钱家店铀矿床漂白砂岩成因探讨

钱家店铀矿床是近年来松辽盆地发现的1个砂岩型铀矿床。铀矿体呈板状、透镜状，受漂白砂岩与灰色砂岩接触带控制。漂白砂岩呈灰白色，胶结疏松，基本不含有机碳及黄铁矿，且有铀的富集。通过研究漂白砂岩的地球化学特征以及黏土矿物类型与组合，认为漂白砂岩是层间氧化带氧化作用的产物，是层间氧化带的一部分。漂白砂岩呈白色调的主要原因是铁离子的迁移、有机碳的氧化和岩石的高岭石化。

Discussion on the origin of bleached sandstone of Qianjiadian uranium deposit

Qianjiadian uranium deposit is a sandstone-type uranium deposit that has been discovered Basin in recent years. Uranium ore bodies are planar or lenticular in shape and under the control of the contact between gray sandstones and bleached sandstones. The bleached sandstone is white in color, cemented loosely, nearly without TOC and pyrite contained and rich in uranium. Geochemical characteristics and types and assemblages of clay minerals of the bleached sandstone reveal that the bleached sandstone is the product of oxidation of the interlayer oxidation zone, and it is a part of the interlayer oxidation zone. The main reasons for white color of the bleached sandstone are transfer of iron ion, oxidation of TOC and kaolinization of sandstone.