Paleoenvironmental and paleogeographic characterization of the 12 frères borehole, fresco, southwestern Côte d’Ivoire: Palynological implication
1 Department of Mining and Reservoirs, UFR of Geological and Mining Sciences, University of Man, BP 20 Man, Côte d’Ivoire.
2 Geoscience Département, UFR of Biological Sciences, University Péléforo Gon Coulibaly, BP 1328 Korhogo, Côte d’Ivoire.
3 Département of Marine Geosciences, UFR-STRM, University Félix Houphouët Boigny, 22 P.B. 582 Abidjan 22, Côte d’Ivoire.
4 Department of Geology, Research Unit UR 11 ES 15, Faculty of Sciences, University of Tunis El Manar, University Campus, 2092, El Manar II, Tunisia.
Research Article
World Journal of Advanced Research and Reviews, 2022, 16(03), 958-968
Article DOI: 10.30574/wjarr.2022.16.3.1454
Publication history:
Received on 14 November 2022; revised on 25 December 2022; accepted on 28 December 2022
Abstract:
Maastrichtian to Ypresian-dated sediments from the 12 Frères borehole. (Fresco, southwestern Côte d'Ivoire), are here investigated for paleoenvironmental and paleogeographic significance. For this study, the preparation of palynological slides in the laboratory is done in three steps.: (1) sampling and physical treatment, (2) chemical attacks (HCl 10%, HF 40%) to dissolve the mineral matter and preserve the organic matter contained in the sediments, (3) mounting the collected organic matter between slide and coverslip for microscopic study. Quantitative analyses of dinoflagellate cysts and other palynomorphs have allowed reconstructions of paleoenvironments. Thus, from bottom to top, nine (9) depositional environments ranging from outer neritic to inner neritic via a lagoon or estuarine environment were determined. Following Lentin and Williams (1980), the deposits in the 12 Frères section are attributed to a tropical to subtropical province paleogeography.
Keywords:
Paleoenvironment; Paleogeography; Dinoflagellate cysts; Fresco; Côte d’Ivoire
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