Structural Controls and Predictive Mapping of Tin, Niobium and Tantalum Mineralization Associated with the Mayo Darlé Stanniferous Granitoids;Contributions of Geostatistics  

作　　者：Bah-Yero Liman Ngounouno Ismaïla Mbowou Gbambié Isaac Bertrand Alpha Baster Kenfack Fokem André William Boroh Amadou Diguim Kepnamou Bah-Yero Liman;Ngounouno Ismaïla;Mbowou Gbambié Isaac Bertrand;Alpha Baster Kenfack Fokem;André William Boroh;Amadou Diguim Kepnamou(Department of Earth Sciences, Faculty of Science, University of Ngaoundéré, Ngaoundéré, Cameroon;Department of Mining Geology, School of Geology and Mining and Engineering, University of Ngaoundéré, Meiganga, Cameroon;Department of Earth Sciences, Faculty of Science, University of Garoua, Garoua, Cameroon)

机构地区：[1]Department of Earth Sciences, Faculty of Science, University of Ngaoundéré, Ngaoundéré, Cameroon [2]Department of Mining Geology, School of Geology and Mining and Engineering, University of Ngaoundéré, Meiganga, Cameroon [3]Department of Earth Sciences, Faculty of Science, University of Garoua, Garoua, Cameroon

出　　处：《Journal of Geoscience and Environment Protection》2024年第1期180-210,共31页地球科学和环境保护期刊（英文）

摘　　要：The aim of this study of the spatial dispersion of tin, niobium and tantalum mineralization associated with the Mayo Darlé granitoids was to produce prospecting guides through predictive maps of Sn, Nb and Ta in the region. It was based on a database (in appendix) obtained after analysis of rock samples (greisens and quartz veins) collected in the field, using a portable X-ray fluorescence (XRF) spectrometer. Two approaches were used: 1) structural studies in the field using the directions of veins and fractures 2) the use of variographic maps, an essential element in geostatistics for determining directional anisotropies. A joint synthesis of the modelling results shows that tin, tantalum and niobium mineralization at Mayo Darlé is concentrated along strike intervals N315E to N320E, with mineralization also occurring along strike N35E for high-grade Sn, medium-grade Ta and low-grade Nb. In short, mineral concentrations disperse progressively in space: positively from east to west for tantalum and niobium, and inversely for tin.The aim of this study of the spatial dispersion of tin, niobium and tantalum mineralization associated with the Mayo Darlé granitoids was to produce prospecting guides through predictive maps of Sn, Nb and Ta in the region. It was based on a database (in appendix) obtained after analysis of rock samples (greisens and quartz veins) collected in the field, using a portable X-ray fluorescence (XRF) spectrometer. Two approaches were used: 1) structural studies in the field using the directions of veins and fractures 2) the use of variographic maps, an essential element in geostatistics for determining directional anisotropies. A joint synthesis of the modelling results shows that tin, tantalum and niobium mineralization at Mayo Darlé is concentrated along strike intervals N315E to N320E, with mineralization also occurring along strike N35E for high-grade Sn, medium-grade Ta and low-grade Nb. In short, mineral concentrations disperse progressively in space: positively from east to west for tantalum and niobium, and inversely for tin.

关 键 词：Mayo Darlé TIN NIOBIUM Tantalum GEOSTATISTICS MAPPING 

分 类 号：TG1[金属学及工艺—金属学]