7 June 2016 Mapping advanced argillic alteration zones with ASTER and Hyperion data in the Andes Mountains of Peru
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Abstract
This study evaluates Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) and Hyperion hyperspectral sensor datasets to detect advanced argillic minerals. The spectral signatures of some alteration clay minerals, such as dickite and alunite, have similar absorption features; thus separating them using multispectral satellite images is a complex challenge. However, Hyperion with its fine spectral bands has potential for good separability of features. The Spectral Angle Mapper algorithm was used in this study to map three advanced argillic alteration minerals (alunite, kaolinite, and dickite) in a known alteration zone in the Peruvian Andes. The results from ASTER and Hyperion were analyzed, compared, and validated using a Portable Infrared Mineral Analyzer field spectrometer. The alterations corresponding to kaolinite and alunite were detected with both ASTER and Hyperion (80% to 84% accuracy). However, the dickite mineral was identified only with Hyperion (82% accuracy).
© 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)
Yuddy Ramos, Kalifa Goïta, Stéphane Péloquin, "Mapping advanced argillic alteration zones with ASTER and Hyperion data in the Andes Mountains of Peru," Journal of Applied Remote Sensing 10(2), 026031 (7 June 2016). https://doi.org/10.1117/1.JRS.10.026031 . Submission:
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