Characteristics of Gold and Its Mineralization Style in the Boulon Djounga Eastern Perimeter of Liptako Mining Company (Central Southwestern Niger)  

作　　者：Gambo Ranaou Noura Kamayé Tourba Karimou Dia Hantchi Bouba Hassane Moussa Konaté Gambo Ranaou Noura;Kamayé Tourba;Karimou Dia Hantchi;Bouba Hassane;Moussa Konaté(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)

机构地区：[1]Department of Geology, Faculty of Science and Techniques, Abdou Moumouni University, Niamey, Niger [2]Department of Geology, Faculty of Science and Techniques, Dan Dicko Dankoulodo University, Maradi, Niger

出　　处：《Natural Resources》2024年第1期28-50,共23页自然资源（英文）

摘　　要：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.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 

分 类 号：P61[天文地球—矿床学]