Structural characterization of the Pan-African Ndieki area in the Foumban-Bankim Shear Zone (West Cameroon): constraints from field observations and microstructures

Julios, Efon Awoum; Fozing, Eric Martial; Kwékam, Maurice; Jules, Tcheumenak Kouémo; Cliff, Choumele Kana Styve; Ludovic, Achu Megnemo

doi:10.1007/s12517-020-05775-z

Cited by 16 publications

(2 citation statements)

References 41 publications

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“…The D 2 and D 3 phases also facilitate the uplift of mantelic magma and the emplacement of syn‐kinematic plutons along the CCSZ. This syn‐kinematic emplacement is evidenced by numerous structural features, among which are NE–SW trend magmatic foliation and lineation (Efon Awoum et al, 2021; Achu Megnemo et al, 2021; Fozing et al, 2014; Fozing et al, 2021; Tcheumenak Kouémo et al, 2014). These NE–SW structures in granite evidence their emplacement under the control of a NE–SW active shear zone, the FFSZ.…”

Section: Discussionmentioning

confidence: 99%

“…Both phases are associated with N100E and N140E trending stretching mineral lineations, dated between 630 ± 5 Ma and 620 ± 3 Ma in the North‐Cameroon (Toteu et al, 2004, 2006). The D 3 phase, dated between 613 and 585 Ma, has led to sinistral or dextral N–S and NE–SW shear movements and is responsible for the emplacement of CCSZ (Tcheumenak Kouémo et al, 2014; Efon Awoum et al, 2021; Achu Megnemo et al, 2021; Fozing et al, 2014, 2016, 2021). This D 3 phase is well documented in the central and northwestern domains.…”

Section: Geological Setting and Tectonic Frameworkmentioning

confidence: 99%

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Geological mapping and structural interpretation of the Dschang‐Santchou‐escarpment (West, Cameroon), using Landsat 8 OLI/TIRS sensors/SRTM and field observations

et al. 2022

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Geological mapping of the Dschang‐Santchou‐escarpment rocks in the Western Cameroon region was done using a combination of Landsat 8 OLI/TIRS, SRTM images acquired by satellites on January 21, 2021, and field observations. Lineaments were pre‐processing and processing, performed with Envi 5.1. The different methods of digital processing applied, such as the principal component analysis, the coloured compositions and the combination of bands, show a lithological differentiation of the geological formations of the study area. Lineament maps were obtained by applying Sobel directional filters where 496 lineaments were manually extracted. These lineaments display two main trending directions: the NW–SE trend corresponding to the S2 metamorphic foliation direction and the NE–SW trend corresponding to the S3 magmatic foliation direction. The set of these lineaments represents the fracture network in the area. The field observations as well as the lineaments mapping obtained, allowed us to confirm with the help of the fracture network that we are indeed in an escarped environment. Remote sensing data constitute thus a useful tool for geological mapping and structural reconstitutions in the escarped environment.

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Section: Discussionmentioning

confidence: 99%

Section: Geological Setting and Tectonic Frameworkmentioning

confidence: 99%

Geological mapping and structural interpretation of the Dschang‐Santchou‐escarpment (West, Cameroon), using Landsat 8 OLI/TIRS sensors/SRTM and field observations

et al. 2022

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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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Field observations and microstructural evidences of syntectonic emplacement of the Ngwi granitic plutons (central Cameroon domain)

et al. 2021

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Structural characterization of the Pan-African Ndieki area in the Foumban-Bankim Shear Zone (West Cameroon): constraints from field observations and microstructures

Cited by 16 publications

References 41 publications

Geological mapping and structural interpretation of the Dschang‐Santchou‐escarpment (West, Cameroon), using Landsat 8 OLI/TIRS sensors/SRTM and field observations

Geological mapping and structural interpretation of the Dschang‐Santchou‐escarpment (West, Cameroon), using Landsat 8 OLI/TIRS sensors/SRTM and field observations

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

Field observations and microstructural evidences of syntectonic emplacement of the Ngwi granitic plutons (central Cameroon domain)

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