Role of the NE-SW Hercynian Master Fault Systems and Associated Lineaments on the Structuring and Evolution of the Mesozoic and Cenozoic Basins of the Alpine Margin, Northern Tunisia

Melki, Fetheddine; Zouaghi, Taher; Chelbi, Mohamed Ben; Bédir, Mourad; Zargouni, Fouad

doi:10.5772/50145

Cited by 33 publications

(21 citation statements)

References 74 publications

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“…The overlying Numidian thrust sheet, up to 1500 m thick, is made of Chattian to Early Burdigalian turbidites that were deposited in a narrow trench from present-day Morocco to Sicily, in the southern part of the Mesoditerranean domain prior to the final collision (Riahi et al 2010). To the south of the Nappe Zone, the Dome Zone is characterized by a system of NE-SW "master faults" that are thought to have reactivated Hercynian lineaments (Melki et al 2012) ( Fig. 1).…”

Section: Regional Geologymentioning

confidence: 99%

Tectonomagmatic Context of Sedex Pb–Zn and Polymetallic Ore Deposits of the Nappe Zone Northern Tunisia, and Comparisons with MVT Deposits in the Region

Decrée

Marignac

Abidi

et al. 2016

Mineral Deposits of North Africa

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The Nefza region (Nappe Zone, northern Tunisia) is known both as a Late Miocene magmatic province and a base-metal district. In this region, small, post-nappe, continental extensional basins (Sidi Driss and (Sedex). In addition to this mineralization, the Nappe zone contains other Pb-Zn and polymetallic deposits that show similarities both to the SHMS-Sedex and MVT deposits of the Dome and Graben zones, namely the "peri-diapiric" deposits of Jebel (Jb) el Hamra, Jalta, and Jebel Ghozlane. All of the Nappe Zone deposits share common characteristics, including: (1) age-the deposits formed between late collisional events (Late Tortonian) and inception of the Early Messinian extensional regime, in the context of the Alpine Maghrebide belt formation; (2) presence of pre-existing sulphates-these were likely the main source of sulphur for the sulphides; and (3) hydrothermal systems leading to their genesisthese testify to alternating influx of cold and warm fluids. The involvement of high temperature fluids are deduced from fluid inclusion studies (Th values of 140-240°C), whereas the presence of distinctive sphalerite textures (microspherules and colloform textures) and sulphur isotopic compositions demonstrate in situ bacterial sulphate reduction, and consequently deposition at temperatures below 80°C. These data constitute unifying characteristics for these mineralizations that are in contrast to the features of Pb-Zn(-fluorite) MVT deposits occurring in the Dome and Graben zones of Tunisia. The geodynamic context prevailing during the Late Miocene in the Nappe Zone is the underlying common factor that explains the diversity of ore deposits formed at that time in this region. Most deposits are located in the vicinity of shear zones and associated lineaments inherited from the Variscan orogeny. These deep structures were reactivated by transtensional processes during the Alpine orogeny and controlled post-collisional magmatism, circulation of hydrothermal fluids, and locations of related ore deposits and showings in the Nappe Zone.

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Section: Regional Geologymentioning

confidence: 99%

Tectonomagmatic Context of Sedex Pb–Zn and Polymetallic Ore Deposits of the Nappe Zone Northern Tunisia, and Comparisons with MVT Deposits in the Region

Decrée

Marignac

Abidi

et al. 2016

Mineral Deposits of North Africa

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“…Recently, Belayouni et al (2010), Melki et al (2005Melki et al ( , 2011Melki et al ( , 2012 and Houla et al (2013) adopts the same structural architecture. However, the studies of Ben Ayed (1994) and Kadri and Ben Haj Ali (1999) adopt a structural model with N-trending faults network intersected by E-trending faults often guiding halokinetic movements.…”

Section: Discussionmentioning

confidence: 85%

“…Indeed, the Alpine compressive phase resulted from the Tethys closure and reaches its maximum during the Tortonian leading to the formation of nappes in the north-west of Tunisia (Burollet 1956;Rouvier 1977;El Euchi et al 2004;Melki et al 2012). During this phase, Bazina paleo-ridge acted as a barrier against the spread of this compression.…”

Section: Structural Settingmentioning

confidence: 96%

“…This formation presents a thickness ranging between 800 and 900 m (Melki et al 2012). The Lower Eocene limestones outcrop at the south of Bazina structure with an average thickness of 50 m witnessed by some mounds overlapping the Triassic materials ( Fig.…”

Section: Lithostratigraphymentioning

confidence: 98%

“…The southeast of Bazina Triassic structure shows a narrow NE-SW Triassic band corresponding to a section of the Ras El Korane-Thibar fault "F2"(Melki 1997;Melki et al 2012) (Figs. 1 and 5).…”

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confidence: 99%

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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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Stable Isotopes for Sustainable Management of Agricultural Water: Case of Mateur Plain (North Tunisia)

Chkir

Yermani²,

Zouari

2021

Springer Water

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Role of the NE-SW Hercynian Master Fault Systems and Associated Lineaments on the Structuring and Evolution of the Mesozoic and Cenozoic Basins of the Alpine Margin, Northern Tunisia

Cited by 33 publications

References 74 publications

Tectonomagmatic Context of Sedex Pb–Zn and Polymetallic Ore Deposits of the Nappe Zone Northern Tunisia, and Comparisons with MVT Deposits in the Region

Tectonomagmatic Context of Sedex Pb–Zn and Polymetallic Ore Deposits of the Nappe Zone Northern Tunisia, and Comparisons with MVT Deposits in the Region

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

Stable Isotopes for Sustainable Management of Agricultural Water: Case of Mateur Plain (North Tunisia)

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