世界核地质科学2025，Vol.42Issue(5)：1091-1105,15.DOI:10.3969/j.issn.1672-0636.2025.05.016
基于多源信息融合的柴达木盆地北缘东段砂岩型铀成矿有利区优选
Favorable zones screening of sandstone-hosted uranium mineralization in the eastern segment at the northern margin of Qaidam basin based on multisource data integration
摘要
Abstract
In order to delineate favorable exploration areas,this study integrates multisource datasets of GF-2 and Landsat-8 OLI remote-sensing imagery,digital elevation model(DEM),and airborne gamma-ray spectrometry(AGS)data together with regional geological information to effectively identify key surface indicators of sandstone-type uranium deposits in the eastern segment of the northern margin of the Qaidam basin.Systematic work was carried out on structural interpretation,extraction of remote-sensing alteration information,and analysis of airborne radiometric anomalies.Iron-staining and clay/hydroxyl alteration information were extracted using band ratios combined with the Crosta principal component analysis technique,while a comprehensive airborne uranium anomaly was identified by fusing U,U/Th,and U/K parameters.A"structure-alteration-radioactivity"spatial overlay model was then built within a GIS environment to screen the prospective areas.Fault structures in the study area are dominated by WNW-ESE and NW orientations.The remote sensing extracted ferrous and hydroxyl alteration assemblage anomalies exhibit strong spatial coupling with the comprehensive airborne uranium anomaly,coinciding well with major regional faults and known uranium mineralization,which are especially concentrated within the Aimunike Mountain uplift belt.Four favorable mineralization areas were delineated.The spatial coupling of the"ferrous+hydroxyl"alteration anomaly with the comprehensive airborne uranium anomaly under specific structural control,constitutes an efficient surface indicator system for sandstone-hosted uranium mineralization in this region.The Aimunike Mountain uplift belt has been identified as the most prospective exploration area at present.This study confirms that the integration of remote sensing with airborne gamma-ray spectrometry is an effective technical combination for rapidly pinpointing the favorable metallogenic sectors in the early stages of uranium exploration in arid to semi-arid terrains.关键词
砂岩型铀矿/柴达木盆地北缘/遥感地质/航空γ能谱/有利区优选Key words
sandstone-type uranium deposit/north margin of Qaidam basin/remote sensing geology/airborne gamma-ray spectrometry/favorable area selection分类
天文与地球科学引用本文复制引用
车永飞,张明林,刘德长,蔡煜琦,王培建,贺锋,赵兴齐..基于多源信息融合的柴达木盆地北缘东段砂岩型铀成矿有利区优选[J].世界核地质科学,2025,42(5):1091-1105,15.基金项目
柴达木盆地砂岩型铀矿资源高效预测技术及应用研究(编号:地H2301-1)、柴达木盆地铀成矿信息高分卫星遥感综合识别与技术应用(编号:202319-6) Supported byResearch and Application of High-Efficiency Prediction Technology for Sandstone-Type Uranium Deposit Resources in the Qaidam Basin(No.地 H2301-1).Comprehensive Identification and Technical Application of Uranium Metallogenic Information in the Qaidam Basin Using High-Resolution Satellite Remote Sensing(No.202319-6). （编号:地H2301-1）
