Research On The Method Of Extracting Alteration Information And Metallogenic Prediction Based On Multi-Information

With the leaping of geological data, the demand to application of geological data is increasing and complex. How better to extract the excrescent information of geochemical anomalies and models of extracting altered information have been the important problem of geologists concerned. We analyzed the spectral characteristics of typical altered minerals, summarized the spectral response characteristics of typical altered minerals on ETM+. We contrasted three kinds of models of extracting altered information, they were enhancing model which was basis on spectrum characters, the threshold model which was basis on PCA and the SAM model which was basis on spectrum vectors, and we firstly built the MPS model on the base of analysis the method of eliminating familiar interference information. The research discovered the result of MPS model tallied with the location of the known gold spots, and avoided the obviously false abnormality information. And we made use of this model to extracting the altered information in whole study area.