Jacqueline Numbem Tchakounté

2026Journal article

Geometry of the Pan-African nappes at the northern margin of the Congo Craton

Victor Metang, Jacqueline Numbem Tchakounté, Rose Noël Ngo Belnoun, Liliane Njips Nantchou Goudjou, Natacha Abigaelle Fosso Simo, Clarisse Rosine Bikaga and 2 more

Journal of African Earth Sciences

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2020Journal article

Geometry and kinematics of brittle deformation in the Central Cameroon Shear Zone (Kékem area): Implication for gold exploration within the Central Africa Fold Belt in Cameroon

De Pesquidoux I. Tchato Tchaptchet, Jacqueline Numbem Tchakounté, Aurélie Kamwa Ngamy, Jean Pierre Tchouankoué, Soumyajit Mukherjee

China Geology

The Central Africa Fold Belt (CAFB) is a collision belt endowed with gold deposits in Eastern Cameroon area mined for about 50 years. However, favorable areas for gold exploration are poorly known. This paper presents (1) the kinematics of the brittle deformation in the Kékem area in the SW portion of the Central Cameroon Shear Zone and (2) constraints gold mineralization events with respect to the collisional evolution of the CAFB. The authors interpret that the conjugate ENE to E and NNW to NW trending lineament corresponds to the synthetic (R) and the antithetic (R’) shears, which accompanied the dextral slip along the NE to ENE striking shear. The latter coincides with the last 570–552 Ma D<sub>3</sub> dextral simple shear-dominated transpression, which is parallel to the Bétaré Oya shear zone hosting gold deposits. Gold mineralizations, which mainly occurred during the last dextral shearing, are disseminated within quartz veins associated to Riedel’s previous structures reactivated due to late collisional activities of the CAFB as brittle deformation. Gold mineralizations occurred mainly during the 570–552 Ma D<sub>3</sub> event. The reactivation, which might be due to dextral simple shear during mylonitzation, plausibly remobilized the early gold deposits hosted in syn-compressional rocks and/or possibly focused deep-sourced fluid mixed with those released by dehydration. Therefore, the Central Cameroon Shear Zone where Kékem is located, and which shows similar petrographical and structural features to those controling Batouri gold district, is a target area for gold exploration in Cameroon.

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2017Journal article

Physico-chemistry and geochemistry of Balengou clay deposit (West Cameroon) with inference to an argillic hydrothermal alteration

Bernard Tassongwa, François Eba, D. Njoya, Jacqueline Numbem Tchakounté, Narcisse Jeudong, Charles Nkoumbou and 1 more

Comptes Rendus Géoscience

Field description and sampling along two pits, granulometry, Atterberg limits, mineralogical (XRD, FTIR, DSC & TGA) and geochemical analyses of the Balengou clays help to determine their characteristics and the genesis of the deposit. The mineralogical composition is comprised of halloysite–kaolinite, quartz, montmorillonite, hematite, anatase, feldspar, zircon, chromite, and apatite. Gibbsite and illite occur at the shallow and deep depth, respectively. Dikes of sand-poor clays contain also cristobalite and tridymite. Pairs of elements Rb–Ba, Rb–Sr, Nb–Ta, Ta–Zr, TiO 2 –Zr display good positive correlations ( R 2 > 0.85). REE patterns are highly fractionated (La N up to 3312, La N /Yb N : 19–10) and are marked by deep Ce and Eu negative anomalies. Immobile element canonical ratios indicate that the protoliths were commendite/pantelerite, rhyolite and dacite, or their plutonic equivalents. Mineralogical and geochemical features lead to the suggestion that the clays derived from an advanced argillic hydrothermal alteration.

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2007Journal article

Evidence of ca 1.6-Ga detrital zircon in the Bafia Group (Cameroon): Implication for the chronostratigraphy of the Pan-African Belt north of the Congo craton

Jacqueline Numbem Tchakounté, S.F. Toteu, W. R. Van Schmus, Joseph Pénaye, Étienne Deloule, Joseph Mvondo Ondoua and 3 more

Comptes Rendus Géoscience

The southern part of the Central African Fold Belt (CAFB) in Cameroon is a southward regional-scale nappe-stacking domain (the Yaoundé Domain). It comprises the Neoproterozoic Yaoundé Group, thrust onto the Congo craton, and the poorly known Bafia Group, which is classically assumed to be a (Palaeoproterozoic) tectonic slice of basement overthrusting the Yaoundé Group to the north. New field observations, zircon U–Pb, and whole-rock and garnet Sm–Nd data allow a better understanding of the Bafia Group within the context of the CAFB. The Bafia Group is probably a Neoproterozoic metasedimentary sequence, comparable to those situated north of the Congo craton (Poli, Lom, and Yaoundé). In addition to the Palaeoproterozoic to Archean source, the detrital zircons in the Bafia Group are inherited from 1617 ± 16 Ma granitoids. Our results also led us to discuss the source and provenance of the Bafia Group's gneiss protoliths, and the metamorphic evolution of this group.

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2004Journal article

The 2.1Ga West Central African Belt in Cameroon: extension and evolution

Joseph Pénaye, S.F. Toteu, Rigobert Tchameni, W. R. Van Schmus, Jacqueline Numbem Tchakounté, Alembert Alexandre Ganwa and 2 more

Journal of African Earth Sciences

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Jacqueline Numbem Tchakounté

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Biography

Publications

2026

Geometry of the Pan-African nappes at the northern margin of the Congo Craton

2021

Petrology and geochemistry of the Pan-African high-K calc-alkaline to shoshonitic–adakitic Bapé plutonic suites (Adamawa-Yade block, Cameroon): evidence of a hot oceanic crust subduction

2020

Geometry and kinematics of brittle deformation in the Central Cameroon Shear Zone (Kékem area): Implication for gold exploration within the Central Africa Fold Belt in Cameroon

2019

CPO and kinematic analysis of the Bitou S-tectonites (Central Cameroon shear zone): AMS and EBSD investigations

Emplacement of the Zindeng phonolitic lava flow (West-Cameroon) in the Cameroon volcanic line: Constraints from the anisotropy of magnetic susceptibility (AMS)

2018

Petrology and geochemistry of the Yoro-Yangben Pan-African granitoid intrusion in the archaean Adamawa-Yade crust (Sw-Bafia, Cameroon)

2017

Physico-chemistry and geochemistry of Balengou clay deposit (West Cameroon) with inference to an argillic hydrothermal alteration

2007

Evidence of ca 1.6-Ga detrital zircon in the Bafia Group (Cameroon): Implication for the chronostratigraphy of the Pan-African Belt north of the Congo craton

2006

U–Pb dating of plutonic rocks involved in the nappe tectonic in southern Cameroon: consequence for the Pan-African orogenic evolution of the central African fold belt

2004

The 2.1Ga West Central African Belt in Cameroon: extension and evolution

Reply to comment by M. Bouyo on “The Adamawa–Yade domain, a piece of Archaean crust in the Neoproterozoic Central African Orogenic belt (Bafia area, Cameroon)”, by Jacqueline Tchakounté et al., Precambrian Research 299 (2017) 210–229

Reply to comment by Ngako and Njonfang on “The Adamawa-Yade domain, a piece of Archaean crust in the Neoproterozoic Central African Orogenic belt (Bafia area, Cameroon)”, by Jacqueline Tchakounté et al., Precambrian Research 299 (2017) 210–229

The Adamawa-Yadé domain, a piece of Archaean crust in the Neoproterozoic Central African Orogenic belt (Bafia area, Cameroon)

Reply to the comment by Mvondo et al. on “U–Pb dating of plutonic rocks involved in the nappe tectonics in southern Cameroon: Consequence for the Pan-African orogenic evolution of the central African fold belt by Toteu et al., 2006” (Journal of African Earth Sciences 44, 479–493)

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