The Woumbou–Colomine–Kette district is located in the East Metallogenic Province of the Republic of Cameroon. Northeast- to E-striking splays of the regional Pan-African crustal-scale Sanaga Shear Zone control widespread gold mineralization. Gold occurs within local shear zones developed along granite-gneiss contacts, as well as within the margins of the Pan-African intrusions. Field investigations coupled with mineralogical and textural studies reveal two stages of gold mineralization. Stage 1 led to pyrite, chalcopyrite, sphalerite, pyrrhotite, bismuthinite, tellurobismuthite, galenobismuthite, and native gold deposition with quartz, sericite/muscovite, chlorite, calcite, and ankerite as gangue minerals. Stage 2 included the precipitation of pyrite, hematite, tellurobismuthite, and native gold. A SEM–CL study distinguished the two stages of quartz, as well as an early remnant barren quartz depositional stage. Two fluid inclusion assemblages (FIAs) with four types of fluid inclusions can be observed. The FIA 1 is aqueous-carbonic (±N₂±CH₄), with carbonate daughter minerals, which is related to stage 1 of the gold mineralization and composed of low salinity (~7.5 wt% NaCl equiv) H₂O-CO₂-NaCl (type 1), CO₂-rich (type 2), and H₂O-rich (type 3a) fluid inclusions. The inclusions provide evidence of episodic phase separation, with unmixing at P~2 kbar, T~300 °C, and at a paleodepth of ~7 km. The FIA 2 consists of aqueous (type 3b) fluid inclusions with a salinity of 0.2 to 11.7 wt% NaCl equiv and trapping temperatures between 205 and 245 °C. The δ¹⁸O_quartz (+11.0 to +11.7‰), δD_{fluid inclusions} (−46.2 to −40.9‰) and δ¹³C_{fluid inclusions} (−4.9 to −4.1‰) for gold-bearing quartz veins suggest a metamorphic source for the ore-forming fluids, although some contribution from the mantle and/or magmatic source(s) cannot be ruled out. The δ³⁴S (+6.5 to +7.0‰) for gold-bearing pyrites suggests a metamorphic source for the sulfur that transported gold and was involved in the precipitation of sulfide minerals. These data are consistent with a mesozonal orogenic gold deposit model for the Woumbou–Colomine–Kette district, which is an important part of the emerging greenfields exploration region for Pan-African orogenic gold and with the more significant targets defined by granite-gneiss contacts along NE- and E-striking shear zones.

Woumbou-Colomine-Kette区位于喀麦隆共和国的东部成矿省。泛非地壳规模的Sanaga剪切带的东北向电子冲击的张开控制着广泛的金矿化。黄金存在于沿花岗岩-片麻岩接触形成的局部剪切带内以及泛非侵入带边缘。现场调查与矿物学和组织学研究相结合，揭示了金矿化的两个阶段。第1阶段导致了黄铁矿，黄铜矿，闪锌矿，黄铁矿，bismuthinite，碲铋铋石，galenobismuthite和原生金沉积，其中石英，绢云母/白云母，绿泥石，方解石和无烟石为脉石矿物。第二阶段包括黄铁矿，赤铁矿，碲铋铋铁矿和天然金的沉淀。SEM-CL研究区分了石英的两个阶段以及早期残留的贫瘠石英沉积阶段。可以观察到具有四种类型的流体包裹体的两个流体包裹体组合（FIA）。FIA 1是水性碳酸盐（±N₂ ±CH ₄），与碳酸子矿物，这是关系到金矿化的阶段1和低盐度的组成（〜7.5重量％的NaCl当量）H ₂ O-CO ₂ -NaCl（1型），CO ₂ -富含（2型）和富含H ₂ O（3a型）的流体包裹体。夹杂物提供了阶段性相分离的证据，在P〜2 kbar，T〜300°C和古深度约7 km时解混。FIA 2由盐度为0.2至11.7 wt％NaCl当量且捕集温度在205至245°C之间的含水（3b型）流体包裹体组成。的δ ¹⁸ ö_石英（11.0到11.7 +‰），δD_{流体夹杂物}（-46.2至-40.9‰）和δ ¹³ C ^尽管不能排除地幔和/或岩浆来源的某些贡献，但含金石英脉的_{流体包裹体}（-4.9至-4.1‰）表明成矿流体的变质源。的δ ³⁴ S（6.5至+ 7.0‰）为含金黄铁矿表明该输送黄金和参与无机硫化物的沉淀硫变质源。这些数据与Woumbou-Colomine-Kette地区的中地带造山金矿床模型相一致，该模型是新兴的泛非造山金矿绿地勘探区的重要组成部分，并且由花岗岩-片麻岩接触定义了更重要的目标NE和E冲击剪切带。