Article (Scientific journals)
Sedimentology and magnetic susceptibility of Mississippian (Tournaisian) carbonate sections in Belgium
Bertola, C.; Boulvain, Frédéric; Da Silva, Anne-Christine et al.
2013In Bulletin of Geosciences, 88 (1), p. 69-82
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Keywords :
magnetic susceptibility; Mississippian; limestone; facies; ramp; Belgium
Abstract :
[en] Magnetic susceptibility (MS) and biostratigraphy have been used to correlate better the reference sections of Belgian Tournaisian, the Rivage road and railway sections and the Gendron-Celles railway section. These 200 m thick time-equivalent sections are about sixty kilometres apart and belong to two different sedimentation areas: a shallow ramp setting for Rivage (Condroz Sedimentation Area, Hance et al., 2001) and a subsiding area for Gendron (Dinant Sedimentation Area). The sedimentological model shows that both sections are characterized by a bioclastic dominated sedimentation (crinoids-peloids-algae assemblages), interrupted by more argillaceous facies related to rapid sea-level rises (crinoids-brachiopods-bryozoans assemblages). Accommodation was significantly higher in the DSA and allowed the development of Waulsortian buildups during the Ivorian. Variations of magnetic susceptibility (MS) seem to be related to fluctuations in detrital input and carbonate productivity. MS evolution with palaeogeography can be integrated in the Da Silva et al. (2009a) model for the Devonian ramp system: external ramp settings have low carbonate productivity, low water agitation and high MS, whereas more proximal environments are characterized by higher carbonate productivity, higher water agitation and lower MS. Carbonate buildups show the lowest MS and highest productivity. MS curves are in agreement with the 3rd-order sequential interpretation. Lowstand system tracts (LST) show the highest MS values while transgressive system tracts (TST) are characterized by decreasing values and highstand system tracts/ falling stage system tracts (HST/FSST) by the lowest values.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Bertola, C.
Boulvain, Frédéric  ;  Université de Liège - ULiège > Département de géologie > Pétrologie sédimentaire
Da Silva, Anne-Christine  ;  Université de Liège - ULiège > Département de géologie > Pétrologie sédimentaire
Poty, Edouard ;  Université de Liège - ULiège > Département de géologie > Paléontologie animale et humaine
Language :
English
Title :
Sedimentology and magnetic susceptibility of Mississippian (Tournaisian) carbonate sections in Belgium
Publication date :
2013
Journal title :
Bulletin of Geosciences
ISSN :
1214-1119
eISSN :
1802-8225
Publisher :
Czech Geological Survey, Prague, Czechia
Volume :
88
Issue :
1
Pages :
69-82
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
IGCP 580 "Application of magnetic susceptibility on Palaeozoic sedimentary rocks"
Available on ORBi :
since 11 December 2012

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