Thermal emission measurements 2000-400 cm-1 (5-25 μm) of Hawaiian palagonitic soils and their implications for Mars
Abstract
The thermal emission of two palagonitic soils, common visible and near infrared spectral analogs for bright soils on Mars, was measured over the wavelength range of 5 to 25 μm (2000 to 400 cm-1) for several particle size separates. All spectra exhibit emissivity features due to vibrations associated with H2O and SiO. The maximum variability of emissivity is ~20% in the short wavelength region (5 to 6.5 μm, 2000 to 1500 cm-1), and is more subdued, <4%, at longer wavelengths. The strengths of features present in infrared spectra of Mars cannot be solely provided by emissivity variations of palagonite; some other material or mechanism must provide additional absorption(s).
- Publication:
-
Journal of Geophysical Research
- Pub Date:
- March 1995
- DOI:
- 10.1029/94JE02448
- Bibcode:
- 1995JGR...100.5309R
- Keywords:
-
- Analogs;
- Hawaii;
- Infrared Spectra;
- Mars Surface;
- Soils;
- Thermal Emission;
- Abundance;
- Data Reduction;
- Moisture Content;
- Spectroscopy;
- Vibration;
- Weathering;
- X Ray Fluorescence;
- Planetology: Solid Surface Planets: Surface materials and properties