Research output per year
Research output per year
Johan YANS, Michele Verhaert, Cécile Gautheron, Pierre-Olivier Antoine, Béchir Moussi, Augustin Dekoninck, Sophie Decrée, R. Chaftar, N. HATIRA, Christian Dupuis, Rosella Pinna-Jamme, Fakher Jamoussi
Research output: Contribution to journal › Article › peer-review
The mining district of Nefza-Sejnane (Tunisia) encloses numerous ores and raw material deposits, all formed in relation with successive Fe-rich fluids of meteoric and/or hydrothermal origins. Here, for the first time in Tunisia, (U-Th)/He ages were obtained on supergene goethite from various localities/deposits of the district highlight direct dating of significant weathering episodes during late Tortonian and late Pleistocene. These weathering events are most likely associated with favorable conditions that combine (i) wet climate displaying sufficient meteoric water/fluid; and (ii) regional exhumation, due to large-scale vertical lithospheric movements enhancing the percolation of fluids. Matched with previous works, these results refine the stratigraphic frame for the polymetallic mineralization and clay deposits in the district, confirming the influence of meteoric fluids circulation during the late Cenozoic. As a consequence of the new (U-Th)/He data, we moreover propose a taxonomic and stratigraphic revision of the well-known mammalian fauna from the Fe-rich Douahria locality, suggesting an early Tortonian age for the fossils, i.e., prior to the first episode of meteoric event in the area.
Original language | English |
---|---|
Article number | 260 |
Pages (from-to) | 1-19 |
Number of pages | 19 |
Journal | Minerals |
Volume | 11 |
Issue number | 3 |
DOIs | |
Publication status | Published - 1 Mar 2021 |
Acknowledgments: P.-O.A. is particularly grateful to Emmanuel Robert (Universit\u00E9 de Lyon; Douahria specimens) and to Christine Argot (Mus\u00E9um National d\u2019Histoire Naturelle, Paris; comparison material) for having granted access to the collections they are in charge of, and to Fabrice Lihoreau and Denis Geraads for sharing their expertise. This work was partly funded by the Belgian Science Policy Office, project BR/121/A3/PALEURAFRICA, and by the project entitled \u201CValorisation des argiles tunisiennes\u201D of WBI (Wallonie-Bruxelles International). This research used resources of the Electron Microscopy Service, which is a member of the \u201CPlateforme Technologique Morphologie\u2013Imagerie\u201D of the University of Namur (UNamur). Mich\u00E8le Verhaert thanks the Belgian National Fund for Scientific Research (FNRS), for providing a FRIA PhD grant. C.G. thanks the RECA ANR-17-CE01-0012-01 project for funded (U-Th)/He analysis. Wallonie-Bruxelles International: Projet 8-axe 2 Agence Nationale de la Recherche: RECA ANR-17-CE01-0012-01.
Funders | Funder number |
---|---|
Fonds De La Recherche Scientifique - FNRS | |
Wallonie-Bruxelles International | |
Agence Nationale de la Recherche | RECA ANR-17-CE01-0012-01, ANR-17-CE01-0012 |
UK Research and Innovation | 103674 |
Belgian Federal Science Policy Office | BR/121/A3/PALEURAFRICA |
RECA | ANR-17-CE01-0012-01 |
Research output: Contribution to journal › Article › peer-review
Research output: Contribution to journal › Article › peer-review
Research output: Contribution to journal › Article › peer-review