9
The spectral signature of muscovite is character-
ized by its absorption peaks in the ranges 1.41μm (OH),
2.18–2.20μm (Band 6) and the double absorption feature
at 2.34μm and 2.43μm. Additionally, the H2O feature
(1.93μm) is ¼ the depth of the 2.18–2.20μm absorp-
tion feature, which differentiates muscovite from illite.
Montmorillonite has absorption peaks in the ranges
1.41μm (OH), 1.90μm (H2O) and 2.39μm. And finally,
the tourmaline spectrum has an absorption peak in the
range 0.52μm (Caiza, 2018).
Figure 9 shows the spectral signatures of the miner-
als corresponding to the argillic phyllic alteration, where
muscovite presents two absorption peaks (2.20 µm and
2.34 µm) the same happens with montmorillonite
Figure 9. SAM spectral classification of minerals. Advanced Argillic alteration. (a) pyrophyllite, (b) alunite and (c) kaolinite.
Argillic to phyllic alteration. (d) Montmorillonite, (e) illite and (f) muscovite. Propylitic alteration (g) calcite, (h) chlorite and
(i) epidote
The spectral signature of muscovite is character-
ized by its absorption peaks in the ranges 1.41μm (OH),
2.18–2.20μm (Band 6) and the double absorption feature
at 2.34μm and 2.43μm. Additionally, the H2O feature
(1.93μm) is ¼ the depth of the 2.18–2.20μm absorp-
tion feature, which differentiates muscovite from illite.
Montmorillonite has absorption peaks in the ranges
1.41μm (OH), 1.90μm (H2O) and 2.39μm. And finally,
the tourmaline spectrum has an absorption peak in the
range 0.52μm (Caiza, 2018).
Figure 9 shows the spectral signatures of the miner-
als corresponding to the argillic phyllic alteration, where
muscovite presents two absorption peaks (2.20 µm and
2.34 µm) the same happens with montmorillonite
Figure 9. SAM spectral classification of minerals. Advanced Argillic alteration. (a) pyrophyllite, (b) alunite and (c) kaolinite.
Argillic to phyllic alteration. (d) Montmorillonite, (e) illite and (f) muscovite. Propylitic alteration (g) calcite, (h) chlorite and
(i) epidote