[IEEE IGARSS 2001. Scanning the Present and Resolving the Future. Proceedings. IEEE 2001 International Geoscience and Remote Sensing Symposium - Sydney, NSW, Australia (9-13 July 2001)] IGARSS 2001. Scanning the Present and Resolving the Future. Proceedings. IEEE 2001 International Geoscience and Remote Sensing Symposium (Cat. No.01CH37217) - Spectrally mapping the compositional variation of white micas in hydrothermal systems and the application in mineral exploration