Observational evidence of crystalline iron oxides on Mars

Details Observational evidence of crystalline iron oxides on Mars Observational evidence of crystalline iron oxides on Mars

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9514447b&link_type=abstract

(American Geophysical Union and Geological Society of America, International Conference on Mars, 4th, Tucson, AZ, Jan. 10-13, 19

Mathematics

Logic

126

Astronomical Spectroscopy, Crystal Structure, Infrared Spectra, Iron Oxides, Mars Surface, Spectral Reflectance, Data Acquisition, Data Reduction, Spectral Resolution

Scientific paper

A series of new spectral observations of Mars was obtained at Mauna Kea Observatory in the 0.4-1.0-micron wavelength range during the extremely favorable 1988 opposition, which yielded new spectral reflectance and relative reflectance data for a number of distinct spots on the Martian surface at 500-600 km spatial resolution. The new spectra revealed absorptions at 0.62-0.72 micron and at 0.81-0.94 micron, both seen clearly for the first time. These absorption features are interpreted as Fe(3+) electronic transition bands that indicate the presence of crystalline ferric oxide or hydroxide minerals on the Martian surface.

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