Lithostructural controls in Douala-Buea Region landscape (SW Cameroon margin): Insights from morphometric analysis

Ateba, Christian Balla; Owona, Sébastien; Ngapna, Moussa Nsangou; Tsimi, Véronique Manga; Minyem, Dieudonné; Ondoa, Joseph Mvondo

doi:10.1007/s11629-020-6085-4

Cited by 10 publications

(6 citation statements)

References 64 publications

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“…These drainage systems match with the impermeable crystallophyllian basement, high rate of fracturation, and tectonic instabilities, notably tiltings, uplifts, or subsidences. This drainage network reveals the preeminence of tectonic activities than lithological variations that have controlled the WCHM and corroborates previous results on the Southern Cameroon margin (Figures 1e, 6 and 7; Balla Ateba et al, 2021; Nsangou Ngapna et al, 2013, 2018, 2019).…”

Section: Discussionsupporting

confidence: 91%

“…The different mounts and the plains of Tombel, Mbô, Ndop, Noun, and Tikar that separate them define the CVL a horsts and grabens morphology. Similar studies have been demonstrated by Nsangou Ngapna et al (2018, 2019, 2020) and Balla Ateba et al (2021) in the south‐western Cameroonian Atlantic coastal region.…”

Section: Geological Frameworksupporting

confidence: 87%

“…46.2%) tilted basins and that of the whole WHCM (ca. 84.7%) linkable to above structures in the South Cameroon margin (Balla Ateba et al, 2021; Nsangou Ngapna et al, 2019, 2020); and also across the world (e.g., Jaberi et al, 2018; Pérez‐Peña, Azor, Azanon, & Keller, 2010). T ‐index meanwhile indicates the deviation of the trunk river from the midline of the basin or lateral tilting (Ribolini, 2000).…”

Section: Discussionmentioning

confidence: 99%

“…Keller and Pinter (2002), Kirby and Whipple (2012), Mathew et al (2016), Menier et al (2017), Ramkumar, Menier, Mathew, Santosh, and Siddiqui (2017) and Ramkumar et al (2019) in several worldwide margins, Nsangou Ngapna et al (2018, 2019, 2020) and Balla Ateba et al (2021) in the South Cameroon margin within the West African passive margin evidenced tectonic activities on their landscape using geomorphometric indices. The critical evaluation of the WCHM geomorphological setting shows it is an uneven geomorphic unit developed on Palaeo‐ and Neoproterozoic basement and the Cretaceous to Recent volcano‐sedimentary cover and dissected by regional active tectonic structures such as the CCSZ, BTJ, MNSZ, TBF, Foumban‐Bankim Shear Zone (FSZ), SF, and the CVL.…”

Section: Discussionmentioning

confidence: 99%

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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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Section: Discussionsupporting

confidence: 91%

Section: Geological Frameworksupporting

confidence: 87%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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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 Hi does not directly relate to active tectonics, and its values are affected by rock resistance as well as tectonic influences [68,122,127]. Low values of Hi (<0.45) are typical of highly eroded basins with low tectonic activity; intermediate values of Hi (0.45 < Hi < 0.55) are associated with basins with moderate erosion and an already developed dissection; finally, high values of Hi (>0.55) represent 'young' weakly eroded basins dominated by linear incision and initial dissection, resulting from a recent tectonic activity [6,54,122,128,129].…”

Section: Sub-basins-derived Indexesmentioning

confidence: 99%

Morphoneotectonics of the Abruzzo Periadriatic Area (Central Italy): Morphometric Analysis and Morphological Evidence of Tectonics Features

2021

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Drainage basin-scale morphometric analysis and morphological evidence of tectonics represent helpful tools to evaluate and investigate morphoneotectonic processes in tectonically active regions. In this perspective, we applied an integrated analysis to the Abruzzo Periadriatic Area, between the Tronto and Sinello rivers (Central Italy). It involved morphometric analysis, structural geomorphological field mapping, and detailed analysis of fluvial terraces. Geomorphic indexes and markers (e.g., Irta, SL index, ksn, and knickpoints) were used in this study to detect the response of landscapes to drainage systems’ unsteadiness and tectonic deformation processes, possibly induced by the ongoing activity of the buried tectonic structures. Furthermore, the investigation of morphological field evidence of tectonics, integrated with the analysis of fluvial terraces’ spatial and temporal arrangement, was performed to assign relative, geomorphologically-based, age constraints of the landscape evolution. The resulting data allowed us to define domains affected by different morphostructural and morphoneotectonic processes, related to the impact and ongoing activity of the five detected families of structural elements (S1, F1, F2, F3, and F4), mainly characterized by compressive, extensional, and transtensive kinematics. Finally, this study could represent a scientific basis for integrating morphometric, fluvial, and tectonic geomorphology analysis to better define the main phases of the landscape evolution and the impact of morphoneotectonic processes on fluvial environments in uplifting piedmont areas.

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Post-orogenic transients and relict landforms of the Bafoussam - Mamfe region (West-Cameroon Highland margin)

et al. 2022

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Lithostructural controls in Douala-Buea Region landscape (SW Cameroon margin): Insights from morphometric analysis

Cited by 10 publications

References 64 publications

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

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

Morphoneotectonics of the Abruzzo Periadriatic Area (Central Italy): Morphometric Analysis and Morphological Evidence of Tectonics Features

Post-orogenic transients and relict landforms of the Bafoussam - Mamfe region (West-Cameroon Highland margin)

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