【摘要】 本文详细研究石源龙地区铀矿床的同位素地质特征，并由此得出：ａ．成矿时间大约为９２Ｍａ～１１５Ｍａ；ｂ．成矿溶液来自当地中生代的大气降水；ｃ．成矿溶液中锶和稀土元素的来源与南园组的流纹质熔结凝灰岩有关；ｄ．成矿过程中伴随着ＣＯ２的逸失发生了同位素交换动力学效应，而且ＣＯ２大量逸失是导致沥青铀矿沉淀的主要原因。更多还原

【Abstract】 Based on studied in dedail isotopic characteristics of uranium deposit in Shiyuanlong area,some main conclusions are as follows in this paper:1.The time of mineralization was 92 Ma~115 Ma.2.The oreforming fluid was derived from local meteoric water in Mesozoic.3.Strontium and REE elements in the oreforming fluid was mainly derived from rhyolitic welded tuff and enriched siliceous ultrasheet welded tuff.4.Enormous loss of CO2 in oreforming fluids may be the primary cause of uramium ore precipitation. 更多还原