石源龙地区铀矿床的同位素地质特征  

ISOTOPOC GEOLOGICAL FEATURES OF URANIUM DEPOSIT SHIYUANLONH AREA

作　　者：卢武长[1] 杨绍全[1] 张萍[1] 王玉生 

机构地区：[1]成都理工学院

出　　处：《矿物岩石》1997年第4期68-75,共8页Mineralogy and Petrology

基　　金：国家自然科学基金

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。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. 

关 键 词：同位素组成 等时线年龄 铀矿床 火山岩 地质特征 

分 类 号：P619.140.2[天文地球—矿床学] P619.140.4[天文地球—地质学]