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四川盆地北部侏罗——白垩系河流相浅色砂(砾)岩中,广泛分布着一些层控型铀矿。矿化明显地受地层、岩相及岩性控制;在时控分布上具有多层位、多部位及层控、带布、槽存的特点。目前,已在其中找到了若干具有工业意义的小型铀矿床。同时,对于矿石中铀的存在形式及其分布特征,也取得了一些初步认识。一、铀的存在形式: 我们通过普通放射性照相、显微放射性照相、电子探针和电渗析等手段,初步确定了川北砂岩型铀矿床矿石中铀的存在形式主要是铀矿物和吸附铀两种,另有少量含铀有机质及微量类质同象铀。
Some strata-type uranium deposits are widely distributed in the Jurassic-Cretaceous fluvial sandstone (gravel) rocks in the northern Sichuan Basin. Mineralization is obviously controlled by the strata, lithofacies and lithology. It has multi-layer, multi-site and layer control, belt cloth and groove storage in time-controlled distribution. At present, a number of industrial-scale small uranium deposits have been found. At the same time, some preliminary understanding has also been made on the existing forms of uranium in ore and its distribution characteristics. First, the existence of uranium: We through the ordinary radiography, micro-radiography, electron probe and electrodialysis and other means, initially identified in the North Sichuan sandstone-type uranium ore deposits in the form of uranium minerals and uranium are two , While a small amount of uranium-containing organic matter and trace similar uranium.