Evidence for Triassic salt domes in the Tunisian Atlas from gravity and geological data

Jallouli, Chokri; Chikhaoui, M.; Braham, Ahmed; Turki, Mohamed Moncef; Mickus, Kevin L.; Benassi, Ramdhane

doi:10.1016/j.tecto.2004.12.003

Cited by 70 publications

(31 citation statements)

References 20 publications

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“…The Aptian-Albian history of diapir piercement, emergence, and outpouring in an overall transcurrent tectonic setting is showed in North Africa, Pyrenean, and North Atlantic domains (Hiscott et al, 1990;Vila et al, 1994Vila et al, , 2001Letouzey et al, 1995;Le Vot et al, 1996;Zitouni, 1997;Perthuisot et al, 1999;Bédir et al, 2000;Vergés and Garcia-Senz, 2001;Canérot et al, 2005;Jallouli et al, 2005;Talbot et al, 2005;Zouaghi et al, 2005a,b;Zouaghi, 2008).…”

Section: Movement Of Triassic Evaporite Bodiesmentioning

confidence: 99%

Analysis of Cretaceous (Aptian) strata in central Tunisia, using 2D seismic data and well logs

Zouaghi

Ferhi

Bédir

et al. 2011

Journal of African Earth Sciences

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Section: Movement Of Triassic Evaporite Bodiesmentioning

confidence: 99%

Analysis of Cretaceous (Aptian) strata in central Tunisia, using 2D seismic data and well logs

Zouaghi

Ferhi

Bédir

et al. 2011

Journal of African Earth Sciences

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“…The study area; Utica-Mateur region, is located in northeasternTunisia, extending from 37°13'30'' to 36°49'30"N latitudes to 9°33'0" to 10°15'0" E longitudes Most of the Triassic deposits consist of a chaotic mass of evaporite-dominated lithology comprising mainly of halite and gypsum (Jallouli et al 2005;Melki et al 2012). The…”

Section: Study Areamentioning

confidence: 99%

Hypsometric integral for the identification of neotectonic and lithology differences in low tectonically active area (Utica-Mateur region, north-eastern Tunisia)

Rabii

Rebai

Jallouli

2016

Geocarto International

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The present work tests the use of hypsometric integral (HI) in identifying neotectonic and lithology signals in the Utica-Mateur basin (northeastern Tunisia), a region recognized by low deformation rates. We computed HI values using three digital elevation models (DEMs) of 10, 30 and 90 m pixel resolution.We extracted maximum, minimum, and mean elevations from each DEM. The obtained results reveal that the HI spatial distributions did not demonstrate clear spatial patterns and did not correlate with geological substrates. We also find that the distribution of HI is independent of the DEM resolution, butare influenced by the size of the moving window.By applying the hotspot analysis (Gi*-statistics) on extracted HI data, we find two main clusters with high (hotspots) and low (cold spots) HI values. These hotspots correspond mainly to active faults and coincide with shallow earthquake clusters in the study area. IntroductionHypsometry describes area distribution at different elevations (Strahler 1952)and can be estimated using the hypsometric curve (HC) and the hypsometric integral (HI). The HC was developed by Strahler (1952)to infer the temporal stages of geomorphic development of watersheds. This curve is classically obtained by plotting the proportion of the total basin height (i.e. relative height) against the proportion of total basin area (i.e. relative area). It can also be displayed in non-dimensional form, allowing direct comparison of watersheds, irrespective of scale issues. The HI was defined as the area under the HC (Strahler 1952), and it has been used to investigate the Downloaded by [La Trobe University] at 02:17 01 June 2016 4 geomorphological stage of a basin. The HI can be estimated by means of the following equation ( Pike &Wilson 1971): elevation) minimum -elevation (maximum elevation) minimum -elevation (mean = HI (1) Strahler (1952) proposed three geomorphic stages to explain the distinctive series of hypsometric curves. Based on the hypsometric curves shapes, he classified drainage basins as following: (1) convex hypsometric curves with HI above 0.6 are typical of youthful stage, (2) S-shaped hypsometric curves with HI in the range 0.35 to 0.6 are related to maturity stage, and (3) concave hypsometric curves with HI below 0.35 are indicative of Monadnock stage. This classification was adopted by many researchers as an estimator of erosion status of watershed leading to prioritization of watershed for soil and water conservation measures(Singh et al. 2008).

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“…Theoretically, the salt Triassic deep-seated masses have less density than the surrounding Cretaceous series; they should present a negative gravity anomaly (Jallouli et al 2005;Arfaoui et al 2011). Many reasons prevent the Tunisian salt Triassic outcrops from showing negative Bouguer anomaly as known with conventional models of salt domes.…”

Section: Contribution Of Gravity Analysis To the Structural Interpretmentioning

confidence: 99%

Major faults, salt structures and paleo-ridge at tectonic nodes in Northern Tunisia: contribution of tectonics and gravity analysis

et al. 2014

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Structural analysis, fault kinematics, detailed geological mapping and gravity analysis provide a new approach regarding to the tectonic-model of the Bazina-Aouana structure (North-Eastern Tunisia). They show that the Bazina Triassic outcrops, such as several other structures, are related to the NE and E trending major faults junction, controlling its halokinesis, and pouring out to the NW of tectonic nodes in the collapsed compartment. During the Eocene and Tortonian compressive phases, the Triassic materials previously forming a intumescence in the NE and E major faults intersection have acted as a barrier on which collided the Aouana structure. Therefore, this structure is blocked between overthrust nappes and the Bazina paleo-ridge forming an imbricated zone overlapping the Triassic materials. This paper aims to present a new evolutionary geodynamic model for the Bazina-Aouana structure related to the tectonic node easing the Triassic salt mobilization, the paleo-ridge formation and the development of a collapsed zone. By comparing with previous works, this model is likely applicable to the important Triassic outcrops of Northern Tunisia.

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Evidence for Triassic salt domes in the Tunisian Atlas from gravity and geological data

Cited by 70 publications

References 20 publications

Analysis of Cretaceous (Aptian) strata in central Tunisia, using 2D seismic data and well logs

Analysis of Cretaceous (Aptian) strata in central Tunisia, using 2D seismic data and well logs

Hypsometric integral for the identification of neotectonic and lithology differences in low tectonically active area (Utica-Mateur region, north-eastern Tunisia)

Major faults, salt structures and paleo-ridge at tectonic nodes in Northern Tunisia: contribution of tectonics and gravity analysis

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