A new exploration parameter for metallic deposits: The alteration remote sensing anomaly

A new parameter for the prediction of the mineral resources,the alteration remote sensing anomalies,is proposed. The geological basis and the spectral presupposition for the alteration anomalies are discussed. An advanced system for extraction of hydrothermal alteration assemblages, using ETM+ and Aster data, was developed. The simplified flow chart of this system, "De-interfered Anomalous Principal Component Thresholding Technique", is shown below. Some new terms are defined. The RM (Ratio Method), SAM (Spectral Angle Mapper) and PCA (Principle Component Analysis) are compared by the analysis of their principle and by model test. PCA is selected as the main method with SAM as the supplementary one. The essential conceptions of the probability theory were quoted. The standard deviation s is used as the measure for anomaly slicing (Thresholding).