相山矿田成因类型的讨论

江西相山铀矿田位于火山盆地中,前人对该地区铀矿床已经做了较多工作,但对于铀矿床的成因方面仍存在诸多争议,尤其是对盆地周缘斑岩体的认知以及深部铅锌的发现,更是增添了矿床成因的复杂性。近年部分学者提出了相山铀矿应属于斑岩型矿床。本文通过总结前人的研究工作,对相山火山-侵入杂岩体地球化学特征以及矿床围岩蚀变特征等进行了详细研究,并与典型斑岩型铜(钼)矿床的斑岩体以及矿石形态等特征进行了对比,认为：相山铀矿田与典型的斑岩型矿床差别较大,赋矿围岩为中上地壳变质基底重熔的S型花岗岩,矿石矿物虽然以浸染状为主但是围岩蚀变具有典型的线状特征,应该属于火山(岩浆)热液型。

The genetic type of Xiangshan uranium ore fieldQing-Kun Yang

Xiangshan uranium ore field is located in a volcano basin, the predecessors have done many works on uranium deposits in this area, there are still a lot of controversies about the genesis of uranium deposit, especially the people cognize porphyry more and more deeply and find lead and zinc in the deep of the basin, adding to the complexity of the genesis of ore deposits. In recent years, some scholars propose that the Xiangshan ore field should belong to porphyry deposit. This paper summarizes the previous research work, study the Xiangshan volcano intrusive complex geochemical characteristics and ore rock alteration characteristics in detail, and compare Xiangshan uranium ore field and the typical porphyry copper (molybdenum) deposit. The author consider that Xiangshan uranium ore field is different from the typical porphyry deposit, the host rock is S type granite from the upper and middle crust remelting metamorphic basement. Although the ore minerals are dominated by disseminations, the typical characteristics of wall rock alteration is linear. The uranium ore field should belong to the volcano hydrothermal type.