摘要
本文通过对中国各主要火山岩带铀成矿时代(年龄)的统计分析。提出各火山岩带往往只存在两个主成矿期,并且每期铀成矿作用总是与该带地史上所发生的重要构造岩浆热事件同步。系统总结类比了两期铀成矿作用在地质条件、矿化特征及成矿机理等方面的差别;对中国大小兴安岭中生代火山岩带、西藏冈底斯山北部新生代火山岩带铀成矿期及成矿远景作了初步的分析预测。提出了进一步划分火山岩型铀矿化的依据。并据此对中国火山岩型铀矿床作了进一步划分。
On the basis of a statistical analysis on uranium minerogenetic epochs of the main volcanic rock belts in China, the existence of two major uranium mineralization periods in the same volcanic rock belt is presented, and each uranium mineralization period always is synchronous to an important tectono-magmatic thermal event which occurred along this belt in the geological history. The differences between two periods of uranium mineralizations are summarized and contrasted in geological conditions, mineralizaton characteristics and ore-froming mechanism. The uranium mineralization periods and metallogenetic prospects are analysed and forecasted in Mesozoic volcanic rock belt in the Greater and Lesser Xing'an Mountains and in the northern Gondise Mountain, Tibet. The criteria to further divide the volcanic type uranium mineralizations are proposed. In accordance with these criteria, the volcanic type uranium deposits in China are divided as well.
出处
《铀矿地质》
CSCD
北大核心
1991年第2期94-98,共5页
Uranium Geology
关键词
铀矿
成矿期
矿化类型
划分
火山岩
Major uranium mineralization period, Tectonomagmatic thermal event, Uranium mineralization type, Association of elements-minerals
