Geosphere; February 2008; v. 4; no. 1;
p. 218-246; DOI: 10.1130/GES00126.1
© Geological Society of America
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Figure 5. Plot of ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) emissivity spectra of geomorphic and hot springs features identified as containing either quartz or carbonate using the ratio-based indices. Spectra of carbonate-bearing travertine terraces are shown at top. Hot springs features formed by hydrothermal processes are indicated in red at right. ASTER band centers are also shown. Note correspondence of spectral shapes with reference spectra shown in Figures 1 and 2. The spectrum of the Winnemucca Dunes was identified as quartz bearing based mainly on the sharp increase in emissivity between ASTER bands 12 and 13. The shape of the spectrum from bands 10–13 shows influence of a mixture with other minerals, possibly gypsum and muscovite.
Copyright © 2008 by Geological Society of America
