摘要
本研究以攀西裂谷带德昌地区为例,针对复杂构造区矿产资源勘探需求,构建了“高分辨率地质解译—多光谱/高光谱蚀变提取—地表验证”的多源遥感协同技术体系。基于GF-2(0.8 m)高分辨率影像解译地层单元、断层及环形构造;利用Landsat-8数据通过主成分分析提取羟基和铁染蚀变异常;结合资源一号02D高光谱数据,采用混合调谐匹配滤波技术识别蒙脱石、萤石和绿帘石蚀变矿物分布。研究共解译线性构造140条、环形构造6处,结合多源遥感的构造、蚀变异常信息圈定8处找矿靶区。其中B3、B4靶区基性—酸性岩体内发育明显的褐铁矿化与绿帘石化,B7靶区花岗岩风化壳稀土元素达工业品位。结果表明遥感异常与构造及矿化蚀变具有显著空间耦合关系,多源遥感协同的技术方法为复杂构造区找矿提供了有效技术范式。
To overcome the challenges of mineral exploration in complex structural zones,this study developed a multi-sourceremote sensing collaborative methodology that integrates"high-resolution geological interpretation,multispectral/hyperspectral alteration extraction,and ground verification"in the Dechang area of the Panxi Rift Zone.High-resolution GF-2 imagery(0.8 m)wasemployed to interpret stratigraphic units,faults,and circular structures.Landsat-8 data were processed using principal componentanalysis to extract hydroxyl and iron-stained alteration anomalies.Additionally,ZY-1-02D hyperspectral data were analyzed via themixture tuned matched filtering(MTMF)technique to identify the spatial distribution of alteration minerals,includingmontmorillonite,fluorite,and epidote.The study delineated 140 linear structures and six circular structures,which led to theidentification of eight prospective exploration targets.Notably,Targets B3 and B4 exhibit significant limonitization and epidotizationwithin intermediate-acidic intrusions,while Target B7 contains a granite weathering crust with rare earth elements(REEs)reachingindustrial-grade concentrations.The results demonstrate a strong spatial correlation between remote sensing anomalies,regionalstructures,and mineralization-related alterations.The proposed multi-source remote sensing approach enhances prospectingefficiency in complex structural zones and provides a transferable technical framework for mineral exploration in analogousgeological settings.
作者
代雪健
聂飞
董航
邹佳作
胡欣欣
李健
王远超
雷栋
李俊
姚波
DAI Xuejian;NIE Fei;DONG Hang;ZOU Jiazuo;HU Xinxin;LI Jian;WANG Yuanchao;LEI Dong;LI Jun;YAO Bo(Civil-Military Integration Center of China Geological Survey,Chengdu 610036,China;Chengdu Center,ChinaGeological Survey(Geosciences Innovation Center of Southwest China),Chengdu 610218,China;Kunming General Survey ofNatural Resources Center,China Geological Survey,Kunming 650100,China)
出处
《沉积与特提斯地质》
北大核心
2025年第4期833-845,共13页
Sedimentary Geology and Tethyan Geology
基金
部省合作项目“攀西地区铜铁多金属典型矿床勘查技术研究与增储示范”(2024ZRBSHZ143)
中国地质调查局地质调查项目“攀西冕宁-德昌地区稀土及多金属矿产地质调查”(DD20220965),“四川攀西地区钨锡铌钽等多金属矿资源调查评价”(DD20243103)。
关键词
多源遥感
地质解译
蚀变信息提取
高光谱
攀西裂谷带
multi-source remote sensing
geological interpretation
alteration information extraction
hyperspectral
Panxi RiftZone
