Petrographic and Geochemical Study of the Yandingui-Yangba Massif (Bafia, Central Cameroon): Geodynamic Implications

Rose Noël Noël; Victor Metang; Zenon Itiga; Danielle Christiane Ananga Olomo; Lucien Paul Bamagalena; Boris Tchouta Toyi; Lucie Jenny Eyimi; Berthol Manfo Yemkeu

doi:doi:10.11648/j.earth.20251403.11

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Petrographic and Geochemical Study of the Yandingui-Yangba Massif (Bafia, Central Cameroon): Geodynamic Implications

Rose Noël Noël

, Victor Metang^*

, Zenon Itiga

, Danielle Christiane Ananga Olomo

, Lucien Paul Bamagalena

, Boris Tchouta Toyi

, Lucie Jenny Eyimi

, Berthol Manfo Yemkeu

Published in Earth Sciences (Volume 14, Issue 3)

Received: 30 March 2025 Accepted: 15 April 2025 Published: 9 May 2025

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Abstract

Several diverse models and hypotheses have been proposed to understand the dynamics of the Central African Pan-African Belt. The lack of agreement among these proposals suggests that it would be better to continue large scale mapping to provide answers to this regional issue. In this perspective, the NE-SW oriented Yandingui-Yangba rock massif, located about thirty kilometers north of Bafia, and intrudes a Precambrian metamorphic basement. The petrographic study of the massif reveals two lithological units: the metamorphic unit, which includes orthogneiss and amphibolite enclaves, and the intrusive magmatic unit, composed of amphibole-biotite granites. Geochemically, the rocks of Yandingui-Yangba (67.85 < SiO₂ < 71.06) are metaluminous I-type granites (A/CNK < 1.1), associated with the shoshonitic series and of magnesian nature (0.67 < FeOt/(MgO + FeOt) < 0.78). Mantle-normalized trace element spectra show a subparallel pattern between the granites and orthogneiss, indicating a common origin. These rocks were emplaced in a volcanic arc setting in a subduction-collision context. The presence of positive anomalies in U, K, Pb, and Zr, and negative anomalies in Th, Nb, and Ti, is characteristic of crustal-derived rocks. The magma that generated these granites resulted from the partial melting of metagreywackes in the lower crust, as evidenced by the low concentrations of Ni and Cr. This melting was likely facilitated by heat influx from mantle-derived magma during the Pan-African orogeny.

Published in	Earth Sciences (Volume 14, Issue 3)
DOI	10.11648/j.earth.20251403.11
Page(s)	93-104
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2025. Published by Science Publishing Group

Keywords

Granites, Orthogneiss, Enclave, Shoshonitic, I-Type, Pan-African, Yandingui-Yangba

References

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Noël, R. N., Metang, V., Itiga, Z., Olomo, D. C. A., Bamagalena, L. P., et al. (2025). Petrographic and Geochemical Study of the Yandingui-Yangba Massif (Bafia, Central Cameroon): Geodynamic Implications. Earth Sciences, 14(3), 93-104. https://doi.org/10.11648/j.earth.20251403.11

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Noël, R. N.; Metang, V.; Itiga, Z.; Olomo, D. C. A.; Bamagalena, L. P., et al. Petrographic and Geochemical Study of the Yandingui-Yangba Massif (Bafia, Central Cameroon): Geodynamic Implications. Earth Sci. 2025, 14(3), 93-104. doi: 10.11648/j.earth.20251403.11

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Noël RN, Metang V, Itiga Z, Olomo DCA, Bamagalena LP, et al. Petrographic and Geochemical Study of the Yandingui-Yangba Massif (Bafia, Central Cameroon): Geodynamic Implications. Earth Sci. 2025;14(3):93-104. doi: 10.11648/j.earth.20251403.11

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@article{10.11648/j.earth.20251403.11,
  author = {Rose Noël Noël and Victor Metang and Zenon Itiga and Danielle Christiane Ananga Olomo and Lucien Paul Bamagalena and Boris Tchouta Toyi and Lucie Jenny Eyimi and Berthol Manfo Yemkeu},
  title = {Petrographic and Geochemical Study of the Yandingui-Yangba Massif (Bafia, Central Cameroon): Geodynamic Implications
},
  journal = {Earth Sciences},
  volume = {14},
  number = {3},
  pages = {93-104},
  doi = {10.11648/j.earth.20251403.11},
  url = {https://doi.org/10.11648/j.earth.20251403.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.earth.20251403.11},
  abstract = {Several diverse models and hypotheses have been proposed to understand the dynamics of the Central African Pan-African Belt. The lack of agreement among these proposals suggests that it would be better to continue large scale mapping to provide answers to this regional issue. In this perspective, the NE-SW oriented Yandingui-Yangba rock massif, located about thirty kilometers north of Bafia, and intrudes a Precambrian metamorphic basement. The petrographic study of the massif reveals two lithological units: the metamorphic unit, which includes orthogneiss and amphibolite enclaves, and the intrusive magmatic unit, composed of amphibole-biotite granites. Geochemically, the rocks of Yandingui-Yangba (67.85 2 < 71.06) are metaluminous I-type granites (A/CNK < 1.1), associated with the shoshonitic series and of magnesian nature (0.67 < FeOt/(MgO + FeOt) < 0.78). Mantle-normalized trace element spectra show a subparallel pattern between the granites and orthogneiss, indicating a common origin. These rocks were emplaced in a volcanic arc setting in a subduction-collision context. The presence of positive anomalies in U, K, Pb, and Zr, and negative anomalies in Th, Nb, and Ti, is characteristic of crustal-derived rocks. The magma that generated these granites resulted from the partial melting of metagreywackes in the lower crust, as evidenced by the low concentrations of Ni and Cr. This melting was likely facilitated by heat influx from mantle-derived magma during the Pan-African orogeny.
},
 year = {2025}
}

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TY  - JOUR
T1  - Petrographic and Geochemical Study of the Yandingui-Yangba Massif (Bafia, Central Cameroon): Geodynamic Implications

AU  - Rose Noël Noël
AU  - Victor Metang
AU  - Zenon Itiga
AU  - Danielle Christiane Ananga Olomo
AU  - Lucien Paul Bamagalena
AU  - Boris Tchouta Toyi
AU  - Lucie Jenny Eyimi
AU  - Berthol Manfo Yemkeu
Y1  - 2025/05/09
PY  - 2025
N1  - https://doi.org/10.11648/j.earth.20251403.11
DO  - 10.11648/j.earth.20251403.11
T2  - Earth Sciences
JF  - Earth Sciences
JO  - Earth Sciences
SP  - 93
EP  - 104
PB  - Science Publishing Group
SN  - 2328-5982
UR  - https://doi.org/10.11648/j.earth.20251403.11
AB  - Several diverse models and hypotheses have been proposed to understand the dynamics of the Central African Pan-African Belt. The lack of agreement among these proposals suggests that it would be better to continue large scale mapping to provide answers to this regional issue. In this perspective, the NE-SW oriented Yandingui-Yangba rock massif, located about thirty kilometers north of Bafia, and intrudes a Precambrian metamorphic basement. The petrographic study of the massif reveals two lithological units: the metamorphic unit, which includes orthogneiss and amphibolite enclaves, and the intrusive magmatic unit, composed of amphibole-biotite granites. Geochemically, the rocks of Yandingui-Yangba (67.85 2 < 71.06) are metaluminous I-type granites (A/CNK < 1.1), associated with the shoshonitic series and of magnesian nature (0.67 < FeOt/(MgO + FeOt) < 0.78). Mantle-normalized trace element spectra show a subparallel pattern between the granites and orthogneiss, indicating a common origin. These rocks were emplaced in a volcanic arc setting in a subduction-collision context. The presence of positive anomalies in U, K, Pb, and Zr, and negative anomalies in Th, Nb, and Ti, is characteristic of crustal-derived rocks. The magma that generated these granites resulted from the partial melting of metagreywackes in the lower crust, as evidenced by the low concentrations of Ni and Cr. This melting was likely facilitated by heat influx from mantle-derived magma during the Pan-African orogeny.

VL  - 14
IS  - 3
ER  -

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Rose Noël Noël

Department of Earth Sciences, Faculty of Science, University of Yaounde I, Yaounde, Cameroon

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http://orcid.org/0009-0006-3981-4505
Victor Metang

Department of Earth Sciences, Faculty of Science, University of Yaounde I, Yaounde, Cameroon

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http://orcid.org/0000-0001-5483-1618
Zenon Itiga

Department of Earth Sciences, Faculty of Science, University of Douala, Douala, Cameroon

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http://orcid.org/0009-0006-9353-1258
Danielle Christiane Ananga Olomo

Department of Earth Sciences, Faculty of Science, University of Yaounde I, Yaounde, Cameroon

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http://orcid.org/0009-0005-9789-9490
Lucien Paul Bamagalena

Department of Earth Sciences, Faculty of Science, University of Yaounde I, Yaounde, Cameroon

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http://orcid.org/0009-0002-4963-4269
Boris Tchouta Toyi

Department of Earth Sciences, Faculty of Science, University of Yaounde I, Yaounde, Cameroon

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http://orcid.org/0009-0006-1240-6958
Lucie Jenny Eyimi

Department of Earth Sciences, Faculty of Science, University of Yaounde I, Yaounde, Cameroon

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http://orcid.org/0009-0005-3137-4712
Berthol Manfo Yemkeu

Department of Earth Sciences, Faculty of Science, University of Yaounde I, Yaounde, Cameroon

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http://orcid.org/0009-0008-2725-9481

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Noël, R. N., Metang, V., Itiga, Z., Olomo, D. C. A., Bamagalena, L. P., et al. (2025). Petrographic and Geochemical Study of the Yandingui-Yangba Massif (Bafia, Central Cameroon): Geodynamic Implications. Earth Sciences, 14(3), 93-104. https://doi.org/10.11648/j.earth.20251403.11

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Noël, R. N.; Metang, V.; Itiga, Z.; Olomo, D. C. A.; Bamagalena, L. P., et al. Petrographic and Geochemical Study of the Yandingui-Yangba Massif (Bafia, Central Cameroon): Geodynamic Implications. Earth Sci. 2025, 14(3), 93-104. doi: 10.11648/j.earth.20251403.11

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AMA Style

Noël RN, Metang V, Itiga Z, Olomo DCA, Bamagalena LP, et al. Petrographic and Geochemical Study of the Yandingui-Yangba Massif (Bafia, Central Cameroon): Geodynamic Implications. Earth Sci. 2025;14(3):93-104. doi: 10.11648/j.earth.20251403.11

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@article{10.11648/j.earth.20251403.11,
  author = {Rose Noël Noël and Victor Metang and Zenon Itiga and Danielle Christiane Ananga Olomo and Lucien Paul Bamagalena and Boris Tchouta Toyi and Lucie Jenny Eyimi and Berthol Manfo Yemkeu},
  title = {Petrographic and Geochemical Study of the Yandingui-Yangba Massif (Bafia, Central Cameroon): Geodynamic Implications
},
  journal = {Earth Sciences},
  volume = {14},
  number = {3},
  pages = {93-104},
  doi = {10.11648/j.earth.20251403.11},
  url = {https://doi.org/10.11648/j.earth.20251403.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.earth.20251403.11},
  abstract = {Several diverse models and hypotheses have been proposed to understand the dynamics of the Central African Pan-African Belt. The lack of agreement among these proposals suggests that it would be better to continue large scale mapping to provide answers to this regional issue. In this perspective, the NE-SW oriented Yandingui-Yangba rock massif, located about thirty kilometers north of Bafia, and intrudes a Precambrian metamorphic basement. The petrographic study of the massif reveals two lithological units: the metamorphic unit, which includes orthogneiss and amphibolite enclaves, and the intrusive magmatic unit, composed of amphibole-biotite granites. Geochemically, the rocks of Yandingui-Yangba (67.85 2 < 71.06) are metaluminous I-type granites (A/CNK < 1.1), associated with the shoshonitic series and of magnesian nature (0.67 < FeOt/(MgO + FeOt) < 0.78). Mantle-normalized trace element spectra show a subparallel pattern between the granites and orthogneiss, indicating a common origin. These rocks were emplaced in a volcanic arc setting in a subduction-collision context. The presence of positive anomalies in U, K, Pb, and Zr, and negative anomalies in Th, Nb, and Ti, is characteristic of crustal-derived rocks. The magma that generated these granites resulted from the partial melting of metagreywackes in the lower crust, as evidenced by the low concentrations of Ni and Cr. This melting was likely facilitated by heat influx from mantle-derived magma during the Pan-African orogeny.
},
 year = {2025}
}

Copy | Download

TY  - JOUR
T1  - Petrographic and Geochemical Study of the Yandingui-Yangba Massif (Bafia, Central Cameroon): Geodynamic Implications

AU  - Rose Noël Noël
AU  - Victor Metang
AU  - Zenon Itiga
AU  - Danielle Christiane Ananga Olomo
AU  - Lucien Paul Bamagalena
AU  - Boris Tchouta Toyi
AU  - Lucie Jenny Eyimi
AU  - Berthol Manfo Yemkeu
Y1  - 2025/05/09
PY  - 2025
N1  - https://doi.org/10.11648/j.earth.20251403.11
DO  - 10.11648/j.earth.20251403.11
T2  - Earth Sciences
JF  - Earth Sciences
JO  - Earth Sciences
SP  - 93
EP  - 104
PB  - Science Publishing Group
SN  - 2328-5982
UR  - https://doi.org/10.11648/j.earth.20251403.11
AB  - Several diverse models and hypotheses have been proposed to understand the dynamics of the Central African Pan-African Belt. The lack of agreement among these proposals suggests that it would be better to continue large scale mapping to provide answers to this regional issue. In this perspective, the NE-SW oriented Yandingui-Yangba rock massif, located about thirty kilometers north of Bafia, and intrudes a Precambrian metamorphic basement. The petrographic study of the massif reveals two lithological units: the metamorphic unit, which includes orthogneiss and amphibolite enclaves, and the intrusive magmatic unit, composed of amphibole-biotite granites. Geochemically, the rocks of Yandingui-Yangba (67.85 2 < 71.06) are metaluminous I-type granites (A/CNK < 1.1), associated with the shoshonitic series and of magnesian nature (0.67 < FeOt/(MgO + FeOt) < 0.78). Mantle-normalized trace element spectra show a subparallel pattern between the granites and orthogneiss, indicating a common origin. These rocks were emplaced in a volcanic arc setting in a subduction-collision context. The presence of positive anomalies in U, K, Pb, and Zr, and negative anomalies in Th, Nb, and Ti, is characteristic of crustal-derived rocks. The magma that generated these granites resulted from the partial melting of metagreywackes in the lower crust, as evidenced by the low concentrations of Ni and Cr. This melting was likely facilitated by heat influx from mantle-derived magma during the Pan-African orogeny.

VL  - 14
IS  - 3
ER  -

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