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在相山铀矿田 612 2矿床 4号带的主要含矿岩石英安岩和“碎斑熔岩”之外发现了新的含矿岩石凝灰岩。铀矿石中绿泥石含量较高 ,并且含铀达 7.13 %。经过对含矿凝灰岩特征、矿化与构造的关系、与铀矿物共生矿物的特征进行研究 ,笔者认为成矿热液来自于地壳深部 ,曾经经历过高温阶段。在矿化蚀变过程中形成大量绿泥石、水云母等粘土矿物 ,它们使铀酰络离子稳定性、溶解度降低而解体 ,使铀还原沉淀并被绿泥石、水云母等吸附
New ore-bearing rock tuffs have been discovered outside the major ore-bearing rocks and “crushed-lava” in the No. 4 zone of the 612 2 deposit in the Xiangshan uranium field. Chlorite content of uranium ore is high, and uranium content of 7.13%. After studying the relationship between the characteristics, mineralization and tectonics of the tuff, and the characteristics of the symbiotic minerals with uranium minerals, the author thinks that the hydrothermal fluids originate from the deep crust and have experienced the high temperature stage. During the process of mineralization and alteration, a large amount of clay minerals such as chlorite and aqua mica are formed, which reduce the stability and solubility of uranyl complex ions and disintegrate them, so that uranium can be reduced and precipitated and adsorbed by chlorite and water mica