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Sédimentation de rampe mixte silico-carbonatée des couches de transition eiféliennes-givétiennes franco-belges: Première partie: microfaciès et modèle sédimentaire

par Préat, Alain ;Kasimi, R.
Référence Bulletin des Centres de recherches exploration-production Elf-Aquitaine. Mémoire, 19, 2, page (329-375)
Publication Publié, 1995

Article révisé par les pairs

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Résumé :

The Belgian carbonate-dominated Devonian series, about 1.5 km thick, shows the succession of silico-carbonate ramp systems and carbonate platforms with slight slope and no real barrier. This article consists of a systematic study of the Belgian-French Upper Eifelian-Lower Givetian stratigraphic interval (Tortodus kockelianus and Polygnathus ensensis conodont zones). A sedimentological model for this Eifelian-Givetian, argillaceous carbonate succession enables the recognition of 10 major microfacies. They range from the open marine (below the storm-wave base) to reefal complexes, open lagoons and peritidal environments near subaerial exposure. The sedimentary model consists of a homoclinal, storm-influenced ramp system showing a large shoreface extension. The cyclostratigraphical analysis of these Eifelian-Givetian facies will specify the evolution of the third order eustatic curve and establish the palaeotectonic structure of the studied area. -from English summary