel is dominated by coarse-grained sediments in the southwest and fine-grained sediments in the northeast, while the late-stage channel is mainly filled with fine-grained sediments. The presence of coarse-grained sediments occur within the submarine channel axis downstream represents a potential for hydrocarbon reservoirs with enhanced petrophysical qualities due to a low depositional gradient. The geomorphological analysis of this ancient submarine channel system along the western African margin, as presented in this study, has broad implications in the understanding of the distribution of deep-water sediments with potential for hydrocarbon exploration in the region.

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Seismic geomorphology of a Late Cretaceous submarine channel system in the Kribi/Campo sub-basin, offshore Cameroon

Gouott

Yem

Atangana

et al. 2022

Marine and Petroleum Geology

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Striations at The Base of The Paleo-Fan and Channel Revealed by 3D Seismic Data, Offshore Cameroon

Cited by 4 publications

References 15 publications

Evolution of Deep-Water Sinuous Channel Offshore Cameroon, West Africa, Using 3D Seismic Data

Evolution of Deep-Water Sinuous Channel Offshore Cameroon, West Africa, Using 3D Seismic Data

Seismic Geomorphology of a Late Cretaceous Turbidite Channel system in Deepwater Kribi/Campo sub-basin, offshore Cameroon

Seismic geomorphology of a Late Cretaceous submarine channel system in the Kribi/Campo sub-basin, offshore Cameroon

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