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<p>Recent analyses of subsurface reflectors of radargrams received from the Mars Advanced Radar aboard the Mars Express orbiter (MEx) in the extensive equatorial Medusae Fossae Formation (MFF) pointed towards the presence of ice-rich and layered deposits. Our remote sensing approach working with the gravity aspects, namely with the combed strike angles, computed from the recent gravity field model of Mars (with a ground resolution of 130&#xa0;km) provides an independent check. We observed clearly linearly-aligned combed strike angles for the MFF province (and for many more localities), organized into the segments with one-way common orientation of a much larger size than is the gravity model ground resolution (and in turn statistically significant). It is typical of and implies porous material, groundwater sources, subsurface water ice, light constituents in the sedimentary layers or their various mixtures. Also, for the MFF, it is indicative of a lower density or higher porosity material, compared to surrounding rocks. It is proposed that this result is evidence of presence of ice in MFF.</p>

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Medusae Fossae Formation of Mars has ice-rich deposits – an independent check

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月26日

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  • Jaroslav Klokočník,
  • Jan Kostelecký,
  • Aleš Bezděk

摘要

Recent analyses of subsurface reflectors of radargrams received from the Mars Advanced Radar aboard the Mars Express orbiter (MEx) in the extensive equatorial Medusae Fossae Formation (MFF) pointed towards the presence of ice-rich and layered deposits. Our remote sensing approach working with the gravity aspects, namely with the combed strike angles, computed from the recent gravity field model of Mars (with a ground resolution of 130 km) provides an independent check. We observed clearly linearly-aligned combed strike angles for the MFF province (and for many more localities), organized into the segments with one-way common orientation of a much larger size than is the gravity model ground resolution (and in turn statistically significant). It is typical of and implies porous material, groundwater sources, subsurface water ice, light constituents in the sedimentary layers or their various mixtures. Also, for the MFF, it is indicative of a lower density or higher porosity material, compared to surrounding rocks. It is proposed that this result is evidence of presence of ice in MFF.