世界核地质科学2026，Vol.43Issue(4)：834-844,11.DOI:10.3969/j.issn.1672-0636.2026.04.016
基于GF-5高光谱数据的新疆雪米斯坦东段热液蚀变提取与铀成矿远景预测
Hydrothermal alteration mapping and uranium prospectivity mapping based on GF-5 hyperspectral satellite data:a case study in the eastern Xuemisitan area,Xinjiang
摘要
Abstract
Hydrothermal alteration serves as one of the crucial indicators of hydrothermal activity and metallogenic processes.Based on GF-5 hyperspectral data,this study employs techniques such as Spectral Angle Mapper(SAM),Spectral Feature Fitting(SFF),and Mixture Tuned Matched Filtering(MTMF)to extract hydrothermal alteration and analyze alteration mineral assemblages in the volcanic rock area of the eastern Xuemisitan region,Xinjiang.On this basis,uranium prospecting target areas are predicted.The results indicate that the hydrothermal alteration in the eastern Xuemisitan region is predominantly sericitization(including high-,medium-,and low-aluminum sericite),followed by chloritization and the presence of iron oxides/hydroxides.Spatially,these alterations are mainly distributed along near-NW,near-EW,and NE trending structural belts,exhibiting banded,patchy,and locally superimposed patterns.The assemblage of high-aluminum sericite and iron oxides is primarily developed at fault intersections,volcanic rock fracture zones,and near the contact zones of certain intrusive rocks,reflecting relatively high-temperature and acidic hydrothermal metasomatism coupled with subsequent oxidation.Conversely,the sericite-chlorite assemblage is commonly found in intermediate to mafic volcanic host rocks,indicating medium-to low-temperature hydrothermal metasomatism.Integrating the metallogenic model,ore-controlling factors,and alteration characteristics of known uranium deposits within the Xuemisitan metallogenic belt,this study suggests that the eastern segment with the combination of high-,medium-,and low-aluminum sericite,chlorite,iron oxides/hydroxides,and structural intersections/volcanic-intrusive rock contact zones represents favorable metallogenic domains.Consequently,one key prospect area,two secondary prospect areas,and one general prospect area have been delineated.This research demonstrates that GF-5 hyperspectral data can provide an effective basis for hydrothermal alteration extraction and uranium prospecting prediction in the eastern Xuemisitan region.关键词
GF-5卫星/高光谱遥感/热液蚀变/雪米斯坦/远景预测Key words
GF-5 satellite/hyperspectral remote sensing/hydrothermal alteration/Xuemisitan/prospecting prediction分类
天文与地球科学引用本文复制引用
武鼎,张川,木红旭,徐隆鑫..基于GF-5高光谱数据的新疆雪米斯坦东段热液蚀变提取与铀成矿远景预测[J].世界核地质科学,2026,43(4):834-844,11.基金项目
"中核集团第八批青年英才项目"(编号:QNYC2502) （编号:QNYC2502）
"铀矿地质勘查项目"(编号:遥 D2411)和"关键矿产资源勘查与开发江西省重点实验室开放基金项目"(编号:GJKC2024KF05)联合资助 Supported jointly by CNNC 8th batch of Young Talent Project(No.QNYC2502) （编号:遥 D2411）
Uranium Geological Exploration Project(No.D2411) （No.D2411）
Open Fund Project of Jiangxi Provincial Key Laboratory of Exploration and Development of Critical Mineral Resources(No.GJKC2024KF05) （No.GJKC2024KF05）
