西藏南木林盆地铀异常地质特征及成矿条件分析  

Analysis on Metallogenic Conditions and Geological Features of Uranium Anomaly in Nanmulin Basin,Tibet

作　　者：陈玉梁 姚毅锋 王进进[2] 姚海平 陈载林[3] 

机构地区：[1]核工业280研究所,四川广汉618300 [2]昆明理工大学国土资源工程学院,云南昆明650093 [3]云南国土资源职业学院,云南昆明650217

出　　处：《铀矿地质》2016年第6期363-370,共8页Uranium Geology

基　　金：中国地质调查局西藏冈底斯构造带铀资源调查评价项目(编号:1212010913025)

摘　　要：西藏南木林盆地是一个经历多次构造活动的中-新生代断陷盆地,近年来在该盆地相继发现了一批铀异常点(带),主要产于第三系流纹岩、凝灰岩和喜山期花岗岩中。该盆地基底、蚀源区及盖层岩石的铀含量普遍较高,具有成矿的物质基础;盆地断裂构造也比较发育,中东部断裂带铀异常明显;铀异常具有点多、分布广的特点,是铀矿找矿的重点地区之一。笔者初步认为,南木林盆地具有形成花岗岩型、火山岩型等构造热液型铀矿床的有利地质条件和找矿前景。Nanmulin basin is a Meso-Cenozoic fault basin that experienced multi-stage tectonic activities in Tibet.In recent years,multiple abnormal points（belt）was discovered subsequently in the basin.Uranium mineralization mainly occurs in Tertiary rhyolite,tuff and Himalayan stage granite rocks,etc.High content uranium was widely distributed in the rocks of basement,covers and source area which provide the material foundation for uranium mineralization.Structure are well developed and a lot of uranium anomalies widely distribute in the central and eastern fracture zones which can be regarded as the focal area for the prospecting.Nanmulin basin was believed with favorable geology conditions and good prospecting for the formation of structure-hydrothermal uranium deposit of granite type,volcanic type.

关 键 词：地质特征 成矿条件 铀异常点(带) 中-新生代 南木林盆地 

分 类 号：P612[天文地球—矿床学]