摘要
在综合分析塔里木盆地中新生代地质构造演化的基础上,结合铀矿石同位素年龄,划分了盆地砂岩型铀成矿作用的期次。通过对含矿目的层和后生改造成矿过程的构造控制作用研究,认为最后一次大规模喜马拉雅造山运动之前(N2前)的构造作用对砂岩型铀成矿有利,之后主要是对早期形成的矿体有所改造。对构造控矿的成矿模式进行了研究,认为在构造变形较弱部位主要形成库捷尔太式铀矿床、在构造变形强烈部位主要产出萨瓦布其式铀矿床、而在原生红色或杂色层位(K～N)中主要形成巴什布拉克式铀矿床。
Based on comprehensive analyses on tectonic evolution of Tarim Basin and combined with isotopic ages of ores, the metallogenie stages of sandstone-type uranium deposits in the basin have been divided, the control of structures on ore-bearing strata and epigenetieally altered metallogenie processes have been studied and it is believed that the structures before the last large-scale Himalayan Orogeny（before N2） are favorable for metallogenesis of sandstone-type uranium deposits and those after the Himalayan Orogeny mainly altered the ore bodies formed earlier. The metallogenie models for deposits controlled by structures have been studied and it is concluded that Kujieertai-type uranium deposits were formed in weakly deformed parts of structures, Sawabuqi-type uranium deposits were formed in strongly deformed parts of structures and however, Bashibulake-type uranium deposits were formed in the original red or mottled strata of K-N.
出处
《世界核地质科学》
CAS
2006年第4期187-193,共7页
World Nuclear Geoscience
基金
南疆铀资源勘查部署规划研究(地D0304)
关键词
塔里木盆地
构造演化
砂岩型铀矿
构造控矿
成矿模式
Tarim Basin
tectonic evolution
sandstone-type uranium deposits
structure-controlled deposits
metallogenie model
