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通过对黔北下寒武统黑色岩系的地质和地球化学分析,结合前人研究成果,探讨了黑色岩系元素赋存状态及富集模式。黑色岩系富含有机质,粘土矿物成分高,Ni-Mo矿层以硫化物矿物为主,表明元素赋存状态主要为硫化物态、有机质结合态和粘土矿物吸附态等,但各个元素的赋存状态有所不同。黑色岩系多元素富集层是贵金属元素、稀土元素和其他微量元素的富集体,富集系数高。黑色岩系多元素的异常富集是古地理环境、构造运动、热液活动和缺氧事件的综合作用结果。
Based on the geologic and geochemical analysis of the Lower Cambrian black rock series in northern Qianbei, combining with the previous research results, the occurrence and enrichment patterns of elements in the black rock series are discussed. The black rock series are rich in organic matter and high in clay mineral content. The Ni-Mo ore layer is mainly composed of sulfide minerals, which indicates that the elements are mainly sulfide, organic matter and clay minerals, but the occurrence of each element The status is different. The black rock series multi-element enrichment layer is a precious metal element, rare earth elements and other trace elements rich, high enrichment coefficient. The abnormal enrichment of multi-elements in black rock series is the result of the combined action of palaeogeomorphology, tectonic movement, hydrothermal activity and anoxic events.