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华南产铀花岗岩以燕山期为主,加里东期次之,海西及印支期少见,其同位素地质年龄在414—138百万年之间。然而,近年来对M岩体的研究表明:它是华南已知最老的产铀岩体,同位素地质年龄760百万年,Sr~(87)/Sr~(86)初始值0.735,是属前寒武纪雪峰期陆壳改造型的黑云母花岗岩,沥青铀矿化年龄为47—64百万年(喜山期).然而,产铀岩体形成之后,直到铀元素富集成矿之时这段漫长的地质时期,古气候和构造地貌是怎样变化的?它们和铀成矿之间又有何
South China-origin uranium granite mainly Yanshanian, Caledonian second, Hercynian and Indosinian rare, isotope geological age of 414-138 million years. However, recent researches on M rock mass indicate that it is the oldest known uranium rock mass in southern China with an isotopic geologic age of 760 million years and an initial value of Sr ~ (87) / Sr ~ (86) of 0.735 During the Precambrian snow-caprock transformation of biotite granites, the pitch uranium mineralization age is 47-64 million years (Himalayan period) .However, after the formation of uranium rock mass, until uranium enrichment mineralization What is the change of paleoclimate and tectonic landform during the long geologic period? What is the relationship between them and uranium mineralization?