世界核地质科学2026，Vol.43Issue(1)：37-52,16.DOI:10.3969/j.issn.1672-0636.2026.01.003
湖南独松地区铀矿化地质特征与控矿因素研究
Geological characteristics and ore-controlling factors of Dusong uranium mineralization in Hunan province
摘要
Abstract
The Dusong area is located in the Taoshan-Zhuguang uranium metallogenic belt within the Nanling region,characterized by favorable uranium metallogenic geological settings.Multiple phases of granite have developed in the area,among which the early Yanshanian third-stage medium-to fine-grained two-mica monzogranite constitutes the uranium-rich rock body.The faults developed in the area are primarily oriented nearly SN and NEE.Among these,the NEE-trending F11 and F9 faults are ore-bearing structures.Geochemical and geophysical anomaly halos are mainly distributed as clusters and bands along the NEE-trending fault zones.Through field geological surveys,petrographic analysis,α-track etching,scanning electron microscopy,and electron probe microanalysis,a systematic study was conducted on the uranium mineralization characteristics of the Dusong area.The tectonic phases and hydrothermal alterations in the area were delineated,and the ore-controlling factors for uranium were summarized.Ore bodies are primarily hosted within the NEE-trending F11 fault zone,with ore-bearing lithologies including cataclastic lamprophyre,silicified lamprophyre,and cataclastic granite.Uranium minerals are mainly pitchblende and coffinite.The mineralization process can be divided into a hydrothermal mineralization period and a supergene oxidation period.During the hydrothermal mineralization period,two important mineral association types were formed:uranium-microcrystalline quartz-hematite and uranium-hematite.The NEE-trending structures underwent three stages of hydrothermal alteration.Uranium mineralization mainly occurs within 0-100 m of the hanging wall and footwall of the contact interface between two phases of rock bodies,accompanied by strong silicification and strong hematitization.The ore-controlling factors mainly include the NEE-trending F11 fault,lamprophyre dikes,rock contact interfaces,and wall-rock alterations.Among these,the NEE-trending F11 fault and lamprophyre dikes are the primary ore-controlling factors,while near-ore wall-rock alterations play a significant role in enriching the mineralization.关键词
地质特征/铀矿化特征/控矿因素/独松地区Key words
geological characteristics/uranium mineralization characteristics/ore-controlling factors/Dusong area分类
天文与地球科学引用本文复制引用
陈随,欧阳平宁,王前林,李鲲,陈峰..湖南独松地区铀矿化地质特征与控矿因素研究[J].世界核地质科学,2026,43(1):37-52,16.基金项目
中国核工业地质局铀矿地质项目(编号:201930-1)资助 Supported by Geological Exploration Project of China Nuclear Geology(No.201930-1) （编号:201930-1）
