Structure of the lithosphere beneath Cameroon using global gravity model data: implications for the setting of the Cameroon Volcanic Line

Fantah, Cyrille Armel Cheunteu; Kamga, Alain Pierre Tokam; Mouzong, Marcelin Pemi; Nouayou, Robert; Nguiya, Severin

doi:10.1007/s11600-023-01106-4

Artykuł - szczegóły

Tytuł artykułu

Structure of the lithosphere beneath Cameroon using global gravity model data: implications for the setting of the Cameroon Volcanic Line

Autorzy

Fantah Cyrille Armel Cheunteu , Kamga Alain Pierre Tokam , Mouzong Marcelin Pemi , Nouayou Robert , Nguiya Severin

Wybrane pełne teksty z tego czasopisma

https://www.springer.com/journal/11600

Identyfikatory

DOI

10.1007/s11600-023-01106-4

Warianty tytułu

Języki publikacji

Abstrakty

In this study, XGM2019e_2159 global gravitational model data are used to investigate the intracrustal structure beneath Cameroon. The work focuses on the mantle region that promoted the formation of the Cameroon Volcanic Line (CVL) and above all, appreciates the geodynamic interaction between these two particular geological entities. The approach is based on the use of digital filters for qualitative and quantitative interpretations. The data were first processed using the upward continuation filter that reveals several zones of gravity gradients, which are persistent at various depths and that can be interpreted as the vertical extension of major geological feature limits. The (2D) analysis of the frequency spectrum of the global gravity model anomalies (XGM2019e_2159) was performed to estimate the crustal thickness of the aligned volcanic regions located in Cameroon and Congo Craton (CC). The use of 2D1/2 modelling applied on 5 profiles reveals the lateral and vertical extension of the discordance of geological structures. The presence of a mafic layer with thicknesses ranging between 6 and 22 km is persistent beneath the Kribi-Campo area, the Congo Craton and the Pan-African chain. Models also suggest a crustal thinning process at the northern border of Congo Craton which may have provoked the sliding of some fragments of the crust in the Pan-African domain migrating towards the CVL. The results obtained also reveal the identity of a complex and multi-fractured tectonic context and that the CVL and the CC are not only of mantle origin but also have a mantle interconnection.

Słowa kluczowe

gravity Pan-African chain geodynamic modelling Cameroon Volcanic Line Congo Craton

grawitacja łańcuch panafrykański geodynamika modelowanie

Wydawca

Instytut Geofizyki PAN
Springer

Czasopismo

Acta Geophysica

Rocznik

2024

Tom

Vol. 72, no. 2

Strony

689--710

Opis fizyczny

Bibliogr. 99 poz.

Twórcy

autor

Fantah Cyrille Armel Cheunteu

cheunteu91cfa@gmail.com

Laboratory of Geophysics and Geoexploration, Department of Physics, The University of Yaoundé I, P.O. Box 812, Yaoundé, Cameroon

https://orcid.org/0000-0003-4860-9707

autor

Kamga Alain Pierre Tokam

Laboratory of Energy, Materials, Modeling and Method, National Higher Polytechnic School of Douala, University of Douala, Douala, Cameroon

autor

Mouzong Marcelin Pemi

Technology and Applied Sciences Laboratory, University Institute of Technology, University of Douala, P.O. Box 8698, Douala, Cameroon

autor

Nouayou Robert

Laboratory of Geophysics and Geoexploration, Department of Physics, The University of Yaoundé I, P.O. Box 812, Yaoundé, Cameroon

autor

Nguiya Severin

Laboratory of Energy, Materials, Modeling and Method, National Higher Polytechnic School of Douala, University of Douala, Douala, Cameroon

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