Filtering of the gravimetric anomalies to the study of the geological structures of Oued Zarga (Septentrional Tunisia): structural implications

• Published in: Arabian journal of geosciences Vol. 5; no. 1; pp. 169 - 180
• Main Authors: Ayed-Khaled, Amira, Ghanmi, Mohamed, Zargouni, Fouad
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer-Verlag 01-01-2012
• Subjects: Earth and Environmental Science; Earth Sciences; Original Paper; Tunisia; Triassic; Upward continuation; Bouguer; Salt diapir; Tunisia
• ISSN: 1866-7511; 1866-7538
• DOI: 10.1007/s12517-010-0232-0

Gravity data were analysed in the Northern Tunisian Atlas (case study of Oued Zarga area) to better understand the organization of its underlying structures. The gravity data analysis included the construction of a gravity anomaly maps and two and a half dimensional gravity model. The qualitative analysis of gravimetric maps served for the foundation of a new structural map of the study region that constitutes a new contribution of the gravimetry in this present work. In addition, the complete Bouguer and residual gravity anomaly maps indicate a negative gravity anomaly over the Triassic evaporitic outcrops of Jebel Guerouaou and prominent NE–SW-trending features associated with the boundary of the Triassic rocks and surrounded layers. A NW–SE-trending gravity model that crosses the Triassic evaporitic outcrop at Jebel Guerouaou can be explained by a deep-rooted salt diapir.