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Based on the Landsat 8 OLI image, hydroxyl and the concomitant ferrous alterations in and around the Dexing porphyry polymetal deposit were preliminarily delineated by the fractal summation model, and the false anomalies therein unrelated to ore were successfully eliminated by the hot-spot analysis that can quantitatively reflect the clustering degree of the anomaly patches. Sequentially, the ratio...
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