SPECTRAL RESOLUTION 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
Multispectral et , > Hyperspectral 
400 blue hues 
excavations, roads 
S00 green hues 
vegetation 
600 red hues 
iron oxides 
ferrugenous formations 
700 red edge shift 
red edge shift 
vegetation red edge shift 
800 
hematite 
vegetation 
900 Iron oxides jarosite 
geothite 
1000 
ee PEN 
1400 jarosite 
uw amorphous iron oxides 
Sa 
2 1500 leucocratic rocks 
E 
oO 
S 1600 light vs. dark tones 
£ 
x 1700 
O 
zZ 
LLI 1800 
a) 
> 
< 1900 
< gypsum 
sulfates 
2000 buddingtonite 
ammonium silicates 
scale change 
iE dO pyrophyllite 
acid sulfate 
minerals alunite 
hydroxyl silicates 
2200 sericite 
phyllic argillic illite 
carbonates minerals kaolinite/dickite 
montmorillonite 
amorphous silica 
2300 calcite 
sulfates propylitic 
minerals epidote 
chlorite 
2400 
  
  
  
  
  
Figure 1. Important spectral intervals for discriminating some key alteration 
minerals and differentiating other features. 
640 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B7. Vienna 1996