Abstract
Understanding the formation and the development of salt structures is very important especially because they are of significant economical interest. Detailed understanding of this process will help reservoir prediction and hydrocarbon recovery. In this work, we use a combination of geological observations along with the interpretation of geophysical data (seismic and Bouguer anomaly data) to better constrain the geology of the Jbel Cheid structure. The shape of Triassic body of Jbel Cheid (Northern Tunisian Atlas) structure and its geodynamic evolution have been determined by gravity analyses and 2.5D modeling, correlated with others geophysical data (seismic) and geological observations. Semi-automatic structural analysis was performed before modeling, to identify lateral gravity discontinuities. The complete Bouguer and residual gravity anomaly maps indicate a positive amplitude gravity anomaly over the Triassic evaporitic outcrop (Jbel Cheid) and prominent NE–SW-trending features associated with the boundary of the Triassic rocks and surrounded layers. The seismic profile shows a thickness variation of post-salt layers. Taking into account the 2.5D gravity model, seismic profile and surface data, geodynamic evolution of Jbel Cheid can be subdivided on three stages (reactive, active, and passive) which well correlated to the model proposed by Vendeville (2002).
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Benassi R, Jallouli C, Hammami M, Turki MM (2006) The structure of Jebel El Mourra, Tunisia: a diapiric structure causing positive gravity anomaly. Terra Nova 18:432–439
Bouaziz S, Barrier E, Soussi M, Turki MM, Zouari H (2002) Tectonic evolution of Northern African margin in Tunisia from paleostress data and sedimentary record. Tectonophysics 357:227–253
Bracene R, Patriat M, Ellouz N, Gaulier JM (2003) Subsidence history in basins of northern Algeria. Sediment Geol 156:213–239
Buness H et al (1992) The EGT’85 seismic experiment in Tunisia: a reconnaissance of the deep structures. Tectonophysics 207:245–267
Chikhaoui M (2002) La zone des diapirs en Tunisie: cadre structural, évolution géodynamique de la sédimentation méso-cénozoïque et géométrie des corps triasiques. Thèse de doct. Es Sciences. Université de Tunis el Manar. (323p)
Cordell L, Grauch VJS (1985) Mapping basement magnetization zones from aeromagnetic data in the sun juan basin, New Mexico. In Hinze WJ (ed) The utility of regional gravity and Magnetic Maps. Society of exploration geophysicists, pp. 181–197
Davison I, Daily P (2010) Salt tectonics in the Cap Boujdour Area, Aaiun Basin, NW Africa. Marine and Petroleum Geology 27:433–441
Dewey JF, Helman ML, Turco E, Hutton D, Knott SD (1989) Kinematics of the western Mediterranean. In Coward M, Dietrich D, Park R (eds) Alpine Tectonics. Geol. Soc. London, London, pp. 265–283
Hlaiem A (1999) Halokinesis and structural evolution of the major feature in eastern and southern Tunisian Atlas. Tectonophysics 306:79–95
Hudec R, Jackson MPA (2007) Terra infirma: understanding salt tectonics. Earth-Science Reviews 82:1–28
Jakson MPA, 1995 Retrospective salt tectonics. In Jackson MPA, Roberts DG, Senelson S (eds) Salt tectonics: A global perspective. AAPG Memoir, 65, pp. 1–28
Jakson MPA, Vendeville BC, Schultz-Ela DD (1994) Structural dynamics of salt systems. Annu Rev Earth Planet Sci 22:93–117
Jallouli C, Mickus K (2000) Regional gravity analysis of the crustal structure of Tunisia. J Afr Earth Sci 30:345–357
Jallouli C, Mickus K, Turki M (2002) Gravity constraints on the structure of the northern margin of Tunisia: implications on the nature northern African plate boundary. Geophys J Int 151:117–131
Jallouli C, Chikhaoui M, Brahem A, Turki MM, Mickus K, Benassi R (2005) Evidence for Triassic salt domes in the Tunisian Atlas from gravity and geological data. Tectonophysics 396:209–225
Krzywiec P (2004) Triassic evolution of the Klodawa salt structure: basement controlled salt tectonics within the Mid-Polish trough (central Poland). Geological Quaternary 48(2):123–134, Warszawa
Magdalena S, Ulf B, Bjorn L (2003) Salt movements in the northeast German Basin and its relation to major post-Permian tectonic phases-results from 3D structural modelling, backstripping and reflection seismic data. Tectonophysics 316:277–299
Maillard A, Virginie Gaullier V, Vendeville BC, Odonne F (2003) Influence of differential compaction above basement steps on salt tectonics in the Ligurian-Provencal Basin, northwest Mediterranean. Marine and Petroleum Geology 20:13–27
Nafe J, Drake C (1957) Variation with depth in shallow and deep water marine sediments of porosity, density and the velocities of compressional and shear waves. Geophysics 22:523–552
Perthuisot V (1978) Dynamique et pétrogenèse des extrusions triasiques en Tunisie septentrionale. Thèse de doctorat d’état, Ecole Normale Supérieure, Paris. no. 12 (312 pp.)
Sial Geosciences Inc (1998) Gravimétrie en Tunisie. Rapport inédit, Office National des Mines, Tunis
Talbot CJ (1993) Spreading of salt structures in the Gulf of Mexico. Tectonophysics 228:151–166
Talbot CJ, Aftabi P (2004) Geology and models of salt extrusion at Qum Kuh, central Iran. Journal of the Geological Society, London 161:321–334
Talbot CJ, Jaravis RJ (1984) Age, budget and dynamics of an active salt extrusion in Iran. Journal of Structural Geology 6:521–533
Telford W, Geldart L, Sheriff R (1990) Applied Geophysics. Cambridge Univ. Press, NY, 796 pp
Vendeville BC (2002) A new interpretation of Trusheim’s classic model of salt-diapir growth. Trans-Gulf Cost Assoc Geol Soc 52:943–952
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Benassi, R. Geodynamic evolution of Jbel Cheid (Northern Tunisian Atlas) from geophysical and geological data. Arab J Geosci 6, 1173–1182 (2013). https://doi.org/10.1007/s12517-011-0416-2
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DOI: https://doi.org/10.1007/s12517-011-0416-2