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  • 1
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    Transmission measurements (4000-400 cm(exp -1), 2.5-25 microns) of crystalline ferric oxides and ferric oxyhydroxides: Implications for Mars (1994)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: Transmission spectra of three ferric oxides (two alpha-Fe2O3 samples and one gamma-Fe2O3 sample) and two ferric oxyhydroxides (alpha-FeOOH and gamma-FeOOH) were measured. This preliminary study has demonstrated that crystalline ferric oxides and ferric oxyhydroxides exhibit complex spectral features at thermal wavelengths. Some of these features suggest that thermal infrared observations of Mars can provide significant insight into the ferric mineralogy of that planet. The results of this study suggest that emissivity spectra of crystalline ferric oxides and ferric oxyhydroxides may prove quite important for the interpretation of thermal infrared spectral observations of Mars.
    Keywords: GEOPHYSICS
    Type: Lunar and Planetary Inst., The Twenty-Fifth Lunar and Planetary Science Conference. Part 3: P-Z; p 1165-1166
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Changes in Hawaiian palagonite FE mineralogy associated with thermal alteration: Implications for Mars (1993)
    In:  Other Sources
    Details
    Publication Date: 2019-01-25
    Description: We have studied six Hawaiian palagonitic tephra samples (PH-1 through PH-6) from a site where a Mauna Loa lava flow has partially embayed a Mauna Kea cinder cone Tephra samples that were not affected by the lava flow (PH-5, PH-6) consist of partially palagonitized coarse-grained glassy Hawaiitic particles whose iron mineralogy is dominated by nanophase ferric oxide (np-Ox) and olivine. Samples closest to the lava flow (PH-1 through PH-4) have been strongly altered and their iron mineralogy is dominated by np-Ox, magnetite, and hematite. This suite of samples has many spectral similarities to Martian bright regions; thus, this localized thermal alteration event may be an analog to similar processes on Mars that lead to the production of small amounts of crystalline ferric oxides within a poorly-crystalline or amorphous palagonitic matrix.
    Keywords: GEOPHYSICS
    Type: Lunar and Planetary Inst., Twenty-fourth Lunar and Planetary Science Conference. Part 1: A-F; p 85-86
    Format: text
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    NASA TECHNICAL REPORTS
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