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一九八○年我们在研究川北含铀砂岩物质成分时,再次发现了较多的自硒铁矿。这是继广东九室一九七九年在我国首次发现以后,再次发现的一种较罕见的硒矿物。并且与铀矿化在空间上和成因上都有着密切联系。为此我们做了一些矿物学研究工作。该矿物产于下白垩世苍溪组底部陆相红色碎属岩建造的浅色砂岩层之中。砂岩由石英(40—50%)、岩屑(50—30%)及少量长石(10%左右)等碎屑组成,胶结物主要为方解石,其次有少量泥质铁质物。白硒铁矿主要产于碎屑边缘及方解石胶结物之中,偶而也出现
In 1980, when we studied the material composition of uranium-bearing sandstones in North Sichuan, we found more selenite from it. This is a rare selenium mineral discovered again after the discovery of the ninth house of Guangdong in 1979 in our country for the first time. It is also closely related to uranium mineralization both in space and genesis. For this we have done some mineralogy research. The mineral was found in the light-colored sandstone layers of continental red crustal rocks at the bottom of the Cangxi Formation in the Lower Cretaceous. Sandstone is composed of detritus (40-50%), lithic debris (50-30%) and a small amount of feldspar (about 10%). The cements are mainly calcite, followed by a small amount of argillaceous iron. White selenite is mainly produced on the edge of detritus and calcite cement, and occasionally appears