1. Band ratio: B11/(B10+B12) Blue is low quartz content Red is high quartz contentGeoscience Applications: Use in combination with Silica index to more accurately map "crystalline" quartz rather than

Research Data Australia10

National ASTER Map TIR Silica index

Band ratio: B13/B10 Blue is low silica content Red is high silica content (potentially includes Si-rich minerals, such as quartz, feldspars, Al-clays) Geoscience Applications:...

澳大利亚2025-10-17 更新00

National ASTER Map TIR Gypsum index

1. Band ratio: (B10+B12)/B11 Blue is low gypsum content. Red is high gypsum content. Accuracy: Very Low: Strongly complicated by dry vegetation and often inversely correlated with quartz-rich material

Research Data Australia20

National ASTER Map TIR Quartz index