An unusual spectral unit in West Candor Chasma - Evidence for aqueous or hydrothermal alteration in the Martian Canyons

Details An unusual spectral unit in West Candor Chasma - Evidence for aqueous or hydrothermal alteration in the Martian Canyons An unusual spectral unit in West Candor Chasma - Evidence for aqueous or hydrothermal alteration in the Martian Canyons

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993icar..106..380g&link_type=abstract

Icarus, vol. 106, p. 380

Physics

45

Mars Surface, Canyons, Iron Oxides, Spaceborne Photography, Ground Water, Spatial Resolution, Viking Orbiter 1, Spectral Reflectance

Scientific paper

Quantitative color analysis of Viking Orbiter MS images has identified two spatially coherent regions of unique hue, possibly crystalline ferric oxides-bearing, among the interior layered deposits in western Candor Chasma. The color could be explained by a small increase in either the crystallinity or the abundance of hematite. Water is implied by iron oxides' formation, and further suggests that the mineralization occurred through the secondary alteration of preexisting rocks by ponded surface water or groundwater seepage.

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