Application on extraction of iron-oxide and hydroxyl anomaly alteration information from the TM data in Ethiopia’s Halmo region

Ming Tao, Zhang Wenshan and Pe

Abstract

The authors firstly reviewed and discussed the extraction method of alteration anomalies from TM remote sensing data. TM remote sensing data in Ethiopia’s Halmo were processed. The iron-oxide and hydroxyl anomaly alteration information were extracted and analyzed based on the processed TM data. Anomaly alteration area was divided into three levels including high level, medium level and low level. The alteration anomalies distribution maps were completed to guide the further work.