基于多源遥感的河北木吉村铜(钼)矿田蚀变信息与线环构造提取及找矿预测OA

The Mujicun Cu-Mo ore field in Hebei Province is located in the northern part of the Taihang Mountains tec-tonic magmatic belt,with a highly favorable geological background and mineralization environment,and is the most important copper polymetallic concentration area in the northern part of the Taihang Mountains.Given the high coverage of the Mujicun ore concentration area and challenges in data acquisition from multiple sources,previous studies primarily employed traditional geological methods.Conducting integrated multi-source remote sensing study enables the acquisition of regional geological data and delineation of mineralized alteration pat-terns,providing critical insights for subsequent geological research and mineral exploration in the area.The Mujicun ore field and its surroundings were chosen as the study area.Based on Sentinel-2A MSI and ASTER multispectral data,four types of alteration information were extracted by principal component analysis and ratio method,including iron stained,aluminum hydroxyl,magnesium hydroxyl,and silicification.The GF-5A AHSI hyperspectral data were processed and six alteration minerals were identified by using the spectral hourglass technique including hematite,pyrite,montmorillonite,kaolinite,muscovite,and chlorite.The distribution of al-teration minerals matches well with known deposits(occurrences),proving that the alteration information has good indicative significance for the distribution of the ore bodies.At the same time,we interpreted 92 linear structures and 13 circular structures in the study area using Sentinel-2A MSI and GF-2 PMS medium and high spatial resolution remote sensing data based on enhanced image information,compared with 1:20 0000 geolo-gical maps,yielded better results and revealed additional small-scale linear structures.Based on the comprehen-sive analysis of extracted alteration information and lineament-circular structures,four high prospective target areas have been identified.These findings can serve as a reference for future mineral exploration programs in the region.