Electrical resistivity imaging and 3D geological modelling of the sedimentary architecture of the Sanaga foodplain (Cameroon, Central Africa)

• Autorzy: Yene Atangana Joseph Quentin , Menanga Tokouet Renaud , Mbida Yem Lionel , Onana Enama Leandre , Ntyame Ella Marie Olivia , Ndjigui Paul-Désiré

Identyfikatory

DOI

10.1007/s11600-022-00945-x

• Języki publikacji: EN

Abstrakty

EN

The sedimentary architecture of the Middle Sanaga deposits in the Central Cameroon Region was studied by combining sedimentological and surface geoelectrical techniques. Lithologic columns from hand augers and pits were correlated to geoelectrical profiles. All of these data were analysed to determine the volumes of lithological units that constitute significant potential geomaterial deposits (gravels, sands, and clays). From surface to depth, geoelectrical results show four main units: conductive GU1 (100 Ωm), semi-resistive GU2 (800 Ωm), resistive UG3 (1000–2000 Ωm), and highly resistive GU4 (over 2000 Ωm). The calibration results identify three lithological units: LU1 composed of poorly sorted pebbles and gravels; LU2 consisting of well-classified medium to coarse sands, asymmetry towards fine to coarse elements; and LU3 consisting of silty clays and clayey sands. Correlation of results assigns UG1 and LU3 to low hydrodynamics, GU2 and LU2 to medium hydrodynamics, and GU3 with LU1 to high hydrodynamics. A 3D filling model has been developed. This model shows that the volume of GU1-LU3 is estimated of 33,549,496 m3 , for GU2-LU2 is estimated of 18,352,728 m³ , and of GU3-LU1 of 7,687,875m3 . This study has important implications for the knowledge and characterization of lithological units, especially geomaterials.

Słowa kluczowe

EN

sedimentary architecture; geomaterials; floodplain; 3D modelling; geoelectrical imaging

PL

architektura sedymentacyjna; geomateriały; równina zalewowa; modelowanie 3D

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2023
• Tom: Vol. 71, no. 2
• Strony: 735--755
• Opis fizyczny: Bibliogr. 78 poz.

Twórcy

autor

Yene Atangana Joseph Quentin

• Department of Earth Sciences, Faculty of Science, University of Yaoundé I, PO box 812, Yaoundé, Cameroon

autor

Menanga Tokouet Renaud

• Department of Earth Sciences, Faculty of Science, University of Yaoundé I, PO box 812, Yaoundé, Cameroon

autor

Mbida Yem Lionel

• Department of Earth Sciences, Faculty of Science, University of Yaoundé I, PO box 812, Yaoundé, Cameroon

autor

Onana Enama Leandre

• Department of Earth Sciences, Faculty of Science, University of Yaoundé I, PO box 812, Yaoundé, Cameroon

autor

Ntyame Ella Marie Olivia

• Department of Earth Sciences, Faculty of Science, University of Yaoundé I, PO box 812, Yaoundé, Cameroon

autor

Ndjigui Paul-Désiré

• Department of Earth Sciences, Faculty of Science, University of Yaoundé I, PO box 812, Yaoundé, Cameroon

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).