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前言多年来,北京第三研究所同位素地质室测定了我国南方震旦、寒武纪地层中沥青铀矿或含铀岩石样品近20个,绝大多数样品的视年龄值在一亿年以内(且多在0.5亿年以内)。由此,似乎使人感觉到这些老地层中的铀矿化皆为后生淋积型。近期测定了3111矿床6个含铀硅板岩(全岩)样,提供的视年龄值是201—1008百万年。下面试采用几种年龄计算模式进行了处理,获得了该矿床两次铀矿化形成的大致年龄结果。这可能给3111矿床解释为成岩聚集铀(贫矿),后生成矿(工业矿)复成因矿床提供一个方面的论据。
Preface For many years, the isotope geologic chamber of the Third Institute of Beijing has measured nearly 20 samples of asphaltic uranium ore or uranium-bearing rock in the Sinian and Cambrian strata in the south of China. The vast majority of samples have an age value of less than 100 million years And more than 50 million years). As a result, it seems that people feel that these ungraded uranium deposits are all metazoan type. Recently, six uranium-bearing silicon-slate (whole rock) samples of the 3111 deposit have been measured, providing an apparent age of 201-1008 million years. The following test was conducted using several age-calculation models, yielding the approximate age results for the two uranium mineralizations of the deposit. This may explain the 3111 deposit as providing diagenetic aggregated uranium (lean) and post-formed (industrial) complex methanogenic deposits providing one aspect of the evidence.