罗辛(Rossing)铀矿床位于纳米比亚中西部,距首都温得和克(Windhoek)约200 km,是世界上最大的白岗岩型铀矿床(图1)。该矿床目前为世界天然铀资源的主要提供者之一,生产的铀矿约占世界年产量的7%。20世纪初期,人们在罗辛地区的伟晶岩中发现了放射性物质的存在,以后陆续圈定出一些放射性异常带。1956年,英美资源集团(Anglo American Pros- The Rossing uranium deposit, located in the central western part of Namibia, about 200 km from the capital Windhoek, is the largest white-granite-type uranium deposit in the world (Figure 1). The deposit is currently one of the major providers of natural uranium resources to the world and produces about 7% of the world’s annual production of uranium. In the early 20th century, radioactive substances were found in the pegmatites in the Rohingy area, and some radioactive anomalies were later delineated. In 1956 Anglo American Pros-