铀矿地质2026，Vol.42Issue(1)：137-147,11.DOI:10.3969/j.issn.1000-0658.2025.41.010
广西摩天岭岩体硅质热液活动对铀成矿作用的指示意义
Significance of Silica-rich Fluid Activities to Uranium Mineralization in Motianling Pluton,Gunagxi
摘要
Abstract
Motianling pluton in Guangxi province of China,is an important uranium deposit host intrusion with excellent uranium mineralization conditions.There are mainly two types uranium deposit in the pluton:U-chlorite and U-silicate vein.However,exploration of U-silicate vein type deposits(e.g.Xincun ore deposit)got little progress in past 30 years.In order to provide guidance for the exploration of U-silicate vein type deposits,this study analyzed the spatial-genetic relationship between the silicified zones and uranium mineralization with statistical methods based on the previous exploration outcome and the experience of recent exploration work,discussed the pattern of siliceous hydrothermal activity on uranium mineralization.The results indicate that the silicification zone with thickness of 20-45 m extending in NE direction can be used as indirect indicator for uranium mineralization.The Himalayan-Yanshanian the hydrothermal fluid activities were divided into 3 stages(pre-,syn-and post-mineralization)with 10 phases.It was found that a single silica-rich fluid activity had a quite limited potential of U mineralization,but the overprint of multi-stage silica-rich fluid activities were favorable to form profitable ore body,while the intensive post-mineralization hydrothermal fluid activities with the precipitation of light color chalcedony contributed less to the U enrichment.This understanding on the metallogenic characteristics of the Motianling silicate vein type uranium deposit will provide a reference for the further exploration on Xincun-type uranium deposit.关键词
硅质热液活动/铀成矿作用/摩天岭岩体/广西Key words
silica-rich fluid activities/uranium mineralization/Motianling pluton/Guangxi分类
天文与地球科学引用本文复制引用
谭江东,叶武,郭春影,杨航,梁学聪,李光泽,董会..广西摩天岭岩体硅质热液活动对铀成矿作用的指示意义[J].铀矿地质,2026,42(1):137-147,11.基金项目
广西壮族自治区地质矿产勘查开发局项目"广西X矿资源勘查关键技术研究人才小高地"(编号:桂地矿发[2022]36号、桂地矿办[2022]97号) （编号:桂地矿发[2022]36号、桂地矿办[2022]97号）
"广西融水县新村地区铀资源潜力评价"(编号:桂地矿核[2020]9号、桂地矿核[2021]4号) （编号:桂地矿核[2020]9号、桂地矿核[2021]4号）
"广西融水县梓山坪地区铀资源潜力评价"(编号:桂地矿核[2023]6号、桂地矿核[2024]5号) （编号:桂地矿核[2023]6号、桂地矿核[2024]5号）
"达亮铀矿床及外围构造控矿规律研究与找矿预测"(编号:地技GX2403) （编号:地技GX2403）
广西壮族自治区自然资源厅项目"广西融水县茶山铀矿普查"(编号:桂核办[2022]4号、桂核办[2023]4号)联合资助. （编号:桂核办[2022]4号、桂核办[2023]4号）
