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Petrographic and Structural Studies of the Guintéguéla Formations (Northwest of Côte d’Ivoire)

Open Journal of Geology 2024年第1期14卷 29-49页

作者： Mohamed Samuel Moriah Conte N’guessan Nestor Houssou Oumar Barou Kaba Mohamed Lamine Timite Abdoulaye Kadiatou Diallo aly soumah Mohamed Camara Mohamed Fofana Djibril M’Mamy Camara Applied Research Laboratory Fundamental Geology and Prospecting Research Unit Emergent Centre Mines and Society Higher Institute of Mines and Geology of Boké Boké Republic of Guinea Laboratory of Geology and Energy Resources (LGRME) UFR of Earth Sciences and Mineral Resources University Felix Houphouet Boigny Abidjan Republic of Ivory Coast Applicated Research Laboratory Mining and Resource Development Research Unit Emergent Centre for Mines and Society Higher Institute of Mines and Geology of Boké Boké Republic of Guinea

Côte d’Ivoire is currently experiencing strong growth in the mining sector. Identifying the formations present in our subsoil is therefore essential for mining recovery. It is in this context that we conducted studies on the formations present in the locality of Guintéguéla. It is located in the northwest of Côte d’Ivoire in the bafing region. The aim of this work was to determine the petrographic and structural characteristics of the formations of the area. The methodology began with documentation and then followed petrography and structural analysis work on the macroscopic and microscopic levels. We observed six groups of rocks: granitoids, amphibolites, orthogneiss, quartzites (poor and rich in magnetites), volcano-sediments and filonian rocks. Metamorphism is of amphibolite to granulite facies. However, volcano-sediments must be associated with the green schist facies. With regard to the structural, structures and microstructures such as foliation;fractures;sigmoidal figures reveal that the studied area was affected by ductile and also brittle tectonics whose main directions are oriented along the shear corridor, so N-S to NNW-SSE.

关键词： Mining Petrography Structural Metamorphism

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Petrological and Statistical Studies of the Limbiko Bauxite Deposit, Republic of Guinea

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International Journal of Geosciences 2023年第4期14卷 351-376页

作者： Abdoulaye Kadiatou Diallo Mohamed Samuel Moriah Conte Oumar Barou Kaba aly soumah Mohamed Camara Laboratory for Applied Research (LAR) Fundamental Geology and Prospection Research Unit (FGPRU) Emerging Centre for Mines and Society (ECMS) of the Institute Superior of Mines and Geology of Boke (ISMGB) Boké Republic of Guinea Laboratory for Applied Research (LAR) Research Unit Mining and Resource Development (RUMRD) Emerging Centre for Mines and Society (ECMS) of the Institute Superior of Mines and Geology of Boke (ISMGB) Boké Republic of Guinea

The increasing demand for Aluminium pushes the miners to multiply the research in order to answer this demand. The objective of this work is to characterize the bauxitic deposit of Limbiko. The methodology consists in collecting samples, and establishing stratigraphic logs, sections and geological maps. The analyses were carried out in the laboratory of the Company des Bauxites de Guinea. Statistical methods were used to process the geochemical data. The study area is characterized by sedimentary formations of the Devonian, in which the dolerites of the Mesozoic were injected. It is on these Devonian and Mesozoic formations that the Limbiko bauxite deposit was developed. The stratigraphic logs show the succession of formations. The parent rock is surmounted by an alteration crust. The petrographic study is based on the bauxitic and transitional zones characterized by ferruginous laterites. Both zones contain some ferriplantite. Mineralogical analysis shows the presence of gibbsite, goethite, alumogoethite, rutile and clay minerals. The geochemical study of the major elements shows that the more the contents of SiO2, Fe2O3 decrease, the more the content of Al2O3 increases and those of TiO2, Al2O3 increase in the same direction. The PCA confirms the mineralogical results by classifying the samples into clay, bauxite and ferrite.

关键词： Bauxite Alteration Crust Aleuro-Argillite Dolerite Gibbsite

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Immunovirological Discordance and Associated Factors among People Living with HIV under Antiretroviral Treatment at Hôpital de Jour de Donka, Guinea

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Open Journal of Medical Microbiology 2024年第2期14卷 93-104页

作者： Mariama Sadjo Diallo Djiba Kaba Charles Tchibinda Delicat Issiaga Diallo Boh Fanta Diane Doufin Traore Ousmane Niabaly Oumar Mouctar Diallo Ouo-Ouo Yaramon Kolie aly Patrice Kamano Pascal Koivogui Ahmed Sékou Keita Mohamed Macire soumah Thierno Mamadou Tounkara Mohamed Cisse Facult des Sciences et Techniques de la Sant Universit Gamal Abdel Nasser de Conakry Conakry Guine Laboratoire de Biologie Molculaire Nestor Bangoura/Helene Labrousse Hpital de Jour Donka CHU Donka Conakry Guine Centre dExcellence Africain Pour la Prvention et le Contrle des Maladies Transmissibles Conakry Guine Service de Dermatologie-Vnrologie CHU Donka Conakry Guine

The antiretroviral treatment (ART) has significantly reduced the number of new HIV/AIDS infections and related deaths. However, cases of immunovirological discordance (IVD) are found in various locations. The objective of this study was to determine the profile of People living with HIV (PLHIV) with IVD and to identify associated factors. We conducted a cross-sectional study based on the records of PLHIV under ART for at least 6 months, followed at Hpital de Jour Donka from 2015 to 2017, and having both viral load (CV) and CD4 T-cell count. Prevalence of IVD was 34.57%, with 23.87% for immunological discordance (ID) and 10.7% for virological discordance (VD). Females were predominant (66.26%), and male gender influenced IVD with a statistically significant difference (p = 0.006) and was associated with VD (p = 0.007). The average age was 38.77 11.30 years. PLHIV were classified at WHO stages 3 and 4 (86.01%). The median initial haemoglobin level was 11.5 g/L [3.2 - 12]. The mean initial CD4 T-cell count was 272.84 cells/mm3 201.6. The median initial viral load (VL) was 147,337 copies/mL [1092 - 31,675,000]. The initial CD4 T-cell count 3 was associated with IVD with a statistically significant difference (p = 0.0009) and correlated with ID (p = 0.000). Prurigo was associated with IVD with a statistically significant difference (p = 0.003). Cerebral toxoplasmosis was not associated with IVD but was associated with ID (p = 0.04). This study allowed us to describe the profile of PLHIV with IVD. The main associated factors were male gender, initial CD4 T-cell count 3, toxoplasmosis, prurigo, and herpes zoster.

关键词： HIV Antiretroviral Treatment (ART) Immunovirological Discordance Donka Guinea

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