Caractérisation géométrique et cinématique des structures liées aux phases compressives de l'Éocène au Quaternaire inférieur en Tunisie : exemple de la Tunisie nord-orientale

Mzali, Houcem; Zouari, Hédi

doi:10.1016/j.crte.2006.05.003

Cited by 36 publications

(25 citation statements)

References 14 publications

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“…This syn-sedimentary structure, well expressed during the Upper Eocene, fossilized the Pyrenean phase of folding (Yaïch 1984). This phase continued until the Upper Eocene (Morelli 1976;Letouzey and Trémolières 1980;Haller 1983;El Ghali et al 2003;Mzali and Zouari 2006), with a constraint σ 1 oriented NW-SE to NS. During this period, the N120°faults are reactivated in dextral shears; EW faults have a normal component and NE-SW faults have a reverse component, whereas NE-SW folds are outlined and the raise of the Triassic deposits is emphasized by listric faults (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…During the Plio-Quaternary compressive phase, of which NW-SE to NS oriented σ 1 (Boukadi 1985;Zargouni 1985;Bédir and Bobier 1987;Zouari 1995;Bouaziz et al 2002;Khomsi et al 2006;Mzali and Zouari 2006), the N120°faults acted as reverse dextral shears. The associated faults are remobilized with a normal component for NW-SE directions and with a reverse component for EW and NE-SW directions.…”

Section: Paleogene-neogenementioning

confidence: 99%

“…At the Upper Miocene, a compressive phase of σ 1 stress is oriented N120-140° (Mzali and Zouari 2006), and the N120°f aults are reactivated in dextral shear. Within sites 6 and 7 on the conglomerates of the Segui Formation, located north of Ouled Abdallah village, two families of faults were identified.…”

Section: Paleogene-neogenementioning

confidence: 99%

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Seismic and well log post-Cretaceous reservoir correlations in the Sahel, east Tunisia

et al. 2015

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International audienceThe eastern part of Tunisia is made up of the Atlasic chain foreland, a domain connected to a continental crust which thins northeastward. It is limited to the west and northwest by the corridor of the NS axis faults and by the Zaghouan fault which separates it from the Atlasic domain and trends toward the Pelagian Sea eastwards. It is regarded as a stable zone. The signs of the main events which generated the Atlasic structures are hidden under a thick Plio-Quaternary cover. From surface observations, microtectonic measurements, and lithostratigraphic sections and logs, including those of oil well log data and seismic profiles onshore and offshore, one notes (i) an in-depth and lateral variation of the lithostratigraphic series and (ii) a considerably faulted area at subsurface characterized by a complex structural evolution and shears associated with basins. Such variations are controlled by tectonics and eustatism. The eastern platform is affected only by N45° oriented folds, often accompanied by reverse faults and associated with N90–110° dextral and N160–180° sinistral shears. It corresponds to a tectonic foreland domain representing a folded and sheared deformation zone. The tectonic deformations recognized by seismic data only affect narrow corridors, lengthened and oriented according to three major directions: N45°, N100–120°, and N160–180°. These zones, mobile at several geological periods and tectonically complex, delimit large sectors which have undergone minimal deformation or none at all. Well developed in the Sahel, the reservoirs are carbonated and fractured types such as the limestones of Abiod, Metlaoui, Souar and Chérahil, Aïn Grab, and the Oum Dhouil group. Structural traps for the accumulation of hydrocarbons were formed following these Atlasic compression and folding phases. The deposit of thick argillaceous series during the Eocene (Souar and Chérahil) and during the Miocene (Oum Dhouil) constitutes good continuous covers which sealed the folded and faulted reservoir structures. The seismic profiles show traps which are associated with folded and closure structures by faults and stratigraphic traps through facies changes. The structural inversions and the thrust tectonics in eastern Tunisia play a significant role in the structuring of the cover and also in the evolution of the oil system emplacement. The reservoirs are supplied by bed rocks of the Cretaceous (Bahloul Formation) and the Eocene (Metlaoui Formation)

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Section: Discussionmentioning

confidence: 99%

Section: Paleogene-neogenementioning

confidence: 99%

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Seismic and well log post-Cretaceous reservoir correlations in the Sahel, east Tunisia

et al. 2015

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“…Throughout the Late PlioceneEarly Quaternary period, the region was exposed to complicated tectonic events. Indeed, the Pliocene-Early Quaternary tectonic activity has resulted in NE-SW folds structures, which are associated with East-West to N120 dextral reverse faults and NE-SW faults with a reverse component (Mzali and Zouari 2006;Mzali et al 2007).…”

Section: Geology and Hydrogeologymentioning

confidence: 99%

“…From tectonic point of view, the major structures recognized in the study area are mainly resulted from the relative movement of the African and the Eurasian plates (Mzali and Zouari 2006). Throughout the Late PlioceneEarly Quaternary period, the region was exposed to complicated tectonic events.…”

Section: Geology and Hydrogeologymentioning

confidence: 99%

Investigation of groundwater mineralization in the Hammamet–Nabeul unconfined aquifer, north-eastern Tunisia: geochemical and isotopic approach

Moussa¹,

Salem²,

Zouari³

et al. 2010

Environ Earth Sci

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Detailed hydrogeochemical and isotopic data of groundwaters from the Hammamet-Nabeul unconfined aquifer are used to provide a better understanding of the natural and anthropogenic processes that control the groundwater mineralization as well as the sources of different groundwater bodies. It has been demonstrated that groundwaters, which show Na-Cl and Ca-SO 4 -Cl water facies, are mainly influenced by the dissolution of evaporates, the dedolomitization and the cation-exchange process; and supplementary by anthropogenic process in relation with return flow of irrigation waters. The isotopic signatures permit to classify the studied groundwaters into two different groups. Non-evaporated groundwaters that are characterized by depleted d 18 O and d 2 H contents highlighting the importance of modern recharge at higher altitude. Evaporated groundwaters with enriched contents reflecting the significance infiltration of return flow irrigation waters. Tritium data in the studied groundwaters lend support to the existence of pre-1950 and post-1960 recharge. Carbon-14 activities in shallow wells that provide evidence to the large contamination by organic 14 C corroborate the recent origin of the groundwaters in the study area.

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An outcrop-scale compound fault structure in the Monastir shore cliff, Central-east Tunisia

Mzali

2021

Int J Earth Sci (Geol Rundsch)

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Caractérisation géométrique et cinématique des structures liées aux phases compressives de l'Éocène au Quaternaire inférieur en Tunisie : exemple de la Tunisie nord-orientale

Cited by 36 publications

References 14 publications

Seismic and well log post-Cretaceous reservoir correlations in the Sahel, east Tunisia

Seismic and well log post-Cretaceous reservoir correlations in the Sahel, east Tunisia

Investigation of groundwater mineralization in the Hammamet–Nabeul unconfined aquifer, north-eastern Tunisia: geochemical and isotopic approach

An outcrop-scale compound fault structure in the Monastir shore cliff, Central-east Tunisia

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