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华南一些含铀岩体产于我国著名的钨,锡,铌,钽成矿带中;在区域上是吻合的,但在具体产出部位上,含铀岩体又往往与这些矿种的含矿岩体有一定距离。在成矿时间上,出现有规律的阶段性,钨矿的同位素年龄值为140-180百万年(以155-178百万年为主);铌,钽矿为132-140百万年;铀矿为70-90百万年。这种时,空的可分性也反映到演化特点上。众所周知,燕山花岗岩总的演化趋势是富硅,偏碱,少铁,少钙,铝过饱和以及挥发份含量逐步增高。但在这总的演化趋势下,含铀岩体往往是位于笔者所认为的钾质演化区,而钨,锡,铌,钽含矿岩体则位于钠质演化区,两种演化区有不同的演化特点和不同的成岩——成
Some uranium-bearing rock masses in southern China are produced in the famous tungsten, tin, niobium and tantalum metallogenic belt in China. They coincide with each other in the area. However, the uranium-bearing rock masses are often associated with the contents of these minerals Mine rock body has a certain distance. At the time of mineralization, there is a regular stage, the tungsten isotope age value of 140-180 million years (mainly 155-178 million years); niobium, tantalum 132-140 million years; Uranium is 70-90 million years. In this case, empty separability is also reflected in the evolution characteristics. It is well-known that the general evolutionary trend of Yanshan granite is silicon rich, partial alkali, less iron, less calcium, aluminum supersaturation and higher content of volatile. However, under this general trend of evolution, the uranium-bearing rock masses are usually located in the area of potassium evolution that the author thinks, while the tungsten, tin, niobium and tantalum ore-bearing rock masses are located in the sodium evolution area, and the two evolution areas are different The evolutionary characteristics and different diagenesis - into