| Titre : |
Caractérisation et fonctionnement du système géothermique de la région Souk Ahras-Taoura par l’approche géochimique et isotopique : Algérie extrême Nord oriental |
| Type de document : |
texte imprimé |
| Auteurs : |
Yasmina Bouroubi (Née Ouadfel), Auteur ; Mounira Djebbar, Directeur de thèse |
| Editeur : |
جامعة الإخوة منتوري قسنطينة |
| Année de publication : |
2017 |
| Importance : |
183 f. |
| Format : |
30 cm. |
| Note générale : |
2 copies imprimées disponibles
|
| Langues : |
Français (fre) |
| Catégories : |
Français - Anglais
Sciences de la terre
|
| Tags : |
Evaporites multilayer system geochemistry radiogenic signature mixed système multicouche géochimie signature radiogénique mélange متبخرات نظام متعدد الطبقات جيوكيمياء بصمة إشعاعية المنشأ مزيج |
| Index. décimale : |
550 Sciences de la terre |
| Résumé : |
The main objective of this study is the knowledge the functionning of the hydrothermal Souk AhrasTaoura system in the diapirs zone of the Algerian North East, traversed by a network of conduits and
faults recent game consequently the current compression N-S (Africa-Eurasia convergence). In this
semi-arid climatic zone in its southern part, the Maastrichtian aquifer karst high demand (captured
between 146 -350m deep) is the main drinking water resource; the water is soft and fresh. The thermal
aquifer system update carbonic gas sources of brackish quality and have the emergence of gas
bubbles (CO2) and a strong smell of sulfur.
Chemical family groups and sources of water salinity of different aquifers horizons have been
identified on the basis of a geochemical study based on major elements, traces and masses (18O, 2H,
87
Sr/ 86Sr) of groundwater from different reservoirs in the basin. The hydrogeochemical analysis shows
the existence of three main groups of groundwater: the hot water, cold water and hypothermal waters.
All thermal waters are high pCO2 (0.5 to 3.5atm). They acquire their mineralization through a fluid
intake of deep origin and trade with evaporites.
The cold waters involving karstic limestone Eocene and Maastrichtian carbonate. They are weakly
mineralized waters with calcium bicarbonate geochemical facies. They only contain water infiltration.
The hyperthermal waters, mixing fresh water with thermal waters are located in some conduits of
Maastrichtian karst reservoir.
Isotopes of the water molecule (18O) and (2H) show a recharge aquifers by precipitation from water is
through the fractured limestone massifs.
The thermal waters circulates in the graben, with a high ratio 87Sr / 86 Sr (0.709007) and concentrations
(Sr> 0.1mmol.L-1) would reveal origin probably deep radiogenic.
The hyperthermal waters low levels (0.013≤ Sr ≤0.017mmol.L-1) show a mixture in variable
proportions with the hot water inflow |
| Diplôme : |
Doctorat en sciences |
| En ligne : |
../theses/sc-terre/BOU7026.pdf |
| Format de la ressource électronique : |
pdf |
| Permalink : |
index.php?lvl=notice_display&id=10573 |
Caractérisation et fonctionnement du système géothermique de la région Souk Ahras-Taoura par l’approche géochimique et isotopique : Algérie extrême Nord oriental [texte imprimé] / Yasmina Bouroubi (Née Ouadfel), Auteur ; Mounira Djebbar, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2017 . - 183 f. ; 30 cm. 2 copies imprimées disponibles
Langues : Français ( fre)
| Catégories : |
Français - Anglais
Sciences de la terre
|
| Tags : |
Evaporites multilayer system geochemistry radiogenic signature mixed système multicouche géochimie signature radiogénique mélange متبخرات نظام متعدد الطبقات جيوكيمياء بصمة إشعاعية المنشأ مزيج |
| Index. décimale : |
550 Sciences de la terre |
| Résumé : |
The main objective of this study is the knowledge the functionning of the hydrothermal Souk AhrasTaoura system in the diapirs zone of the Algerian North East, traversed by a network of conduits and
faults recent game consequently the current compression N-S (Africa-Eurasia convergence). In this
semi-arid climatic zone in its southern part, the Maastrichtian aquifer karst high demand (captured
between 146 -350m deep) is the main drinking water resource; the water is soft and fresh. The thermal
aquifer system update carbonic gas sources of brackish quality and have the emergence of gas
bubbles (CO2) and a strong smell of sulfur.
Chemical family groups and sources of water salinity of different aquifers horizons have been
identified on the basis of a geochemical study based on major elements, traces and masses (18O, 2H,
87
Sr/ 86Sr) of groundwater from different reservoirs in the basin. The hydrogeochemical analysis shows
the existence of three main groups of groundwater: the hot water, cold water and hypothermal waters.
All thermal waters are high pCO2 (0.5 to 3.5atm). They acquire their mineralization through a fluid
intake of deep origin and trade with evaporites.
The cold waters involving karstic limestone Eocene and Maastrichtian carbonate. They are weakly
mineralized waters with calcium bicarbonate geochemical facies. They only contain water infiltration.
The hyperthermal waters, mixing fresh water with thermal waters are located in some conduits of
Maastrichtian karst reservoir.
Isotopes of the water molecule (18O) and (2H) show a recharge aquifers by precipitation from water is
through the fractured limestone massifs.
The thermal waters circulates in the graben, with a high ratio 87Sr / 86 Sr (0.709007) and concentrations
(Sr> 0.1mmol.L-1) would reveal origin probably deep radiogenic.
The hyperthermal waters low levels (0.013≤ Sr ≤0.017mmol.L-1) show a mixture in variable
proportions with the hot water inflow |
| Diplôme : |
Doctorat en sciences |
| En ligne : |
../theses/sc-terre/BOU7026.pdf |
| Format de la ressource électronique : |
pdf |
| Permalink : |
index.php?lvl=notice_display&id=10573 |
|
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