Rapport de synthèse : recherche d’indicateurs sédimentaires, diagénétiques et structuraux, prédiction des corps dolomitiques réservoirs: application à la plate-forme carbonatée du Jurassique supérieur (Oxfordien à Portlandien) des Causses Méjean- France. 202p.

Report (2006)

Subaerial exposure recording on a Paleocene carbonate platform – Example of the Campo section, Spain

Conference (2006)

Rapport de synthèse : typologie des paléoémersions, processus sédimentaires et diagénétiques associés : conséquences sur la microporosité.

Report (2005)

Paléoémersions : processus sédimentaires et diagénétiques associés

in 10ème congrès français de sédimentologie - livret des résumés (2005)

Géologie du Dévonien et du Carbonifère au nord de l'Ardenne (Synclinoriums de Namur et de Dinant au sud de Liège)

Scientific conference (2005)

Reconstructing atoll-like mounds from the Frasnian of Belgium

in Facies (2004), 50(2), 313-326

A succession of Frasnian mounds on the southern border of the Dinant Synclinorium (Belgium) was investigated for their facies architecture, sedimentary dynamics and palaeogeographic evolution. Seven mound ... [more ▼]

A succession of Frasnian mounds on the southern border of the Dinant Synclinorium (Belgium) was investigated for their facies architecture, sedimentary dynamics and palaeogeographic evolution. Seven mound facies were defined from the Arche (A) and Lion (L) members, each characterized by a specific range of textures and association of organisms (A2/L2: red or pink limestone with stromatactis, corals and crinoids; A3/L3: grey, pink or green limestone with stromatactis, corals and stromatoporoids; A4/L4: grey limestone with corals, peloids and dasycladaceens; A5/L5: grey microbial limestone; A6/L6: grey limestone with dendroid stromatoporoids, A7/L7: grey laminated limestone with fenestrae; and A8/L8: grey bioturbated limestone). Laterally equivalent sediments include substantial reworked material from the buildups and background sedimentation. Textures and fossils suggest that A2/L2 and A3/L3 facies developed close to storm wave base, in a subphotic environment. Facies A4/L4, occurring near fair weather wave base in the euphotic zone, includes lenses of A5/L5 with stromatolitic coatings and thrombolithes. A6/L6 corresponds to a slightly restricted environment and shows a progressive transition to fenestral limestone of A7/L7. This facies was deposited in a moderately restricted intertidal area. A8/L8 developed in a quiet lagoonal subtidal environment. The mounds started with A2/L2 or A3/L3 in which microbial lenses and algal facies A4/L4 became progressively more abundant upwards. Following 20 in of laterally undifferentiated facies, more restricted facies occur in the central part of the buildups. This geometry suggests the initiation of restricted sedimentation, sheltered by bindstone or floatstone facies. The facies interpretation shows that after construction of the lower part of the mounds during a transgression and a sea-level highstand, a lowstand forced reef growth to the margin of the buildups, initiating the development of atoll-like crowns during the subsequent transgressive stage. The persistence of restricted facies results from the balance between sea-level rise and reef growth. [less ▲]

Magnetic susceptibility: a powerful tool for correlations and sedimentological reconstruction of carbonate platform ?

in Abstract book - 23th IAS meeting, Coimbra, Portugal (2004)

From palaeosols to carbonate mounds: facies and environments of the middle Frasnian platform in Belgium

in Geological Quarterly (2004), 48(3), 253-265

This paper provides a synthetic sedimentological overview of the middle Frasnian carbonate platform of Belgium and associated carbonate mounds. Carbonate mounds started usually in a relatively deep, quiet ... [more ▼]

This paper provides a synthetic sedimentological overview of the middle Frasnian carbonate platform of Belgium and associated carbonate mounds. Carbonate mounds started usually in a relatively deep, quiet subphotic environment with a crinoid-coral-sponge assemblage, then reached the fair-weather wave base and the euphotic zone with an algal-microbial facies. The upper parts of the mounds are characterised by lateral facies differentiation with the algal-microbial facies protecting a central sedimentation area with a dendroid stromatoporoids facies and fenestral limestone. The lateral facies reflect different kinds of input of reworked mound material in the proximal area, from transported fine-grained sediment to coarse-grained fossil debris. On the platform, environments range from the outer zone (crinoidal facies) to stromatoporoid-dominated biostromes and to the lagoonal area of the inner zones (subtidal facies with Amphipora floatstone, algal packstone, intertidal mudstone and laminated peloidal packstone and palacosols). These facies are stacked in metre-scale shallowing-upward cycles. The larger scale sequential organisation corresponds to transgressions and regressions, whose cycles are responsible for differentiating a lower open-marine biostrome dominated unit from an upper lagoonal unit. The last regression-transgression cycle, responsible for the platform-scale development of lagoonal facies, can be correlated with an atoll-stage evolution of the carbonate mounds belonging to the Lion Member. [less ▲]

Applications de la susceptibilité magnétique et sédimentologie des carbonates, exemple du Frasnien de Belgique et du Canada.

Scientific conference (2003, December)

Comparaison des dépôts frasniens des Ardennes (Belgique) et de l’Alberta (Canada): apports de la susceptibilité magnétique

Conference (2003, January)