Physics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3623204c&link_type=abstract
Geophysical Research Letters, Volume 36, Issue 23, CiteID L23204
Physics
5
Planetary Sciences: Solar System Objects: Mars, Planetary Sciences: Solid Surface Planets: Volcanism (6063, 8148, 8450), Physical Properties Of Rocks: Magnetic And Electrical Properties (0925), Planetary Sciences: Solid Surface Planets: Remote Sensing, Planetary Sciences: Solid Surface Planets: Surface Materials And Properties
Scientific paper
The SHARAD instrument on the Mars Reconnaissance Orbiter detects subsurface interfaces beneath lava flow fields northwest of Ascraeus Mons. The interfaces occur in two locations; a northern flow that originates south of Alba Patera, and a southern flow that originates at the rift zone between Ascraeus and Pavonis Montes. The northern flow has permittivity values, estimated from the time delay of echoes from the basal interface, between 6.2 and 17.3, with an average of 12.2. The southern flow has permittivity values of 7.0 to 14.0, with an average of 9.8. The average permittivity values for the northern and southern flows imply densities of 3.7 and 3.4 g cm-3, respectively. Loss tangent values for both flows range from 0.01 to 0.03. The measured bulk permittivity and loss tangent values are consistent with those of terrestrial and lunar basalts, and represent the first measurement of these properties for dense rock on Mars.
Campbell Bruce A.
Carter Lynn Marie
Egan Anthony F.
Holt John W.
Mattei Stefania
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