某区花岗岩体有大小数千个(如图1)。东部在花岗岩体内已探明了一批铀矿床和矿点,因此花岗岩,尤其是富铀的燕山期花岗岩,已成为寻找铀矿的主要对象。但近年来,在该区西部的放射性区调、普查、揭露和航空测量中,在花岗岩体内并未发现较好的呈矿线索,相反 A district granite body size of thousands (Figure 1). In the eastern part of the granite, a number of uranium deposits and ore deposits have been identified. Therefore, granites, especially the Yanshan granites rich in uranium, have become the main targets of uranium exploration. However, in recent years, no radioactive clues have been found in the granite bodies in radioactive regional surveys, censuses, exposures and aerial surveys in the western part of the area. On the contrary,