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Natural Resources 2024年第1期15卷 28-50页

作者： Gambo Ranaou Noura Kamayé Tourba Karimou Dia Hantchi Bouba Hassane moussa konat. Department of Geology Faculty of Science and Techniques Abdou Moumouni University Niamey Niger Department of Geology Faculty of Science and Techniques Dan Dicko Dankoulodo University Maradi Niger

The Boulon Djounga eastern perimeter is part of the Tiawa operating permit of the Société des Mines du Liptako (SML), located in the central southwestern part of Liptako (Niger). In this study, we used field data, Reverse Circulation (RC) surveys and chemical analyzes of gold to determine the characteristics of gold and its mineralization style. The eastern perimeter of Boulon Djounga is represented by a succession of metabasalts and metasediments both intersected by intrusions of quartz and dolerite dykes, and covered by sandstone and clayey rocks. Gold is present in low contents (0.00 - 0.30 ppm) in the sedimentary cover and in medium (0.30 - 1.00 ppm) or high contents (1.00 - 4.534 ppm) in the metasediments, and in the gray quartz veins and locally in the volcanics. It exists in a disseminated state or in a concentrated state in the surrounding areas in the form of discrete grains associated with sulphurous minerals (pyrite: FeS2, chalcopyrite: CuFeS2 or arsenopyrite: FeAsS). The presence of gold in the quartz veins, and the NE-SW and NW-SE orientations of the ore bodies suggest that the eastern Boulon Djounga gold mineralization would be established during a late magmatic extensive phase.

关键词： Liptako Gold Mineralization Metasediments-Volcanics Quartz Veins Sulphurous Minerals Niger

Hydrogeophysical and Structural Investigations Using VES: A Case Study of Dosso Region in the Southwestern Part of the Meso-Cenozoic Iullemmeden Basin (Southwestern Niger)

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Open Journal of Geology 2024年第1期14卷 50-80页

作者： Abdou Ali Ibrahim Huguette C. Emvoutou Alain Zanga konat. moussa Serigne Faye Department of Life and Earth Sciences Ecole Normale Supérieure Université Abdou Moumouni Niamey Niger Department of Earth Sciences Faculty of Sciences University of Douala Douala Cameroon Department of Geology Faculty of Sciences and Techniques University Cheikh Anta Diop of Dakar Dakar Senegal Department of Geology Faculty of Sciences and Techniques Université Abdou Moumouni Niamey Niger

A regional study connecting geolelectrical surveys with geology and hydrogeology was carried out in the western part of the Iullemmeden basin, precisely in the Dosso region in Niger. One hundred and four (104) vertical electrical sounds have been realized, among them nineteen representative were thus be used as parametric surveys. The local resistivity values of the geological formations of Quaternary range from 100 Ω⋅m to 1000 Ω⋅m (sands and lateritic sandstones). The Oligo-Miocene formation of the Continental terminal (Ct) shows resistivity values ranging from 1 to 5 Ω⋅m (brackish groundwaters) to 1500 Ω⋅m (clay sandstones) while the Upper Cretaceous formation of the Continental “hamadien” (Ch) indicates values ranging from 20 Ω⋅m (sandy clay) to 5000 Ω⋅m (clayey sandstones). The geological formations of Paleocene have values from 2 Ω⋅m (marls) to 60 Ω⋅m (calcareous marl), while the Precambrian basement exhibits values of granite around 300 Ω⋅m to 60,000 Ω⋅m. The update of the structural settings reveals many faults in the study area which explain both the shape of the basin and the geometry of the aquifers. Tectonics is also consistent with the hydraulic characteristics of aquifers. In addition, brackish groundwaters were identified as perched aquifer groundwaters in different depths in Dosso region. They probably come from the marine brines during the regression of the Paleocene Sea.

关键词： Vertical Electrical Soundings Continental Terminal Continental “Hamadien” Brackish Groundwaters Iullemmeden Basin Dosso Region

Photovoltaic waste management in sub-Saharan Africa:current practices in Burkina Faso

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Waste Disposal and Sustainable Energy 2024年第2期6卷 271-282页

作者： Kodami Badza Yrebegnan moussa Soro Marie Sawadogo Laboratoire Energies Renouvelables et EfficacitéEnergétique Institut International d'Ingenierie de I'Eau et de I'Environnement(2iE)01 BP 594 OuagadougouBurkina Faso

Sub-Saharan Africa is witnessing a proliferation of photovoltaic(PV)waste due to the increasing number of solar PV power *** waste(panels,batteries,electrical cables,mounting structures,and inverters)consists of elements such as mercury,cadmium,chromium,lead,copper,aluminum,fluorinated compounds,and plastics that are toxic to human health and the environment if a proper management system is not *** many studies worldwide have focused on PV waste management,very few have been conducted in sub-Saharan *** study aims to investigate the current PV waste management system in Burkina Faso,determine stakeholder profiles,and propose strategies to enhance the existing *** research,interviews,questionnaires,and field visits were used in the *** survey showed that young people,mainly under 30 years of age and with a primary education,dominate(70%)in terms of PV waste collection and repair activities,while the more technical recycling and export activities are carried out mainly(88%)by stakeholders older than 40 years and with a secondary education(60%).Among the older stakeholders,100%are aware of the hazardous nature of PV waste,whereas 36%are young *** an environmental perspective,the main source of contamination observed is the release of lead-rich sulfuric acids into water and soil during the collection and repair *** the recycling of batteries and electrical cables,toxic fumes are emitted into the air,and recycling residues rich in toxic substances are *** reduce risks to human health and the environment when managing PV waste,the introduction of legislation,the multiplication of collection points and appropriate infrastructures,the training and awareness-raising of stakeholders,and the extended responsibility of manufacturers are *** on the economic feasibility of setting up formal management structures are needed to complete this work.

关键词： Photovoltaic waste Sub-Saharan Africa Waste management Recycling Batteries Incineration

Exoscopy of Detrital Zircons from Niamey Neoproterozoic Sandstones (Eastern Edge of the West African Craton, Southwestern Niger): Interpretation of Detrital Sediments Provenance

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Open Journal of Geology 2024年第5期14卷 617-628页

作者： Hassan Ibrahim Maharou Karimou Laouali Idi Diafarou Alzouma Amadou Salissou Abdoul Ganiou Amadou Gnissa Sidibé moussa konat. Department of Geology Faculty of Science and Techniques Abdou Moumouni University Niamey Niger Department of Life and Earth Sciences Ecole Normale Sup&#233rieure (ENS) Abdou Moumouni University Niamey Niger

This study focuses on exoscopic analyses of detrital zircon grains of Archean and Paleoproterozoic age, contained in the sediments from the Niamey Neoproterozoic sandstones (Niamey region), with a view to confirming the sediments sources already proposed (Kénéma-Man domain for Archean-age zircons and Baoulé Mossi domain for Paleoproterozoic-age zircons). Exoscopic analysis reveals that Archean zircon grains are more corroded, with rounded to sub-rounded shapes, while Paleoproterozoic zircon grains are less corroded and mostly angular in shape. The strong corrosion of Archean zircon grains, implying long-distance transport, is consistent with the remoteness of the Kenema-Man domain which are the source these sediments. The fact that the Paleoproterozoic zircon grains show little or no wear implies a proximal source of sediments, corresponding to the Baoulé Mossi domain.

关键词： Exoscopic Analysis Detrial Zircon Grains U-Pb Ages Niamey Neoproterozoic Sandstones Niamey Region

Tectonic Style Associated with the Doleritic Dykes of the Téra-Ayorou Pluton (Liptako, Western Niger)

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International Journal of Geosciences 2024年第8期15卷 567-581页

作者： Kamayé Tourba Gambo Ranaou Noura Abdou Dodo Bohari Karimou Dia Hantchi Mallam Mamane Hallarou Hassane Ibrahim Maharou Yacouba Ahmed moussa konat. Groundwater and Georesources Laboratory Department of Geology Abdou Moumouni University Niamey Niger UMR of Water Sciences Mineral Resources Uses and Management Dan Dicko Dankoulodo University Maradi Niger

The doleritic dykes present in the Téra-Ayorou pluton crosscut the basement of the Nigerien Liptako and are part of the system of intrusive mafic dykes in the Paleoproterozoic domain of the Léo-Man ridge. In the previous work, emphasis was placed on the petrology, geochemistry and geochronology of the Liptako doleritic dykes. This study aims to analyze the tectonic style of intrusive doleritic dykes in the Téra-Ayorou pluton. The characterization of the deformation which affected the doleritic dykes of the Téra-Ayorou pluton is important for the evaluation of their economic potential. To this end, measurements of tectonic structure planes were taken in the field, and samples were taken from the chilled margin and cores of dolerite dykes, before being processed in the laboratory. Analysis of the tectonic structures collected revealed a brittle tectonic pattern, characterizing a phase of deformation subdivided into two episodes D1 and D2. Episode D1, with its subvertically dipping normal faults and simple N70˚ - N110˚ fractures, is compatible with N-S extension. On the other hand, episode D2, which created shear corridors by reactivation of pre-existing fractures and oriented N150˚ - N170˚, is associated with a WSW-ENE extension. These results open up prospects for the exploration of gold, uranium mineralization and diamonds in the north-west of Niger.

关键词： Dolerite Dykes Associated Structures Deformation Phases North Liptako Niger

Bilharzia Appendicitis: Incidence in a Commune in Mali, about 3CAS

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Surgical Science 2024年第5期15卷 321-329页

作者： Souleymane Bingue Dembélé Yely Dianessy moussa Samake Abdou Guiré Siaka konat. Ousmane Sy Boubacar Yoro Sidibé Amadou Maïga Thiorno Nadio Boubacar Karembe Amaguiré Saye Sirama Diarra Dorcas Sodjiné Yede Issiaka Diarra Ibrahima Maiga Mahamane Dicko moussa konat. Aliou Bina Diarra Bakary Tientigui Dembélé General Surgery Department of the District Hospital of Commune IV of Bamako Bamako Mali Kolondié ba Reference Health Centre Sikasso Mali Epidemiology and Clinical Research Bamako Mali General Surgery Department of Gabriel Touré University Hospital Bamako Mali Ophthalmology Department of the District Hospital of Commune IV of Bamako Bamako Mali Gynecology and Obstetrics Department of the District Hospital of Commune IV of Bamako Bamako Mali Commune I of the District of Bamako Reference Health Centre Bamako Mali Imaging Department of the District Hospital of Commune IV of Bamako Bamako Mali Commune VI of the District of Bamako Reference Health Centre Bamako Mali Anotomy-Pathology Department of the G Point University Hospital Bamako Mali

Appendicitis bilharzia is a very rare condition and we report 3 cases of this pathology that sense clinical and biological similarities with bacterial appendicitis. The etiological diagnosis was exclusively histopathological, this allowed to highlight eggs of Schistosome in the appendicular wall in the three patients. The surgical treatment was supplemented by a specific medical treatment based on praziquantel. The surgical suites were simple for 2 patients, complicated by superficial parietal suppuration in a patient.

关键词： Bilharzial Appendicitis Endemic Histopathology Specific Antiparasitic Treatment

Resistant Pulmonary TB-HIV Co-Infection in an Infant: About a Case

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Open Journal of Pediatrics 2024年第2期14卷 420-425页

作者： Mariam Maiga Pierre Togo Tati Simaga Mariam Traoré moussa konat. Mamadou Diallo Alou Samaké Mamadou Keïta Korotoumou Wélé Diallo Djibril Kassogué Pediatrics Department Distric VI Reference Health Center Bamako Mali Paediatrics Department Gabriel Touré Teaching Hospital Bamako Mali Pediatrics Department Mali Hospital Bamako Mali Paediatrics Department Timbuktu Regional Hospital Bamako Mali

Diagnosis of childhood tuberculosis (TB) is difficult, especially in resource-limited countries where the number of reported cases of TB-HIV co-infection continues to rise. This co-infection poses a diagnostic and therapeutic problem for caregivers. We report a case of rifampicin-resistant HIV-TB pulmonary coinfection in a 19-month-old infant.

关键词： Tuberculosis Rifampicin Resistance HIV Infants

Serological Profile of Hepatitis D Virus (Hepatitis Delta) in the Hepato-Gastro-Enterology Department of Chu Gabriel Toure

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Open Journal of Gastroenterology 2024年第3期14卷 93-98页

作者： Sanra Déborah Sanogo Kadiatou Doumbia Hourouma Sow moussa Younoussou Dicko Youssouf Oumarou Abdoulaye Berthé Sabine Drabo Luc Sidibé Makan Siré Tounkara Abdoulaye Maiga Ouatou Mallé Ganda Soumaré Anselme konat. moussa Tièmoko Diarra Hepato-Gastroenterology Department CHU Point G Bamako Mali Hepato-Gastroenterology Department CHU Gabriel Touré Bamako Mali Department of Internal Medicine Centre Hospitalier Universitaire Communautaire de Bangui Bangui Central African Republic

Infection with the defective hepatitis D virus (HDV) co-infects or superinfects a patient carrying hepatitis B virus (HBV). Delta virus infection is relatively common. The seriousness of infection with the hepatitis D virus (HDV), a virus defective in a patient carrying the hepatitis B virus (HBV), lies in its aggravating effect on the associated viral hepatitis B. Our aim was to study the serological profile of HDV in HBsAg-positive patients. As this study was fragmentary, we initiated this study with the aim of investigating the serological profile of HDV in HBsAg-positive patients. This was a descriptive and analytical cross-sectional study that ran from March 2019 to February 2020, a 12-month period. It focused on the population of patients seen and screened positive for HBsAg. We obtained a frequency of 10%. The mean age of our patients was 41.8 ± 13.09 years. The sex ratio was 4.5. VHD RNA was detected in 50% of patients. In 100% of cases, the presence of VHD RNA was associated with advanced fibrosis according to the APRI score, but without any statistically significant link. All HBV-infected patients should be screened for anti-HDV Ac. HDV infection leads to rapid progression to complications of liver disease.

关键词： HBsAg VHD RNA Liver Disease

Anal Pathologies: What Management at the Reference Health Center of Bamako’s Commune V?

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Open Journal of Gastroenterology 2024年第3期14卷 87-92页

作者： Sanra Déborah Sanogo moussa Y. Dicko Ousmane Diarra Abou A. Diarra Drissa Katilé Abdoulaye Maiga Ouatou Mallé Sabine Drabo Makan S. Tounkara Hourouma Sow Kadiatou Doumbia Anselme konat. moussa T. Diarra Hepato-Gastroenterology Department CHU Point G Bamako Mali Service d’hépato-gastroentérologie CHU Gabriel Touré Bamako Mali Hepato-Gastroenterology Unit CSREF Commune V Bamako Mali

Anal pathologies are conditions affecting the anal margin and the anal canal. The aim of our study was to update data on anal diseases. Non-specific, it can reveal an emergency, a serious illness, a chronic disease or a benign condition. It was a prospective, descriptive and analytical study from April 2022 to March 2023, carried out in the hepato-gastroenterology unit of the Centre de Santé de Référence de la commune V du District de Bamako in Mali. Out of seven hundred and forty-nine (749) patients seen in consultation, 98 had anal pathology, i.e. a prevalence of 13.08%. The mean age was 40 ± 15.15 years and the sex ratio was 1.5. Hemorrhoidal disease and anal fissure were the most frequent pathologies in 66.4% and 24.4% of cases respectively. Medical treatment was initiated in 91.9% of patients with hemorrhoidal disease and 91.7% with anal fissure. Anal pathologies are common in young male patients. In our context, they are dominated by benign conditions.

关键词： Anal Pathologies Hemorrhoidal Disease Anal Fissure

Chronic Hepatitis B Virus Infection: Biological Parameters in Patients Treated with Tenofovir Disoproxil Fumarate

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Open Journal of Gastroenterology 2024年第4期14卷 145-151页

作者： Sanra Déborah Sanogo moussa Y. Dicko Lamine N’Diaye Ousmane Diarra Drissa Katilé Abdoulaye Maiga Ouatou Mallé Sabine Drabo Makan S. Tounkara Hourouma Sow Kadiatou Doumbia Anselme konat. moussa T. Diarra Hepato-Gastroenterology Department Centre Hospitalier Universitaire Du Point G Bamako Mali Hepato-Gastroenterology Department Gabriel Toure University Hospital Bamako Mali Hepato-Gastroenterology Unit Csref Commune V Bamako Mali

Chronic hepatitis B causes a liver disease characterized by inflammation of the liver parenchyma. The aim of this study was to investigate the evolution of biological parameters in patients treated with Tenofovir for chronic B infection at the Commune V referral health center in Bamako. We obtained a prevalence of 14.15%. The most represented age group was 31 - 40 years, with 36.8%. The sex ratio was 1.44 in favour of men. Viral load was undetectable after 18 months of treatment in 25 patients (42.37%). Tenofovir, the 1st-line drug in Mali, is effective on the biological parameters monitored in patients.

关键词： Viral Hepatitis B Tenofovir Biological Parameters