华南印支期花岗岩分布及铀含量特征

近年来,随着华南地区越来越多的印支期花岗岩被发现,许多学者对其有了一些新的认识。华南印支期花岗岩的分布主要受一些区域性断裂构造控制,呈线性分布,主要与晚二叠世(约256 Ma)开始的古太平洋板块向欧亚大陆俯冲有关。印支期花岗岩的平均铀质量分数为10.34×10~(-6),远远高于世界酸性岩平均值,且其分布与华南铀成矿带的分布有一定的耦合性,华南印支期花岗岩可能是华南铀矿非常重要的铀源岩。

The distribution and uranium content characteristics of Indosinian granite in South China

In recent years, more and more Indosinian granite plutons so some new ideas about the granity were proposed by scholars. has been found in South China, The Indosinian granite in South China distributed in lineshape, and is controlled by some regional faults. Its formation was mainly related to geodynamic setting which began in the late Permian（about 256 Ma） by the subduction of the ancient Pacific Plate to the Eurasia. The average uranium content of Indosinian granite is 10.34ppm, much higher than the average value of world＇s acid rock. There occurs some couplings between the distribution of the Indosinian granite plutons and uranium mineralization belt in South China. So the Indosinian granite in South China may act as important uranium sources for the mineralization.