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Sedimentology and magnetic susceptibility of the Upper Eifelian - Lower Givetian (Middle Devonian) in southwestern Belgium: insights into carbonate platform initiation
Mabille, Cédric; Boulvain, Frédéric
2007In Alvaro, J. J.; Aretz, M.; Boulvain, Frédéric et al. (Eds.) Palaeozoic Reefs and Bioaccumulations: Climatic and Evolutionary Controls
 

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Abstract :
[en] The major part of the Hanonet Formation is deposited on a mixed siliciclastic– carbonate detrital ramp, whereas the top is dominated by carbonate-rimmed shelf-related sedimentation. The transition corresponds roughly to the Eifelian–Givetian boundary. This work is based on two stratigraphic sections located in the southern part of the Dinant Synclinorium. Petrographic study leads to the definition of 11 microfacies, which demonstrate important sedimentological differences existing between the sections. A curve showing microfacies evolution is interpreted in terms of changing bathymetry. An environmental model depicts the lateral transition from a multiclinal carbonate ramp (to the east) to a forereef setting (to the west). Magnetic susceptibility was used to establish accurate stratigraphic correlations between the two sections. It also leads to an appreciation of the relative importance of eustatic sea-level change and local sedimentation rate. The combined interpretation of the microfacies curves and the magnetic susceptibility provides a new view of the sedimentary dynamics of the studied sections and, in a more general way, a better understanding of the processes responsible for magnetic susceptibility variations in carbonate rocks.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Mabille, Cédric ;  Université de Liège - ULiège > Département de géologie > Pétrologie sédimentaire
Boulvain, Frédéric  ;  Université de Liège - ULiège > Département de géologie > Pétrologie sédimentaire
Language :
English
Title :
Sedimentology and magnetic susceptibility of the Upper Eifelian - Lower Givetian (Middle Devonian) in southwestern Belgium: insights into carbonate platform initiation
Publication date :
2007
Main work title :
Palaeozoic Reefs and Bioaccumulations: Climatic and Evolutionary Controls
Author, co-author :
Alvaro, J. J.
Aretz, M.
Boulvain, Frédéric  ;  Université de Liège - ULiège > Geology
Munnecke, A.
Vachard, D.
Vennin, E.
Publisher :
Geological Society, London, United Kingdom
ISBN/EAN :
978-1-86239-221-2
Collection name :
Special Publication 275
Pages :
109-124
Available on ORBi :
since 18 August 2009

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