The Natitingou area within the Atacora Structural Unit (ASU) of the Pan-African Dahomeyide orogenic belt, northwestern Bénin, is characterized by the monocyclic metasedimentary formations, amphibolites and orthogneisses which belong to the Internal zone of the belt. Representative samples of these different gold-bearing rocks have been analyzed geochemically to determine their petrogenesis, mode of emplacement, tectonic setting and role in the genesis of gold mineralization in the area. The orthogneisses are subalkaline, peraluminous and emplaced in a syn-collisional arc setting while the amphibolites are metaluminous, tholeiitic with an E-MORB affinity and emplaced in a rifted lithospheric setting. The metasedimentary rocks, comprising quartzites and mica schists are cross-cut by auriferous quartz veins. The metasedimentary rocks are recycled sediments varying from wackes to sublitharenite in composition and deposited in a passive margin setting. The quartz veins similar to the metasedimentary rocks are enriched in LREE, depleted in HREE and showed a negative Eu-anomaly (0.31–0.72). Their chondrite-normalised REE patterns deciphered them as Upper Continental Crustal materials which were probably derived from the reworking of their host metasedimentary rocks. Gold concentration in quartzites, amphibolites, mica schists, quartz veins and orthogneiss were 0.004–9.587, 0.26–1.76, 0.0005–0.464, 0.023–0.147 and 0.0−0.0005 ppm, respectively. Devolatilization process of the country-rocks, is the most probable mechanism for the ore-forming fluid, which could have been generated during the Pan-African Dahomeyide event. Remobilisation of gold and associated metal (As, W, Cu, Mo, Sb, and Sn) after the Pan-African Dahomeyide orogeny is suggested for enrichment of gold along shear and fault zones of the Natitingou area.

位于贝宁西北部的泛非达荷美德造山带阿塔科拉构造单元 (ASU) 内的纳蒂廷古地区的特征是单环变沉积地层、角闪岩和正方麻岩，属于该带的内部区域。对这些不同含金岩石的代表性样品进行了地球化学分析，以确定它们的岩石成因、就位方式、构造环境以及在该地区金矿化成因中的作用。正方麻岩为亚碱性、过铝质并位于同碰撞弧环境中，而角闪岩为金属铝质、拉斑岩，具有 E-MORB 亲和性，并位于裂谷岩石圈环境中。由石英岩和云母片岩组成的变沉积岩被含金石英脉横切。变质沉积岩是循环沉积物，成分从瓦克到亚斜纹岩不等，沉积在被动边缘环境中。与变质沉积岩相似的石英脉富集轻稀土，贫重稀土，Eu-异常（0.31-0.72）。它们的球粒陨石归一化 REE 模式将它们解读为上大陆地壳材料，可能来自其寄主变质沉积岩的再加工。石英岩、角闪岩、云母片岩、石英脉和正方麻岩中的金浓度分别为 0.004-9.587、0.26-1.76、0.0005-0.464、0.023-0.147 和 0.0-0.0005 ppm。围岩的脱挥发分过程是最可能的成矿流体机制，它可能是在泛非达荷美德事件中产生的。