Sea-level and environmental changes around the Devonian–Carboniferous boundary in the Namur–Dinant Basin (S Belgium, NE France): A multi-proxy stratigraphic analysis of carbonate ramp archives and its use in regional and interregional correlations

摘要: Abstract The paper focuses on high-resolution multidisciplinary research three Devonian–Carboniferous boundary sections in shallow-water carbonate rocks the Namur–Dinant Basin (Belgium, France). aim of study is to provide palaeo-environmental reconstructions and correlations supported by several independent quantitative proxies. We describe correlative horizons their sequence-stratigraphic interpretation based facies analysis, spectral gamma-ray data, element concentrations (XRF) δ13Ccarb, with foraminifer-biostratigraphy age control. most prominent surface a basal forced regression, which indicated sharp basinwards shift drop clay-gamma-ray values Al at base Hastiere Avesnelles formations more distal settings. In proximal settings, this merges hiatus inferred from foraminifer biostratigraphy. This can be correlated global Hangenberg sandstone event, indicates glacioeustatic sea-level fall. Increasing Zr/Al, K/Al, Sr/Al Mn/Al coincide falling stage system tract lowstand as consequence enhanced input siliciclastics nutrients during low sea levels. top middle member interpreted maximum regression surface, overlain transgressive upper member. patterns gamma-ray, Th/K, Zr/Al curves are well between studied sections. δ13Ccarb excursions unnamed excursion Upper expansa conodont zone (Carnic Alps) event s.l. kockeli zone. framework used for deltaic successions Tafilalt Basin, Morocco. equivalent typical deeper-water easily recognisable correlatable gaps more-shallow water suggest that it should taken into account possible candidate “natural solution” discussions concerning its redefinition.