论文部分内容阅读
国内外沉积盆地中铀的富集不同程度地伴随烃源岩的形成。铀作为一种兼具催化、氧化和放射性的特殊元素,其对有机矿产的形成及演化可能具有重要的促进作用,通过调查并统计国内外烃源岩中铀含量,在分析铀与各类矿物、有机质及微生物等相互作用的基础上,讨论了铀在海相烃源岩中的富集条件及主控因素,提出古大气和古海洋的氧化程度是烃源岩中铀富集的主要控制因素,陆地含氧风化和海底热液可能是海相沉积铀的2个主要来源,含铁矿物组成、有机质、磷酸盐矿物、黏土矿物及一些微生物等均可导致铀价态转化,并作为载体,通过吸附或络合作用使铀在沉积物中富集。因此,铀富集可能是烃源岩形成的一个伴随结果。
The enrichment of uranium in sedimentary basins at home and abroad is accompanied by the formation of source rocks. As a special element that combines catalytic, oxidation and radioactivity, uranium can play an important role in the formation and evolution of organic minerals. By investigating and counting uranium content in source rocks at home and abroad, uranium , Organic matter and microorganisms on the basis of the discussion of uranium enrichment conditions in the marine source rocks and the main controlling factors proposed ancient atmosphere and ancient ocean oxidation is the main source of uranium enrichment in the source rock control Factors such as terrestrial oxygen-bearing weathering and seafloor hydrothermal fluids may be the two main sources of marine-deposited uranium. The composition of iron-bearing minerals, organic matter, phosphate minerals, clay minerals and some microorganisms may lead to valence transformation of uranium, The carrier enriches uranium in sediments by adsorption or complexation. Therefore, uranium enrichment may be a companion result of source rock formation.