【摘要】 我国西南地区(尤其是云南省)已报道岩浆型、热液型、风化型和沉积型等多种类型Co矿床/点，资源潜力很大，是我国重要的Co矿资源找矿远景区。最近，笔者在滇中地区发现了一种新类型Co矿点，钴氧化物呈粉红色-桃红色稠密浸染状、(细)脉状或团斑状等赋存于元古界硅化浅变质岩中，与石英、云母、磷灰石、碳酸盐矿物和硫化物等共生，受构造控制。这些钴氧化物主要为钴华，少量为水钴矿。地球化学分析结果显示，5件捡块样品的Co平均含量为0.23%,最高可达0.92%,同时富集Cu、As和Ni等元素；2件刻槽(1.5米/段)样品的Co含量为0.15%和0.22%。这一高品位氧化物型Co矿点的发现，具有重要的理论意义和现实价值。更多还原

【Abstract】 There are a number of reports of cobalt deposits, including magmatic, hydrothermal, weathering, and sedimentary types in SW China, particularly Yunnan Province, which makes this region as a critical player in cobalt resource exploration. Recently, the authors identified a new type of cobalt ore spot in the central Yunnan Province. This newly discovered cobalt ore spot exhibits pink-peach red cobalt oxides in Proterozoic silicified low-grade metamorphic rocks and is controlled by structure. The cobalt minerals, occurring as disseminated, fine-veined, and clustered forms, coexist with quartz, mica, apatite, carbonate minerals and sulfides. They are mainly erythrite with minor heterogenite. Chemical analyses of five collected samples yielded an average cobalt content of 0.23%, with a maximum value of 0.92%. Notably, the samples also display enrichments in elements such as copper, arsenic, and nickel. Analyses of two further grooved samples(1.5m/segment) revealed cobalt contents of 0.15% and 0.22%, respectively. The finding of this high-grade oxidized cobalt ore spot has significant theoretical implications and regional cobalt exploration.更多还原