【摘要】 为确定驼路沟钴矿的成矿时代与成因，利用野外地质调查、锆石U--Pb法定年对含矿建造进行了研究。结果表明，驼路沟钴矿具有同生矿床的特征，发育喷流沉积岩--硅质钠长质岩，矿化以条带状、纹层状及块状构造等同沉积矿石为特征。含矿地层变砾岩的锆石年龄组成非常复杂，跨度大，²⁰⁶Pb/²³⁸U年龄介于（469±5）～（3 014±26）Ma之间，其中最年轻的一组年龄（（469±5）Ma）代表了该变砾岩沉积成岩的时间上限。综合野外地质特征和前人研究成果可知，驼路沟钴矿为一典型的贫硫化物型热水喷流沉积矿床，形成于中—晚奥陶世原特提斯洋板块向万宝沟大洋玄武岩高原北侧俯冲的弧后裂陷环境。更多还原

【Abstract】 To reveal the metallogenic timing and genesis of Tuolugou cobalt deposit, the ore-bearing strata were studied by the methods of geological survey and zircon U--Pb dating in this study. The results show that the Tuolugou cobalt deposit has the features of syngenetic deposit with exhalative sedimentary rock of siliceous albitite, and its mineralization is characterized by the banded, lamellar and massive synsedimentary cobalt ores. The zircon U--Pb data of metaconglomerate from the ore-hosted strata is very complex and spans a wide ²⁰⁶Pb/²³⁸U age range of（469±5）to（3 014±26）Ma, among which the youngest group of ages（（469±5）Ma） defines the maximum age of deposition of the metaconglomerate. Combined with the geological characteristics and previous researches, it can be concluded that the Tuolugou cobalt deposit is a typical sulfide-poor exhalative sedimentary cobalt deposit, formed in a back-arc rift environment where the Proto--Tethys oceanic plate subducted to the north of the Wanbaogou oceanic basalt plateau during middle-late Ordovician.更多还原