伊比利亚半岛上铀矿化的主要矿床产在上元古界一下寒武统片岩-杂砂岩杂岩系的变沉积物中的断裂带和角砾岩带内。此杂岩系与花岗岩侵入体一道组成了伊比利亚高原华力西基底。这些矿床中最重要的矿床是Saelices矿床群中的Fe矿山(位于西班牙萨拉曼卡省Ciudad Rodrigo西北约10km处)。该矿床于1957年发现,1974年投产,其年产200tU_3O_8。现在的Fe矿山储量超过16 000t。 本文以U-Pb同进素地质年代,碳酸盐和硫化物的稳定同位素分析及以绿泥石分析为基础的地热数据等资料,探讨了Fe矿床的成因。 The main deposits of uranium mineralization in the Iberian peninsula are in the fault zones and breccia belts in the metasedimentary metamorphic Cambrian-miscellaneous sandstone sediments of the Proterozoic. Together with granite intrusions, this complex formed the Variscan base of the Iberian Plateau. The most important of these deposits is the Fe mine in the Saelices deposit (located about 10 km northwest of Ciudad Rodrigo, in the province of Salamanca, Spain). The deposit was discovered in 1957 and put into operation in 1974, with an annual output of 200tU_3O_8. Fe reserves now exceed 16,000t. In this paper, the origin of Fe deposit is discussed based on U-Pb isotopic age, stable isotope analysis of carbonate and sulfide, and geothermal data based on chlorite analysis.