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Abstract The identification and extraction of mineralized alteration information play an important role in the ore prospecting using remote sensing technology. Taking the Beiya gold polymetallic deposit as an example, this study designed an alteration information extraction scheme using the principal component analysis technique according to Landsat8 OLI data and the spectral characteristics related to mineral alteration. Specifically, the extraction scheme consists of the removal of interference information (vegetation, water, and shadows), extraction of abnormal information, anomaly gradation, median filtering, and anomaly screening successively. According to the anomaly information extracted, as well as geological interpretation of remote sensing data (lithology and structures) and field surveys, three prospecting areas were delineated in the study area. This will provide basic data and decision-making bases for the ore prospecting in the Beiya area.
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Keywords
alteration anomaly information extraction
principal component analysis
remote sensing
geological interpretation
ore prospecting
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Issue Date: 24 September 2021
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