前言在砂岩型铀矿床中,美国的非海相中生代和第三纪矿床最重要。把造成美国砂岩型矿床中铀富集的古地理和沉积条件与产于古生代末期的欧洲砂岩型矿床相比较,则可发现美国与欧洲地层有某些相同之处,特别是早二迭纪岩系。在局部地区,工业铀矿化产于陆相碎屑沉积。这种铀矿化不仅产于砂屑岩中,而且还广泛 Preface Among the sandstone-type uranium deposits, the non-marine Mesozoic and Tertiary deposits in the United States are the most important. Comparing the paleogeographic and sedimentary conditions that contributed to the enrichment of uranium in the sandstone-type deposits of the United States to the European sandstone-type deposits that were produced in the late Paleozoic can reveal some similarities between the United States and the European strata, especially the Early Peridotite system. In some areas, industrial uranium mineralization occurs in continental detrital sediments. This uranium mineralization is not only produced in sandstone rocks, but also widely