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从物理性质及化学成分两方面研究了锆石特征及其与铀成矿作用的关系。表明锆石晶体颜色与铀含量有关;在普平的锆石群型研究法基础上,设计了锆石群型分区图,得出产铀矿岩体的锆石群型主要在Ⅱ区,其次为Ⅳ区;锆石中的U和Th,Hf,Ta呈同步增长趋势;产铀矿地质体中锆石铀含量明显增高,其灵敏度远大于岩石铀含量;锆石铀含量高的时代往往与该地区该时期产出铀矿的情况较好有关。统计了1785个数据的锆石平均铀含量,得出了明显的规律,即锆石平均铀含量在产铀矿好的地区、岩类、地质体及成矿带均高于在成矿不好或非产铀矿的地区、岩类、地质体及成矿带者。由此可见,区域上锆石平均铀含量实际上反映了区域含铀的原始背景值,其高低直接制约着尔后铀成矿的可能性。在此基础上评述了已知铀成矿带和远景区的铀源条件,并对81片地区岩浆岩的锆石平均铀含量作了对比分级,提出了值得进一步工作的地区。
Zircon characteristics and their relationship with uranium metallogenesis were studied from both physical and chemical aspects. It is indicated that the color of zircon is related to the uranium content. Based on the study of the zircon assemblages in Purpin, zircon zoning maps were designed. The zircon assemblages of uranium ore bodies are mainly in zone Ⅱ, followed by Ⅳ zone. U and Th, Hf and Ta in zircons show a synchronous growth trend. The zircon uranium content in uranium ore bodies increases obviously, and its sensitivity is far greater than that of rock uranium. The situation of uranium output in this area during this period is better. The average uranium content of 1785 data was calculated, and the obvious law was obtained that the average uranium content of zircons was good in uranium producing areas, and the rock types, geologic bodies and metallogenic belts were all higher than those in the poor mineralization Or non-uranium production areas, rock, geological bodies and metallogenic belt. Therefore, the average zirconium content in the area actually reflects the original background value of uranium in the area, which directly restricts the possibility of later uranium mineralization. On this basis, the uranium source conditions of known uranium metallogenic belt and vista are reviewed, and the average zirconium uranium content of magmatic rocks in 81 areas is compared and graded, and some areas worthy of further work are put forward.