The Hondelange Formation and the sequence stratigraphic model of Belgian Lorraine

Abstract

1. Introduction This work follows up former papers dedicated to major boreholes in Belgian Lorraine and Grand Duchy of Luxembourg: the Latour borehole (Boulvain & Monteyne, 1993, revised by Boulvain et al., 1995), the Neulimont, Aubange, Saint-Mard and Toernich boreholes (Boulvain et al., 1995), the Villers-devant-Orval borehole (Boulvain et al., 1996) and more recently, the Bonnert, Haebicht, Grouft, Grund, and Consdorf boreholes (Boulvain et al., 2017). These studies, together with data resulting from the geological mapping project for Wallonia (Belanger et al., 2002; Ghysel et al., 2002; Belanger, 2006 a, b; Ghysel & Belanger, 2006) led to a synthesis formalized by a new lithostratigraphical scheme for Belgian Lorraine (Boulvain et al., 2001 a, b). Besides stratigraphical data, the boreholes survey provided results for petrography, clay mineralogy, palynology and paleontology (Boulvain et al., 2001a; Boulvain et al., 2017). The purpose of the current work is (1) to suggest a new status for the Hondelange Formation, formerly considered as a member of the Arlon Formation (Boulvain et al., 2001b) and (2) by synthetizing all the information acquired from the boreholes and outcrops, to propose a sequence stratigraphic interpretation for the Triassic and Jurassic of Belgian Lorraine and border areas. 2. Geological setting The studied Triassic to Jurassic successions are confined to the south eastern part of Belgium, i.e. the Belgian Lorraine and to the Guttland region of G.-D. o