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 oreforming fluid was derived from local meteoric water in Mesozoic.3.Strontium and REE elements in the oreforming fluid was mainly derived from rhyolitic welded tuff and enriched siliceous ultrasheet welded tuff.4.Enormous loss of CO2 in oreforming fluids may be the primary cause of uramium ore precipitation.
出处
《矿物岩石》
CAS
CSCD
北大核心
1997年第4期68-75,共8页
Mineralogy and Petrology
基金
国家自然科学基金
关键词
同位素组成
等时线年龄
铀矿床
火山岩
地质特征
isotopic composition isochron age uranium deposit Shiyuanlong area volcanic rock
