Abstract
Located between eastern segments of the Atlas and Tell-Rif oro-genic belts, the “Dome zone” of northern Tunisia is characterized by the juxtaposition of various structures that mainly controlled the long geody-namic history of this part of the south-Tethyan Margin. To better understand the organization and deep extension of these structures, gravity data from the Teboursouk key area are proposed. These data include the plotting of Bouguer anomaly map and related parameters such as vertical and horizontal gradients, upward continuation and Euler solution. Compared to geological and structural maps available, they allow the identification of new deep structures and greater precision regarding the characteristics and organization of known ones; consequently, an updated structural pattern is proposed.
Highlights
Northern Tunisia is an extension of the Tell-Rif eastern segments and the north-Atlasic domain (Fig. 1A)
The Teboursouk area belongs to the “Diapirs zone” of northern Tunisia which is adjacent to the northernmost Atlasic domain
Since the 1920s, particular attention has been paid to this key sector by many geologists interested in thematic investigations aiming at the reconstruction of geodynamic evolution of the Tunisian Tethys Margin and its controlling factors (Biely et al 1974, Ben Ayed 1994, Chihi 1995, Gueguen et al 1998, Guiraud et al 2005, Rigane and Gourmelen 2011)
Summary
Northern Tunisia is an extension of the Tell-Rif eastern segments and the north-Atlasic domain (Fig. 1A). It is considered as one of the important sectors where the complex geological history of the Maghrebian south-Tethyan Margin can be reconstructed. GRAVITY DATA FROM THE TEBOURSOUK AREA, NW TUNISIA fied structures were repeatedly affected by successive phases leading to the present-day structure. The Teboursouk area belongs to the “Diapirs zone” of northern Tunisia which is adjacent to the northernmost Atlasic domain. The subject of this paper, we propose to follow the distribution of density contrasts due to depressions and faults aiming to increase our understanding of the deep geological structure using unpublished gravity data (Hachani 2006). Interpretation of the Bouguer anomaly map and related derivative compilations serve as a base for deep structures’ characterization; an updated tectonic pattern is proposed for the area replaced in its broader geodynamic context
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