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On Water Detection in Martian Subsurface using sounding Radar

hal.structure.identifierLunar and Planetary Institute [Houston] [LPI]
dc.contributor.authorHEGGY, Essam
hal.structure.identifierLaboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
hal.structure.identifierObservatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorPAILLOU, Philippe
hal.structure.identifierLaboratoire de l'intégration, du matériau au système [IMS]
dc.contributor.authorRUFFIÉ, Gilles
hal.structure.identifierEnvironnement, Géo-ingénierie et Développement [EGID]
dc.contributor.authorMALÉZIEUX, J.-M.
dc.contributor.authorCOSTARD, F.
hal.structure.identifierBureau de Recherches Géologiques et Minières [BRGM]
dc.contributor.authorGRANDJEAN, Gilles
dc.date.created2001
dc.date.issued2001
dc.identifier.issn0019-1035
dc.description.abstractEnSeveral radar experiments are planned to map the martian subsurface down to several kilometers, searching for subsurface liquid water reservoirs, using different concepts and techniques, all based on the penetration property of radio frequency waves in arid soils. The penetration depth of low-frequency radar is mainly related to the electromagnetic properties of the investigated medium. Thus a good knowledge of the martian subsurface dielectric profile along the first few kilometers is necessary for future water identification and data interpretation. In this work we have investigated the electrical and magnetic properties of the martian surface and subsurface, using terrestrial laboratory analogues in the frequency range 1-500 MHz, covering the frequency domain of the Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) experiment on board the Mars Express mission (ESA-2003), the NetLander ground-penetrating radar (GPR) (CNES-2007), and future sounding radar that may be updated to the Mars exploration program in the "follow the water" strategy. In our approach, we constructed experimentally the most common dielectric profile representative of the martian subsurface by measuring the electric permittivity and magnetic permeability of well defined mixtures of basaltic, volcanic, and sedimentary materials that have been reported for Mars. We also considered iron oxides (hematite and maghemite) and evaporites that may be present, such as gypsum, and their mixtures with representative amounts of the martian geological context under the most common petrophysical and geophysical conditions, along the subsurface profile. This led to synthetic representative samples of the martian subsurface materials under adequate conditions of porosity and temperature that should exist in the first 2.5 km of the upper crust. Dielectric measurements show that the first layers of the martian subsurface (a few hundred meters), which are mainly composed of volcanic iron-rich materials, could dramatically decrease the radar penetration depth initially foreseen, thus limiting deep subsurface exploration. We also investigated the constraints on subsurface water detectability in a radar lossy medium and its dielectric identification among surrounding geological materials.
dc.language.isoen
dc.publisherElsevier
dc.subject.enMarsAbbreviations: radarAbbreviations: subsurfaceAbbreviations: mineralogy
dc.title.enOn Water Detection in Martian Subsurface using sounding Radar
dc.typeArticle de revue
dc.identifier.doi10.1006/icar.2001.6717
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO]
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO]
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]
dc.subject.halSciences de l'ingénieur [physics]/Electromagnétisme
dc.subject.halPlanète et Univers [physics]/Sciences de la Terre/Paléontologie
bordeaux.journalIcarus
bordeaux.page244-257
bordeaux.volume154
bordeaux.issue2
bordeaux.peerReviewedoui
hal.identifierhal-00320092
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00320092v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Icarus&rft.date=2001&rft.volume=154&rft.issue=2&rft.spage=244-257&rft.epage=244-257&rft.eissn=0019-1035&rft.issn=0019-1035&rft.au=HEGGY,%20Essam&PAILLOU,%20Philippe&RUFFI%C3%89,%20Gilles&MAL%C3%89ZIEUX,%20J.-M.&COSTARD,%20F.&rft.genre=article


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