俄罗斯马林诺夫铀矿床成因探讨  

Genesis of Malinov uranium deposit in Russia

作　　者：丁万烈 

出　　处：《世界核地质科学》2005年第2期82-86,113,共6页World Nuclear Geoscience

摘　　要：俄罗斯马林诺夫铀矿床与已知古代和现代的古河道型外生后生铀矿床不同,它强烈发育不止一次的绿泥石化,且局部出现硫化物-硒化物化和碳酸盐化,古层间-潜水氧化发育的可靠标志表现弱。矿石中铀的一套伴生元素,既包括对于外生后生矿床典型的一系列元素(Se、Re、Mo和V),又包括对外生后生矿床不典型而对热液矿化特有的元素(Pb、As)。研究矿石的物质成分发现在铀矿物中铀石明显占优势,而在硒矿物中斜方铁硒矿明显占优势,含铀溶液具有明显强渗透能力及侵蚀性。方解石中的流体包体特征证明,流体为含氯化钙(及Mg、Fe)盐水与大气水的混合物。马林诺夫铀矿床独特的矿物-地球化学特征表明,该矿床以内生成矿作用为主,且对矿石的工艺性质有重要影响。Differing from the ancient and modern known palaeochannel-type exogenetic-epigenetic uranium deposits, Malinov uranium deposit has developed strong chloritization for several times. Besides, sulfidization-selenidization and carbonation occurs locally, and palaeo-interlayer-phreatic oxidation shows weak indication. There is a set of uranium-associated elements (Se, Re, Mo and V) typical for exogenetic-epigenetic deposits, but also some elements(Pb, As) characteristic to the hydrothermal mineralization. By studying the ore composition, it has been revealed that coffinite is predominant in uranium minerals and ferroselite dominates in the selenium minerals. The uranium-bearing solution is characterized by obvious strong permeability and corrosiveness capability. Features of the fluid inclusion in the calcite show that the fluid is a mixture of chloride-calcium (and magnesium, iron) brine and atmospheric water. Unique mineral-geochemical features of Malinov uranium deposit indicate that the endogenic mineralization plays an important role in the formation of this deposit, and may exert an important effect on the processing technology of the ores.

关 键 词：马林诺夫铀矿床 成因 绿泥石化 铀石 热液矿化 

分 类 号：P619.14[天文地球—矿床学] P611[天文地球—地质学]