Geochemical controls of groundwaters upwelling in saline environments: Case study the discharge playa of Sidi El Hani (Sahel, Tunisia)

Tagorti, Mohamed Ali; Essefi, Elhoucine; Touir, Jamel; Guellala, Rihab; Yaich, Chokri

doi:10.1016/j.jafrearsci.2013.05.004

Cited by 22 publications

(15 citation statements)

References 16 publications

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“…Ten drills (Figure 1(b)) recuperated from the Ministry of Agriculture (Tunisia) were also useful to see the variation of the deposition during the Messinian Salinity Crisis and to study the synsedimentary faults of Ktitir and Hajeb El Ayoun. The convergence of surrounding aquifers toward depressions was recently proven by hydrogeological [10] and geochemical [11,14] studies. Analyses of water of ten drills recuperated from data of the Ministry of Agriculture were taken to endure a geochemical study.…”

Section: Methodsmentioning

confidence: 88%

“…The geodynamic inheritance in the subsurface of this region is still until now controlling the geology of its surface. For instance, the genesis and evolution of saline depressions in the Tunisian Sahel were strongly controlled by its subsurface, which controlled their formation and evolution [1] and is still until now feeding them with huge quantities of salt through aquifers convergence toward their surfaces [8][9][10][11]. The aim in this paper is to examine the geodynamic context that controlled the genesis and evolution of saline systems in Tunisian Sahel such as the Mechertate-Chrita-Sidi El Hani system, not only during the geomorphologic shaping and real opening of their depressions but also during previous geological events that had provided a salty context to the subsurface of the Sahel area.…”

Section: Introductionmentioning

confidence: 99%

“…In doing so, this study proves the existence of a Triassic and/or Messinian salty context in the subsurface of the Sahel area that may feed depressions with salt, especially in the case of aquifers convergence. A special care was given to the Mechertate-Chrita-Sidi El Hani system where groundwater convergence [10,11], salt accumulation [11], salinization [13], and hydrocarbons migration [14] have been verified.…”

Section: Introductionmentioning

confidence: 99%

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Geodynamic Framework of Saline Systems in Eastern Tunisia: Saline Depressions Inherited from the Triassic Intrusions and/or the Messinian Salinity Crisis

et al. 2014

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Based on the geodynamic context, two hypotheses of origin of salt in the subsurface of the Sahel area are worth being defended. The first suggests that the halokinesis activities, namely, of the Triassic evaporitic sedimentation, may still be until now influencing the functioning of the saline systems in the Sahel. The second integrates the Sahel area geodynamic evolution in the framework of the convergence between African and Eurasian plates. It suggests a link between the blockage of the subduction between African and Eurasian plates in North Tunisia, the Messinian Salinity Crisis, and eventually the concrete opening and evolution of the playa during the Quaternary. Such a suggestion is materialized by a geodynamic model relating successively these events. This scenario suggests that the Messinian Salinity Crisis constituted huge quantities of salt and/or salty water. This saline subsurface reserve is until now influencing the Sahel behavior as a whole. Through groundwater convergence, huge quantities of salt are accumulated within depressions of the Sahel area. Currently, the convergence of the plate between African and Eurasian plates results in a tectonic activity within these saline systems materialized by the formation of fault spring mounds along preferential orientation ensuring the surface-subsurface connectivity.

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Section: Methodsmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Geodynamic Framework of Saline Systems in Eastern Tunisia: Saline Depressions Inherited from the Triassic Intrusions and/or the Messinian Salinity Crisis

et al. 2014

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“…The sodium has always the higher percentage than calcium and potassium with coefficient of ten as indicated in works of Tagorti et al [15,16]. Therefore, to improve the significance of the minor fraction on the identification of climatic change condition, we supposed the convolution term which has as mathematical definition the equation below:…”

Section: Study Area: the Golf Of Gabes Within A Mediterranean Sea Andmentioning

confidence: 99%

Spectral Analysis of a Core from the Sebkha of Sidi Mansour, Southern Tunisia: The Holocene Cyclostratigraphy

B¹,

B²,

Ab³

et al. 2016

J Remote Sensing & GIS

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The Milancovitch Theory explaining the ancient cyclostratigraphy does not file a case for the Holocene cyclostratigraphy. Instead, other astronomical and oceanographic mechanisms control the cyclicity within Holocene sediment. This work aimed to find out the climatic cyclicity along a core from the sebkha of Sidi Mansour located along the Mediterranean coast in Tunisia, through using different proxies: the magnetic susceptibility, carbonate percentages and chemical elements (Ca, Na, and K). Based on previous radiocarbon and tephrochrnological dating in the study area, the core was estimated to cover the two last millennia with a sedimentation rate of 0.35 mm/yr. This rate allows the elaboration of a depth-age model to carry the spectral analysis. Not all the proxies visualize the same climatic cycles. For instance, the spectral analysis of the magnetic susceptibility and Sodium data visualized a 1000 yr cycle. The spectral analysis of Potassium data did not visualize significant cycles. The spectral analysis of the carbonate percentages and calcium data visualized dual cycles of 1700-700 yr and 493-329 yr respectively. The about 500 yr and 1000 yr cycles are related to Sun activity. Other oceanographic and atmospheric factors could generate other cycles of 1700 yr, 700 yr, 493 yr, and 329 yr. The majority of these cycles were worldwide recorded as interplay between the oceanography and the solar forcing. Contrary to the earth-driven cyclostratigraphy related to orbital parameters and geographical positions, the Holocene cyclostratigraphy is sun-driven.

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“…The amount of mined underground brine has increased in recent years, despite a simultaneous decrease in groundwater level which has forced underground brine production into a depression, resulting in huge impact to the geological and ecological environment of the area. Therefore, evaluating and analyzing the underground brine resources in the southern coastal area of Laizhou Bay can contribute to the protection and rational utilization of brine resources [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Evaluation and analysis of underground brine resources in the southern coastal area of Laizhou Bay

Tian

Zhu²,

Feng

et al. 2016

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract. The southern coastal districts of Laizhou Bay are some of the most important areas for underground brine exploitation in Shandong Province. Recently, these areas have been gradually developed by the underground brine mining industry. Such economic interest has led to brine exploitation so that underground brine resources are running out. Based on this phenomenon, this study describes the supply, runoff and draining conditions of the area by collecting and organizing the background information of the studied area. Hydrogeological parameters are then calculated according to pumping tests, and the amount of sustainable resources in the coastal areas of the Southern Bank of Laizhou Bay are then calculated based on the uniform distribution of wells. Under the circumstances of underground brine mining, the exploitation potential of the underground brine is evaluated in accordance with the calculation results of exploitation quantum. Finally, suggestions are provided for the sustainable exploitation of underground brine in the area.

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Geochemical controls of groundwaters upwelling in saline environments: Case study the discharge playa of Sidi El Hani (Sahel, Tunisia)

Cited by 22 publications

References 16 publications

Geodynamic Framework of Saline Systems in Eastern Tunisia: Saline Depressions Inherited from the Triassic Intrusions and/or the Messinian Salinity Crisis

Geodynamic Framework of Saline Systems in Eastern Tunisia: Saline Depressions Inherited from the Triassic Intrusions and/or the Messinian Salinity Crisis

Spectral Analysis of a Core from the Sebkha of Sidi Mansour, Southern Tunisia: The Holocene Cyclostratigraphy

Evaluation and analysis of underground brine resources in the southern coastal area of Laizhou Bay

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