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目前关于法国脉型沥青铀矿床的地球化学和地质年龄的资料,和热液成因学说是矛盾的,虽然提出了热液说,但大陆风化说仍然是关于法国沥青铀矿脉矿床成因的适宜理论。该理论包括:1)含铀区大多与花岗岩有关,在缺少任何植被的情况下,花岗岩中的铀(晶质铀矿)易受风化而与 Si、Al、Na、和 Ca 一起淋滤出来;2)除 Na 外,这些元素主要是在含有石英、粘土或方解石胶结物的沥青铀矿床中发现的;3)这个风化条件是在二迭纪形成的,约255百万年前,在此期间可能形成矿化(用 U-Pb 法年龄测定);4)脉型沥青铀矿床在矿物共生组合和生成次序上,同地表来源的铀矿床,如美国某些由渗透水循环而形成的矿床,在许多方面是相似的。如果这种理论是正确的,则脉型矿床应当与红层同时生成,而红层的存在即可成为有意义的指导区域普查的准则。
At present, the data on the geochemical and geologic age of the vein-type uranium deposit in France are contradictory to the genesis of hydrothermal origin. Although hydrothermal fluids were proposed, the continental weathering theory is still an appropriate theory on the genesis of France’s uraninite vein deposits. The theory includes: 1) Mostly uranium-bearing areas are related to granite. In the absence of any vegetation, uranium (crystalline uranium deposits) in granite are susceptible to weathering and are leached together with Si, Al, Na and Ca; 2) These elements, except for Na, were found predominantly in asphaltic uranium deposits containing quartz, clay or calcite cements; 3) this weathering condition was formed in the Permian, about 255 million years ago, during which time (U-Pb dating); 4) Vein type uranium deposits are similar to uranium deposits originating from surface sources such as those formed by the circulation of permeated water in the United States in the order of mineralogical assemblages and formation Many aspects are similar. If this theory is correct, vein-type deposits should be generated simultaneously with the red beds, and the presence of the red beds can be a meaningful guideline for conducting the census.