Geologica Belgica

1374-8505 2034-1954

 

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Frédéric BOULVAIN, Isabelle BELANGER, Pierre GHYSEL, Martin LALOUX, Marc ROCHE, Dominique DELSATE, Danièle DOSQUET, Hervé TEERLYNCK, Jacques THOREZ & Pascal GODEFROIT

New lithostratigraphical, sedimentological, mineralogical and palaeontological data on the Mesozoic of Belgian Lorraine: a progress report

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Mots-clés : lithostratigraphy, palynology, palaeontology, KEYWORDS: Lorraine, Triassic, Jurassic, boreholes, petrography, clay mineralogy.

Abstract

In memory of Pierre-Louis Maubeuge (1923-1999)

ABSTRACT. A multidisciplinary study of some extensively cored boreholes together with the new 1/25.000 geologi­cal mapping of Wallonia led us to propose a new lithostratigraphic canvas for Belgian Lorraine. This area is located on the N-E border of the Paris Basin, south of the Ardennes; the studied stratigraphic interval covers the Keuper to the Toarcian. Each of the new lithostratigraphic units is interpreted by macroscopic and microscopic sedimentological observations. Detailed palynological and claystratigraphical analyses were also performed, providing additional stratigraphical, palaeoecological and sedimentological data. The Habay Formation (conglomerates and red mudstones) is a fluvial unit, with immature channel conglomerates and paleosoils. The Attert Formation (dolomitic marls with gypsum and pseudomorphs) exhibits an evaporitic trend. The Mortinsart Formation (sands and marls) corresponds to a restricted marine unit, evolving towards an alluvial plain (Levallois Member). The second cycle begins with the Jamoigne Formation (bioturbated marls and limestones), a marine subtidal restricted unit, evolving towards a more sandy series (Metzert Member). The base of the third cycle corresponds to the rest of the Luxembourg Formation, composed by a superposition of sand waves. The Ethe Formation (laminar mudstones and marls) marks a deepening of the basin and the outset of marine dysaerobic conditions. The Aubange Formation (bioturbated marls with sandstones and limestones) is characterized by the reappearance of a normal benthic fauna. The Grandcourt Formation (laminar mudstones and marls) marks a return to open marine dysaerobic conditions. The Mont-Saint-Martin Formation (marls, sandy marls and oolitic ironstone) is a highly regressive unit, while the Longwy Formation (limestones) marks the initiation of a carbonate platform.

To cite this article

Frédéric BOULVAIN, Isabelle BELANGER, Pierre GHYSEL, Martin LALOUX, Marc ROCHE, Dominique DELSATE, Danièle DOSQUET, Hervé TEERLYNCK, Jacques THOREZ & Pascal GODEFROIT, «New lithostratigraphical, sedimentological, mineralogical and palaeontological data on the Mesozoic of Belgian Lorraine: a progress report», Geologica Belgica [En ligne], volume 3 (2000), number 1-2, 3-33 URL : http://popups.ulg.ac.be/1374-8505/index.php?id=1907.

About: Frédéric BOULVAIN

Géologie-Pétwlogie-Géochimie, B20, Université de Liège, Sart Tilman, 4000 Liège.

About: Isabelle BELANGER

Service géologique de Belgique, 13 rue Jenner, 1000 Bruxelles.

About: Pierre GHYSEL

Service géologique de Belgique, 13 rue Jenner, 1000 Bruxelles.

About: Martin LALOUX

Service géologique de Belgique, 13 rue Jenner, 1000 Bruxelles.

About: Marc ROCHE

Service géologique de Belgique, 13 rue Jenner, 1000 Bruxelles.

About: Dominique DELSATE

Laboratoire de Paléontologie-Géologie, C.R.S. du Musée national d'Histoire naturelle de Luxembourg, 25, rue Munster, L-2160 Luxembourg.

About: Danièle DOSQUET

Géologie générale et sédimentologie des siliciclastiques, B18, Université de Liège, Sart Tilman, 4000 Liège.

About: Hervé TEERLYNCK

Géologie générale et sédimentologie des siliciclastiques, B18, Université de Liège, Sart Tilman, 4000 Liège.

About: Jacques THOREZ

Géologie générale et sédimentologie des siliciclastiques, B18, Université de Liège, Sart Tilman, 4000 Liège.

About: Pascal GODEFROIT

Département de Paléontologie, Institut royal des Sciences naturelles de Belgique, 29 rue Vautier, 1000 Bruxelles.