在取得大量中子活化分析数据的基础上，应用元素丰度规律研究川北砂岩后认为：川北砂岩泥岩系是二元混合作用的产物，浅色砂岩与红色泥岩（或红色砂岩）具有不同的元素组合特征；含铀浅色砂岩与不含铀浅色砂岩均具有十分明确的地球化学指标；铀矿化只产在含铀浅色砂岩中。 Based on the data obtained from a large number of neutron activation analyzes, the study on the sandstone in North Sichuan using the element abundance law shows that the sandstone shale in North Sichuan is a product of binary mixing, and the light sandstone and red mudstone (or red sandstone) have different elements Combined features; uranium light-colored sandstone and non-uranium light-colored sandstone have very clear geochemical indicators; uranium mineralization only in light uranium-bearing sandstone.