额尔古纳超大型火山热液型铀成矿带地质特征及找矿前景  

The Geologic Characteristics and Prospecting Prospect of Eerguna Super large volcanic Hydrothermal Type Uranium Metallogenic Belt

作　　者：罗毅[1] 王正邦[1] 周德安[1] 

机构地区：[1]核工业北京地质研究院

出　　处：《华东地质学院学报》1997年第1期1-10,共10页Journal of East China Geological Institute

摘　　要：本文介绍了在额尔古纳超大型火山热液型铀成矿带中发现的超大型火山热液脉型铀矿床有５个，大型火山热液脉型铀矿床有６个，总共有铀金属储量３３万ｔ，在世界热液脉型铀矿资源量中占有重要地位。经研究认为，该成矿带内铀矿床成矿作用在时间上具有突发性特征，成矿时代集中在早白垩世，受统一中生代大陆裂陷－火山岩浆活动控制；成矿介质为深源的火山岩浆水、大气水和变质水三者相混合的具中低温的火山热液。This belt has 5 super large volcanic hydrothermal vein type uranium deposits and 6 large size volcanic hydrothermal vein type uranium deposits with a total reserve of 330 000 t and holds an important position in the hydrothermal vein type uranium resources of the world.The study shows that the metallogenesis of the uranium deposits in this metallogenic belt has features of abruptness on time.The metallogenic epoches are concentrated in early Cretaceous,and uranium metallization are controlled by a united Mesozoic continental taphrogenic volcano magmatic activity.The metallogenic media are moderate low temperature volcanic hydrothermal solutions originated from the mixing of deep volcano magmatic water,meteroric water and metamorphic water.The ore forming materials are mainly derived from Mesozoic deep enrichment type magmatic source.

关 键 词：铀矿床 成矿带 地质特征 找矿前景 火山热液 

分 类 号：P619.140.2[天文地球—矿床学] P619.140.8[天文地球—地质学]