Identification of Rare Metal Dikes by Multi-Platform Synchronous Thermal Infrared Remote Sensing in Hutoushan Area
Remote sensing identification of rare metal deposit dikes in the north margin of North China block has important practical needs and theoretical significance.In view of the technical difficulties of vein recognition and the special geological background of the study area,it proposes a"Space-Sky-Ground"synchronous thermal infrared remote sensing algorithm for Nb-Ta polymetallic deposit vein recognition to assist the identification of metallogenic veins.The algorithm uses landsat-8 satellite data and UAV thermal infrared data collected synchronously as the main data source to calculate and correct the surface specific emissivity.Combined with the emission characteristics of Tianhe Petrochemical albite granite and threshold segmentation method,13 dike development areas were delimited and verified in the field.The results show that the accuracy and reliability of the proposed algorithm are high,and the"Space-Sky-Ground"synchronous thermal infrared remote sensing can be used to identify rare metal dikes in Hutoushan area.This study has provided guidance for the exploration of niobium-tantalum deposits in the study area,and will also provide a useful reference for the remote sensing detection and identification of rare metal deposits.
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