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Geochemistry and Mineralogy of the Upper Cretaceous-Paleocene Marine Series, Iullemmeden Basin, Niger Republic

Journal of Geoscience and Environment Protection 2019年第12期7卷 1-19页

作者： Moumouni Ali ibrahim wagani Mohammed S. Chaanda Département de Géologie Faculté des Sciences et Techniques Université Dan Dicko Dankoulodo Maradi Niger Republic School of Geography Earth & Environmental Sciences University of Plymouth Drake Circus UK

Major and trace elements, mineralogy as well as the total organic content of the Upper Cretaceous-Paleocene Marine Series of the Iullemmeden basin in Niger were determined in order to assess their composition, the chemistry of the paleoenvironment and the nature of the parent crystalline rocks that they evolved from. The major and trace elements were analyzed using a Bruker Tracer IV energy-dispersive hand held X-ray fluorescence spectrometer, the mineralogical analyses were done using a Bruker AXS D8 Discover, while the total organic carbon was calculated by subtraction of inorganic carbon from the total carbon, determined using a CM5014 coulometer (UIC, Joliet, IL, USA) and a LECO SC-144DR instrument. Geochemical indices calculated from major oxides such as CIA, PIA, ICV and CIW have been computed and the results show that the Marine Series are made essentially of clay minerals of the smectite group (montmorillonite), quartz and other accessory minerals like rutile and calcite. Computed ratios of some trace elements such as V/(V + Ni) and V/(V + Cr) showed that the paleoenvironment was dysoxic-oxic and the low values (<2) of the Total Organic Carbon found in the sediments are justified by those poor preservative conditions. Based on Al2O3/TiO2 ratios, the sediments were derived from intermediate to acidic igneous rocks surrounding the basin.

关键词： Geochemistry and Mineralogy

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Groundwater Quality Surroundings Mining Activities Areas in Arlit Region(Tim MersoïBasin,North Niger)

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Journal of Environmental Science and Engineering(B) 2023年第6期12卷 257-264页

作者： Illias Alhassane Abdou Babaye Maman Sani Issa MSalmanou Souleymane wagani ibrahim Department of Geology Faculty of Science and TechniquesAgadez UniversityAgadez 199Niger Department of Geology UMR SERMUGFaculty of Science and TechniquesDan Dicko Dankouloudou UniversityMaradi 465Niger Department of Geology and Environment Faculty of Sciences and TechniquesZinder UniversityZinder 656Niger

The study area is a semi-arid area located in the Arlit *** area contains significant uranium deposits that have been mined by two mining companies since *** objective of this study is to determine the impact of these activities on existing aquifers,in particular Izegouande aquifer.A methodological approach based on hydrochemical methods focusing on the analysis of nitrates and sulfates showed that waters of Izegouande aquifer have high nitrate concentrations ranging from 16 mg/L to 60 mg/L,higher than WHO(World Health Organization)standards drinking *** addition,these waters show elevated sulfate levels ranging from 16 mg/L to 57 mg/L,therefore *** high concentrations of nitrates and sulfates are located mainly near wastewater treatment of Arlit city and near industrial zone,which are potential areas for transfer of these elements such as nitrates and *** is therefore urgent to carry out periodic and regular checks on groundwater in these areas.

关键词： Groundwater quality mining impacts nitrates sulfates,Arlit,Niger

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Application of Spatial Techniques for the Identification of Discontinuous Aquifers of the Basement in Semi-Arid Environment: A Case of Bagzan Mount Plateau, Aïr Massif (North, Niger)

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Journal of Water Resource and Protection 2023年第11期15卷 581-596页

作者： Illias Alhassane Abdou Babaye Maman Sani Issa Malan S. Souleymane ibrahim wagani Department of Geology Faculty of Science and Techniques Agadez University Agadez Niger Department of Geology UMR SERMUG Faculty of Science and Techniques Dan Dicko Dankoulodo University Maradi Niger Department of Geology and Environment Faculty of Sciences and Techniques Zinder University Zinder Niger

Bagzan mount is located in the Aïr massifs region. This locality, which is constituted only by the granites and volcanic formations, knows the difficulty of water supply that depends on rainfall. This present study has the objective of fracture mapping that allowed to the fractured aquifer in Bagzan mount. The methodological approach used has a treatment of Digital Elevation Model (DEM imagery), hydrogeological and geological approach in the field. This process allowed us to map the lineaments and elaborate a fracturing map after the validation stage. The fracturing map showed that the fractures network is distributed in the N70°-N80°, N60°-N70°, N50°-N60°, and two secondary directions N90°-N100° and N120°-N140°. These fracturing maps allowed us to have precious information in groundwater research in Bagzan mount, due to their geological and hydrogeological complexity.

关键词： Fractured Aquifers Remote Sensing Basement Bagzan Niger

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Multi-Criteria Analysis Using Remote Sensing and GIS: Insight into Groundwater Potential of the Fissured Aquifers in the Liptako Socle (Southwestern Niger)

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Journal of Water Resource and Protection 2021年第11期13卷 881-899页

作者： Maman Sani Abdou Babaye Karimou Dia Hantchi ibrahim wagani Boukari Issoufou Ousmane Issoufou Sandao Department of Geology UMR SERMUG Faculty of Science and Techniques Dan Dicko Dankoulodo University Maradi Niger Department of Geology Faculty of Science and Techniques Abdou Moumouni University Niamey Niger

In the basement of southwestern Niger, weathering and fractured zones concentrate most of the groundwater. This study focuses on fractured media and aims to identify areas of productivity in this aquifer to improve the region’s water coverage. The cartographic approach developed made it possible to establish synthetic maps based on multi-criteria analysis. The hydrogeological parameters selected include fracturing data, drainage system, slope and piezometric level as well as shallow and deep lithology. The choice of these criteria is based on their physical meaning but also on the availability of data. The integration of all the criteria in a GIS allowed to generate maps of recharge and potential productivity of fractured aquifers in the area. The validation of these thematic maps with independent data confirms their utility as reference standards for accessibility for future resource exploitation. Like any spatialization tool, potential recharge maps will provide valuable information about areas where infiltration is more important, and help control and manage risk zoning. The upward evacuation effect is even more prominent along the lineaments, faults or fractures: thus, to avoid possible pollution and to locate the future hydraulic structures, the analysis of the potential recharge zones remains necessary. The potential productivity index map, in addition to the very punctual sites identified by the fracturing study, made it possible to define areas of high potential productivity.

关键词： Multi-Criteria Analysis Fissured Aquifers Productivity Groundwater Potential Niger

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